Bimodal sintering of Al2O3/Al2O3 platelet ceramic composites

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作者：

Instituto de Ceramica y Vidrio, Madrid, Spain ^{[1
]}

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来源：

J Am Ceram Soc | / 6卷 / 1661-1667期

关键词：

Additives - Anisotropy - Ceramic matrix composites - Cracks - Densification - Density (specific gravity) - Grain growth - Grain size and shape - Microstructure - Particles (particulate matter) - Sintering - Zirconia;

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摘要：

The sintering behavior of an Al2O3 compact containing uniformly dispersed Al2O3 platelets has been investigated. The results reveal a significant decrease in the sintering rate as well as the formation of voids and cracklike defects in the presence of nonsinterable platelets. The addition of a small amount (2 vol%) of tetragonal-ZrO2 particles enhances the sintering rate, increases end-point density (approx. 99.5% of theoretical density) and prevents formation of sintering defects.

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