Hardness of cubic spinel Si3N4

被引：57
作者：
He, JL [1 ]
Guo, LC
Yu, DL
Liu, RP
Tian, YJ
Wang, HT
机构：
[1] Yanshan Univ, Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[3] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 23期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.1832756
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The hardness of cubic spinel Si3N4 was calculated by using our microscopic model of hardness combined with first principles calculation. The calculated Vickers hardness is only 33.3 GPa in good agreement with its experimental values reported recently, indicating that the cubic spinel Si3N4 is not a superhard material. Our calculation results also implicate a more important fact that predicting the hardness of a material based on its bulk modulus or shear modulus is impertinent. (C) 2004 American Institute of Physics.
引用
收藏
页码：5571 / 5573
页数：3
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