Other

Sumitomo Electric Industries, Limited

National Aerospace Laboratories of Science & Technology Agency

Daikin Industries, Ltd.

Toyo Soda Manufacturing Co., Ltd.

National Aerospace Laboratory of Science Technology Agency

The Director of National Aerospace Laboratory of Science and Technology

Ryuzo Watanabe

Masayuki Niino

Akio Suzuki

Yoshimichi Masuda

Nobuyuki Yatsuyanagi

Junjiro Takekawa

Masaki Sasaki

Nobuhito Kuroishi

Hiroshi Sakamoto

Hiromi Gomi

Akinaga Kumakawa

Yoshinobu Takeda

Yoshihiko Doi

Shigeki Ochi

Terashi Isago

Etsuo Ohtsuki

Toshio Hirai

Kazutaka Sakiyama

Shinichi Imura

Tohru Hirano

Hiroshi Tamura

Fumiei Ono

Akiraga Kumakawa

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

Disclosed is a process for producing metallic chromium sheets having satisfactory mechanical properties directly from metallic chromium powders by successive steps of rolling (or compacting), sintering, re-rolling and annealing.

Process for producing metallic chromium plates and sheets

Growing community of inventors

Sendai, Japan

Ryuzo Watanabe