Sliding wear behavior of electrodeposited Ni-W alloy and hard chrome coatings

被引：93
|
作者：
Wasekar, Nitin P. [1 ]
Sundararajan, G. [1 ]
机构：
[1] Int Adv Res Ctr Powder Met & New Mat, Hyderabad 500005, Andhra Pradesh, India
来源：
WEAR | 2015年 / 342卷
关键词：
Hard chrome replacement; Sliding wear; Nickel tungsten; Hardness; Grain size; Electrochemistry; NANOCRYSTALLINE NICKEL COATINGS; GRAIN-BOUNDARY SEGREGATION; ATOM-PROBE TOMOGRAPHY; COBALT-TUNGSTEN; PULSED CURRENT; SIZE; REPLACEMENT; RESISTANCE; MECHANISM; EVOLUTION;
D O I：
10.1016/j.wear.2015.10.003
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Present study deals with the comparative sliding wear behavior of electrodeposited nickel-tungsten (Ni-W) alloy and conventional hard chrome (HCr) coatings. Ni-W alloys with different W (7.4, 10.5 and 11 at%) content in Ni were systematically deposited using pulsed electrodeposition from citrate bath. In addition, pure Ni coatings were also obtained from Watt's bath for comparison purpose. The dry sliding wear behavior of Ni, Ni-W and HCr coatings was compared using pin on disc configuration against WC-Co disc at three different loads. The results indicate that the wear rate is lowest for NiW10.5 amongst all the coatings despite of the fact that HCr coating is 12% harder than NiW10.5 coating. The wear behavior was attributed to ductile wear mechanism in NiW10.5 coatings as opposed to brittle fracture in the case of HCr coatings. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：340 / 348
页数：9
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