合成ジルコンとアルミナのin-situ reactionを利用したムライト-ジルコニア及びムライト-ジルコニア-アルミナ系複合焼結体の微構造変化と機械的特性
書誌事項
- タイトル別名
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- Microstructural Changes and Mechanical Properties of Mullite-ZrO<sub>2</sub> and Mullite-ZrO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> Composites Prepared Using In-Situ Reaction between Synthetic Zircon
- ゴウセイ ジルコン ト アルミナ ノ in situ reaction オ リ
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Mullite-ZrO2 and mullite-ZrO2-Al2O3 composite ceramics were prepared by in-situ reaction between alumina and synthetic zircon powders. The mechanical properties of these composites were investigated as a function of Al2O3/SiO2 weight ratio in the matrix. Three-point bending strength at room temperature and fracture toughness increased with increasing content of Al2O3 over the entire range of the Al2O3/SiO2 ratio from 70/30 to 90/10. In particular, the mean bending strength was 650MPa in the vicinity of the composition ratio of 90/10. As judged by the crystalline phases and observation of the fine structure, a strengthening mechanism which acts significantly on the mechanical properties of the composite sintered bodies was indicated by the following: (1) grain size reduction of the mullite matrix by dispersion of the Al2O3 phase, (2) nano-structure in which Al2O3 and ZrO2 particles were finely dispersed in the mullite grains and (3) dispersion-effect of the Al2O3 and ZrO2 crystalline phase with a larger thermal expansion coefficient than that of the matrix.
収録刊行物
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- Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌)
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Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌) 101 (1179), 1292-1296, 1993
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390282680254892928
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- NII論文ID
- 110002287984
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- NII書誌ID
- AN10040326
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- ISSN
- 18821022
- 09145400
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- NDL書誌ID
- 3852135
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