High strength and ductile bulk quasi-crystalline alloys

被引：0
|
作者：
Inoue, Akihisa [1 ]
机构：
[1] Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
来源：
| 2001年 / Wiley-VCH Verlag卷 / 03期
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D O I：
10.1002/1527-2648(200109)3:93.0.CO;2-P
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学科分类号：
摘要：
Quinary Zr-Al-Ni-Cu-(Ag or Pd) amorphous alloys exhibit a double-stage devitrification on heating. Primary devitrification leads to the precipitation of nanoscale icosahedral particles with a size from 20 to 50 nm. High nucleation and low growth rates are obtained in a polymorphous mode for the Ag-containing alloys and a diffusion-controlled mode for the Pd-containing alloys. The nanoscale mixed structure alloys exhibit improved strength and ductility as compared to the corresponding amorphous single-phase alloys.
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