Single-phase interdiffusion in TiAl

被引：80

作者：

Sprengel, W

Oikawa, N

Nakajima, H

机构：

[1] Dept. of Mat. Science and Technology, Iwate University, Morioka 020

来源：

INTERMETALLICS | 1996年 / 4卷 / 03期

关键词：

titanium aluminides; based on TiAl; diffusion;

D O I：

10.1016/0966-9795(94)00033-6

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：

Interdiffusion coefficients in gamma-TiAl have been measured in the temperature range from 1116 to 1583 K. No significant concentration dependence of the interdiffusivities was observed in Ti50Al50/Ti46Al54 single-phase interdiffusion couples. The temperature dependence of the interdiffusivities obeys the Arrhenius law with a pre-exponential factor of D-0 = 2.8 . 10(-4) m(2) s(-1) and an activation enthalpy of Q = (295 +/- 10) kJ mol(-1) within experimental error. The present result is discussed together with the data of Ti-44 tracer diffusion in TiAl.

引用

页码：185 / 189

页数：5

共 17 条

[1]

[Anonymous], 1992, DIFFUSION METALLEN G

[2]

BIRKS LS, 1971, ELECTRON PROBE MICRO

[3]

BORMANN R, COMMUNICATION

[4] THERMAL FORMATION OF VACANCIES IN TIAL [J].