稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2015年
9期
972-976
,共5页
李培友%孟凡莹%王永善%董敏敏%史俊婷%宋佩维
李培友%孟凡瑩%王永善%董敏敏%史俊婷%宋珮維
리배우%맹범형%왕영선%동민민%사준정%송패유
bulk metallic glass%La-Al-Cu-Co%glass forming ability%thermodynamics%rare earths
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 liq-uid region, ΔTx, and the parameter,γ;but not with the reduced glass transition temperature, Trg. 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 pre-sent 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.
