Electronic ionization induced atom migration in spinel MgAl2O4

被引：15
|
作者：
Jiang, Nan [1 ]
Spence, John C. H. [1 ]
机构：
[1] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA
来源：
JOURNAL OF NUCLEAR MATERIALS | 2010年 / 403卷 / 1-3期
关键词：
MAGNESIUM ALUMINATE SPINEL; AB-INITIO CALCULATION; NEAR-EDGE STRUCTURE; RADIATION-DAMAGE; MICROSTRUCTURAL EVOLUTION; IRRADIATION SPECTRUM; ENHANCED DIFFUSION; IONIZING-RADIATION; CERAMIC INSULATORS; CRYSTALS;
D O I：
10.1016/j.jnucmat.2010.06.013
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report direct spectroscopic evidence for atom migration during the initial stage of electron irradiation in spinel MgAl2O4. Time-dependent electron energy-loss spectroscopy of the Mg and Al L-23 edges shows that both Mg and Al have a tendency to occupy the octahedral interstices under electron irradiation, along with a slight expansion of the Al-O bonding distance, but there is little change in the structural framework of oxygen. The process is irreversible at room temperature. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：147 / 151
页数：5
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