Simple solvent-free synthesis of rod-like Cu-doped V2O5 for high storage capacity cathode materials of lithium ion batteries
Publication date: Available online 17 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Hongyu Zhang, Yaling Rong, Wei Jia, Hui Chai, Yali CaoAbstractRod-like Cu-doped V2O5 were synthesized by an extraordinary simple solid-state chemical route. Cu doping not only increases the cell volume, but also introduces abundant oxygen vacancies in V2O5 crystal lattice, which is benefit for fast electron and ion transport during charging-discharging process. As a result, the rod-like Cu-doped V2O5 exhibited a high discharge specific capacity of 293.1 mA h g−1 at 1 C, much higher than the undoped V2O5 with the c...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Synergistic effect of silica coated porous rodlike nickel ferrite and multiwalled carbon nanotube with improved electromagnetic wave absorption performance
In this study, multiwalled carbon nanotube (MWCNT) anchored on the surface of silica coated porous rodlike nickel ferrite (NiFe2O4@SiO2) composite was fabricated, and its structure, composition, magnetic and electromagnetic (EM) wave absorption properties were studied. High-performance EM wave absorption properties of the ternary composite can be regulated by the coating thickness and the content of the absorber. The reflection loss (RL) was optimized to −67.8 dB at the matching thickness of 1.9 mm, and the effective absorption bandwidth (RL  ≤ -10 dB) was 4.5 GHz (13.5–18 GHz) at the coati...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

DDRX and CDRX of an as-cast nickel-based superalloy during hot compression at γ′ sub-/super-solvus temperatures
Publication date: Available online 17 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Bingchao Xie, Hao Yu, Tao Sheng, Yuhang Xiong, Yongquan Ning, M.W. FuAbstractTaking the importance of γ′ phase into consideration, an as-cast nickel-based superalloy was investigated by uniaxial compression experiments performed at sub-solvus and super-solvus temperatures. Several different strains were utilized to trace the processes of deformation and microstructural evolution. Electron backscatter diffraction was employed to characterize the microstructures. The results reveal that the volume fraction of DRX grai...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Preparation of Nb2O5 with an air filter-like structure and its excellent electrochemical performance in supercapacitors
Publication date: Available online 17 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Jingqiang Liu, Kaixiong Xiang, Wei Zhou, Yirong Zhu, Li Xiao, Wenhao Chen, Han ChenAbstractA Nb2O5 compound with a structure similar to an air filter (AF-Nb2O5) was synthesized using a hydrothermal method, and further calcined to form a product that was designated CAF-Nb2O5. The morphology and microstructure of the AF-Nb2O5 and CAF-Nb2O5 were examined using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The AF-Nb2O5 and CAF-Nb2O5 exhibited similar filter-like structures, which consisted of...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Hierarchically structured AgO films with nano-porosity for photocatalyst and all solid-state thin film battery
Publication date: Available online 17 June 2019Source: Journal of Alloys and CompoundsAuthor(s): W. Xu, S.Q. Wang, Q.Y. Zhang, C.Y. Ma, Q. Wang, D.H. Wen, X.N. LiAbstractHierarchically structured porous films are urgently needed in the development of some practical devices. In this work, we report an effective way for fabrication of hierarchically porous AgO films by oxidizing Ag films in the environment offered by reactive magnetron sputtering deposition of NiO. The method is capable of fabricating hierarchically structured AgO films with rich nano-porosity and is easily applied to large-scale production. Under the given ...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Magnesium fluoride doped MgTiO3 ceramics with ultra-high Q value at microwave frequencies
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Zhenpeng Xu, Lingxia Li, Shihui Yu, Mingkun Du, Weijia LuoAbstractMicrowave ceramic with ultra-high Q value is one of the most significant classes of material to realize the miniaturization and integration of microwave devices. In this paper, to improve the microwave dielectric properties of ceramics, MgTiO3-x wt.% MgF2 (x = 0, 3, 4, 5, and 6) microwave ceramics with high-quality factor were synthesized by solid-state reaction method. The effects of MgF2 addition on the phase composition, sintering behavior, and microwave d...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Studies on luminescence properties of double perovskite deep red phosphor La2ZnTiO6:Mn4+ for indoor plant growth LED applications
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Zaifa Yang, Lulu Yang, Changjian Ji, Denghui Xu, Chengqiang Zhang, Honngxia Bu, Xia Tan, Xiangyan Yun, Jiayue SunAbstractA non-rare-earth doped double perovskite La2ZnTiO6:Mn4+ phosphor with the single-phase was prepared by solid-state reaction. The composition and the distribution of La2ZnTiO6:0.5%Mn4+ phosphor was confirmed by the scanning electron microscope and energy-dispersive spectroscopy. The optical band gap of La2ZnTiO6 was analyzed by density functional theory using the CASTEP code, which matched well with the result...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Study on Na3Lu1-xEux(PO4)2 phosphor: High efficient Na3Eu(PO4)2 red emitting phosphor with excellent thermal stability
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Dorim Kim, Bo Ram Lee, Sung Heum Park, Jung Hwan Kim, Jung Hyun JeongAbstractHigh efficient Na3(Lu1-xEux)(PO4)2 orthophosphates phosphors were synthesized by conventional solid state reaction method. The obtained phosphors crystallized in the orthorhombic system with the space group Pca21. Since the crystal structure of the phosphor is composed of isolated PO4 tetrahedra, the average distance between rare earth ions was distant. As the concentration of Eu3+ activator ion reaches to 100%, reduced Judd-Ofelt parameter ratio of &O...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Corrosion evaluation of superalloys Haynes 282 and Inconel 718 in hydrochloric acid
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): L.O. Osoba, A.M. Oladoye, V.E. OgbonnaAbstractCorrosion susceptibility of Haynes 282 (HY282) and Inconel 718 (IN718) superalloys in hydrochloric acid at ambient temperature was investigated using gravimetric and electrochemical techniques. In the gravimetric study, corrosion rate of the superalloys in 0.5 M, 0.75 M, and 1 M HCl for 72 days was evaluated using weight loss method. The concentration of metallic ions in the 1 M electrolyte after the immersion test was estimated using Atomic Absorption Spectroscopy and surfa...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Facile fabrication of g-C3N4/SnO2 composites and ball milling treatment for enhanced photocatalytic performance
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Kaixing Zhu, Yang Lv, Jing Liu, Wenjun Wang, Chunping Wang, Songmei Li, Peng Wang, Meng Zhang, Alan Meng, Zhenjiang LiAbstractUltrafine SnO2 nanoparticles (NPs) with diameters of 2–4 nm were in situ fabricated on the surfaces of g-C3N4 material through a hydrothermal method. Ball milling was then applied to treat the obtained g-C3N4/SnO2 composites in order to improve the dispersion of SnO2 NPs as well as to strengthen the bonding between SnO2 and g-C3N4. The enhanced separation efficiency of photogenerated carriers, as...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

In-situ construction of Bi2SiO5/BiOBr heterojunction with significantly improved photocatalytic activity under visible light
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Bo Chai, Juntao Yan, Guozhi Fan, Guangsen Song, Chunlei WangAbstractTo further improve the light response range and photocatalytic activity of Bi2SiO5, the Bi2SiO5/BiOBr type-II heterojunction photocatalysts were constructed by in-situ partial ion exchange strategy using Bi2SiO5 as precursor. The crystal phases, morphologies, chemical compositions, optical properties and textural structures of as-synthesized Bi2SiO5/BiOBr photocatalysts were characterized by the corresponding analytical techniques. The photocatalytic activities...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Carbide precipitation strengthening in fine-grained carbon-doped FeCoCrNiMn high entropy alloy
In this study, a heavy-carbon doped equiatomic FeCoCrNiMn HEA with 1.3 at.% C addition (FeCoCrNiMn-1.3C) was prepared to provide an insight into the effect of carbides precipitation on the strength of the HEA. The results showed that FeCoCrNiMn-1.3C HEA exhibited a single FCC structure after homogenization treatment at 1220 °C for 6 h and the subsequent severe cold rolling (SCR) with 95% reduction. It was found that nano-sized M23C6 carbides can precipitate and exist stably in the SCRed FeCoCrNiMn-1.3C HEA during annealing at 700–1000 °C. These nano-sized carbide precipitations can substantially inhib...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Low-temperature properties of BaWO4 based on experimental heat capacity in the range 5.7–304 K
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): A.E. Musikhin, M.A. Bespyatov, V.N. Shlegel, O.E. SafonovaAbstractThe heat capacity of barium tungstate single crystal was measured by the adiabatic method in the range of 5.7–304 K. No anomalies in the heat capacity associated with the phase transition were found. The analysis of the functional behavior of heat capacity near zero revealed a low-frequency peak in the phonon density of states of BaWO4. An approach was proposed to allow quantitative description of the acoustic wing of the phonon density of states. The app...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Novel germanide Ce2RuGe: Synthesis, crystal structure and low-temperature physical properties
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): D. Kaczorowski, E. Murashova, Zh Kurenbaeva, A. GribanovAbstractNovel ternary intermetallic phase Ce2RuGe was synthesized via arc-melting of the constituents and subsequent annealing at 700°С. Its crystal structure was determined from the powder X-ray diffraction data collected at room temperature. The compound crystallizes in the orthorhombic structure of a new type: space group Pmmn (No. 59), lattice parameters: a = 4.38235(5) Å, b = 4.31818(5) Å, c = 9.91496(15) Å, Z = 2, Pearson symbol...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Enhanced photoresponse of n-ZnO/p-GaN heterojunction ultraviolet photodetector with high-quality CsPbBr3 films grown by pulse laser deposition
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Yu Huang, Lichun Zhang, Jianbu Wang, Xinbo Chu, Dengying Zhang, Xiaolong Zhao, Xiaofei Li, Lianjie Xin, Yuan Zhao, Fengzhou ZhaoAbstractHigh-quality CsPbBr3 thin films have been fabricated by pulse laser deposition (PLD) technique and severed as an interlayer for n-ZnO/p-GaN heterojunction ultraviolet (UV) photodetector. The self-powered photodetectors based on n-ZnO/CsPbBr3/p-GaN heterojunction exhibited a high peak responsivity of 44.53 mA/W and detectivity of 2.03✕1012 cm·Hz1/2W−1 under zero bias voltage, ...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Mesoporous CoFe alloy@SiO2 nanocapsules with controllable Co/Fe atomic ratio for highly efficient tunable electromagnetic wave absorption
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Meng Li, Zhihong Yang, Yu zhang, Dinghua Hu, Xujian LyuAbstractExploring new types of electromagnetic wave absorption materials with lightweight, strong and tunable wideband absorption are highly desirable but remains a significant challenge. Herein, hybrid composites consisting of mesoporous CoFe nanoparticles embedded within SiO2 nanocapsules have been rationally synthesized. By controlling the experimental conditions, the CoxFe3-x@SiO2 nanocapsules with different Fe/Co atomic ratio can be obtained. The scanning electron micr...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Influence of boron contents on microstructure, mechanical properties and shielding effect of Fe–W–C alloy
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Tang Dewen, Zou Shuliang, Yan LiangAbstractBy using vacuum sintering method, the shielding materials made of iron-tungsten-carbon-boron (Fe–W–C–B) alloys with different boron (B) contents were prepared. The influences of different B contents on mechanical properties, shielding performance and microstructures of the alloys were investigated. The research results showed that with increasing B content, the fracture of alloys changed from plastic to brittle fractures and the higher the B content was, the more seri...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

WO3/BiVO4/BiOCl porous nanosheet composites from a biomass template for photocatalytic organic pollutant degradation
Publication date: Available online 18 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Huali Li, Yajie Chen, Wei Zhou, HaiYu Jiang, He Liu, Xi Chen, Tian GuohuiAbstractWe have demonstrated the design and optimization of a three-component WO3/BiVO4/BiOCl heterojunction photocatalyst based on a two-step synthetic route. The porous BiVO4 nanosheets were first prepared by an immersion-calcination method using biomass broomcorn core as template. Then, the prepared porous BiVO4 nanosheets reacted with WCl6 to construct WO3/BiVO4/BiOCl ternary composites by simultaneously producing WO3 and BiOCl nanoflakes on the surfac...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Flexible solid-state supercapacitor based on reduced graphene oxide-enhanced electrode materials
In this study, we developed a high-performance supercapacitor by building a three-dimensional (3D) reduced graphene oxide (rGO) structure on a CNT-Fe3O4-PANI film. The porous rGO structure with a large surface area endows rGO-CNT-Fe3O4-PANI electrodes with excellent electrochemical properties, such as a specific capacitance of 414.5 F g−1 at 1 A g−1. Moreover, a symmetric supercapacitor device with rGO-CNT-Fe3O4-PANI electrodes demonstrated a remarkable cell performance, with an energy density of 60.8 Wh kg−1, a power density of 45.2 kW kg−1 and an excellent cycle life, indicating that...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

High-pressure high-temperature study of the pressure induced decomposition of the iron nitride γ′-Fe4N
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): M.H. Wetzel, M.R. Schwarz, A. LeineweberAbstractPre-pressed powder samples of γ′-Fe4N were heat treated at a pressure of 13 GPa and temperatures between 400 and 880 °C in a multi-anvil setup. The phase composition and microstructure, which had emerged at the treatment temperature and pressure, were preserved by rapid quenching and subsequent decompression at room temperature. The recovered samples were investigated by X-ray diffraction as well as by microstructural analysis in a scanning electron microscope....
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Magnetostructural phase transitions and magnetocaloric effect in Mn(As,P) compounds and their composites
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): G.A. Govor, V.I. Mitsiuk, S.A. Nikitin, N.Yu. Pankratov, A.I. SmarzhevskayaAbstractThe magnetostructural phase transition in Mn(As,P) compounds was studied by a combination of X-ray diffraction on single crystals and by the magnetisation measurements. The mentioned transition is accompanied by anisotropic deformation of the crystal lattice, magnetisation hopping and heat evolving due to a large magnetocaloric effect (MCE). It is shown that this transition is a transformation from the hexagonal ferromagnetic to the orthorhombic ...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Altering the wetting properties of orthopaedic titanium alloy (Ti–6Al–7Nb) using laser shock peening
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Xiaojun Shen, Pratik Shukla, Philip Swanson, Zhibin An, S. Prabhakaran, David Waugh, Xiangfan Nie, Christopher Mee, Soheil Nakhodchi, Jonathan LawrenceAbstractThis work focuses on exploiting the effects of laser shock peening (LSP) to control the wetting characteristics of bio-material surfaces integrated with surface characteristics such as surface energy, macro and nano-topography. In particular, the effects of laser energy and beam footprint overlap of LSP were explored on Ti–6Al–7Nb alloy, quantified by using th...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Hole conductivity in the electrolyte of proton-conducting SOFC: Mathematical model and experimental investigation
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Qingping Zhang, Yuxiang Guo, Jinwen Ding, Sihan XiaAbstractProton-conducting solid oxide fuel cell (SOFC) is promising for the intermediate and low temperature applications. The hole conductivity within the electrolyte has noticeable impact on the cell performance. In this article, a new model is proposed to evaluate the hole conductivity of the electrolyte directly. Single cells with different electrolyte thicknesses are fabricated to validate our model. The BaCe0.7Zr0.1Y0.2O3−δ electrolyte and Sm0.5Sr0.5CoO3&minus...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

A self-etched template method to prepare CHS@MoS2 hollow microspheres for lithium-ion storage
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Laiying Jing, Gang Lian, Shenghui Han, Junwei Sun, Chaoyang Sun, Qilong Wang, Haihui Jiang, Deliang CuiAbstractA self-etched template method was developed to prepare CHS@MoS2 hollow microspheres. They are composed of thin-layered MoS2 nanosheets radially growing on the surfaces of carbon hollow spheres. The electrical conductivity of the composite can be obviously impoved, which is favorable for electron transport in the electrochemical reaction process. The hollow and thin-layered nanostructures can enhance the ion diffusion i...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Versatile deep-red Mg2TiO4:Mn4+ phosphor for photoluminescence, thermometry, and latent fingerprint visualization
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Su-Hua Yang, Ying-Che Hung, Po-Chang Tseng, Hwa-Yu LeeAbstractThe deep-red multifunctional Mg2TiO4:Mn4+ phosphor was synthesized for photoluminescence (PL), thermometry, and latent fingerprint visualization applications. Phosphors synthesized using a solid-state reaction (SSR) were composed of a binary phase consisting of 67.4% Mg2TiO4 and 32.6% MgTiO3. In addition, a single-phase Mg2TiO4 phosphor was prepared using a citric-acid-assisted sol-gel process, which exhibited a 2.24-fold PL enhancement compared to the phosphor prepa...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Facile situ synthesis of C@SnO2/Sn@rGO hybrid nanosheets as high performance anode materials for lithium-ion batteries
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Weiming Su, Yue Liang, Yuefeng TangAbstractC@SnO2/Sn@rGO hybrid nanosheets are successfully synthesized via a situ method of SnO2@rGO precursors which are prepared by a facile hydrothermal reaction. The C@SnO2/Sn@rGO hybrid nanosheets are composed of carbon layer, rGO, SnO2 and reduction Sn which are generated in carbonization process of poly-dopamine layer. The amount of Sn in C@SnO2/Sn@rGO hybrid nanosheets can be adjusted by changing the carbonization time. The as prepared materials, especially the C@SnO2/Sn@rGO-1 sample, sh...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Opto-electronic properties of Co-Zn-Ni-O films deposited by RF-sputtering at ambient-temperature
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): J.C. Ford, A. Zakutayev, P.F. Ndione, A.K. Sigdel, N.E. Widjonarko, P.A. Parilla, B. Van Zeghbroeck, J.J. Berry, D.S. Ginley, J.D. PerkinsAbstractCo-Zn-Ni-O thin films were grown on glass at ambient temperature (TS 
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Excellent mechanical properties obtained by low temperature extrusion based on Mg-2Zn-1Al −0.2Mn-0.2Ca-0.2Gd alloy
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Yanxia Niu, Zetian Song, Qichi Le, Jian Hou, Fangkun NingAbstractA newly developed low Al containing magnesium alloy, Mg-2Zn-1Al-0.2Mn-0.2Ca-0.2Gd (wt.%) shows excellent mechanical properties. The alloys with superior high strength and considerable ductility (the maximum of tensile strength reaches 332 MPa and corresponding elongation is 23.1%) were produced by electromagnetic casting and extrusion at relatively low temperatures (110 °C, 170 °C, 210 °C, and 250 °C) with an extrusion ratio of 17.4:1. Ef...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Microstructure and corrosion behaviour of NiCo-Carbon nanotube composite coatings
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Sweety Arora, Nikita Kumari, Chandan SrivastavaAbstractMicrostructure-corrosion property correlation in electrodeposited NiCo-carbon nanotube (NiCo-CNT) composite coatings has been explored. NiCo-CNT composite coatings were electrodeposited over mild steel substrate by dispersing different amounts of CNTs into the electrolyte bath. CNTs were synthesized by the chemical vapor deposition (CVD) method. Morphological characterization revealed crack free morphology for all the coatings. The coating morphology progressively became fi...
Source: Journal of Alloys and Compounds - June 18, 2019 Category: Chemistry Source Type: research

Corrigendum to “Effects of energy input during friction stir processing on microstructures and mechanical properties of aluminum/carbon nanotubes nanocomposites” [J. Alloy. Comp. 798 (2019) 523–530]
Publication date: Available online 16 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Shuai Zhang, Gaoqiang Chen, Jinquan Wei, Yijun Liu, Ruishan Xie, Qu Liu, Shenbo Zeng, Gong Zhang, Qingyu Shi (Source: Journal of Alloys and Compounds)
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Evidence of multiband behavior in a new superconductor Ta0.8Zr0.2B with FeB-prototype structure
We present results that show a relation between crystalline structure and superconductivity in the Ta1-xZrxB system. The substitution of Ta for Zr atoms induces a crystal structure change from CrB- to FeB-prototype structure in which superconductivity is present with higher superconducting critical temperature Tc. The interrelation between Tc and Zr content shows a dome-like behavior with maximum Tc at x = 0.2. In this sample, bulk superconductivity was observed and characterized by magnetization, electrical resistivity and specific heat measurements, all consistent with a superconducting critical temperature close to ...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Pressure tuning of octahedral tilt in the ordered double perovskite Pb2CoTeO6
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Lei Liu, Sergey Ivanov, Roland Mathieu, Matthias Weil, Xiaodong Li, Peter LazorAbstractDouble perovskites represent a family of materials with promising fundamental properties (e.g. multiferroicity) and vast potential applications. However, the knowledge of pressure effects on the crystal structure of double perovskite is limited, which hinders their efficient synthesis using high-pressure techniques. Pb2CoTeO6 (PCTO) is considered as a good candidate for multiferroic materials, although a polymorph with a polar structure has n...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Structural and electronic properties of neutral, anionic, and cationic M13(0, ±1) and M12Al(0, ±1) (M=Ga, Ge, In, Sn, and Sb) from density functional theory
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Shunping Shi, Chuanyu Zhang, Yiliang Liu, Min Yan, Xiaofeng Zhao, Gang Jiang, Yong LiAbstractUsing density functional theory (DFT), we discuss the structures of neutral, anionic, cationic d10 configuration clusters (Ga, Ge, In, Sn and Sb) and Al doping neutral, anionic, cationic d10 configuration clusters that contain 13 atoms. By calculating, the lowest energy geometries of M13(0, ±1) and M12Al(0, ±1) clusters (M = Ga, Ge, In, Sn and Sb) are determined. It is found that the most stable structures of the M12Al...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Formation and mechanical properties of a Zr73Al8Cu6Ni13 bulk metallic glass composite containing in-situ beta-Zr dendrites
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Yanhui Li, Wei ZhangAbstractThe variations of structure and mechanical properties with sample diameter (d) for ZrAlCuNi alloys containing a high Zr content of 73 at.% were investigated. A Zr73Al8Cu6Ni13 alloy forms a single glassy phase with a d of 1.0 mm and changes to a composite of β-Zr dendrites dispersing homogeneously in metallic glass matrix when the d increases to 1.5–3.0 mm. The Zr73Al8Cu6Ni13 bulk metallic glass composites (BMGCs) exhibit high compressive plastic strain of over 35% without final failu...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Spectroscopic investigation of new manganese tellurite glasses synthesized by sol-gel method
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Adriana Dehelean, Adriana Popa, Simona Rada, Ramona Crina Suciu, Manuela Stan, Eugen CuleaAbstractNew tellurite glasses of the xMnO(100-x)TeO2 system with x = 0–26.2 mol % were prepared by sol-gel method. X-ray diffraction and FTIR, UV–Vis, electron paramagnetic resonance (EPR) and photoluminescence (PL) spectroscopies were used to investigate the structural and behavioural properties of the samples. X-ray analysis confirms the amorphous nature of samples. FTIR spectra reveal the presence of TeO3, TeO4 and TeO...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Study on nanostructured MgH2 with Fe and its oxides for hydrogen storage applications
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): D. Mirabile Gattia, M. Jangir, I.P. JainAbstractMagnesium hydride is one of the most suitable candidates for hydrogen storage due to completely reversible hydrogen storage reactions. Moreover magnesium is a widespread element on the earth. In this work the preparation of nanostructured magnesium hydride has been realized by mechanical milling under inert gas in presence of iron and its oxides. The work presents a complete comparison between Fe and its oxides as catalyst for sorption kinetics. Fe is a suitable catalyst for hydro...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Synthesis of Co2P nanoparticles decorated nitrogen, phosphorus Co-doped Carbon-CeO2 composites for highly efficient oxygen reduction
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Xiaoqing Wang, Jijian Xu, Mingjia Zhi, Zhanglian Hong, Fuqiang HuangAbstractThe oxygen reduction reaction is an important cathode reaction, thus seeking for low cost and high activity catalysts is highly demanded. Herein, a ternary catalyst composed of Co2P nanoparticles, N and P co-doped carbon (NPC) and CeO2 nanosheets (Co2P-NPC-CeO2) is reported for efficient oxygen reduction. In such composite, CeO2 nanosheets are coated with a carbon layer derived from dopamine, and then decorated with Co2P nanoparticles by using phytic ac...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Synthesis of 1-D iron oxide nano-sticks: Tuning the interfacial defects and surface of nano-sticks for fine-tuned exchange biasing
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Hessan Khalid, Sung G. Heo, Won S. Yang, Bum S. Kim, Taek-Soo Kim, Seok-Jun SeoAbstractExchange biasing in single-phase nanoparticles rely highly upon the interface of the nano-particles, which can accommodate uncompensated spins and defects on their surface. Herein, we report the synthesis of high aspect ratio akaganeite nano-sticks with 2.2 ± 0.15 μm in length and 116 ± 20 nm in diameter by understanding various kinetics parameters within the system. By stabilizing the longer length 1-D symmetry, ...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Influence of sintering environment on the spark plasma sintering of Maxthal 312 (nominally-Ti3SiC2) and the role of powder particle size on densification
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Carl Magnus, William M. RainforthAbstractHerein, we report on the synthesis of Ti3SiC2 via the Maxthal 312 (nominally-Ti3SiC2) commercial powder route using spark plasma sintering (SPS). The SPSed bulk samples contained ancillary phases (TiCX and TiSi2) irrespective of the sintering environment as confirmed by XRD phase analysis. The optimum sintering temperature below which intrinsic decomposition starts appears to be ∼1350 °C in vacuum and ∼1450 °C in argon atmosphere, respectively. The role of powder part...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Towards micro- and nanostructured AlZnCu alloys cast from commercial-purity metals
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): P.K. Krajewski, L. Rogal, M. Faryna, A.L. Greer, W.K. KrajewskiAbstractStructural and composition modification of high-zinc aluminum alloys refines their microstructural scale from a few millimeters to a few micrometers. In a series of studies, high-aluminum Al–30Zn alloys were doped with (2–20) wt.% Cu, 1 wt% Mn and small (∼100 ppm) Ti addition. The alloys’ microstructure has been studied using SEM/EBSD (scanning electron microscopy/electron backscatter diffraction) and LM (light microscopy) technique...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Mg2Si-based thermoelectric compounds with enhanced fracture toughness by introduction of dual nanoinclusions
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Gwansik Kim, Hyun Jun Rim, Hwijong Lee, Jeongmin Kim, Jong Wook Roh, Kyu Hyoung Lee, Wooyoung LeeAbstractDual nanoinclusions of reduced graphene oxides (rGOs) and metal nanoparticles (NPs) were introduced into Al and Bi co-doped Mg2Si thermoelectric (TE) compounds to enhance their fracture toughness (∼0.82 MPa m1/2 for pristine Mg1.96Al0.04Si0.97Bi0.03). The TE performance of Mg1.96Al0.04Si0.97Bi0.03 decreased by the introduction of nanoscale inclusions, mainly owing to the deterioration of the electronic transport prop...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Growth and properties of AlSbBi thin films by molecular beam epitaxy
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Xiaolei Zhang, Yanchao Zhang, Li Yue, Hao Liang, Chaodan Chi, Yufeng Wu, Xin Ou, Shumin WangAbstractAlSbBi thin films with a Bi content up to 15% have been successfully grown by molecular beam epitaxy for the first time. The effect of growth temperature, Sb flux and Bi flux on Bi incorporation are systematically studied. The incorporation of small size Al atoms is proven to be beneficial to improve the stability of AlSbBi with no change of Bi content in the growth temperature range of 360–420 °C. The AlBi lattice co...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Negative Coriolis effect in piezoelectric metamaterials
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Longlong Shu, Yanzhuo Yu, Zehui Yong, Zhenggang Rao, Shanming Ke, Linfeng Fei, Shaohua Zhang, Yu WangAbstractCoriolis effect, regarded as one of the universal physical law, describes the phenomenon that an arbitrary object will deflect left relative to the original speed when the object is laid on a reference frame with clockwise rotation, and vice versa. In this Letter, we designed a specialized piezoelectric metamaterial which is consist of a piezoelectric sensing element, an elastic rubber, and a mass element by using the fi...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Research on thermoplastic formability and nanomoulding mechanism of lightweight Ti-based bulk metallic glasses
In this study, alloying method was adopted to improve the thermoplastic formability of a lightweight Ti–Zr–Be bulk metallic glass (BMG). Different combinations of alloying elements, alloying routes and alloying contents have been tried to optimize the alloy composition. S parameter was found to be an effective indicator for evaluating the thermoplastic formability of the studied Ti-based bulk metallic glasses. A Ti45Zr20Be30Fe5 alloy, which possesses unique thermoplastic formability, has been successfully developed. A nanomoulding processing map for Ti45Zr20Be30Fe5 alloy has been constructed. To reduce the capi...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

A systematic approach to ZnO nanoparticle-assisted electron transport bilayer for high efficiency and stable perovskite solar cells
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Sung-Nam Kwon, Jae-Hun Yu, Seok-In NaAbstractMinimizing the interface loss of perovskite solar cells is critical to achieving high photovoltaic performance, and intensive research is underway on interfacial engineering in this regard. In this work, we introduce a ZnO nanoparticles (ZnO NPs) interlayer between phenyl-C61-butyric acid methyl ester (PCBM) and a metal electrode in order to reduce the interface loss due to charge recombination and device degradation, and also investigate the dependence of device performance on the t...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Effect of discharge power and silicon content on optical and mechanical properties of carbon-rich amorphous silicon carbide films obtained by PECVD
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Anatolii N. Lukianov, Nickolai I. Klyui, Bo Sha, Volodymyr B. Lozinskii, Volodymyr P. Temchenko, Liubov V. Avksentyeva, Vasyl S. StaschukAbstractWe studied optical and mechanical properties of a-SixC1-x:H films prepared by the PECVD technique from the mixture of CH4, SiH4, H2 and Ar. RF discharge power and silane flow rate were chosen as parameters of the film deposition process that allowed to vary film properties. It was shown that variations of silane flow rate (10, 20 sccm) and discharge power in the 100–300 W range...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Activating persistent luminescence and thermal stability of K2Ba7Si16O40: Eu2+ via traps modulation
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Haijie Guo, Yuhua Wang, Gen Li, Peng Feng, Dongwei Liu, Qiangfei YeAbstractHerein, using K2Ba7Si16O40 as a host, we achieved strong cyan persistent luminescence (PersL) through codoping Eu2+ and Nd3+ ions. In comparison with Eu2+ ions single doped sample, the initial PersL intensity and duration of Nd3+ ions co-doped sample (in which Eu2+ and Nd3+ concentration was optimized to be 0.015 mol) were discovered to be 4.8 times stronger and 6.5 times longer, respectively. The PersL duration of which above 0.32 mcd m-2 sustained ...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

The prominent combination of ultrahigh strength and superior tensile plasticity in Cu–Zr nanoglass connected by oxide interfaces: A molecular dynamics study
Publication date: 15 September 2019Source: Journal of Alloys and Compounds, Volume 801Author(s): Mao Zhang, Qiao-Min Li, Jia-Cheng Zhang, Guang-Ping Zheng, Xin-Yun WangAbstractA novel Cu–Zr nanoglass consisting of glassy nano-cells connected by oxide interfaces is proposed. Compared to conventional nanoglasses, the novel oxide-connected nanoglass presents ultrahigh tensile strength and superior tensile plasticity at ambient temperature. Subjected to tensile loading, the oxide interfaces are found to promote the nucleation of shear transformation zones (STZs) due to the existence of excess free volume. Meanwhile, the ...
Source: Journal of Alloys and Compounds - June 17, 2019 Category: Chemistry Source Type: research

Microstructures and mechanical properties of HfNbTaTiZrW and HfNbTaTiZrMoW refractory high-entropy alloys
Publication date: Available online 12 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Meng Wang, Zhaolong Ma, Ziqi Xu, Xingwang ChengAbstractW and Mo are added to the HfNbTaTiZr high entropy alloy to improve its high-temperature performance. Microstructures, and mechanical properties of new refractory high-entropy alloys, HfNbTaTiZrW (H-W) and HfNbTaTiZrMoW (H-MoW), were studied. W and/or Mo additions broaden the two-phases temperature range and introduced two disordered BCC phases in contrast with the single BCC phase in HfNbTaTiZr. Attributing to the dual-phases microstructure and the strong solid solution str...
Source: Journal of Alloys and Compounds - June 16, 2019 Category: Chemistry Source Type: research

Positive effects of calcium-doping on the cathode performance of layered perovskite Eu1-xCaxBaCo2O5+δ for intermediate-temperature solid oxide fuel cells
Publication date: Available online 12 June 2019Source: Journal of Alloys and CompoundsAuthor(s): Wanbo Xiang, Jingping Wang, Shuli Li, Tian Xia, Guixiang WangAbstractA stable cathode with high catalytic activity toward oxygen reduction reaction (ORR) plays a key role in the commercialization of solid oxide fuel cells (SOFCs). Herein a series of layered perovskite oxides, Eu1-xCaxBaCo2O5+δ (x = 0–0.2), are synthesized and systematically evaluated as potential cathode materials for intermediate-temperature SOFCs (IT-SOFCs). The positive effects of calcium-doping on the cathode performance are confirmed by mea...
Source: Journal of Alloys and Compounds - June 16, 2019 Category: Chemistry Source Type: research