On the stability and crystallisation of bulk amorphous Mg-Cu-Y-Al alloys

被引：35

作者：

Linderoth, S ^{[1
]}

Pryds, NH

Ohnuma, M

Pedersen, AS

Eldrup, M

Nishiyama, N

Inoue, A

机构：

[1] Riso Natl Lab, Dept Mat Res, DK-4000 Roskilde, Denmark

[2] Natl Res Inst Met, Tsukuba, Ibaraki 305, Japan

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2001年 / 304卷

关键词：

crystallisation; differential scanning calorimetry; alloy; bulk amorphous; supercooled liquid;

D O I：

10.1016/S0921-5093(00)01558-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Amorphous (Mg1-yAly)(60)Cu30Y10 alloys (with y between 0 and 7 at.%) have been prepared by casting the melt into a Cu mold. Differential scanning calorimetry is used to determine the crystallisation and the glass transition temperatures as functions of sample composition and heating rates. The supercooled liquid region (DeltaT = T-x - T-g) is found to become smaller with substitution of Mg with Al. The glass forming ability is also found to decrease with the addition of Al. The dependence of the crystallisation and glass transition temperatures are fitted to a Kissinger or a Vogel-Fulcher-Tammann type of expression. Combined with the cooling history of the samples the critical cooling rate is deduced to be 70 +/- 20 Ks(-1). (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：656 / 659

页数：4

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