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International Journal of Minerals, Metallurgy and Materials

Corresponding Author

Chuang Dong1,2*

1 State Key Lab of Materials Modification, Dalian University of Technology, Dalian 116024, China

2 International Center of Materials Physics, Chinese Academy of Sciences, Shenyang, 110016, China

Keywords

Sm-based alloys; bulk metallic glasses; alloy design; cluster line; electron concentration

Abstract

Ternary Sm-based Sm-Al-Co alloys at specific compositions designed using an e/a- and cluster-related criteria exhibit high glass forming abilities and form bulk glassy rods of 3 mm in diameter by a copper mold suction-casting method. Four compositions of bulk metallic glasses (BMGs) are Sm50Al25Co25, Sm52Al24Co24, Sm54Al23Co23 and Sm56Al22Co22, which all satisfy a constant conduction electron concentration of 1.5. Among them, the BMG exhibiting the largest reduced glass transition temperature ( Trg) is Sm50Al25Co25, which reaches 0.648. The glass transition temperature Tg and the onset crystallization temperature Tx of this alloy are respectively 579 and 640 K at a heating rate of 20 K/min.

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