Nippon Carbon Co., Ltd.

Other

Kabushiki Kaisha Toshiba

Nippon Oil Company

Shiro Mitsuno

Hiroshi Ichikawa

Toshikatsu Ishikawa

Satoshi Miyazaki

Tsuneji Kameda

Shoko Suyama

Hideyuki Hirata

Masahiro Asayama

Haruo Teranishi

Yoshikazu Imai

Nagatoshi Okabe

Tadashi Maruyama

Katsuya Tokutomi

Shoji Onose

Hideto Nagai

A cylindrical thin-wall sleeve including an SiC fiber-reinforced SiC composite material (SiC/SiC), which has a porosity of 40% or less and a wall thickness of 5 mm or less.

SIC-composite material sleeve and process for producing the same

According to a ceramic fiber reinforced ceramic matrix composite material of the present invention, a ceramic fiber reinforced ceramic matrix composite material,comprises a composite ceramic matrix, and a preform,resulting from a fiber bundle,obtained by bundling a plurality of ceramic fibers,and disposed therein, and is characterized in that a first ceramic matrix M,is formed in an inner space of the fiber bundle,and at a region adjacent to an outer periphery thereof, and a second ceramic matrix M,is formed in an inner space of the preform,and at an outer peripheral region thereof, the space and region of the preform being defined except for those of the fiber bundle. Also characteristically, ceramic fibers are compositely disposed in a fiber volume fraction (Vf) of greater than 10% in a reaction-sintered ceramic matrix. It is further preferred that the composite material be provided on a surface thereof with a coat layer composed solely of a ceramics and having a thickness of not less than 50 &mgr;m.

Ceramic fiber reinforced ceramic matrix composite material and method of producing the same

Heat-resistant and corrosion-resistant composition

A heat-resistant, corrosion-resistant inorganic composite body prepared by impregnating a heat-resistant inorganic compound body with at least one member selected from organosilicon compounds, metal alcoholates and organosilicon compound-metal alcoholate copolymers and then heat treating the thus impregnated body; and a process for preparing said heat-resistant, corrosion-resistant inorganic composite body.

Heat-resistant, corrosion-resistant inorganic composite bodies and

Ceramic fibers and a process for producing the same

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Yokohama, Japan

Shiro Mitsuno