ZHANG Ergeng, WANG Qinxue, ZHOU Qiong, CHEN Qiang, HUANG Biao
(Shanghai Institute of Technology, Mechanical Engineering College, Shanghai 201418, China)

Abstract: TiAlSiN coatings deposited on carbide substrate surface by cathode arc plasma technology were oxidized at different temperature in box resistor-stove, the investigation of surface morphology, microstructure, and composition after coating oxidation were carried out, and the oxidation behaviors of TiN and AlTiN were compared. The results show that both the TiN and AlTiN coatings have different levels of oxidative damage at 800 °C, TiN coatings have been subject to failure, while the TiAlSiN coatings have uniform fracture structure and good continuity. It’s suggested by EDAX that the oxidation rate of the coating surface was lower than AlTiN coatings with the addition of Si, and TiAlSiN coatings show better high temperature oxidation behavior. Moreover, TiAlSiN coating samples were staring to oxidize at 1000°C and its substrate’s edge was damaged.
Key words: cathode arc; TiAlSiN coatings; microstructure; thermal oxidation resistance