Origin of the hardness enhancement in superhard nc-TiN/a-Si3N4 and ultrahard nc-TiN/a-Si3N4/TiSi2 nanocomposites

被引：58
|
作者：
Veprek, S.
Argon, A. S.
Zhang, R. F.
机构：
[1] Tech Univ Munich, Dept Chem, D-85747 Munich, Germany
[2] MIT, Dept Mech Engn, Cambridge, MA 02139 USA
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 2007年 / 87卷 / 12期
关键词：
D O I：
10.1080/09500830701666139
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The ideal shear strengths of a variety of TiN/SiNx/TiN interfaces have been calculated with the ab initio density functional theory. Using these data, the high hardness H >= 105 GPa, which has been reported for the quasi-ternary nc-TiN/a-Si3N4/TiSi2 nanocomposites, can be explained on the basis of the Sachs average of polycrystal plasticity of randomly oriented equiaxed grains and pressure-enhanced flow stress.
引用
收藏
页码：955 / 966
页数：12
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