Toa Nenryo Kogyo Kabushiki Kaisha

Tonen Corporation

Toshio Katahata

Tadashi Suzuki

Hiroyuki Aoki

Takeshi Isoda

Osamu Funayama

Mikiro Arai

Yuuji Tashiro

Genshiro Nishimura

Mutsuo Haino

Hiroshi Kaya

Kiyoshi Sato

Kozaburo Tamura

Ichiro Kohshi

Hiroshihi Kaya

Inorganic fibers having a high strength and a high modulus of elasticity at a high temperature are provided. The inorganic fibers are amorphous inorganic silicon nitirde-based fibers composed of silicon and nitrogen, optionally with oxygen, carbon and hydrogen, and having atomic ratio between above respective elements of N/Si=0.3 to 3, O/Si=up to 15, C/Si=up to 7 and H/Si=up to 15, wherein ratios of X-ray scattering intensity thereof to that of air at 1.degree. and 0.5.degree. are from 1 to 20 respectively and the silicon nitride-based fiber is still amorphous after heating in an inactive atmosphere at 1200.degree. C. for 1 hour. Composites of a metal, a ceramics, and a high molecular weight organic compound reinforced with the above fibers are also provided.

Silicon nitride-based fibers and composite material reinforced with

A shaped body is disclosed which comprises substantially amorphous, silicon nitride-based ceramic containing Si, N and B as essential components and O, C and H as optional components in amounts providing the following atomic ratios:

Boron-containing, silicon nitride-based ceramic shaped body

Silicon nitride based ceramic fibers containing Si, N, O and at least one metal M in amounts providing the atomic ratios N/Si of 0.3 to 3, O/Si of 0.0001 to 15 and M/Si of 0.001 to 5 and exhibiting an X-ray small angle scattering such that the ratio of the intensity of the small angle scattering of the fibers to that of air is 1 to 20. The ceramic fibers are produced by spinning of a polymetallosilazane into fibers and calcining the spun fibers and are useful as reinforcing fibers for composite artices having a metal or resin matrix.

Silicon nitride based ceramic fibers, process of preparing same and

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Iruma, Japan

Toshio Katahata