Fabrication of fibrous Al2O3-(m-ZrO2)/HAp-(t-ZrO2) core/shell composites with elongated grain formation
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- LEE Byong-Taek
- Department of Biomedical Engineering and Materials, School of Medicine, Soonchunhyang University
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- LEE Chi-Woo
- Institute of Multidisciplinary Research for Advanced Materials Division of Materials Control, Tohoku University
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- SARKAR Swapan Kumar
- Department of Biomedical Engineering and Materials, School of Medicine, Soonchunhyang University
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- SONG Ho-Yeon
- Department of Microbiology, School of Medicine, Soonchunhyang University
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Abstract
Fibrous Al2O3-(monoclinic-ZrO2)/HAp-(tetragonal-ZrO2) composites were fabricated with a core/shell microstructure by the multi-pass extrusion process depending on the volume fraction of Al2O3-(m-ZrO2) core and HAp-(t-ZrO2) shell. In the sample sintered at 1200°C, the Al2O3-(m-ZrO2) core was composed of porous, equiaxed grains, independent of core/shell volume fraction. However, after sintering at 1500°C, the core phase was changed with elongated grains of a reaction phase CaAl12O19. Formation of elongated grain increased as the core diameter decreased. A significantly improved value of fracture toughness (4.3 MPa·m1/2) was obtained in the Al2O3-(m-ZrO2)/HAp-(t-ZrO2) composites with 50core/50shell composition sintered at 1500°C.
Journal
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 117 (1362), 152-156, 2009
The Ceramic Society of Japan
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Details 詳細情報について
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- CRID
- 1390001205284416384
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- NII Article ID
- 110007044063
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- NII Book ID
- AA12229489
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- ISSN
- 13486535
- 18820743
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- NDL BIB ID
- 9781777
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed