VACANCIES AND THEIR PROPERTIES IN LI2AL67MN8TI25 STUDIED BY POSITRON LIFETIME SPECTROSCOPY

被引：7

作者：

SHIRAI, Y

MASAKI, K

YAMAGUCHI, M

机构：

[1] Department of Metal Science and Technology, Kyoto University, Sakyo-ku, Kyoto

来源：

INTERMETALLICS | 1994年 / 2卷 / 03期

关键词：

TRIALUMINIDE; AL3TI; VACANCY; RADIATION DAMAGE; POSITRON ANNIHILATION;

D O I：

10.1016/0966-9795(94)90061-2

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：

Vacancies and their properties have been studied on electron-irradiated L1(2) Al67Mn8Ti25 by using positron annihilation lifetime spectroscopy. No constitutional vacancies have been detected in the material; all constitutional point defects are substitutional anti-site atoms. The irradiated material recovers in two major stages. The first stage, around 350 K, is ascribed to the migration of vacancies. The final stage, around 500 K, is due to the dissolution of secondary defects formed at the first stage. These secondary defects are not voids but collapsed vacancy-clusters that consist of dislocations. Electron-irradiated L12 Al67Mn8Ti25 recovers almost to the fully annealed state below 550K.

引用

页码：221 / 224

页数：4

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