Unusual glass-forming ability of bulk amorphous alloys based on ordinary metal copper.
Unusual glass-forming ability of bulk amorphous alloys based on ordinary metal copper.
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DOI：
10.1103/physrevlett.92.245504
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发表时间：
2004-06
影响因子：
8.6
通讯作者：
Donghua Xu;G. Duan;W. Johnson
中科院分区：
文献类型：
--
作者：
Donghua Xu;G. Duan;W. Johnson
We report the unusual glass-forming ability (GFA) of a family of Cu-based alloys, Cu46Zr47-xAl7Yx (0<x< or =10, in at. %), and investigate the origin of this unique property. By an injection mold casting method, these alloys can be readily solidified into amorphous structures with the smallest dimension ranging from 4 mm up to 1 cm without detectable crystallinity. Such superior GFA is found primarily due to the alloying effect of Y, which lowers the alloy liquidus temperature and brings the composition closer to a quaternary eutectic. Other beneficial factors including appropriate atomic-size mismatch and large negative heat of mixing among constituent elements are also discussed.
