Nano-size Effect of Interface Energy and Its Effect on Interface Fracture

被引：0

作者：

Liang, L. H. ^{[1
]}

You, X. M. ^{[1
]}

Ma, H. S. ^{[1
]}

Wei, Y. G. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China

来源：

ISCM II AND EPMESC XII, PTS 1 AND 2 | 2010年 / 1233卷

关键词：

Interface Energy; Size Effect; Fracture Strength; STRESS;

D O I：

10.1063/1.3452186

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

An analytical model about size-dependent interface energy of metal/ceramic interfaces in nanoscale is developed by introducing both the chemical energy and the structure stain energy contributions. The dependence of interface energy on the interface thickness is determined by the melting enthalpy, the molar volume, and the shear modulus of two materials composing the interfaces, etc. The analytic prediction of the interface energy and the atomic scale simulation of the interface fracture strength are compared with each other for Ag/MgO and Ni/Al(2)O(3) interfaces, the fracture strength of the interface with the lower chemical interface energy is found to be larger. The potential of Ag/MgO interface related to the interface energy is calculated, and the interface stress and the interface fracture strength are estimated further. The effect of the interface energy on the interface strength and the behind mechanism are discussed.

引用

页码：305 / 309

页数：5

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