Positron annihilation in B-doped and undoped single and polycrystalline Ni3Al alloys

被引：16

作者：

Deng, Wen ^{[1
]}

Huang, Y. Y.

Brusa, R. S.

Karwasz, G. P.

Zecca, A.

机构：

[1] Guangxi Univ, Dept Phys, Nanning 530004, Peoples R China

[2] Univ Trent, Dipartimento Fis, Ist Nazl Fis Mat, I-38050 Trento, Italy

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 421卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Ni3Al alloys; 3d electrons; positron annihilation;

D O I：

10.1016/j.jallcom.2005.11.015

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：

Coincidence Doppler broadening spectra measurements on B-doped and undoped single and polycrystalline Ni3Al alloys exhibit characteristic differences. The probability of the positron-3d electron annihilations decreases with the increase of B concentration in single crystals of Ni3Al alloys, while it increases with B concentration in polycrystals of Ni3Al alloys, as long as the concentration of B is less than its solubility limit. The behavior of positrons and B atoms in single and polycrystals of Ni3Al alloys has been discussed. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：228 / 231

页数：4

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