Influence of BN and B4C particulates on wear and corrosion resistance of electroplated nickel matrix composite coatings

Autor:	A. Jafari, Mohammad Ebrahim Bahrololoom, S. Paydar, V. Mozafari
Rok vydání:	2015
Předmět:	Materials science Scanning electron microscope Mechanical Engineering Composite number Metallurgy Boron carbide Carbide Corrosion chemistry.chemical_compound chemistry Boron nitride Particle General Materials Science Electroplating
Zdroj:	Tribology - Materials, Surfaces & Interfaces. 9:105-110
ISSN:	1751-584X 1751-5831
DOI:	10.1179/1751584x15y.0000000007
Popis:	Electrodeposition of nickel–boron nitride–boron carbide (Ni–BN–B4C) composites was carried out from a Watt's solution containing 50 and 10 g L− 1 of dispersed boron nitride and boron carbide particles respectively. The corrosion behaviour for both Ni and Ni–BN–B4C deposits was evaluated by polarisation curves in a 3·5% NaCl solution at room temperature. Wear resistance of the composites was also studied using pin on disc technique. Scanning electron microscopy was extensively used to understand the effect of different electroplating conditions on the concentration and distribution of particles. The results showed that BN and B4C particle concentration in the Ni–BN–B4C composite film was sensitively dependent on the electroplating current density and bath temperature. Meanwhile, the Ni–BN–B4C composite films were much more resistant to corrosion and wear than pure Ni coatings.
Databáze:	OpenAIRE
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