The electrodeposition and characterisation of low-friction and wear-resistant Co-Ni-P coatings

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	The electrodeposition and characterisation of low-friction and wear-resistant Co-Ni-P coatings
	Ma, C.1; Wang, S. C.1; Wang LP(王立平)2 ; Walsh, F. C.1,3; Wood, R. J. K.1
刊名	Surface and Coatings Technology
	2013
卷号	235 页码:495-505
关键词	Co-Ni-P Friction Microstructure Heat treatment Wear
ISSN号	0257-8972
通讯作者	Wang, S. C.
英文摘要	A new Co-Ni-P coating having superior properties to hard chrome coatings for anti-wear applications has been developed by combining the precipitation hardening of Ni-P alloys with the lubricity of cobalt-rich Co-Ni coatings. The evolution of composition and microstructure, hardness, thermal stability and tribological properties have been investigated. The local pH value near the cathode played an important role in the change of the microstructure from nanoctystalline to amorphous along the growth direction as the phosphorous content increased from 7 at.% to 26 at.%. The highest microhardness (980 HV) and the lowest wear rate (one order of magnitude lower than that of hard chrome coatings under the same dry sliding conditions) were achieved by annealing the coatings at 400 ℃ facilitating precipitation hardening. Furthermore, the coefficients of friction of both the as-deposited Co-Ni-P coating and the heat-treated samples were approximately 03, only half of that of hard chrome coatings. The wear rates of Co-Ni-P coatings annealed up to 400 ℃ are 4-7 times lower compared to that of hard chrome. The roll-like debris found on the worn surfaces of the coating annealed at 500 ℃ were oriented perpendicularly to the sliding direction. Such part might be related to the slightly reduced coefficient of friction in the stable stage.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	ICUK
语种	英语
WOS记录号	WOS:000329596100063
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/18242]
专题	兰州化学物理研究所_固体润滑国家重点实验室
作者单位	1.Univ Southampton, nCATS, Southampton SO17 1BJ, Hants, England 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, Lanzhou 730000, Peoples R China 3.Univ Southampton, Southampton SO17 1BJ, Hants, England
推荐引用方式 GB/T 7714	Ma, C.,Wang, S. C.,Wang LP,et al. The electrodeposition and characterisation of low-friction and wear-resistant Co-Ni-P coatings[J]. Surface and Coatings Technology,2013,235:495-505.
APA	Ma, C.,Wang, S. C.,Wang LP,Walsh, F. C.,&Wood, R. J. K..(2013).The electrodeposition and characterisation of low-friction and wear-resistant Co-Ni-P coatings.Surface and Coatings Technology,235,495-505.
MLA	Ma, C.,et al."The electrodeposition and characterisation of low-friction and wear-resistant Co-Ni-P coatings".Surface and Coatings Technology 235(2013):495-505.