Effects of surface roughness of substrate on properties of Ti/TiN/Zr/ZrN multilayer coatings

作者：Lin, Song sheng^*; Zhou, Ke song; Dai, Ming jiang; Hu, Fang; Shi, Qian; Hou, Hui jun; Wei, Chun bei; Li, Fu qiu; Tong, Xin

来源：Transactions of Nonferrous Metals Society of China, 2015, 25(2): 451-456.

DOI：10.1016/S1003-6326(15)63623-8

• Ti/TiN/Zr/ZrN multilayer coatings
• surface roughness
• sand erosion resistance
• corrosion resistance
• vacuum cathodic arc deposition
• TiN
• ZrN

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 mu m, 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 mu m.

• 出版日期2015-2
• 单位广州有色金属研究院; 华南理工大学