Lattice distortion and its effects on physical properties of nanostructured materials

被引：41
|
作者：
Qin, W.
Nagase, T.
Umakoshi, Y.
Szpunar, J. A.
机构：
[1] Osaka Univ, Div Mat & Mfg Sci, Grad Sch Engn, Suita, Osaka 5650871, Japan
[2] McGill Univ, Dept Met & Mat Engn, Montreal, PQ H3A 2B2, Canada
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2007年 / 19卷 / 23期
关键词：
D O I：
10.1088/0953-8984/19/23/236217
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A theoretical model is developed to understand the basic mechanism of the deviation of a crystal lattice from the perfect structure in nanostructured materials. The interface tension and the stress field induced by the excess volume in the grain boundaries are the two main reasons for lattice distortion. Based on this model, the contribution of the lattice distortion to the thermal expansion coefficient of nanostructured materials is analysed quantitatively. The results show that the unusual physical properties of nanostructured materials result not only from grain boundaries, but also from nanocrystallites.
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页数：8
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