1996 Fiscal Year Final Research Report Summary
Development of Control Method of Interface of h-BN Composites by Fracto-emission Analysis
| Project/Area Number |
07555204
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
Composite materials/Physical properties
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
MATSUO Yahtaro Tokyo Institute of Technology Dept.Inorg.Mater.Prof., 工学部, 教授 (70016608)
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| Co-Investigator(Kenkyū-buntansha) |
YASUDA Kouichi Tokyo Institute of Technology, Dept.Inorg.Mater.Ass, Prof, 工学部, 助教授 (20191306)
FUKUNAGA Osamu Tokyo Institute of Technology, Dept.Inorg.Mater.Prof., 工学部, 教授 (20199251)
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| Project Period (FY) |
1995 – 1996
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| Keywords | Ceramic Composite / Interface Control / h-BN / fracto-emission / フラクトエミッション |
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| Research Abstract |
The aim of this research is to develop a high performance long fiber reinforced ceramic matrix composites which has excellent oxidation resistance, high strength and high toughness than C/C composites by controlling interfaces using fracto-emission analysis method. The main results obtained in this research are as follows ;
1. Main equipment, the fracto-emission analysis system, was designed and produced. This equipment has probes for detecting electrons and photons.
2. The optimum condition for making the most dense h-BN matrix system was found as h-BN : 60wt%, Si3N4 : 28wt%, SiO2 : 12wt% and Y203 : 3wt% under the hotpressing temperature 1,800ﾟC.
3. Carbon fiber reinforced h-BN matrix composites were fabricated. The strength of this new composite was measured under the conditions from the room temperature to 1,600ﾟC.The strength at 1,600ﾟC was double the value of room temperature, namely, 350MPa. A model based on the special natures of interfaces was presented for describing this phenomena.
4. The optimum condition for fabricating the h-BN matrix composites was tried and succeeded in improving the room temperature strength significantly.
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