Nippon Carbon Co., Ltd.

Agency of Industrial Science and Technology

Nippon Oil Company

Director General Agency of Industrial Science and Technology

Toshikatsu Ishikawa

Haruo Teranishi

Hiroshi Ichikawa

Yoshikazu Imai

Tokuji Hayase

Yoichi Nagata

Shiro Mitsuno

Katsuya Tokutomi

Junichi Tanaka

Masanobu Umezawa

Akira Yokoyama

Hiroshi Yamazoe

Kenji Ushikoshi

Toyonosuke Kanemaru

Isao Sugiura

Shinichiro Kondo

Kazuhisa Kawazumi

Hirofumi Harada

Tetsuo Yanagi

Hideto Nagai

Kunio Matsubara

Tatsuya Okamura

Yoshihiko Kitazume

Yoichiro Tominaga

Kazumasa Onishi

Tanaka Junichi

Heat-resistant and corrosion-resistant composition

Ceramic fibers and a process for producing the same

A process for producing a preformed wire from silicon carbide fiber-reinforced aluminum, which comprises silicon dipping a bundle of silicon carbide fibers for a period of 60 seconds or shorter in a melt of a eutectic alloy composed of aluminum and 5.0 to 7.0 wt. % of nickel added thereto which melt is kept at or below the liquidus temperature of the melting point thereof plus 50.degree. to impregnate said fiber bundle with said alloy.

Process for producing preformed wire from silicon carbide

A preform wire for fiber reinforced metal composite consisting of a metal/silicon carbide fiber composite material is light in weight and excellent in strength and elasticity, and can be easily obtained by impregnating a silicon carbide fiber bundle with a molten metal which is kept vibrated by means of an ultrasonic wave vibration apparatus having a hole for cooling water or a cooling-water jacket located at the node of the half-wavelength of the ultrasonic wave created by the vibration apparatus.

Ultrasonic wave vibration apparatus for use in producing preform wire,

A method for manufacturing a silicon carbide fiber reinforced glass composite, which comprises either dipping silicon carbide fibers in molten glass in a tank, the molten glass being given wave vibration of 10-30 KHz by a supersonic vibrator provided with a cooling means to unravel the silicon carbide fibers and have the molten glass permeated therebetween, or plasma melt ejecting glass powder onto silicon carbide fibers to obtain a silicon carbide fiber/glass preform, molding the preform into a predetermined form and then subjecting the molded preform to thermal molding thereby to manufacture the silicon carbide fiber reinforced glass composite in the form of a molding.

Manufacturing a silicon carbide fiber reinforced glass composite using

An electromagnetic wave absorber comprising a surface layer made of a composite of fibers having an electrical specific resistance of more than 10.sup.4 .OMEGA.cm and a resin, and a wave absorbing layer made of a composite containing silicon carbide fibers having an electrical specific resistance of from 10.sup.-2 to 10.sup.4 .OMEGA.cm. The composite used in the surface layer may be prepared, for example, by impregnating the resin in between the fibers after they have been treated to be a woven cloth, mat or felt or unidirectionally arranged fibers. If a wave absorbing layer is to be made of a composite containing the silicon carbide fibers and a resin, then the composite may be prepared in the same way as above.

Electromagnetic wave absorbers of silicon carbide fibers

A method for manufacturing a silicon carbide fiber reinforced glass composite, which comprises either dipping silicon carbide fibers in molten glass in a tank, the molten glass being given wave vibration of 10-30 KHz by a supersonic vibrator provided with a cooling means to unravel the silicon carbide fibers and have the molten glass permeated therebetween, or plasma melt ejecting glass powder onto silicon carbide fibers to obtain a silicon carbide fiber/gass preform, molding the preform into a predetermined form and then subjecting the molded preform to thermal molding thereby to manufacture the silicon carbide fiber reinforced glass composite in the form of a molding.

Method for manufacturing a silicon carbide fiber reinforced glass

A preform wire for fiber reinforced metal consisting of a metal/silicon carbide fiber composite material is light in weight and excellent in strength and elasticity, and can be easily obtained by impregnating a silicon carbide fiber bundle with a molten metal which is kept vibrated by means of an ultrasonic wave vibration apparatus having a cooling means.

Method of producing a preform wire, sheet or tape fiber reinforced metal

An electromagnetic wave absorber comprising an electromagnetic wave absorbing layer consisting essentially of silicon carbide fibers, which layer may be applied to a metal plate. The wave absorber comprising the absorbing layer-applied metal plate exerts wave absorption expressed in terms of a wave attenuation which is at least 10 dB higher than the inherent attenuation caused by reflection of the wave by the absorbing layer-free original metal plate, the wave used being one which has a frequency of 8-16 GHz. Further, the silicon carbide fibers may be made into woven cloths, mat felts or the like which are laminated together and then composited with a synthetic resin or ceramics to prepare the wave absorbing layer.

A process for the surface treatment of inorganic fibers for reinforcing titanium or nickel, comprising the steps of coating the surface of inorganic fibers with an aqueous or organic solvent solution containing a titanate, borate, tetralkylammonium hydroxide and, if desired, dextrin and then heat treating the coated fibers at a high temperature in an inert or non-oxidizing atmosphere. In one embodiment, the heat treated inorganic fibers is further subjected to ionic or chemical plating with nickel.

Process for the surface treatment of inorganic fibers for reinforcing

A process for producing carbon fibers from various kinds of pitches wherein the calorific values of the pitches are measured and the pitches thereafter subjected to a suitable procedure for producing carbon fibers therefrom depending on their measured calorific value.

Process for producing carbon fibers

A process for the production of flexible graphite comprising incorporating particulate expanded graphite having a c direction expansion at least 10 times as great as that of the original c direction dimension with an organo-silicon high molecular weight compound having carbon and silicon as the skeletal components, such as polysilmethylenesiloxane, or with a colloidal silica, drying the resulting mixture, pressure molding the dried mixture and heat treating the molded mixture at 500.degree.-2000.degree. C. thereby to produce the flexible graphite. In one embodiment, this invention relates to flexible graphite obtained by the process.

Process for producing flexible graphite

A carbon article manufacturing method is disclosed in which a raw material for a carbon article is revolved and heated at the same time, whereby the raw material is pressurized by centrifugal force and baked simultaneously. Further, carbon article manufacturing apparatus is disclosed which is provided with means for housing a raw material and pressurizing it by centrifugal force, means for revolving the housing and pressurizing means, and means for heating the housing and pressurizing means.

Carbon article manufacturing method

A process for producing a composite graphite material in a molded form having high density and tensile strength as well as impermeability, comprising the steps of mixing expanded graphite material with oxidized graphite material as the binder and compression molding the resulting mixture. In one embodiment, this invention relates to the composite graphite material produced by said process.

Composites of oxidized graphite material and expanded graphite material

A process for producing flexible graphite material comprises incorporating expanded graphite material with boric acid, compression molding the resulting mixture and, if desired, heating the resulting molding while under compression. This invention also relates to the flexible graphite material produced by the process.

Growing community of inventors

Tokyo, Japan

Toshikatsu Ishikawa