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

作　　者：李明升 冯长杰 杨干兰 何向明 李文魁 向军淮 

机构地区：[1]Jiangxi Key Laboratory of Surface Engineering,Jiangxi Science and Technology Normal University [2]Department of Materials Science and Engineering,Nanchang Institute of Aeronautical Technology

出　　处：《中国有色金属学会会刊：英文版》2007年第A02期831-834,共4页Transactions of Nonferrous Metals Society of China

基　　金：Project (50401022) supported by the National Natural Science Foundation of China;Project (0650034) supported by the Natural Science Foundation of Jiangxi Province, China

摘　　要：The composite metastable(Ti0.5Al0.5)N,(Ti0.45Al0.45Cr0.1)N and(Ti0.35Al0.35Cr0.3)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(Ti0.5Al0.5)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(Ti0.45Al0.45Cr0.1)N,the oxide scale possesses a double-layered structure and the outer layer is rich in Ti. For(Ti0.35Al0.35Cr0.3)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.The composite metastable （Ti0.5Al0.5）N, （Ti0.45Al0.45Cr0.1）N and （Ti0.35Al0.35Cr0.3）N coatings were respectively deposited on a wrought martensite steel 1Crl 1 Ni2W2MoV 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 （Ti0.5Al0.5）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 AI and the inner layer is rich in Ti. For （Ti0.45Al0.45Cr0.1）N, the oxide scale possesses a double-layered structure and the outer layer is rich in Ti. For （Ti0.35Al0.35Cr0.3）N, a Cr-rich compound oxide scale of Ti, AI and Cr forms, and a out-diffusion of Fe from steel to the nitride coating and oxide film during the oxidation takes place.

关 键 词：电弧离子电镀法 氮化物涂层 高温性能 抗氧化性 

分 类 号：TG174[金属学及工艺—金属表面处理]