Calculating the composition-dependent diffusivity matrix along a diffusion path in ternary systems -: Application to β-(Ni, Pt)Al

被引：23

作者：

Bouchet, R ^{[1
]}

Mevrel, R ^{[1
]}

机构：

[1] Off Natl Etud & Rech Aerosp, DMMP, F-92322 Chatillon, France

来源：

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY | 2003年 / 27卷 / 03期

关键词：

diffusion; ternary system; aluminide;

D O I：

10.1016/j.calphad.2003.11.004

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A numerical inverse analysis has been developed to extract the composition-dependent interdiffusion coefficients from a single diffusion couple in ternary systems. Its application to various diffusion couples at 1100 degreesC in beta-(Ni, Pt)Al shows that in the composition domain investigated: . The direct interdiffusion coefficient (D) over tilde (Ni)(AlAl) increases as the platinum content increases. . A concentration gradient of platinum has no influence on the diffusion of aluminium, and the corresponding coefficient (D) over tilde (Ni)(AlPt) is zero. . The cross coefficient (D) over tilde (Ni)(PtAl) is constant and very small except for a deep minimum at an aluminium content of 50 at.%. These results are briefly discussed in relation with diffusion mechanisms in beta-(Ni, Pt)Al. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：295 / 303

页数：9

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