Hardness of cubic silicon nitride

被引：56

作者：

Tanaka, I ^{[1
]}

Oba, F

Sekine, T

Ito, E

Kubo, A

Tatsumi, K

Adachi, H

Yamamoto, T

机构：

[1] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan

[2] Univ Tokyo, Engn Res Inst, Tokyo 1138656, Japan

[3] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan

[4] Okayama Univ, Inst Study Earths Interior, Tottori 6820193, Japan

[5] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan

[6] Univ Tokyo, Dept Adv Mat Sci, Tokyo 1138656, Japan

来源：

JOURNAL OF MATERIALS RESEARCH | 2002年 / 17卷 / 04期

关键词：

D O I：

10.1557/JMR.2002.0105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report that polycrystalline cubic-Si3N4 with a spinel structure and low oxygen concentration (<0.5 wt%) shows Vickers hardness of 43 GPa when measured with the indentation load of 10 mN. The hardness decreases with the increase of the indentation load, which can be ascribed to the presence of weak grain boundaries. The high hardness can be well explained by its large shear modulus as predicted by first-principles calculations.

引用

页码：731 / 733

页数：3

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