Influence of N2 pressure on the microstructure and properties of CrWN coatings
HE Shibin1, LU Huihong1, TIAN Canxin1, LIU Yifei2, LI zhujun2
1. School of Physical Science and Technology, Lingnan Normal University, Zhanjiang 524048, China; 2. School of Mechanical & Electronics, Guangzhou Railway Polytechnic, Guangzhou 510430, China
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 5.4×10-7 mm3/(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.
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 N2 pressure on the microstructure and properties of CrWN coatings. Materials Science and Engineering of Powder Metallurgy, 2021, 26(3): 235-242.
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