Morphology and tribological properties of Ni/n-SiO2 composite coatings by pulse-reverse current brush-plating |
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Authors: | Tan Jun Guo Wen-cai Yang Hong-jun and Zhou Liang |
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Affiliation: | (1) National Key Laboratory for Remanufacturing, 100072 Beijing, China;(2) General Armaments Department, Changsha Military Representative Office, Wuhan Bureau, 411104 Xiangtan, China |
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Abstract: | Ni/n-SiO2 composite coating was electrodeposited by brush-plating with pulse-reverse current(RC). The morphology, hardness, and tribological
properties of the coating were investigated and compared with those of Ni and composite coatings electrodeposited with direct
current (DC). The results indicate that Ni/n-SiO2 composite coating electrodeposited by RC, because of RC and the nano powders, has denser coating, finer crystal grains, higher
hardness (HV650.0, nearly 1.5 times higher than that of Ni coating electrodeposited by DC) and lower friction coefficient
(nearly 0.62), as a result, in the wearing experiment, the Ni/n-SiO2 composite coating electrodeposited by RC has the least worn loss. So this kind of coating has better wear resistance. And
RC electro brush-plating can be used as a new technology of brush-plating in the area of wear resistance.
Foundation item: Project (50235030) supported by the National Natural Science Foundation of China; Project (51489020104JS9102) supported
by the National Key Laboratory for Remanufacturing |
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Keywords: | pulse-reverse current(RC) brush-plating nano composite coating tribological property |
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