Change of entropy in the martensitic transformation and its dependence in Cu-based shape memory alloys

被引：35
|
作者：
Romero, R
Pelegrina, JL [1 ]
机构：
[1] Univ Nacl Cuyo, CONICET, Ctr Atom Bariloche, RA-8402 San Carlos De Bariloche, Rio Negro, Argentina
[2] Univ Nacl Cuyo, Comis Nacl Energia Atom, Inst Balseiro, RA-8402 San Carlos De Bariloche, Rio Negro, Argentina
[3] Univ Nacl Buenos Aires, Ctr Provincia, IFIMAT, RA-7000 Tandil, Argentina
[4] CICPBA, RA-7000 Tandil, Argentina
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 354卷 / 1-2期
关键词：
Cu-based alloys; martensitic transformation; entropy;
D O I：
10.1016/S0921-5093(03)00013-3
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A study of the entropy change DeltaS between the beta phase and the martensite in Cu-based shape memory alloys is presented. From a compilation of available experimental data, the composition dependence of DeltaS was studied. The experimental data were analyzed within the frame of a simple model, which is based on the specific heats of the phases. It was demonstrated that the dependence of DeltaS with composition comes only through the lattice parameter and the effective mass of the alloy. For the studied composition range, the greater vibrational entropy of beta phase is mainly controlled by the high-mass Cu atoms. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：243 / 250
页数：8
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