ATOM LOCATION OF THE 3RD ELEMENT IN TI-NI-X SHAPE MEMORY ALLOYS DETERMINED BY THE ELECTRON CHANNELING ENHANCED MICROANALYSIS

被引：32

作者：

NAKATA, Y

TADAKI, T

SHIMIZU, K

机构：

[1] The Institute of Scientific and Industrial Research, Osaka University, Osaka 567, 8-1, Mihoga-oka, Ibaraki

来源：

MATERIALS TRANSACTIONS JIM | 1991年 / 32卷 / 07期

关键词：

TI-NI-X ALLOY; SHAPE MEMORY ALLOY; ATOM LOCATION BY ELECTRON CHANNELING ENHANCED MICROANALYSIS; ADDITION OF A 3RD ELEMENT; CHEMICAL INTERACTION; BRAGG-WILLIAMS APPROXIMATION; PREFERENTIAL OCCUPANCY OF ATOM;

D O I：

10.2320/matertrans1989.32.580

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The atom location of the third element X (Cr, Mn, Fe, Co or Cu) in Ti48.5Ni48.5X3 alloys has been examined by electron channelling enhanced microanalysis (ALCHEMI). As a result, Fe and Co atoms were located at the Ni atom site preferentially, while Cr, Mn and Cu atoms were at both the Ni and Ti atom sites with nearly the same ratio. In order to understand these results from the viewpoint of thermodynamics, free energy of the system was calculated on the basis of Bragg-Williams approximation, taking account of the configurational entropy. The atom configuration for which the free energy was minlmized was in good agreement with the experimental results.

引用

页码：580 / 586

页数：7

共 22 条

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