Evaluation of ZrO2-Dispersed Al2O3 Ceramics Prepared by Coprecipitation Technique
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Al2O3-ZrO2 composite powder has been prepared using the coprecipitation technique. Al2O3 particles in the powder were surrounded with ZrO2 particles whose sizes were about 50 nm. Al2O3-20 mass%ZrO2(3 mol%Y2O3) bulk ceramics, made from the Al2O3-ZrO2 composite powder, using hot isostatic pressing (HIP) after pressure-less sintering attained a mean bending strength of about 1.1 GPa. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used for analyzing the microstructure of the composites. Both a homogeneous dispersion of ZrO2 particles in the Al2O3-ZrO2 composite ceramics and the existence of fine ZrO2 particles remaining at grain boundaries of the Al2O3 matrix might be two important factors to strengthen the Al2O3-Al2O3 grains coupling.
- 公益社団法人 日本セラミックス協会の論文
公益社団法人 日本セラミックス協会 | 論文
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