Glass forming ability and thermodynamic properties in novel La-Al-Cu-Co bulk metallic glasses
来源期刊：JOURNAL OF RARE EARTHS2015年第9期
论文作者：李培友 孟凡莹 王永善 董敏敏 史俊婷 宋佩维
文章页码：972 - 976
摘 要：The glass forming ability（GFA） and thermodynamic properties of the La-Al-Cu-Co alloy system were investigated, and novel La-Al-Cu-Co bulk metallic glasses（BMGs） with a minimum critical diameter of 8 mm were fabricated. The differing GFAs were examined from a thermodynamic viewpoint. The GFA of the La-Al-Cu-Co alloys was well-correlated with the supercooled liquid region, ΔT x, and the parameter, γ; but not with the reduced glass transition temperature, T rg. In addition, the La62Al14Cu14Co8 BMG exhibited a high GFA, low glass transition temperature of 412 K, and broad supercooled liquid region of 70 K. These novel BMGs, which were fabricated from low-cost raw materials, had the potential to be used in various applications. The GFA of the present alloys exhibited a dependence on the relative number of Al–Co and Al–Cu atomic pairs, i.e., on the Al:Co and Al:Cu ratios, which were 2.3 and 0.85, respectively.
李培友，孟凡莹，王永善，董敏敏，史俊婷，宋佩维
School of Materials Science and Engineering, Shaanxi University of Technology
摘 要：The glass forming ability（GFA） and thermodynamic properties of the La-Al-Cu-Co alloy system were investigated, and novel La-Al-Cu-Co bulk metallic glasses（BMGs） with a minimum critical diameter of 8 mm were fabricated. The differing GFAs were examined from a thermodynamic viewpoint. The GFA of the La-Al-Cu-Co alloys was well-correlated with the supercooled liquid region, ΔT x, and the parameter, γ; but not with the reduced glass transition temperature, T rg. In addition, the La62Al14Cu14Co8 BMG exhibited a high GFA, low glass transition temperature of 412 K, and broad supercooled liquid region of 70 K. These novel BMGs, which were fabricated from low-cost raw materials, had the potential to be used in various applications. The GFA of the present alloys exhibited a dependence on the relative number of Al–Co and Al–Cu atomic pairs, i.e., on the Al:Co and Al:Cu ratios, which were 2.3 and 0.85, respectively.
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