Effect of phase-separated patterns on the formation of core-shell structure
Publication date: Available online 25 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Yinli Peng, Nan WangAbstractRevealing the mechanisms of self-organized core-shell (C-S) structure in immiscible systems has drawn considerable attentions, however, the further and fundamental understanding from the point of view of phase-separated pattern remains extremely rare. In this work, by realizing two phase-separated patterns in transparent immiscible system, namely nucleation-growth and spinodal decomposition, their effects on radius of minority-phase droplet (MPD) were examined, and subsequently the...
Source: Journal of Materials Science and Technology - September 26, 2019 Category: Materials Science Source Type: research

(Y0.25Yb0.25Er0.25Lu0.25)2(Zr0.5Hf0.5)2O7: A defective fluorite structured high entropy ceramic with low thermal conductivity and close thermal expansion coefficient to Al2O3
Publication date: Available online 26 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Zifan Zhao, Heng Chen, Huimin Xiang, Fu-Zhi Dai, Xiaohui Wang, Wei Xu, Kuang Sun, Zhijian Peng, Yanchun Zhou (Source: Journal of Materials Science and Technology)
Source: Journal of Materials Science and Technology - September 26, 2019 Category: Materials Science Source Type: research

Static and cyclic oxidation of Nb-Cr-V-W-Ta high entropy alloy in air from 600 to 1400°C
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): S.K. Varma, Francelia Sanchez, Sabastian Moncayo, C.V. RamanaAbstractAn oxidation resistance study has been made on Nb-Cr-V-W-Ta high entropy alloy in a range of temperature from 600 to 1400 °C in air. Static oxidation study has been performed for either (a) 12 or 24 hours of heating time or (b) 3 or 10 °C/min heating rates to the desired oxidation temperature. Cyclic oxidation study conducted for three and a half days has been conducted at 600, 700, and 800 °C using 12...
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

Effects of strain state and slip mode on the texture evolution of a near-α TA15 titanium alloy during hot deformation based on crystal plasticity method
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Jie Zhao, Liangxing Lv, Kehuan Wang, Gang LiuAbstractA thorough understanding of the texture evolution of near-α titanium alloys during the hot metal forming can help obtain an optimal crystallographic texture and material performance. The strain state has an obvious effect on the texture evolution of near-α titanium alloys during the hot metal forming. In this paper, the texture evolution of a near-α TA15 titanium alloy during the hot metal forming under different strain states were discuss...
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

Visible-light responsive organic nano-heterostructured photocatalysts for environmental remediation and H2 generation
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Yingzhi Chen, Dongjian Jiang, Zhengqi Gong, Qinglin Li, Ranran Shi, Zexi Yang, Ziyi Lei, Jingyuan Li, Lu-Ning WangAbstractThe ease of molecular design and functionalization make organic semiconductors (OSCs) unit the electronic, chemical and mechanical benefits with a material structure. The easily tunable optoelectronic properties of OSCs also make it promising building blocks and thereby provide more possibilities in photocatalytic applications. So far, organic nanostructures have gained great impetus and f...
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

Excellent reusability of FeBC amorphous ribbons induced by progressive formation of through-pore structure during acid orange 7 degradation
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Fang Miao, Qianqian Wang, Qiaoshi Zeng, Long Hou, Tao Liang, Zhiqiang Cui, Baolong ShenAbstractThe high-efficient degrading ability of FeBC amorphous ribbons toward acid orange 7 (AO7) via redox reactions is reported and compared with that of FePC amorphous ribbons. The time required for degrading 50% of AO7 using FeBC amorphous ribbons is only 1/3 of that using FePC amorphous ribbons. In the FeBC amorphous matrix, galvanic cell structures are formed between the Fe-B and Fe-C bonds because of the large differ...
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

On the nature of a peculiar initial yield behavior in metastable β titanium alloy Ti-5Al-5Mo-5V-3Cr-0.5Fe with different initial microstructures
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Jiangkun Fan, Zhixin Zhang, Puyi Gao, Ruimeng Yang, Huan Li, Bin Tang, Hongchao Kou, Yudong Zhang, Claude Esling, Jinshan LiAbstractThe compressive yielding phenomenon of titanium alloys is not as focused and sufficiently ascertain as the tensile yielding phenomenon. In the present work, the peculiar compressive yielding behavior and the different dynamic responses of three different initial microstructures (single β, clavate α and lamellar α) were investigated in an attractive metastable &be...
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

Solidification microstructure of Cr4Mo4V steel forged in the semi-solid state
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Weifeng Liu, Yanfei Cao, Yifeng Guo, Mingyue Sun, Bin Xu, Dianzhong LiAbstractSemi-solid forging of iron-based alloys during solidification has unique characteristics distinct from those of the classical hot forging. With the aim of acquiring precise knowledge concerning the microstructural evolution of bearing steel Cr4Mo4V in this process, a series of semi-solid forging experiments were carried out in which samples were wrapped in a designed pure iron sheath. The effects of forging temperature and forging r...
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

Deciphering deformation mechanisms of hierarchical dual-phase CrCoNi coatings
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): S.J. Tsianikas, Y. Chen, Z. XieAbstractHierarchical CrCoNi medium entropy alloy (MEA) thin films with a dual-phase face-centred cubic (FCC) and hexagonal closed-packed (HCP) nanostructure were prepared on M2 steel substrates by closed field unbalanced magnetron sputtering. Nanoindentation tests show an ultra-high hardness of 9.5 GPa, attributable to large amounts of innate planar defects (i.e., growth twins and stacking faults) impeding dislocation motion in the coatings. A deep analysis of undeformed ...
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

Effect of reaction routes on the porosity and permeability of porous high entropy (Y0.2Yb0.2Sm0.2Nd0.2Eu0.2)B6 for transpiration cooling
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Heng Chen, Zifan Zhao, Huimin Xiang, Fu-Zhi Dai, Jie Zhang, Shaogang Wang, Jiachen Liu, Yanchun Zhou (Source: Journal of Materials Science and Technology)
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

Facile fabrication of core-shell Ni3Se2/Ni nanofoams composites for lithium ion battery anodes
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Zhongren Wang, Quanbin Gao, Peng Lv, Xiuwan Li, Xinhui Wang, Baihua QuAbstractDue to the highly porous structure, large specific surface area, and 3D interconnected metal conductive network, nanoporous metal foams have attracted a lot of attention in the field of energy conversion and storage, especially lithium-ion batteries, which are ideal for current collectors. In this work, we develop a facile approach to fabricate core-shell Ni3Se2/Ni nanofoams composites. The Ni3Se2/Ni composites make full use of both...
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

Pesticide-induced photoluminescence quenching of ultra-small Eu3+-activated phosphate and vanadate nanoparticles
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Jovana Periša, Željka Antić, Chong-Geng Ma, Jelena Papan, Dragana Jovanović, Miroslav D. DramićaninAbstractThe aim of this research was to investigate the luminescent behavior of ultra-small Eu3+-activated phosphate and vanadate nanoparticles in the presence of pesticides. Nanoparticles have an average diameter of approximately 2 nm with a narrow size distribution. The monazite crystal structure of phosphate-based particles (space group P121/m1) and single tetragonal zircon-type structure of...
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

Rejuvenated metallic glass strips produced via twin-roll casting
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Long Zhang, Yi Wu, Shidong Feng, Wen Li, Hongwei Zhang, Huameng Fu, Hong Li, Zhengwang Zhu, Haifeng ZhangAbstractThe energy state and atomic level structure of metallic glasses (MGs) are very sensitive to their cooling rates, and a lower cooling rate generally causes a lower energy and more relaxed state of MGs. In this work, the Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit. 1) ribbons with a thickness of 40 μm and 110 μm and the strips with a thickness of 320 μm and 490 μm were p...
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

Pressure-driven mold filling model of aluminum alloy melt/semi-solid slurry based on rheological behavior
Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Zhen Ma, Huarui Zhang, Wei Song, Xiaoyan Wu, Lina Jia, Hu ZhangAbstractThe pressure-driven mold filling ability of aluminum alloy melt/semi-solid slurry is of great significance in pressure casting processes, and the rheological behavior of the alloy has a crucial effect on the mold filling ability according to fluid dynamics. In this work, a pressure-driven mold filling model is first proposed based on the rheological behavior of the alloys. A356 alloy is employed as an example to clarify the rheological beh...
Source: Journal of Materials Science and Technology - September 22, 2019 Category: Materials Science Source Type: research

A controllable soft-templating approach to synthesize mesoporous carbon microspheres derived from D-xylose via hydrothermal method
Publication date: Available online 19 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Jian Su, Changqing Fang, Mannan Yang, Youliang Cheng, Zhen Wang, Zhigang Huang, Caiyin YouAbstractHighly dispersed carbon microspheres (CMSs) derived from D-xylose were successfully synthesized under hydrothermal conditions and followed by further carbonization, in which F127 was used as a soft template. As-synthesized products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), flourier transform infrared spectroscopy (FT-IR), thermal gravimetric (TG) and X-ray d...
Source: Journal of Materials Science and Technology - September 20, 2019 Category: Materials Science Source Type: research

How does anodization time affect morphological and photocatalytic properties of iron oxide nanostructures?
Publication date: Available online 19 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Bianca Lucas-Granados, Rita Sánchez-Tovar, Ramón M. Fernández-Domene, José María Estívalis-Martínez, José García-AntónAbstractIron oxide nanostructures are promising materials to be used as photocatalysts in different photoelectrochemical applications. There are different techniques in order to synthesize these nanostructures, but one of the most inexpensive and simple method is electrochemical anodization. This method can lead to different...
Source: Journal of Materials Science and Technology - September 20, 2019 Category: Materials Science Source Type: research

Investigation of solar-induced photoelectrochemical water splitting and photocatalytic dye removal activities of camphor sulfonic acid doped polyaniline -WO3- MWCNT ternary nanocomposite
Publication date: Available online 19 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Mir Ghasem Hosseini, Pariya Yardani Sefidi, Ahmet Musap Mert, Solen KinayyigitAbstractThe camphor sulfonic acid doped polyaniline-WO3-multiwall carbon nanotube (CSA PANI-WO3-CNT) ternary nanocomposite was synthesized during in-situ oxidative polymerization and characterized by Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), Transmission electron microscopy (TEM), and Energy...
Source: Journal of Materials Science and Technology - September 20, 2019 Category: Materials Science Source Type: research

Microstructure evolution, Cu segregation and tensile properties of CoCrFeNiCu high entropy alloy during directional solidification
Publication date: Available online 19 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Huiting Zheng, Ruirun Chen, Gang Qin, Xinzhong Li, Yanqing Su, Hongsheng Ding, Jingjie Guo, Hengzhi FuAbstractCoCrFeNiCu (equiatomic ratio) samples (ø 8 mm) were directionally solidified at different velocities (10, 30, 60 and 100 µm/s) to investigate the relationship between solidification velocity and microstructure formation, Cu micro-segregation as well as tensile properties. The results indicate that the morphology of the solid-liquid (S-L) interface evolves from convex to planar and then to...
Source: Journal of Materials Science and Technology - September 20, 2019 Category: Materials Science Source Type: research

Exploring water and ion transport process at silicone/copper interfaces using in-situ electrochemical and Kelvin probe approaches
Publication date: Available online 19 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): B. Munirathinam, J.P.B. van Dam, A. Herrmann, W.D. van Driel, F. De Buyl, S.J.F. Erich, L.G.J. van der Ven, O.C.G. Adan, J.M.C. MolAbstractIn general, packaging materials which encapsulate light emitting diodes (LEDs) and microelectronic devices offer barrier protection against several environmental hazards such as water and ionic contaminants. However, these encapsulants may provide pathways for water and ionic contaminants to reach the metal/polymer interfaces and provoke local corrosion of electronics, whi...
Source: Journal of Materials Science and Technology - September 20, 2019 Category: Materials Science Source Type: research

Optimization of <001> grain gene based on texture hereditary behavior of magnetic materials
Publication date: Available online 19 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Mengcheng Zhou, Xinfang ZhangAbstractSince the intrinsic properties of materials are determined by the properties and arrangement of atoms, including crystal structure and defects, there is a strong analogy between material genes and biological genes. Therefore, improving the performance of materials by optimizing their genes is a new idea of material upgrading. The orientation texture is closely related to the magnetic properties of soft magnetic materials. We designed and experimentally demonstrated a gene ...
Source: Journal of Materials Science and Technology - September 20, 2019 Category: Materials Science Source Type: research

Surface/interface engineering of noble-metals and transition metal-based compounds for electrocatalytic applications
Publication date: Available online 17 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Mengmeng Zhang, Xiaopeng Li, Jun Zhao, Xiaopeng Han, Cheng Zhong, Wenbin Hu, Yida DengAbstractSurface/interface engineering plays an important role in improving the performance and economizing the cost and usage of electrocatalysts. In recent years, substantial progress has been achieved in designing and developing highly active electrocatalysts with the deepening understanding of surface and interface enhanced mechanism. In this review, recent development about optimizing the surface and interfacial structur...
Source: Journal of Materials Science and Technology - September 18, 2019 Category: Materials Science Source Type: research

Direct patterning of reduced graphene oxide/graphene oxide memristive heterostructures by electron-beam irradiation
Publication date: Available online 11 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Olesya O. Kapitanova, Evgeny V. Emelin, Sergey G. Dorofeev, Gennady N. Panin, Youngmin Lee, Sejoon LeeAbstractMemristive heterostructures, composed of reduced graphene oxide with different degree of reduction, were demonstrated through a simple method of ‘direct electron-beam writing’ on graphene oxide. Irradiation with an electron beam at various doses and accelerating voltages made it possible to define high- and low-conductivity graphene-oxide areas. The electron beam-reduced graphene oxide/gra...
Source: Journal of Materials Science and Technology - September 12, 2019 Category: Materials Science Source Type: research

Age hardening responses of as-extruded Mg-2.5Sn-1.5Ca alloys with a wide range of Al concentration
This article aims to explore the age hardening responses of both as-extruded and as-aged Mg-2.5Sn-1.5Ca-xAl alloys (x = 2.0, 4.0 and 9.0 wt%, termed TXA322, TXA324 and TXA329, respectively) through microstructural and mechanical characterization. Results indicate that grain size of as-extruded TXA322, TXA324 and TXA329 alloys were ∼ 16 μm, ∼ 10 μm and ∼ 12 μm, respectively. A number of and dislocations were observed in all the as-extruded samples. Guinier – Preston (GP) zones were evidently identified in TXA322 alloy, while only a small number of Mg17Al12...
Source: Journal of Materials Science and Technology - September 12, 2019 Category: Materials Science Source Type: research

Synthesis and characterization of nanosized Ti3AlC2 ceramic powder by elemental powders of Ti, Al and C in molten salt
Publication date: Available online 10 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Huijun Liu, Ying Wang, Lingxu Yang, Ruijia Liu, Chaoliu ZengAbstractA simple method to synthesize high-content ternary carbide Ti3AlC2 nanoparticles from Ti, Al, and C starting elemental powders without ball milling in NaCl‒KCl molten salt was reported. The effects of mass ratio of the salt to starting materials, temperature, reaction time, and Al molar ratio on preparation of Ti3AlC2 were investigated. The Ti3AlC2 formation is dramatically influenced by temperature and mass ratio of the salt to raw materia...
Source: Journal of Materials Science and Technology - September 12, 2019 Category: Materials Science Source Type: research

Improved formaldehyde gas sensing properties of well-controlled Au nanoparticle-decorated In2O3 nanofibers integrated on low power MEMS platform
Publication date: Available online 10 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Dongha Im, Donghyun Kim, Dasol Jeong, Woon Ik Park, Myoungpyo Chun, Joon-Shik Park, Hyunjung Kim, Hyunsung JungAbstractApproaches for the fabrication of a low power-operable formaldehyde (HCHO) gas sensor with high sensitivity and selectivity were performed by the utilization of an effective micro-structured platform with a micro-heater to reach high temperature with low heating power as well as by the integration of indium oxide (In2O3) nanofibers decorated with well-dispersed Au nanoparticles as a sensing m...
Source: Journal of Materials Science and Technology - September 12, 2019 Category: Materials Science Source Type: research

Synchronous optimization of strength, ductility and corrosion resistance of bulk nanocrystalline 304 stainless steel
Publication date: Available online 10 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): S.G. Wang, M. Sun, S.Y Liu, X. Liu, Y.H. Xu, C.B. Gong, K. Long, Z.D. ZhangAbstractStructural materials usually suffer from several attacks during their service, such as tension, fatigue and corrosion. It is necessary to synchronously improve these properties for their lightweight and long-lifetime, but corrosion resistance and ductility are generally inverse correlation with strength, it is very difficult to simultaneously optimize all three properties. However, bulk nanocrystalline 304 stainless steel (BN-3...
Source: Journal of Materials Science and Technology - September 12, 2019 Category: Materials Science Source Type: research

In-situ Synthesis of Nanocrystalline TiC powders, Nanorods, and Nanosheets in Molten Salt by disproportionation reaction of Ti(II) Species
Publication date: Available online 10 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Lingxu Yang, Ying Wang, Ruijia Liu, Huijun Liu, Xue Zhang, Chaoliu Zeng, Chao FuAbstractA high-efficiency method is developed to in-situ synthesize nanocrystalline TiC powders, nanorods, and nanosheets by using equimolar ratio of Ti powder and acetylene black, multiwalled carbon nanotubes (MWCNTs), and graphene, respectively, as precursor in eutectic NaCl-KCl molten salt at 800-900 °C for 2-3 h. Higher temperature and longer duration are more beneficial for TiC preparation. In addition, mech...
Source: Journal of Materials Science and Technology - September 12, 2019 Category: Materials Science Source Type: research

Structural defects in MAX phases and their derivative MXenes: A look forward
Publication date: Available online 10 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Hui Zhang, Tao Hu, Xiaohui Wang, Yanchun ZhouAbstractMAX phases and corresponding 2D derivative MXenes have attracted considerable interests due to not only their fascinating mechanical, physical and chemical properties but also their unique atomically laminated structures. As the most important way to tailor the materials properties, the structural defects in MAX phases and MXenes have been extensively investigated but lack of systematic survey although six reviews and two books in this field have been publi...
Source: Journal of Materials Science and Technology - September 12, 2019 Category: Materials Science Source Type: research

Effects of external field treatment on the electrochemical behaviors and discharge performance of AZ80 anodes for Mg-air batteries
Publication date: Available online 10 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Xingrui Chen, Shaochen Ning, Qichi Le, Henan Wang, Qi Zou, Ruizhen Guo, Jian Hou, Yonghui Jia, Andrej Atrens, Fuxiao YuAbstractIn this work, the effects of external field treatment on electrochemical behaviors and discharge performance of as-cast Mg-8%Al-0.5%Zn (wt%) anodes for Mg-air batteries are systematically investigated in 3.5 wt% NaCl solution. The external field treatment particularly the variable-frequency ultrasonic field can dramatically refine the α-Mg grains and β phases. The gr...
Source: Journal of Materials Science and Technology - September 12, 2019 Category: Materials Science Source Type: research

Synergetic effect of graphene and Co(OH)2 as cocatalysts of TiO2 nanotubes for enhanced photogenerated cathodic protection
Publication date: Available online 5 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Xiayu Lu, Li Liu, Xuan Xie, Yu Cui, Emeka E. Oguzie, Fuhui WangAbstractA layer of graphene (GR) particles was successfully deposited at the interface between Co(OH)2 nanoparticles and TiO2 nanotubes, aiming to improve the photoelectrochemical performance of the large-bandgap semiconductor TiO2. The obtained Co(OH)2/GR/TiO2 was extensively characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-visible absor...
Source: Journal of Materials Science and Technology - September 6, 2019 Category: Materials Science Source Type: research

Transfer-free CVD graphene for highly sensitive glucose sensors
Publication date: Available online 5 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Shijing Wei, Yabin Hao, Zhe Ying, Chuan Xu, Qinwei Wei, Sen Xue, Hui-Ming Cheng, Wencai Ren, Lai-Peng Ma, You ZengAbstractChemical vapor deposition (CVD) graphene film is a promising electrode-modifying material for fabricating high-performance glucose sensor due to its high electrical conductivity and two-dimensional structure over large area. However, the use of typical metal-based CVD graphene suffers from the residue contamination of polymer transfer-support and heavy metal ions. In this work, we directly ...
Source: Journal of Materials Science and Technology - September 6, 2019 Category: Materials Science Source Type: research

Enhancement of Hydroxyapatite Dissolution through Structure Modification by Krypton Ion Irradiation
We examined the effects of irradiation on the early stages of the mouse osteoblast-like cells (MC3T3-E) response. A cell counting kit-8 assay (CCK-8 test) was carried out to investigate the cytotoxicity of samples, and viable cells can be observed on the irradiated materials. (Source: Journal of Materials Science and Technology)
Source: Journal of Materials Science and Technology - September 6, 2019 Category: Materials Science Source Type: research

Dual effect of Cu on the Al3Sc nanoprecipitate coarsening
Publication date: Available online 5 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Y.H. Gao, L.F. Cao, J. Kuang, J.Y. Zhang, G. Liu, J. SunAbstractIt is generally considered that the Al3Sc nanoprecipitates are highly thermal stable, mainly due to quite slow Sc diffusion in the α-Al matrix. In this paper, we demonstrate in an Al-Cu-Sc alloy that the Cu atoms have dual effect on the coarsening of Al3Sc nanoprecipitates. On the one hand, the Cu atoms with high diffusivity tend to accelerate the Al3Sc coarsening, which results from the Cu-promoted Sc diffusion. On the other hand, some Cu a...
Source: Journal of Materials Science and Technology - September 6, 2019 Category: Materials Science Source Type: research

Hydrophobic epoxy resin coating with ionic liquid conversion pretreatment on magnesium alloy for promoting corrosion resistance
Publication date: Available online 5 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Liting Guo, Changdong Gu, Jie Feng, Yongbin Guo, Yuan Jin, Jiangping TuAbstractA hydrophobic epoxy resin coating with an environmental-friendly deep eutectic solvent (DES)-based conversion pretreatment was proposed to enhance the corrosion resistance of magnesium alloys. The hydrophobic epoxy resin coatings on the AZ31B magnesium alloy with and without the DES-based conversion pretreatment were thoroughly compared. It is found that the DES-based conversion film on the AZ31B magnesium alloy is mainly composed o...
Source: Journal of Materials Science and Technology - September 6, 2019 Category: Materials Science Source Type: research

Influence of minor Ce additions on the microstructure and mechanical properties of Mg-1.0Sn-0.6Ca alloy
Publication date: Available online 5 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Yanfu Chai, Chao He, Bin Jiang, Jie Fu, Zhongtao Jiang, Qingshan Yang, Haoran Sheng, Guangsheng Huang, Dingfei Zhang, Fusheng PanAbstractThe microstructure and mechanical properties of Mg-Sn-Ca-Ce alloys with different Ce contents (0.0, 0.2, 0.5, 1.0 wt%) were studied at room temperature. Ce additions to ternary Mg-Sn-Ca alloy resulted in grain refinement as well as a change in the category of second phase from CaMgSn to (Ca, Ce)MgSn and Mg12Ce. The volume fraction of second phase increased with rising ...
Source: Journal of Materials Science and Technology - September 6, 2019 Category: Materials Science Source Type: research

Oxidation behaviors of TA15 titanium alloy and TiBw reinforced TA15 matrix composites prepared by spark plasma sintering
Publication date: Available online 5 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Dongjun Wang, Hao Li, Wei ZhengAbstractThe purpose of this study is to investigate the oxidation behaviors of the TA15 titanium alloy and TiBw/TA15 composite with network microstructure in the temperature range of 873-1073 K. The results show that the oxidation kinetics of the TA15 titanium alloy and TiBw/TA15 composite follows different laws at various oxidation temperatures. Moreover, the effective activation energy Q for oxidation of the TA15 titanium alloy and TiBw/TA15 composite is determined to be...
Source: Journal of Materials Science and Technology - September 6, 2019 Category: Materials Science Source Type: research

Editorial of special issue on ultra high temperature ceramic matrix composite: design and application
Publication date: Available online 5 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Litong Zhang, Ralf Riedel (Source: Journal of Materials Science and Technology)
Source: Journal of Materials Science and Technology - September 6, 2019 Category: Materials Science Source Type: research

Impregnation approach for poly(vinylidene fluoride)/tin oxide nanotube composites with high tribological performance
We report a composite material with the high tribological performance, which consists of one-dimensional SnO2 nanotubes (ST) and a high molecular weight poly(vinylidene fluoride) (PVDF) matrix in terms of nano-impregnation. Dissolution of PVDF in N,N-dimethylformamide (DMF) resulted in a facile penetration of PVDF into the inner hollow voids of ST, leading to the close contact. Interaction between PVDF and ST results in a beneficial effect on the chain arrangement of PVDF, providing an α-phase with better tribological property. Upon ST incorporation, the friction coefficient decreased by 85.0% to 0.408, and the speci...
Source: Journal of Materials Science and Technology - September 6, 2019 Category: Materials Science Source Type: research

Microbiologically influenced corrosion of 304L stainless steel caused by an alga associated bacterium Halomonas titanicae
Publication date: Available online 4 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Yuqiao Dong, Yassir Lekbach, Zhong Li, Dake Xu, Soumya El Abed, Saad Ibnsouda Koraichi, Fuhui WangAbstractAlgae are reported to be corrosive, while little is known about the role of the algae associated bacteria in the corrosion process. In the present study, Halomonas titanicae (H. titanicae) was isolated from a culture of an alga strain, Spirulina platensis, and identified through 16S rRNA gene analysis. Corrosion behavior of 304 L stainless steel coupons in the presence and absence of H. titanicae wa...
Source: Journal of Materials Science and Technology - September 5, 2019 Category: Materials Science Source Type: research

Effects of proton irradiation on the microstructure and mechanical properties of Amosic-3 silicon carbide minicomposites
Publication date: Available online 4 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Chuanxin Liu, Bo Chen, Xiaoqiang Li, Yahuan ZhaoAbstractOne dimensional Amosic-3 silicon carbide fiber reinforced silicon carbide matrix composites (SiCf/SiC minicomposites) prepared by chemical vapor infiltration were irradiated with 2.8 MeV proton ions. The ion fluences were 1.0 × 1017 and 1.5 × 1017 cm-2 at room temperature and 300℃, respectively. The microstructure and mechanical properties were investigated before and after proton irradiation. Raman ...
Source: Journal of Materials Science and Technology - September 5, 2019 Category: Materials Science Source Type: research

Low-cycle fatigue life prediction of a polycrystalline nickel-base superalloy using crystal plasticity modelling approach
Publication date: Available online 4 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Guang-Jian Yuan, Xian-Cheng Zhang, Bo Chen, Shan-Tung Tu, Cheng-Cheng ZhangAbstractA crystal plasticity model is developed to predict the cyclic plasticity during the low-cycle fatigue of GH4169 superalloy. Accumulated plastic slip and energy dissipation as fatigue indicator parameters (FIPs) are used to predict fatigue crack initiation and the fatigue life until failure. Results show that fatigue damage is most likely to initiate at triple points and grain boundaries where severe plastic slip and energy dissi...
Source: Journal of Materials Science and Technology - September 5, 2019 Category: Materials Science Source Type: research

Improving WC-Co coating adhesive strength on rough substrate: finite element modeling and experiment
This study gives understanding on the mechanism of adhesive strength affected by roughness, which contributes to the parameter optimization with better performance. (Source: Journal of Materials Science and Technology)
Source: Journal of Materials Science and Technology - September 5, 2019 Category: Materials Science Source Type: research

Powder metallurgy synthesis of porous Ni-Fe alloy for oxygen evolution reaction and overall water splitting
Publication date: Available online 29 August 2019Source: Journal of Materials Science & TechnologyAuthor(s): Wenbo Li, Qingfeng Hu, Yunwei Liu, Mengmeng Zhang, Jiajun Wang, Xiaopeng Han, Cheng Zhong, Wenbin Hu, Yida DengAbstractDeveloping inexpensive and high efficient catalysts is essential for generating oxygen and hydrogen via water splitting. Herein, based on powder metallurgy, a Ni-Fe based compound (Ni8Fe2 alloy) with unique porous structure and controllable phase has been designed and synthesized. Without using a solvent or template, the alloy exhibits a porous structure with uniformly distributed multi-phase. T...
Source: Journal of Materials Science and Technology - August 31, 2019 Category: Materials Science Source Type: research

Construction of novel TiO2/Bi4Ti3O12/MoS2 core/shell nanofibers for enhanced visible light photocatalysis
Publication date: Available online 29 August 2019Source: Journal of Materials Science & TechnologyAuthor(s): Meng-Jie Chang, Wen-Na Cui, Jun Liu, Kang Wang, Hui-Ling Du, Lei Qiu, Si-Meng Fan, Zhen-Min LuoAbstractTiO2/Bi4Ti3O12 hybrids have been widely prepared as promising photocatalysts for decomposing organic contaminations. However, the insufficient visible light absorption and low charge separation efficiency lead to their poor photocatalytic activity. Herein, a robust methodology to construct novel TiO2/Bi4Ti3O12/MoS2 core/shell structures as visible light photocatalysts is presented. Homogeneous bismuth oxyiodide...
Source: Journal of Materials Science and Technology - August 31, 2019 Category: Materials Science Source Type: research

Hollow Co2P/Co-carbon-based hybrids for lithium storage with improved pseudocapacitance and water oxidation anodes
Publication date: Available online 29 August 2019Source: Journal of Materials Science & TechnologyAuthor(s): Lei Hu, Fuxin Wang, M.-Sadeeq Balogun, Yexiang TongAbstractA porous hollow hybrid nanoarchitecture that consist of Co2P/Co nanoparticles confined in nitrogen-doped carbon (NC) and carbon nanotube (CNT) hollow nanocubes (denoted as H-Co2P/Co-NC/CNT) has been rational designed as anode for lithium ion batteries (LIBs) and electrocatalytic oxygen evolution reaction (OER). Such design involves simple synthetic process of using metal-organic frameworks (MOFs) as sacrificial precursor. The uniform cubic-shaped H-Co2P/...
Source: Journal of Materials Science and Technology - August 31, 2019 Category: Materials Science Source Type: research

A new strategy for corrosion protection of porous stainless steel using polypyrrole films
Publication date: Available online 29 August 2019Source: Journal of Materials Science & TechnologyAuthor(s): C. Garcia-Cabezon, C. Garcia-Hernandez, M.L. Rodriguez-Mendez, F. Martin-PedrosaAbstractIn this work, a method to improve the protection against corrosion of porous sintered stainless steel is presented. It is based on the electrodeposition of polypyrrole (PPy) layers doped with a large size counterion such as dodecylbenzenesulphonic acid (DBSA), a conducting polymer with high corrosion resistance and good biocompatibility. The efficacy of PPy coating depends on the adequate adhesion between the metal substrate ...
Source: Journal of Materials Science and Technology - August 31, 2019 Category: Materials Science Source Type: research

Preparation and application of microfluidic SERS substrate: challenges and future perspectives
Publication date: Available online 29 August 2019Source: Journal of Materials Science & TechnologyAuthor(s): Jiuchuan Guo, Fanyu Zeng, Jinhong Guo, Xing MaAbstractSurface-enhanced Raman spectroscopy (SERS), as a highly sensitive molecular analysis technique, can realize fast and non-destructive detection of the information of molecular bonds to identify the component of analytes by “fingerprint” identification. The preparation of SERS substrates plays an extremely important role in the development of SERS technology and the application of SERS detection. By integrating SERS enhancement substrates into micro...
Source: Journal of Materials Science and Technology - August 31, 2019 Category: Materials Science Source Type: research

(NH4)3PW12O40-H3PO4 composites as efficient proton conductor at intermediate temperatures
Publication date: Available online 29 August 2019Source: Journal of Materials Science & TechnologyAuthor(s): Xiaoxiang Xu, Shunhuang WeiAbstract(NH4)3PW12O40 and (NH4)3PW12O40-H3PO4 composites have been synthesized by precipitation method. Their phase compositions, thermal stability and morphologies have been investigated. The synthesized composites maintain the same structures as pure (NH4)3PW12O40 where phosphoric acid is preserved in residual space of the “spongy crystals” of (NH4)3PW12O40. FT-IR spectra confirm the strong interactions between phosphoric acid and Keggin ions. Pristine (NH4)3PW12O40 shows...
Source: Journal of Materials Science and Technology - August 31, 2019 Category: Materials Science Source Type: research

Improved interfacial wetability in Cu/ZnO and its role in ZnO/Cu/ZnO sandwiched transparent electrodes
Publication date: Available online 29 August 2019Source: Journal of Materials Science & TechnologyAuthor(s): Mingshi Yu, Guancheng Wang, Rongrong Zhao, Enze Liu, Tonglai ChenAbstractOxide/metal/oxide (OMO) and its derivatives are considered as the promising alternatives to achieve high performance transparent electrodes (TEs). The percolation thickness and conductivity of the metal layer are very crucial for the optoelectrical properties of any OMO TE. Here, we report a facile method to promote the initial growth of the metal layer by improving the interfacial wettability between O-M interface. By subsequently combined...
Source: Journal of Materials Science and Technology - August 31, 2019 Category: Materials Science Source Type: research

Influence of travel speed on microstructure and mechanical properties of wire + arc additively manufactured 2219 aluminum alloy
Publication date: Available online 29 August 2019Source: Journal of Materials Science & TechnologyAuthor(s): Yinghui Zhou, Xin Lin, Nan Kang, Weidong Huang, Jiang Wang, Zhennan WangAbstractWire + arc additive manufacturing (WAAM) was preliminarily employed to fabricate the 2219 aluminum alloy. The influence of the electric arc travel speed (TS) on the macro-morphology, microstructure, and mechanical properties were investigated. The results indicated that as the electric arc TS increased, the size and the volume fraction of equiaxed grain decreased. The high arc TS during WAAM also promoted the precipitat...
Source: Journal of Materials Science and Technology - August 31, 2019 Category: Materials Science Source Type: research