纳米SiC浓度对Ni/纳米MoS<sub>2</sub>基复合镀层结构和耐磨性能的影响

doi:10.11868/j.issn.1001-4381.2015.10.010

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摘要

采用双脉冲复合电镀技术,在瓦特型镀液中,制备含纳米SiC的Ni/MoS₂基复合镀层。研究纳米SiC浓度对复合镀层微观形貌、组织结构、显微硬度和摩擦性能的影响。结果表明:镀液中添加纳米SiC后,Ni/MoS₂复合镀层的微观形貌产生明显的变化,随镀液中SiC浓度的增加,复合镀层表面致密度提高;镀液中纳米SiC浓度在1.0~1.5g/L时,组织由Ni+MoS₂+SiC组成;纳米SiC为1.5g/L时,显微硬度达到最大,为505HV,摩擦因数为0.28,分别为纯Ni/MoS₂的1.6倍和1/2。复合镀层的磨损机制以磨料磨损为主。

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	王红星
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关键词 ： Ni/MoS₂基复合镀层, 纳米SiC, 耐磨性能

Abstract：

Ni/MoS₂ based composite coatings containing nano-SiC particles was prepared by doublepulse electrodepositing in Watts nickel plating solution. The effect of content of nano-SiC in the solution on the micro morphology, microstructure, hardness and friction properties of coating was investigated. The results show that the micro morphology of Ni/MoS₂ composite coating changes obviously after adding nano-SiC particles in electrolyte, the density of the coating surface increases with the increasing of the concentration of nano-SiC particles in electrolyte,the microstructure of coatings is mainly composed of nickel,MoS₂ and SiC,when the content of nano-SiC ranging from 1.0-1.5g/L, the hardness of composite coatings increased with increasing the content of nano-SiC in electrolyte, when nano-SiC is 1.5g/L in electrolyte, the microhardness of coating reaches the maximum value of 505 HV and the friction coefficient of coating is 0.28,which is about 1.6 times and 1/2 of pure Ni/MoS₂ composite coating respectively;and the wear mechanism of coatings is mainly abrasive wear .

Key words： Ni/MoS₂ base composite coating nano-SiC wear resistance

收稿日期: 2014-09-04 出版日期: 2015-10-17

基金资助:青年科学基金项目(51301087);南京工程学院资助项目(CKJB201205,201411276024Y)

通讯作者: 王红星 E-mail: wanghx@njit.edu.cn

作者简介: 王红星(1971-),男,博士,副教授,主要从事复合材料制备及性能研究,联系地址:南京工程学院材料工程学院(211167),E-mail: wanghx@njit.edu.cn

引用本文:

王红星, 谈淑咏, 柳秉毅, 沈彤. 纳米SiC浓度对Ni/纳米MoS₂基复合镀层结构和耐磨性能的影响[J]. 材料工程, 2015, 43(10): 60-65.
Hong-xing WANG, Shu-yong TAN, Bing-yi LIU, Tong SHEN. Effect of Nano-SiC Content on Microstructure and Wear Resistance of Ni/Nano-MoS₂ Based Composite Coating. Journal of Materials Engineering, 2015, 43(10): 60-65.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.10.010 或 http://jme.biam.ac.cn/CN/Y2015/V43/I10/60

Fig.1 镀液中不同SiC浓度时复合镀层的微观形貌
(a)未添加；(b)0.5g/L；(c)1.0g/L；(d)1.5g/L

Fig.2 复合镀层的截面微观形貌
(a)未添加；(b)0.5g/L；(c)1.0g/L；(d)1.5g/L

Fig.3 镀液中不同SiC浓度时复合镀层XRD图谱
(a)未添加；(b)0.5g/L；(c)1.0g/L；(d)1.5g/L

Fig.4 镀液中 SiC浓度对复合镀层硬度的影响

Fig.5 摩擦因数随时间变化的曲线

Fig.6 镀液中添加不同浓度SiC的复合镀层磨痕形貌
(a)未添加；(b)0.5g/L；(c)1.0g/L；(d)1.5g/L

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