Paper number 1277

FABRICATION OF POLYCRYSTALLINE YAG/ALUMINA COMPOSITE FIBERS AND YAG FIBER

Atsuya TOWATA1, Hae Jin HWANG, Masaki YASUOKA, Mutsuo SANDO and Koichi NIIHARA2

National Industrial Research Institute of Nagoya, 462-8510
1-1 Hirate-cho, Kita-ku, Nagoya, Japan
2The Institute of Scientific and Industrial Research, Osaka University, 567-0047
8-1 Mihogaoka, Ibaraki, Osaka, Japan

Summary Polycrystalline YAG fiber and alumina and YAG matrix composite fiber have been prepared by sol-gel method. alumina and YAG matrix composite fiber with fine and homogeneous microstructure could be successfully fabricated by interpenetrating YAG in alumina matrix and adding alumina of seed particles to fibers. Effect of alumina seed particles and YAG on crystallization and microstructure of composite fiber were discussed. And the size of Alumina matrix of the composite fibers heated at 1600C for 4hours was below 2 micrometers.
Keywords sol-gel, Al2O3, YAG, composite fiber, seed particle, tensile strength, microstructure, creep.

Theme : Ceramic Matrix and C/C Composites ; Processing and Forming

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