Critical grain size of nanometer composites.

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  • 表面エネルギから見たナノメータ複合材料組織の臨界寸法
  • ヒョウメン エネルギ カラ ミタ ナノメータ フクゴウ ザイリョウ ソシキ ノ

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Abstract

The critical grain size, below which the properties of the composites could be much different from those of the conventional composites, was estimated on the basis of the ideal strength and the specific surface energy. It is about 2nm-4nm for normal metal (Fe, Co), less than 1nm for oxides (Al2O3, MgO), and about 10nm for Si3N4, which suggests Si3N4 is one of the most advantageous materials for Nanometer Composites.

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