Glass formation of ternary Sin-based Sm-AI-Co bulk metallic glasses |
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| Affiliation: | 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;1. Oregon State University, School of Chemical, Biological and Environmental Engineering, Corvallis, OR, 97331-2072, United States;2. Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O Box 999, Richland, WA, 99352, United States;1. Division of Materials Sciences and Engineering, Ames Laboratory, US DOE, Ames, IA 50011, USA;2. Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA;1. CSIR – Central Electrochemical Research Institute, Karaikudi 630 006, India;2. Joining & Welding Research Institute, Osaka University, Osaka 567-0047, Japan;1. Departamento de Engenharia de Materiais, UFSCar, Rodovia Washington Luís, Km 235, SP-310, São Carlos, SP 13565-905, Brazil;2. Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO 80401, USA |
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| Abstract: | Ternary Sm-based Sm-AI-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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