Ni-based bulk amorphous alloys in the Ni-Ti-Zr-(Si,Sn) system

被引:114
|
作者
Yi, S [1 ]
Park, TG [1 ]
Kim, DH [1 ]
机构
[1] Yonsei Univ, Dept Met Engn, Ctr Noncrystalline Mat, Seoul 120749, South Korea
关键词
D O I
10.1557/JMR.2000.0348
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
New Ni-based bulk amorphous alloys in the alloy system Ni-Ti-Zr-(Si,Sn) were developed through systematic alloy design based upon the empirical rules for high glass forming alloys. Small additions of Si and/or Sn significantly improved the glass forming ability (GFA) of the alloys Ni57Ti23-xZr20(Si,Sn)(x) leading to a Ni-based bulk amorphous alloy. The amorphous ribbons of the alloys Ni57Ti23-xZr20(Si,Sn)(x) exhibited very high glass transition temperatures (T-g > 823 K), crystallization temperatures (T-x > 883 K), and large undercooled liquid regions (DeltaT(x) > 50 K) implying the high GFA of the alloys. Fully amorphous rods with the diameter of up to 2 mm can be fabricated by a copper mold casting method. Development of the new Ni-based bulk amorphous alloys having high T-g, T-x, and DeltaT(x) expands the practical applications of amorphous alloys as structural materials.
引用
收藏
页码:2425 / 2430
页数:6
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