A comparative study in microstructural and tribological aspects of phosphorus enriched electroless Ni-P and Ni-P-Cu coating

Publication date: Available online 22 August 2019Source: Materials Today: ProceedingsAuthor(s): Abhijit Biswas, Suman Kalyan Das, Prasanta SahooAbstractThe current article attempts to study the effect of different heat treatment temperature on mechanical (hardness) and tribological behavior (friction and wear) of phosphorus enriched Ni-P (EN-P) and Ni-P-Cu coatings. Inclusion of Cu (∼16 wt%) into binary EN-P (∼12% wt. P) coating is commenced an affect to its properties. The coatings are deposited on low alloy steel and heat-treated them at 400 °C and 600 °C for constant time duration i.e. 1 h duration. However, the rate of increase in heat treatment temperature is fixed at 10 °C/min for all coatings. Post deposition, the coatings (both as-plated and heat treated) are characterized by using energy-dispersive X-ray analysis (EDX), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Hardness and tribological tests are performed on Vicker’s microhardness tester and pin-on-disc tribotester respectively. For all types of coating, a typical nodular morphology is observed in SEM micrographs for as-deposited condition, while in heat treated condition coatings are appeared to be flat with an increase of nodule size. Heat treatment temperature has a vivid impact on coating microstructure. High-temperature heating at a constant period resulted in iron diffusion and oxide formation in coatings structure. Ni-P-Cu coatings exhibited lower hardness value for al...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research