Unusual glass-forming ability of bulk amorphous alloys based on ordinary metal copper

被引：480

作者：

Xu, DH ^{[1
]}

Duan, G ^{[1
]}

Johnson, WL ^{[1
]}

机构：

[1] CALTECH, Div Engn & Appl Sci, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.92.245504

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the unusual glass-forming ability (GFA) of a family of Cu-based alloys, Cu46Zr47-xAl7Yx (0<xless than or equal to10, 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.

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页码：245504 / 1

页数：4

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