Hitachi, Ltd.

Hitachi-ge Nuclear Energy, Ltd.

Other

Hitachi Chemical Company, Ltd.

Junya Kaneda

Yasuhisa Aono

Yasuo Kondo

Ryuichi Saito

Yoshihiko Koike

Teruyoshi Abe

Takahiko Kato

Kazutaka Okamoto

Yasushi Muranaka

Seiji Takeuchi

Hideyo Kodama

Shigeo Hattori

Noriyuki Watanabe

Masahisa Inagaki

Akira Yoshinari

Masahiko Arai

Hideo Arakawa

Kouichi Takei

Tasuhisa Aono

Tetsuya Nagata

Tsunehiro Endo

Kenichi Hattori

Takashi Watanabe

Kazumasa Ide

Masashi Kitamura

Junnosuke Nakatsugawa

Koichi Kurosawa

Yukio Kawabata

Yoshihisa Kiyotoki

Akihito Nakahara

Satoru Aoike

Toshimi Matsumoto

Takahiro Yamaki

Shinya Ohmori

Hirotsugu Kawanaka

Daisuke Hirasawa

Sei Hirano

Shigeki Ono

To provide a fluid contact member whose corrosion resistance is particularly further improved than that in the related art. In order to solve this problem, a fluid contact memberincludes a fluid contact portionconfigured to be in contact with a fluid, the fluid contact portionhas a cobalt-based alloy phasehaving a dendrite, and a compound phaseformed in an arm space of the dendrite and containing chromium carbide, and among a plurality of secondary armsextending from one primary armconstituting the dendrite, an average interval between adjacent secondary armsis 5 μm or less. At this time, the average interval is preferably 3 μm or less. Further, the compound phaseis preferably formed discontinuously in the dendrite arm space.

Fluid contact member and method of manufacturing fluid contact member

An underwater remote inspection device is provided with an etching device and a magnifying observation device mounted to a supporting member. A chamber of the etching device is provided with a negative electrode, a positive electrode and a sealing device, and is connected to an etchant supply pipe and an etchant exhaust pipe. A single pair of annular sealing members of the sealing device is provided to a distal end portion of the chamber. A suction passage formed in the side wall of the chamber communicates to a sealing region formed between the sealing members. The magnifying observation device is provided with a magnifying camera in a waterproof container and a plurality of LED lights are installed to the waterproof container. The underwater remote inspection apparatus can prevent leakage of an etchant and reduce execution time of etching.

Underwater remote inspection device and method for underwater remote inspection

An electrical rotating machine including a stator core is provided. The stator core is formed of substantially sector-shaped sheet segments die-cut from electrical steel sheets and arranged in a circumferential direction of the stator core to form circular sheets which are stacked in an axial direction of the stator core. In the electrical rotating machine, end regions of the stator core are formed of stacked sheet segments die-cut from non-grain oriented steel sheets, and the other region of the stator core is formed of stacked sheet segments die-cut from grain oriented steel sheets.

Electrical rotating machine with local heat reduction

A lithium secondary battery, which comprises a positive electrode, a negative electrode containing a lithium ion-storable/dischargeable negative electrode-active material and a lithium ion conductive, non-aqueous electrolytic solution or polymer electrolyte can have distinguished charging/discharging characteristics and a higher safety, when the negative electrode material contains particles comprising carbonaceous materials and at least one of elements capable of forming a compound with Li; the elements have a melting point of at least 900&#xb0; C. and a thermal expansion coefficient of not more than 9 ppm/K at room temperature; the particles are embedded in a plurality of layers of the carbonaceous materials; the particles being subjected to a mechanical treatment to make particle sizes of the particles smaller than the initial particle size in advance.

Lithium secondary battery, and process for producing the same

A composite material is provided, which has a low thermal expansivity, a high thermal conductivity, and a good plastic workability, which composite material may be applied to semiconductor devices and many other uses. The composite material is composed of metal and inorganic particles having a smaller coefficient of thermal expansion than the metal. It is characterized in that the inorganic particles are dispersed in such a way that 95% or more of them (in terms of their area in cross-section) form aggregates of complex configuration joined together. The composite material contains 20-80 vol % of copper oxide, with the remainder being copper. It has a coefficient of thermal expansion of 5&#xd7;10to 14&#xd7;10/&#xb0; C. and thermal conductivity of 30-325 W/m&#xb7;K in the range of room temperature to 300&#xb0; C. It is suitable for the radiator plate of semiconductor devices and the dielectric plate of electrostatic attractors.

Composite material including copper and cuprous oxide and application thereof

Providing control apparatus with a maximum torque/current ratio control means by which the relationship between the maximum torque and current amplitudes and the relationship between the maximum torque and current phases are converted to numeric expressions including one or more than one linear function with the torque taken as the parameter, then the current amplitude command and current phase command data that yields a maximum torque is computed, and computed data is sent as an output signal.

Driving equipment for synchronous motors

Composite material, and manufacturing method and uses of same

A lithium secondary battery comprising a positive electrode, a negative electrode containing a lithium ion-storable/dischargeable negative electrode-active material and a lithium ion conductive, non-aqueous electrolytic solution or polymer electrolyte, characterized in that the negative electrode-active material comprises particles of carbonaceous material and particles of metal and metal oxide capable of enhancing lithium ion interstitial diffusibility/releasability as embedded in the particles of carbonaceous material, particles of carbonaceous materials and lithium ion interstitially diffusible/releasable particles being prepared by carbonization of a mixture thereof with MA or carbon precursor, has a high capacity and a long cycle life, and can be used in various electric appliances.

Lithium secondary battery having oxide particles embedded in particles of carbonaceous material as a negative electrode-active material

Provided are a composite material excellent in plastic workability, a method of producing the composite material, a heat-radiating board of a semiconductor equipment, and a semiconductor equipment to which this heat-radiating board is applied. This composite material comprises a metal and an inorganic compound formed to have a dendritic shape or a bar shape. In particular, this composite material is a copper composite material, which comprises 10 to 55 vol. % cuprous oxide (Cu O) and the balance of copper (Cu) and incidental impurities and has a coefficient of thermal expansion in a temperature range from a room temperature to 300&deg; C. of from 5&times;10 to 17&times;10 /&deg; C. and a thermal conductivity of 100 to 380 W/m&middot;k. This composite material can be produced by a process comprising the steps of melting, casting and working and is applied to a heat-radiating board of a semiconductor article.

A lithium secondary battery, which comprises a positive electrode, a negative electrode containing a lithium ion-storable/dischargeable negative electrode-active material and a lithium ion conductive, non-aqueous electrolytic solution or polymer electrolyte can have distinguished charging/discharging characteristics and a higher safety, when the negative electrode material contains particles comprising carbonaceous materials and at least one of elements capable of forming a compound with Li; the elements have a melting point of at least 900&deg; C. and a thermal expansion coefficient of not more than 9 ppm/K at room temperature; the particles are embedded in a plurality of layers of the carbonaceous materials; the particles being subjected to a mechanical treatment to make particle sizes of the particles smaller than the initial particle size in advance.

In order to provide an austenitic single crystal stainless steel having preferable stress corrosion cracking resistance, strength, and irradiation induced embrittlement resistance so as to extend the life of a nuclear reactor core structure, which is used under a high radiation dose environment, a method is employed, which comprises the steps of homogeneously dispersing carbides into a parent phase of the austenitic single crystal stainless steel by a two step solution heat treatment, and subsequently effecting an ageing heat treatment after rapid cooling for precipitating fine carbides. Austenitic single crystal stainless steel having preferable stress corrosion cracking resistance, strength, and irradiation induced embrittlement resistance can be provided, and the life of nuclear reactor core structure, which is used under a high radiation dose environment, can be extended.

Precipitation hardening type single crystal austenitic steel, and usage

Precipitation hardening type single crystal austenitic steel

A method of performing thermal working to metal material containing helium, which comprises the steps of previously feeding current through a thermally working portion of the metal material containing helium to thereby reduce a helium content in the portion without melting the portion and then heating and melting the portion to improve the defects of the metal structure of the metal material containing helium. As a result, the improvement and removal of defects of the metal structure can be achieved by reducing a helium content in the thermally working portion of the metal material.

Thermal working method of metal material containing helium and thermal

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Hitachi, Japan

Junya Kaneda