Isothermal aging kinetics in the Cu-19 at.%Al alloy

被引：18
作者：
Adorno, AT [1 ]
Guerreiro, MR [1 ]
Benedetti, AV [1 ]
机构：
[1] UNESP, Inst Quim, Dept Fisicoquim, BR-14801970 Araraquara, SP, Brazil
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 315卷 / 1-2期
基金：
巴西圣保罗研究基金会;
关键词：
alloys; precipitation; mechanical properties; X-ray diffraction; scanning electron microscopy;
D O I：
10.1016/S0925-8388(00)01268-8
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 influence of the disordered (Cu)-alpha phase in the isothermal aging kinetics of the Cu-19 at.%Al alloy was studied using microhardness measurements, optical and scanning electron microscopy and X-ray diffractometry. The results indicate that the beta'-->(alpha+gamma (1)) decomposition reaction rate increases with the increase of the temperature in the range between 150 and 500 degreesC and at 600 degreesC the reaction is delayed by the alpha phase precipitation. The value obtained for the activation energy indicates an interface diffusion controlled reaction. (C) 2001 Elsevier Science B.V. All rights reserved.
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页码：150 / 157
页数：8
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