Glass forming ability and crystallization of Zr-Cu-Ag-Al-Be bulk metallic glasses

被引：8
作者：
Xu, F.
Lou, H. B.
Wang, X. D. [1 ]
Ding, S. Q.
Cao, Q. P.
Jiang, J. Z.
机构：
[1] Zhejiang Univ, ICNSM, Hangzhou 310027, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 37期
基金：
中国国家自然科学基金;
关键词：
Bulk metallic glass; Glass forming ability; Crystallization; Be addition; SUPERCOOLED LIQUID REGION; AMORPHOUS ALLOY; ISOTHERMAL CRYSTALLIZATION; THERMAL-STABILITY; 20; MM; NI; MICROSTRUCTURE; DIAMETER; BEHAVIOR; FE;
D O I：
10.1016/j.jallcom.2011.02.107
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The glass forming ability of Zr(46)Cu(37.64-x)Ag(8.36)Al(8)Be(x) (x = 0, 6 and 10 at.%) bulk metallic glasses (BMGs) were significantly improved by Be addition. The critical size of amorphous rods can be over 35 mm diameter. The high GFA achieved is mainly due to the decrease of melting point and liquidus temperature, and suppression of the formation of crystalline phases during solidification from liquid state. The high stabilization with supercooled liquid regime of 115 K was found for the BMG with x = 10 at.%. Two independent exothermic events happen in x = 0 and 6 at.% BMGs, corresponding to the formation of primary crystalline phases Cu(10)Zr(7) and AgZr, then transforming to final stable crystalline phases Zr(2)Cu and AlCu(2)Zr. However, in the x = 10 at.% BMG, the precipitation of primary phases and transformation to final stable phases are within the first exothermic event and the AlCu(2)Zr phase is totally suppressed. (C) 2011 Published by Elsevier B. V.
引用
收藏
页码：9034 / 9037
页数：4
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