| Project/Area Number |
03650629
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
無機工業化学・無機材料工学
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| Research Institution | Nagasaki University |
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Principal Investigator |
KOBAYASHI Kazuo Nagasaki University, Department of Materials Science and Engineering, Prof., 工学部, 教授 (30225495)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAO Yuuji Nagasaki University, Department of Materials Science and Engineering, Assistant, 工学部, 助手 (20206709)
UCHIYAMA Yasuo Nagasaki University, Department of Materials Science and Engineering, Associate, 工学部, 助教授 (50039690)
EGASHIRA Makoto Nagasaki University, Department of Materials Science and Engineering, Prof., 工学部, 教授 (60037934)
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| Project Period (FY) |
1991 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1992: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1991: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | Carbon / Carbon fiber / Ceramics / Composite / Oxidation / C / C複合材料 / セラミックス / 高温 |
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| Research Abstract |
1) Oxidation of mesophase-pitch carbon fibers with different microstructure and different graphitization degree were investigated and compared with those of PAN carbon fiber. Striation and pits formed on the surface by oxidation and the morphological change suggested that oxidation behavior was affected strongly by microstructure of the fiber.
2) High temperature oxidation tests for carbon/B_4C/SiC composites showed that there were three different oxidation behaviours depending on the range of oxidation temperature of below 700ﾟC, 800-1000ﾟC and above 1100ﾟC. The oxide layer formed at 1200ﾟC was suggested to be SiO_2 rich phase and remark-ably stable as a protective layer against oxidation.
3) Boron-doping was known to be effective to improve oxidation resistance of carbon fiber and C/C composite.
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