Hardness of cubic silicon nitride

I. Tanaka; F. Oba; T. Sekine; E. Ito; A. Kubo; K. Tatsumi; H. Adachi; T. Yamamoto

doi:10.1557/JMR.2002.0105

Hardness of cubic silicon nitride

I. Tanaka^*, F. Oba, T. Sekine, E. Ito, A. Kubo, K. Tatsumi, H. Adachi, T. Yamamoto

^*この研究の対応する著者

研究成果: Article › 査読

58 被引用数 (Scopus)

抄録

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.

本文言語	English
ページ（範囲）	731-733
ページ数	3
ジャーナル	Journal of Materials Research
巻	17
号	4
DOI	https://doi.org/10.1557/JMR.2002.0105
出版ステータス	Published - 2002 4月
外部発表	はい

ASJC Scopus subject areas

材料科学（全般）
凝縮系物理学
材料力学
機械工学

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abstract = "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.",

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AU - Tanaka, I.

AU - Oba, F.

AU - Sekine, T.

AU - Ito, E.

AU - Kubo, A.

AU - Tatsumi, K.

AU - Adachi, H.

AU - Yamamoto, T.

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AB - 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.

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Hardness of cubic silicon nitride

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