Cyclic oxidation behavior of electron beam physical vapor deposition NiAlHf and NiAlHfCrSi coatings at 1150℃  

作　　者：Si-Jia Liang Hong-Hai Song Lei Zheng Hong-Bo Guo 

机构地区：[1]School of Materials Science and Engineering,Beihang University,Beijing,100191,China [2]Key Laboratory of Aerospace Materials and Performance(Ministry of Education),Beihang University,Beijing,100191,China

出　　处：《Rare Metals》2023年第4期1408-1413,共6页稀有金属（英文版）

基　　金：financially supported by the National Basic Research Program of China(No.2012CB625100);the National High Technology Research and Development Program of China(No.2012AA03A512);the National Natural Science Foundations of China(Nos.51231001 and 51425102)。

摘　　要：NiAlHf and NiAlHfCrSi coatings were deposited by electron beam physical vapor deposition(EBPVD).The grain size and orientation of NiAlHf and NiAlHfCrSi coatings were determined by electron backscatter diffraction(EBSD).The NiAlHf coating reveals a more uniform grain size compared to NiAlHfCrSi coating,while the NiAlHfCrSi coating shows a<111>preferential orientation which is parallel to the normal direction of the surface of the coating.The cyclic oxidation behavior of NiAlHf and NiAlHfCrSi coatings at 1150℃was investigated.Compared to NiAlHf coating,the NiAlHfCrSi coating shows improved resistance to cyclic oxidation and scale spallation.The effect of grain size and orientation on the cyclic oxidation behavior of NiAlHf and NiAlHfCrSi coatings were investigated at 1150℃.

关 键 词：Rare earth elements Thermal cycling COATINGS Grain size ORIENTATION 

分 类 号：TG174.4[金属学及工艺—金属表面处理]