Abstract
•Glassy type metallic alloys exhibit unique characteristics compared with conventional amorphous alloys.•Fe- and Co-based BGAs have attracted much attention and have been commercialized in various fields.•Recent developments and applications of Fe- and Co-based BGAs are reviewed and their future prospects are also described.
Glassy type metallic alloys exhibit unique characteristics which cannot be obtained for conventional amorphous alloys. For the last more than two decades, a number of bulk glassy alloy (BGA) systems have been developed and centimeter-class BGAs have been prepared in almost all alloy systems. Among them, Fe- and Co-based BGAs have attracted much attention and have been commercialized in various fields. This paper reviews recent developments and applications of Fe- and Co-based BGAs and their future prospects are also described.