N<sub>2</sub>气压对CrWN涂层结构及性能影响

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摘要采用电弧离子镀技术制备CrWN涂层,研究沉积N₂气压对CrWN涂层的微观结构、形貌、沉积速率、硬度及摩擦学性能的影响。利用SEM,XRD和XPS检测/表征CrWN涂层的晶体结构、形貌及成分;利用硬度计、磨损仪和轮廓仪分别测试CrWN涂层的硬度、摩擦因数及磨损率。结果表明,CrWN涂层为面心立方结构,随着沉积N₂气压的升高,CrWN涂层的(111)和(200)衍射峰强度明显增强,涂层表面大颗粒数量和尺寸逐渐减小,沉积速率最高1.13 μm/h;当N₂气压由0.5 Pa升高到1.0 Pa时,CrWN涂层的显微硬度(HV)由1 900增大到2 010,随着N₂气压进一步升高,CrWN涂层硬度有所降低;CrWN涂层平均摩擦因数稳定在0.5左右,在N₂气压2.0 Pa时磨损率达到最大值5.4×10^-7mm³/(N∙m),明显低于CrN涂层的摩擦因数0.7和磨损率6.7×10^-7mm³/(N∙m)。

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	何世斌
	陆惠宏
	田灿鑫
	刘怡飞
	李助军

关键词 ：电弧离子镀, CrWN涂层, N₂气压, 硬度, 摩擦学特性

Abstract：The CrWN coatings were prepared by arc ion plating. The effect of nitrogen pressure on the phase structure, morphorlogy, deposition rate, hardness and tribological properties of CrWN coating was investigated. The microstructures, morphology and elements of the CrWN coatings were studied by XRD, SEM and XPS, and hardness tester, friction-wear tester and profilometer were performed to measure their friction coefficient and wear rate. The results show that CrWN coatings is face-centered cubic structure. With the increasing of nitrogen pressure, the diffraction peak intensity of the (111) and (200) of the CrWN coatings has an obvious increase. The numbers and sizes of the large particles in coatings’ surface gradually decrease, and the highest deposition rate is 1.13 μm/h. When nitrogen pressure increases from 0.5 Pa to 1.0 Pa, the microhardness (HV) of CrWN coating increases from 1 900 to 2 010. With further increase of nitrogen pressure, the microhardness of CrWN coating decreases. With the increasing of nitrogen pressure, the average friction coefficient of CrWN coating maintains at 0.5, which is lower than the friction coefficient (0.7) of CrN coating. The wear rate of CrWN coating reaches a maximum of 5.4×10^-7mm³/(N∙m) at nitrogen pressure of 2.0 Pa, which is significantly lower than the wear rate (6.7×10^-7mm³/(N∙m)) of CrN coating.

Key words： arc ion plating CrWN coating nitrogen pressure hardness tribological properties

收稿日期: 2021-01-24 出版日期: 2021-07-21

ZTFLH:

TG174.444

基金资助:广东省自然科学基金资助项目(2020A1515011451); 岭南师范学院创新创业训练项目(2019-879); 湛江市非资助科技攻关计划资助项目(2019B01080)

通讯作者: 田灿鑫,副教授,博士。E-mail: cxtian@lingnan.edu.cn

引用本文:

何世斌, 陆惠宏, 田灿鑫, 刘怡飞, 李助军. N₂气压对CrWN涂层结构及性能影响[J]. 粉末冶金材料科学与工程, 2021, 26(3): 235-242.
HE Shibin, LU Huihong, TIAN Canxin, LIU Yifei, LI zhujun. Influence of N₂pressure on the microstructure and properties of CrWN coatings. Materials Science and Engineering of Powder Metallurgy, 2021, 26(3): 235-242.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2021/V26/I3/235

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