Nippon Oil Company

Other

Yoshio Soda

Shinichi Takemura

Takefumi Kohno

Yutaka Arai

Hideyuki Ohno

Tomohiro Nakanishi

Daisuke Uchida

Noriyuki Kiuchi

Masaaki Shinagawa

Masakazu Hiro

Mitsuhiro Ishii

Kazuyoshi Okamoto

Disclosed is a plate-like carbon fiber-reinforced composite material comprising carbon fibers, wherein that the carbon fibers have a strain at compressive break of 1.7 to 5%, a tensile elastic modulus of 5 to 160 GPa, and a density of 1.5 to 1.9 g/cm,and further in that the composite comprising said carbon fibers cause no delamination by an impact energy of less than 1.4 J/mm in the test of compression after impact in accordance with JIS K 7089.

Fiber-reinforced composite materials

Method for producing carbon fiber, carbon fiber, prepreg, and molded article from fiber-reinforced composite material

A disk pad type brake comprises a rotor disk provided with a carbon-carbon composite material (a) as a friction member, and at least one pad provided with a carbon-carbon composite material (b) as a friction member, wherein the difference in thermal conductivity between the materials (a) and (b) is 30 to 450 W/m.multidot.K in the radial direction; and a multi-disk type brake comprises at least one rotor disk provided with a carbon-carbon composite material (c) as a friction member, and at least one stator disk provided with a carbon-carbon composite material (d) as a friction member, wherein the difference in thermal conductivity between the materials (c) and (d) is 30 to 450 W/m.multidot.K in the radial direction.

Disk brakes

A method for manufacturing a carbon preform comprising the steps of charging a container with pitch fibers obtained by melt spinning a carbonaceous pitch to fill therein during spinning, infusibilizing the thus filled pitch fibers, and calcining and molding the infusibilized pitch fibers under a uniaxial pressure, and a method for manufacturing a carbon/carbon composite material comprising densifying the carbon preform.

Method for manufacturing carbon preform and carbon/carbon composite

A method for preparing a carbon/carbon composite material which is characterized in that a carbon preform is impregnated with a carbonaceous pitch exhibiting a densification parameter of 0.1 or more, said densification parameter being represented by the following formula (1), and then subjected to an isotactic compression at a pressure higher than the atmospheric pressure but not higher than 10 Kgf/cm.sup.2 and at a sintering temperature of 250.degree. to 3,000.degree. C., thereby densifying the carbon preform: Densification parameter={(Weight of a sintered carbonaceous pitch (hereinafter, referred to simply as a sintered product) to be obtained through a process where a carbonaceous pitch in an open-type container is heated from room temperature up to 1000.degree. C. at a rate of 2.degree. C./min., and then sintered for 2 hours at 1000.degree. C. under isotactic compression of 9.5 Kgf/cm.sup.2)}/(Weight of a carbonaceous pitch before being sintered).times.{(Bulk density of the sintered product in the open-type container)/(True density of the sintered product)}. . . (1).

Method for preparing a carbon/carbon composite material

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Yokohama, Japan

Yoshio Soda