TERNARY INTERDIFFUSION COEFFICICENTS IN α2-PHASE Ti3Al/Nb SYSTEM

被引：2
|
作者：
Wang, W. [1 ]
Yuan, B. [1 ]
Zhou, C. [1 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Key Lab Aerosp Mat & Performance, Minist Educ, Beijing 100191, Peoples R China
来源：
JOURNAL OF MINING AND METALLURGY SECTION B-METALLURGY | 2012年 / 48卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Oxidation; Diffusion; Interdiffusion; Ti3Al-Nb; TI-AL; DIFFUSION; NB; COEFFICIENTS; BEHAVIOR; ALLOYS; FE; DEPENDENCE; COUPLES; CR;
D O I：
10.2298/JMMB110913023W
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The alpha(2) single phase interdiffusion in Ti3Al-Nb ternary system was studied at temperatures of 1323, 1373 and 1423 K. The interdiffusion coefficients were calculated by the method of Dayananda. The average ternary interdiffusion coeffcients were determined in the mid of the diffusion zone, and the trace diffusion coefficients can be estimitaed in the limit c(X)-> 0. The obtained main interdiffusion coeffcients is little smaller than privious reported and the diffusion activation energy of Nb calculated by the trace diffusion coefficients is 299.29 kJmol(-1) accoding to the Arrhenius equation. These results can provide a theoretical basis for the mechanisms of Nb improving the oxidation resistance of Ti3Al.
引用
收藏
页码：283 / 290
页数：8
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