Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 25    No. 2    February 2015

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Effects of surface roughness of substrate on properties of Ti/TiN/Zr/ZrN multilayer coatings
Song-sheng LIN 1,2, Ke-song ZHOU1,2, Ming-jiang DAI1,2, Fang HU2, Qian SHI2, Hui-jun HOU2, Chun-bei WEI2, Fu-qiu LI2, Xin TONG2

1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;
2. Department of New Materials, Guangdong General Research Institute of Industrial Technology
(Guangzhou Research Institute of Nonferrous Metals), Guangzhou 510650, China

Abstract:Ti/TiN/Zr/ZrN multilayer coatings were deposited on Cr17Ni2 steel substrates with different surface roughnesses by vacuum cathodic arc deposition method. Microstructure, micro-hardness, adhesion strength and cross-sectional morphology of the obtained multilayer coatings were investigated. The results show that the Vickers hardness of Ti/TiN/Zr/ZrN multilayer coating, with a film thickness of 11.37 μm, is 29.36 GPa. The erosion and salt spray resistance performance of Cr17Ni2 steel substrates can be evidently improved by Ti/TiN/Zr/ZrN multilayer coating. The surface roughness of Cr17Ni2 steel substrates plays an important role in determining the mechanical and erosion performances of Ti/TiN/Zr/ZrN multilayer coatings. Overall, a low value of the surface roughness of substrates corresponds to an improved performance of erosion and salt spray resistance of multilayer coatings. The optimized performance of Ti/TiN/Zr/ZrN multilayer coatings can be achieved provided that the surface roughness of Cr17Ni2 steel substrates is lower than 0.4 μm.

 

Key words: Ti/TiN/Zr/ZrN multilayer coatings; surface roughness; sand erosion resistance; corrosion resistance; vacuum cathodic arc deposition; TiN; ZrN

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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