Formation and thermal stability of Cu-Zr-Al-Er bulk metallic glasses with high glass-forming ability

Junying Fu, Hua Men, Shujie Pang, Chaoli Ma, and Tao Zhang Department of Materials Science and Engineering, Behang University, Beijing 100083, China

摘 要：The formation and thermal stabilities of Cu46.25Zr46.25xAl7.5Erx （x=0 to 8） bulk metallic glasses （BMGs） were investigated. The addition of a small amount of Er （2at%） for replacing Zr effectively improves the glass-forming ability of Cu46.25Zr46.25Al7.5 alloy, and the glassy rod with a diameter of at least 12 mm can be formed. The glass transition temperature （Tg）, temperature interval of su- percooled liquid region △Tx （=Tx-Tg）, and reduced glass transition temperature Trg （=Tg/Tl） of Cu46.25Zr44.25Al7.5Er2 glassy alloy are 699 K, 62 K and 0.607, respectively.

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