Structure and crystallization of amorphous Cu-Zr-Al powders

被引：19
作者：
Fernandez, Ruben [1 ]
Carrasco, Wilson [1 ]
Zuniga, Alejandro [1 ]
机构：
[1] Univ Chile, Dept Mech Engn, Santiago, Chile
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 2010年 / 356卷 / 33-34期
关键词：
Crystallization; Amorphous alloys; GLASS-FORMING ABILITY; METALLIC GLASSES; MECHANICAL-PROPERTIES; KINETICS;
D O I：
10.1016/j.jnoncrysol.2010.06.016
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, the structure and crystallization of amorphous (Cu(50)Zr(50))(100-x)Al(x) (x=0, 2.5, 5, 7.5, 10) powders produced by gas atomization were studied. X-ray diffraction patterns showed an amorphous structure in the as-atomized powders; however, TEM observations revealed the presence of nanocrystals in all the samples. Differential Scanning Calorimetry (DSC) analyses revealed an improved glass forming ability (GFA) in the alloys containing Al, with the (Cu(50)Zr(50))(97.5)Al(2.5) alloy being the one with the best GFA. Kissinger analyses showed that the activation energy Ea for crystallization increased with the Al content, and the Avrami parameter, n was higher compared to traditional crystalline metallic alloys. Structural analyses of crystallized samples revealed the formation of Cu(10)Zr(7) nanocrystals. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1665 / 1669
页数：5
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