Other

Sumitomo Electric Industries, Limited

Daikin Industries, Ltd.

National Aerospace Laboratories of Science & Technology Agency

Nippon Oil Company

Agency of Industrial Science and Technology

National Aerospace Laboratory of Science Technology Agency

Science and Technology Agency

The Director of National Aerospace Laboratory of Science and Technology

Japan As Represented by the Director-general National, Aerospace

Japan As Represented by Director-general, National Aerospace Laboratory

Masayuki Niino

Akio Suzuki

Ryuzo Watanabe

Nobuyuki Yatsuyanagi

Yoshimichi Masuda

Masaki Sasaki

Junjiro Takekawa

Toshio Hirai

Nobuhito Kuroishi

Hiromi Gomi

Tohru Hirano

Akinaga Kumakawa

Hiroshi Sakamoto

Seiichi Uemura

Makoto Sasaki

Yoshinobu Takeda

Yoshio Sohda

Yoshihiko Doi

Yasuji Ido

Shigeki Ochi

Etsuo Ohtsuki

Terashi Isago

Junichi Teraki

Hirofumi Nishibayashi

Takefumi Kohno

Yukinori Kude

Nobuhiro Sata

Hiroshi Tamura

Shogi Kawachi

Fumiei Ono

Akiraga Kumakawa

Kanichiro Sumiyoshi

Jun Ikeuchi

A carbon material having oxidation resistance is prepared by forming a fi coating constituted mainly by carbon on the surface of a carbon/carbon composite by chemical vapor deposition, then forming on said first coating a second coating of a ceramic or both a ceramic and carbon by chemical vapor deposition, and changing at least one of thermal physical properties or mechanical physical properties of carbon in said first coating continuously or step-wise.

Process for preparing carbon material

A carbon/carbon composite having oxidation resistance is produced by filling the voids of a carbon/carbon composite comprising 10-70% by volume of carbon fibers and 5-90% by volume of a carbonaceous matrix and having a void percentage of 10-55%, with at least one of carbon and a ceramic by chemical vapor infiltration and then coating the deposit surface with a ceramic or both ceramic and carbon by chemical vapor deposition.

Process for producing carbon/carbon composite having oxidation resistance

A novel metal/polymer base functionally gradient material comprising silver and a fluororesin in which the composition of silver and the fluororesin is continuously changed from one side to the other.

Fluororesin/metal base functionally gradient material

A method of producing a material having a layer of ceramic as a first component, a layer of a metal as a second component and an intermediate layer lying between said layers and including said first and second components in continuous gradient ratios so that the properties of the material may change continuous, including a step of forming said intermediate layer by igniting a powder mixture of metallic and nonmetallic constitutive elements of said ceramic component and said metal component so as to cause a synthetic reaction in the powder mixture.

Method of producing composite materials

The present invention relates to a method of producing a functionally grant material whose components and structure are continuously adjusted by the coating, plating and powder metallurgy techniques to change its function in turn and provide a method of producing a functionally gradient material superior in heat-resistance, corrosion-resistance and resistance to thermal fatigue by distributing a third component having a lower Young's modulus or formed of high-strength material sufficiently durable to the fracture strength among ceramics as a first component and metals or other ceramics as a second component to change the function.

Method of producing a functionally gradient material

In the cooling wall of a regenerative cooling rocket combustion chamber, the throat portion thereof in which the heat load is highest is formed of a porous material having a perspiring cooling action. The other portion in which the heat load is relatively low is designed to be cooled by conventional forced convection. By such a composite cooling system, a high cooling effect is provided and yet the pressure loss in the cooling passages is small and light weight and long life of the engine are attained concurrently.

Rocket combustion chamber cooling wall of composite cooling type and

A method of producing rocket combustors wherein in forming an outer cylin by a powder metallurgical method on the outer side of a cylinder provided on its outer periphery with a cooling wall of channel construction having a plurality of grooves, a low-melting alloy is used as a filler to be filled into the grooves. It is also possible to form the outer cylinder after forming a Cu plating shell on the periphery of the inner cylinder filled with the low-melting alloy.

Method of producing rocket combustors

A method of producing rocket combustors wherein in forming an outer cylin by a powder metallurgical method on the outer side of a cylinder provided on its outer periphery with a cooling wall of channel construction having a plurality of grooves (14), an Ni electroforming layer is formed on the outer side of the outer cylinder, and also a method of producing rocket combustors wherein an outer cylinder is of multilayer construction having two or more layers.

The present invention is directed particularly to an improved method using owder metallurgy for the manufacture of the grooved cooling wall of a liquid-propellant rocket combustion chamber. The surface of an inner cylinder constituting the cooling wall is formed with cooling grooves, and these grooves are densely filled up with a filler such as paraffin wax. Thereafter, metal powder which will provide an outer cylinder is compression-molded to a predetermined thickness around the inner cylinder. This metal powder is the same material as the material of the inner cylinder. After the paraffin wax which is the filler is evaporated and removed, the compression-molded metal powder body is sintered in a furnace. During this sintering heat treatment, the inner and outer cylinders are rigidly joined together by the sintering reaction between the atoms of the inner cylinder and the atoms of the metal powder.

Method of manufacturing a rocket combustion chamber

Growing community of inventors

Sendai, Japan

Masayuki Niino