Oxidation resistance of (Ti,Al,Cr)N coatings at 800 ℃

来源期刊：中国有色金属学报(英文版)2007年增刊第1期(Part ⅡB)

论文作者：李明升 冯长杰 杨干兰 何向明 李文魁 向军淮

文章页码：831 - 834

Key words：(Ti,Al,Cr)N; oxidation resistance; arc ion plating

Abstract: The composite metastable (Ti_0.5Al_0.5)N, (Ti_0.45Al_0.45Cr_0.1)N and (Ti_0.35Al_0.35Cr_0.3)N coatings were respectively deposited on a wrought martensite steel 1Cr11Ni2W2MoV for aero-engine compressor blades by arc ion plating technique with pulse substrate bias. All the coatings have B1NaCl phase with a (200) preferred orientation and dense structures. The results show that the introduction of Cr into (Ti,Al)N gives rise to a minute shrinkage of crystal lattice. The incorporation of chromium into the coatings dramastically improves the oxidation-resistance of the coatings. For (Ti_0.5Al_0.5)N, a layered oxide scale forms after 100 h oxidation and the outer layer is the blend oxide of TiO₂ and Al₂O₃, and the middle layer is rich in Al and the inner layer is rich in Ti. For (Ti_0.45Al_0.45Cr_0.1)N, the oxide scale possesses a double-layered structure and the outer layer is rich in Ti. For (Ti_0.35Al_0.35Cr_0.3)N, a Cr-rich compound oxide scale of Ti, Al and Cr forms, and a out-diffusion of Fe from steel to the nitride coating and oxide film during the oxidation takes place.

基金信息：the National Natural Science Foundation of China
the Natural Science Foundation of Jiangxi Province, China