Compositional dependence of microstructure and tribological properties of plasma sprayed Fe-based metallic glass coatings  

作　　者：YANG Qin LI Ran LIU ZengQian SHI MinJie LUO XueKun ZHANG Tao 

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

出　　处：《Science China(Technological Sciences)》2012年第5期1335-1342,共8页中国科学（技术科学英文版）

基　　金：supported by the National Basic Research Program of China (Grant No. 2007CB613900);the National Natural Science Foundation of China (Grant No. 51071008);the Fundamental Research Funds for the Central Universities

摘　　要：Gas-atomized powders of three Fe-based glass-forming alloys were sprayed on mild steel substrates by atmospheric plasma spaying using the same spaying parameters. Microstructures, thermal stabilities and tribological properties of the sprayed coatings were analyzed. The coating performances showed a strong dependence on the intrinsic characters of the compositions, i.e., glass-forming ability （GFA） and supercooled liquid region （ATx）. The coatings tended to exhibit higher amorphous phase fraction for the composition with higher GFA and lower porosity for that with larger ATX. All the coatings exhibited superior wear resistance compared with the substrate. Higher wear resistance could be obtained in coatings with higher amorphous phase fraction, i.e. higher GFA of the composition. This study has important implications for composition selecting and optimizing in the fabrication of metallic glass coatings.

关 键 词：metallic glasses MICROSTRUCTURE RAPID-SOLIDIFICATION coating materials X-ray diffraction 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TH117.22[金属学及工艺—金属学]