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 

作者机构：Key Laboratory of Aerospace Materials and Performance(Ministry of Education)School of Materials Science and EngineeringBeihang UniversityBeijing 100191China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2012年第55卷第5期

页      面：1335-1342页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080203[工学-机械设计及理论] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 

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 

主　　题：metallic glasses microstructure rapid-solidification coating materials X-ray diffraction 

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.