Sumitomo Electric Industries, Limited

Other

National Aerospace Laboratories of Science & Technology Agency

Japan As Represented by Director General Agency of Industrial Science

Yoshihiko Doi

Mitsunori Kobayashi

Akira Yamakawa

Nobuhito Kuroishi

Shigeki Ochi

Masaya Miyake

Yoshinobu Takeda

Masayuki Niino

Ryuzo Watanabe

Akio Suzuki

Yoshimichi Masuda

Nobuyuki Yatsuyanagi

Masaki Sasaki

Junjiro Takekawa

Akinaga Kumakawa

Masaaki Tobioka

Takaharu Yamamoto

Toshihiro Takahara

Akira Ohtsuka

Nobuo Ogasa

Yoshiki Maeda

Akira Doi

Noboru Uenishi

Tadashi Igarashi

Masao Maruyama

Yasuhiro Saito

Hiromi Gomi

Hiroshi Sakamoto

Hiroshi Tamura

Seiki Hiraoka

Toshikazu Hirayama

Yasushi Miyawaki

Fumiei Ono

An oil pump for an internal combustion engine is provided with an intake port and a discharge port, each formed in a pump housing. The oil pump has a power pump serving as a first main pump and an electric pump serving as a second auxiliary pump, both of which may be contained in a same pump housing. The power pump is rotated by a driving force of a crankshaft, and the electric pump is rotated by the driving force of an electric motor. This makes it possible to reduce the maximum capacity of the power pump serving as the main pump. In a vehicle operating range where the oil discharging pressure generated by the power pump becomes insufficient, the electric pump serving as the auxiliary pump is operated together with the power pump such that appropriate oil discharging pressure or appropriate oil discharging quantity can be achieved. The electric pump may also be allowed to operate for a period of time after shutting off of the engine.

Oil pump for internal combustion engine and method of operating the same

A ceramic compact having excellent high temperature strength, toughness and reliability, which comprises a matrix preferably composed predominantly of silicon nitride and ceramic fibers uniformly dispersed in the matrix and orientated in a desired direction, said matrix and fibers being closely bonded by sintering. This compact is produced, for example, by preparing a shaped body of silicon, for example, in which ceramic fibers are uniformly dispersed by centrifugal casting and then heating and nitriding the shaped body in a nitrogen atmosphere to form a fiber-reinforced silicon nitride sintered compact. The ceramic fibers may include such fibers as aluminum oxide or silicon carbide fibers. Sintering assistants, such as silicon nitride, may be used to prepare the sintered compact.

Formation of a ceramic composite by centrifugal casting

A ceramic compact having a more excellent high temperature strength, toughness and reliability, which comprises a silicon nitride matrix and ceramic fibers uniformly dispersed in the matrix and orientated in a desired direction, said matrix and fibers being closely bonded by sintering, is provided. This compact is produced, for example, by preparing a shaped body of silicon in which ceramic fibers are uniformly dispersed and then bearing and nitriding the shaped body in a nitrogen atmosphere to form a fiber-reinforced silicon nitride sintered compact.

Ceramic compact and a process for the production of the same

Manufacturing method of super-heat-resisting alloy material

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 relates to a process of physical vapor deposition which homogeneously and tightly coats hard compounds on the surface of cutting tools, parts requiring wear resistance or ornaments such as a watch case and the like in order to improve wear resistance, heat resistance, corrosion resistance, appearance and the like of said tools, parts or ornaments. The present invention can provide a method of physically coating a solid solution consisting of at least one compound selected from the group consisting of carbides, nitrides or oxides of metals belonging to IVb, Vb and VIb groups of the Periodic Table and/or aluminum oxide and zirconium oxide on the surface of said tools, parts or ornaments in the form of a single layer or multiple-layers, wherein the surface of said tools and the like is subjected to sputter cleaning in the atmosphere of hydrogen or the gaseous mixture of hydrogen and inert gas wherein hydrogen is present at 20% by volume or more, to homogeneously clean said surface of said tools and the like and as a result, the adhesion of the coating consisting of said compounds on said tools and the like is improved and equalized. Thus the above-mentioned properties of said tools and the like is further improved.

Process of physical vapor deposition

The invention relates to semiconductor chip mounting substrate for use in semiconductor apparatus, wherein metal material or multi-laminated metal material is coated on its surface and/or lateral faces with thin film of insulated inorganic matter in order to obtain an insulated substrate not only capable of efficiently radiating the heat developed in the semiconductor chip but also having thermal expansion coefficient approximate to that of the semiconductor chip, or further coated with film of Cu or Al so that the substrate is provided with high thermal conductivity and required thermal expansion characteristics thereby enabling to produce semiconductor apparatus highly effective for the acceleration of increase of density, reduction of size and improvement of radiation of IC.

Substrate for use in semiconductor apparatus

This invention relates to a highly hard material coated article which comprises a substrate of tool or part consisting of cermets, cemented carbides, tool steels or stainless steels and at least one highly hard material coated on the surface thereof, selected from the group consisting of carbides, nitrides and carbonitrides of at least one of titanium, zirconium and hafnium and those in which oxygen is dissolved, the coating being formed by an ion plating method wherein the accelerating voltage is high in a short time at the initial stage only, the crystals of the coated film being strongly orientated in the direction of &lt;220&gt; for the surface of the tool or part so that the diffraction intensity ratio of the peak from the {220} plane and the secondly strong diffraction peak in the X-ray diffraction using Cu-K.alpha. ray, that is, the diffraction intensity ratio is 15 or less of the latter to 100 of the former and the half value width of the diffraction peak from the {220} plane of the coating film being 0.8.degree. or more on 2.theta. scale.

Highly hard material coated articles

This invention relates to a highly hard material coated article which comprises a substrate of tool or part consisting of cermets, cemented carbides, tool steels or stainless steels and at least one highly hard material coated on the surface thereof, selected from the group consisting of carbides, nitrides and carbonitrides of at least one of titanium, zirconium and hafnium and those in which oxygen is dissolved, the coating being formed by an ion plating method wherein the accelerating voltage is high in a short time at the initial stage only, the crystals of the coated film being strongly orientated in the direction of &lt;220&gt; for the surface of the tool or part so that the diffraction intensity ratio of the peak from the {220} plane and the secondly strong diffraction peak in the X-ray diffraction using Cu-K.alpha. ray, that is, the diffraction intensity ratio is 15 or less of the latter to 100 of the former and the half value width of the diffraction peak from the {220} plane of the coating film being 0.8.degree. or more than 2 .theta. scale.

The present invention relates to a sintering furnace for powder metallurgy of cemented carbides, cermets and ceramics, which comprises a main furnace body, a heating chamber provided in the main body, a table having a moving means for carrying a workpiece in or out of the heating chamber and a means for cooling the interior of the furnace with a heat exchanger fitted to the exterior of the main furnace body, and a method for the sintering and heat treatment of cemented carbides in the sintering furnace as claimed in claim 1, which comprises sintering cemented carbides and cooling rapidly at a cooling rate of at least 30.degree. C./min from the sintering temperature being at least a temperature at which a liquid phase appears to at most 1000.degree. C. by the use of an inert gas as a coolant.

Sintering furnace for powder metallurgy

A ceramic sintered body with a high density and high surface smoothness is obtained by sintering a ceramic composition comprising oxides as a substantial or partial component in an atmosphere of CO gas or in a mixture of CO gas and an inert gas.

Method of sintering a ceramic composition

There is provided a coated tool steel having a tool steel substrate and at least one layer of a hard film overcoated on the substrate. The film consists of a B-1 type solid solution selected from carbides, nitrides and carbonitrides of at least one of titanium, zirconium or hafnium, and the breadth of the peak, at half maximum intensity, of Cu-K.alpha. diffraction from the (200) plane of the film, being not less than 0.4 degree on a 2 .theta. scale. The invention further provides a machine tool having at least one cutting part thereof formed from the coated tool steel described above. The coated steel provided herein has excellent wear resistance.

Coated tool steel and machining tool formed therefrom

A super hard metal roll assembly and a process for producing it are disclosed. Initially, a powdered mix of super hard metal materials is moulded into a hollow cylindrical moulding. The moulding is then fitted about a super hard metal cylindrical element such as roll, cylinder, pillar or shaft, and sintered to contract to a bushing tightly engaging the outer periphery of the cylindrical element to produce a super hard metal roll assembly. The roll assembly may be further treated in a high temperature and high pressure inert gas in order to eliminate voids at the interface between the bushing and the cylindrical element.

Growing community of inventors

Itami, Japan

Yoshihiko Doi