Crystalline ceramic fiber and method of manufacturing same
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsYoshikatsu Higuchi, Masanori Okabe, Yasunobu Kawakami
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Abstract
A crystalline ceramic fiber suitable for reinforcing a formed ceramic body is produced by crystallizing an amorphous ceramic fiber composed of silicon and nitrogen by heat treatment within non-oxide ceramic powder in an inert gas atmosphere. The amorphous ceramic fiber is produced by thermally decomposing a pre-ceramic fiber produced by melting and spinning polysilazane. The amorphous ceramic fiber is mainly composed of silicon, nitrogen, carbon, and oxygen, and has such a composition that silicon has a 40 to 60 weight %, nitrogen has a 5 to 40 weight %, carbon has a 20 weight % or lower, and oxygen has a 50 weight % or lower.
Claims8
A method of manufacturing a crystalline ceramic fiber, comprising the steps of:
- melting and spinning polysilazane into a pre-ceramic fiber;
- thermally decomposing said pre-ceramic fiber into an amorphous ceramic fiber in either an inert gas atmosphere, a reducing gas atmosphere, a mixture thereof, or a vacuum;
- and
- heat-treating said amorphous ceramic fiber within non-oxide ceramic powder in an inert gas atmosphere, thereby crystallizing said amorphous ceramic fiber.
A method for manufacturing a crystalline ceramic fiber, comprising heat treating an amorphous ceramic fiber containing silicon and nitrogen within a non-oxide ceramic powder in the presence of an inert gas atmosphere.
Dependencies are inferred from the claim text.