Ube Industries, Inc.

Sumitomo Chemical Company, Limited

Ishikawajima-harima Heavy Industries Co., Ltd.

Japan Atomic Energy Research Institute

Nippon Carbon Co., Ltd.

Ihi Corporation

Mitsuhiko Sato

Kiyohito Okamura

Yoshio Hasegawa

Masaki Shibuya

Toshihiro Ishikawa

Tsutomu Oishi

Yoshizumi Tanaka

Takemi Yamamura

Masashi Aoshima

Tadao Seguchi

Michiyuki Suzuki

Shunichi Kawanishi

Norifumi Miyamoto

Makoto Tamura

Hiroyuki Yamaoka

Kenji Matsunaga

Shinji Kajii

Toshihiko Hogami

Yoshikatsu Harada

Hiroki Nakata

Yoshiyuki Inoue

Hironobu Shigematu

Yoshiya Nakamura

A production process which comprises a preform formation step of forming a fiber preform made of silicon carbide short fibers having heat resistance of 1000&#xb0; C. or greater; a sol-gel preparation step of preparing a sol-gel solution containing a heat resistant compound having heat resistance of 1000&#xb0; C. or greater; an impregnation-drying-calcination step of impregnating the fiber preform with the sol-gel solution, followed by drying and calcining; and a crystallization step of crystallizing the fiber preform after impregnation, drying and calcination.

Fiber-reinforced heat-resistant sound-absorbing material and process for producing the same

Production processes of an inorganic fiber-bonded ceramic component comprising inorganic fibers mainly comprising Si, M, C and O, an inorganic substance mainly comprising Si and O and boundary layers comprising carbon as a main component; and an inorganic fiber-bonded ceramic component comprising inorganic fibers which are composed mainly of a sintered structure of SiC and contain specific metal atoms and boundary layers composed mainly of carbon, wherein a preliminary shaped material is set in a carbon die, covered with a carbon powder and then hot-pressed to load a pseudo-isotropic pressure on the preliminary shaped material; and a highly heat-resistant inorganic fiber-bonded ceramic component almost free from the occurrence of peelings of surface fibers or delamination, wherein fibers are aligned in a surface shape.

Highly heat-resistant inorganic fiber-bonded ceramic component and process for the production thereof

The porous sound-absorbing material manufactured is light and has excellent heat resistance to be applicable to the exhaust nozzle etc. of a jet engine, can effectively absorb noise as that from a jet engine, over a wide range of frequencies, is free from variations in porosity, and provides stable performance characteristics. An essential feature thereof is the formation of a skeleton of the material, with aggregates containing voids. Thus, a porous sound-absorbing material having a skeleton of aggregates with first voids is described, wherein diameters of first voids of the aggregates are 50 &#x3bc;m to 100 &#x3bc;m, approximately, and diameters of second voids between the aggregates are 100 &#x3bc;m to 600 &#x3bc;m.

Sound absorbing material and its manufacturing method

A silicon-carbide-based inorganic fiber not only excellent in mechanical properties but also excellent in alkali durability and heat resistance, containing at least 0.1% by weight of a metal atom which is at least one member selected from the group consisting of metals belonging to Groups 2A, 3A and 3B of the periodic table and whose oxide exhibits amphoterism or basicity, having an oxygen content of 17% by weight or less, having an atomic ratio of carbon to silicon (C/Si) in the range of from 1 to 1.7, and having a density of less than 2.7 g/cm.sup.3.

Silicon-carbide-based inorganic fiber

The present invention provides a vulcanized rubber for a heat resistant vibration-isolator which can be obtained by vulcanizing a composition comprising:

Vulcanized rubber for heat resistant vibration-isolator

The high-strength and high-toughness sinter of the present invention includes a crystal agglomerate maintaining a fibrous shape and composed of crystals of SiC and MC.sub.1-x wherein M is Ti and/or Zr and x is a number of 0 or more but less than 1. This sinter is produced by laminating an inorganic fiber of a particular inorganic material containing titanium and/or zirconium molding the laminate into a predetermined shape, and conducting heat-sintering simultaneously with the molding or after the molding in an atmosphere of a vacuum, an inert gas, a reducing gas, or a hydrocarbon gas at a temperature of 1,700 to 2,200.degree. C.

Process for producing a high strength and high toughness sinter

A high purity and high strength inorganic silicon nitride continuous fiber substantially composed of Si and N with excellent properties can be provided. A method of producing the fiber is also disclosed.

High purity and high strength inorganic silicon nitride continuous fiber

The high-strength and high-toughness sinter of the present invention comprises a crystal agglomerate maintaining a fibrous shape and composed of crystals of SiC and MC.sub.1-x wherein M is Ti and/or Zr and X is a number of 0 or more but less than 1. This sinter is produced by laminating an inorganic fiber comprising a particular inorganic material containing titanium and/or zirconium molding the laminate into a predetermined shape, and conducting heat-sintering simultaneously with the molding or after the molding in an atmosphere comprising at least one member selected from the group consisting of a vacuum, an inert gas, a reducing gas, and a hydrucoarbon gas at a temperature of 1,700.degree. to 2,200.degree. C.

High-strength and high-toughness sinter and process for producing the

In a process of crosslinking a rubber compound with the usage of an organic peroxide as the crosslinking agent, is incorporated to the rubber compound in an amount of 0.5-20 parts by weight per 100 parts of a rubber substrate a compound selected from imidazole type compounds, thiourea type compounds, thiazole type compounds, thiuram type compounds, dithiocarbamate type compounds, phenol type compounds, triazole type compounds and amine type compounds. The process results no surface tackiness of the rubber product crosslinked in the presence of oxygen.

Methods for production of crosslinked rubber products

A continuous inorganic fiber consisting of Si, N and O has excellent physical, chemical and electrically insulating properties, is superior to carbon fiber in wettability with metal, is low in reactivity with metal, and can be used not only as a reinforcing fiber for fiber-reinforcing type metals and fiber-reinforcing type ceramics, but also in electrical insulating materials and in heat-resistant materials.

Method of producing continuous inorganic fiber consisting of Si, N and O

Continuous inorganic fiber consisting of Si, N and O and a method of

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Yamaguchi, Japan

Mitsuhiko Sato