Crystallization behaviour of Al-based metallic glasses below and above the glass-transition temperature

被引：99

作者：

Louzguine, DV ^{[1
]}

Inoue, A ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2002年 / 311卷 / 03期

关键词：

D O I：

10.1016/S0022-3093(02)01375-3

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：

The present paper aims to report an effect of a supercooled liquid region on crystallization behaviour of the Al85Y8-xNdxNi5Co2 metallic glasses produced by rapid solidification of the melt. The paper describes the crystallization process at different regimes of heat treatment. It is found that crystallization behaviour of the above-mentioned Al-based metallic glasses above the glass-transition temperature and below it follows different transformation mechanisms. Formation of the primary nanoscale alpha-Al particles was observed during continuous heating or after isothermal annealing above the glass-transition temperature. During isothermal annealing below the glass-transition temperature an unknown metastable phase is formed conjointly with alpha-Al. The metastable phase formed in the Nd-free alloy varies from that in the Nd-bearing alloys. Al85Nd8Ni5CO2 amorphous alloy exhibiting no glass transition crystallizes equally during isothermal calorimetry at different temperatures and during continuous heating. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：281 / 293

页数：13

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