解説
多成分系金属ガラスの魅力と将来性
キーワード:
bulk metallic glass,
high entropy alloy,
high-order multicomponent,
thermal stability,
fundamental properties
2018 年 65 巻 1 号 p. 37-44
詳細
2018 年 65 巻 1 号 p. 37-44
It was found in the early 1990s that bulk metallic glasses (BMGs) are formed by use of high stability of supercooled liquid to crystallization which can be achieved only for multicomponent alloys with the three-component rule. Since then, much effort has been devoted to clarify the formation ability, atomic configuration, microstructure, thermal stability and various fundamental properties of BMGs. More recently, further high-order multicomponent nonequilibrium bulk alloys, which have been called as high entropy (HE) type alloys, have attracted special interest and the HE alloys have also been extended to crystalline bulk supersaturated solid solution alloys as well as BMGs. This paper aims to present the structure, thermal stability and mechanical properties of HE BMGs, Pseudo-HE BMGs and HE amorphous alloys, in addition to ordinary BMGs, and to investigate the features and prospects of their new high-order multicomponent glassy and amorphous alloys.
