1998 Fiscal Year Final Research Report Summary
Reliability of layerecl ceramics composites
| Project/Area Number |
08455317
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Research Center for Advanced Science and Technology, The University of Tokyo |
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Principal Investigator |
ENOKI Manabu RCAST,The University of Tokyo, Associate Professor, 先端科学技術研究センター, 助教授 (70201960)
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| Co-Investigator(Kenkyū-buntansha) |
MORI Hisasi RCAST,The University of Tokyo, Research, Associate, 先端科学技術研究センター, 助手 (10302788)
KISHI Teruo National Institute for Advanced Interdisciplinary Research, Director General, 産業技術融合領域研究所, 所長(研究職)
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| Project Period (FY) |
1996 – 1998
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| Keywords | ceramics / composites / laminate materials / reliability / toughness / R-curve |
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| Research Abstract |
Ceramics have a high strength, high temperature and high corrosion resistance. However, its intrinsic brittleness becomes a big problem for practical application. The objection of this research is to develop the practical materials for structural application to improve the toughness of materials using the technique of laminating. We produced the ceramics/ceramics and ceramics/glass materials and measured the mechanical properties and analied the micro fracture process. It was demonstrated that optimized lager thickness and interfacial strength could enhance the toughness of materials.
To improve the toughness, the combination of brittle materials has alimifatiom. Also we developed the ceramics/metals laminate materials and analysed the mechanical properties. The aluminum/alumina laminate materials were fabricated by vacuum diffusion method after alumina sheets by tape casting. The crack propagation resistance curve demonstrated. The five times higher value of toughness compared with monolithic alumina. The R-curve behavior could be also predicted using stress-strain curve of aluminum.
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