标题：Dry sliding wear behavior of PVD TiN, Ti_(55)Al_(45)N, and Ti_(35)Al_(65)N coatings at temperatures up to 600℃
作者：Deng Jianxin;Liu Aihua
作者机构：School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong Province, PR China;School of Mechanical Engineerin
来源：International Journal of Refractory Metals & Hard Materials
关键词：Friction and wear;Sliding wear;Nitride coatings;Wear mechanisms
摘要：Three PVD nitride coatings (TiN, Ti_(55)Al_(45)N, and Ti_(35)Al_(65)N) with different Al content were deposited on the cemented carbides by cathode arc-evaporation technique. Microstructural and fundamental properties of these nitride coatings were examined. The friction and wear behavior of these coatings were evaluated at temperatures up to 600℃. The wear surface features of the test samples were examined by scanning electron microscopy. Results showed that the friction coefficient of these nitride coatings is different depending on the temperature. The friction coefficient of TiN coating increased with the increase of test temperature; while the friction coefficient of Ti_(55)Al_(45)N, and Ti_(35)Al_(65)N coatings with the addition of Al decreased with the increase of test temperature. The Ti_(55)Al_(45)N, and Ti_(35)Al_(65)N coatings exhibited higher wear resistance over the one without Al (TiN coating). The wear resistance of these nitride coatings at high temperature wear tests is significantly dependent on their tribological oxidation behavior. The Ti_(55)Al_(45)N, and Ti_(35)Al_(65)N coatings with the addition of Al exhibited improved wear resistance as compared to the TiN coating, which was attributed to that their tribo-chemically formed Al_2O_3 exhibited better tribological properties than the TiO_2 of the latter.