Other

Hi-lex Corporation

Kurimoto, Ltd.

Gohsyu Co., Ltd.

Yazaki Corporation

Hokkaido University

Kondoh, Katsuyoshi

Nippon Steel Cement Co., Ltd.

Toudai Tld, Ltd.

Katsuyoshi Kondoh

Yoshisada Michiura

Tomohiro Kanazawa

Satoru Yoshinaga

Shuji Shiozaki

Bunshi Fugetsu

Jinsun Liao

Akihiko Koshi

Kantaro Kaneko

Yasufumi Otsuka

Yoshinori Goho

Kazunori Fukumoto

Shigeru Nishigori

Toru Akita

Mitsuhiro Goto

Hitoshi Kanbara

Makoto Hotta

Hajime Agata

Junko Umeda

Hideaki Fukui

Katsuhito Itakura

Seunghyun Na

Norio Fujii

Nana Nishikawa

Hirohito Kametani

An nitrogen solid solution titanium sintered compact includes a matrix made of a titanium component having an &#x3b1;-phase, nitrogen atoms dissolved as a solute of solid solution in a crystal lattice of the titanium component, and metal atoms dissolved as a solute of solid solution in the crystal lattice of the titanium component.

Nitrogen solid solution titanium sintered compact and method for producing same

An aluminum-based composite material includes a plurality of coarse crystalline grains () of pure aluminum, and a plurality of fine crystalline grains () each having an aluminum matrix (), and a dispersion material () dispersed inside the aluminum matrix and formed by reacting a portion or all of an additive with aluminum in the aluminum matrix. The fine crystalline grains exist among the coarse crystalline grains, and the fine crystalline grains have crystalline grain diameters smaller than crystalline grain diameters of the coarse crystalline grains.

Aluminum-based composite material and method for producing the same

An oxygen solid solution titanium sintered compact includes a matrix made of a titanium component having an &#x3b1;-phase, oxygen atoms dissolved as a solute of solid solution in a crystal lattice of the titanium component, and metal atoms dissolved as a solute of solid solution in the crystal lattice of the titanium component.

Oxygen solid solution titanium material sintered compact and method for producing same

A Ti&#x2014;Fe-based sintered alloy material including two phases of an &#x3b1; phase and a &#x3b2; phase, in which a content of iron is 0.5% or more and 7% or less on a weight basis, a &#x3b2; phase containing an iron component is dispersed in an independent state in an &#x3b1; phase, an area ratio of the &#x3b2; phase containing an iron component is 60% or less of an entire area, and an equiaxed crystal grain is contained in the &#x3b1; phase.

Ti&#x2014;Fe-based sintered alloy material and method for producing same

The cementitious material for a radioactive waste disposal facility includes base cement, and porous and amorphous silica powder. The amount of the silica powder in the entire cementitious material ranges from 35% to 65% on a mass basis.

Cementitious material for radioactive waste disposal facility

A method for producing titanium powder containing a solid-soluted oxygen comprises the steps of: heating titanium powder comprised of titanium particles in an oxygen-containing atmosphere in a temperature range of 160&#xb0; or higher and less than 600&#xb0; C. to form a titanium oxide layer on the surface of the titanium particle; and heating the titanium powder having the titanium oxide layer in an oxygen-free atmosphere in a temperature range of 450&#xb0; C. or higher and a melting point of the titanium oxide layer or lower to decompose the titanium oxide layer on the surface of the titanium particle so that oxygen atoms dissociated form a solid solution in a matrix of the titanium particle.

Titanium powder, titanium material, and method for producing titanium powder containing solid-soluted oxygen

A method for producing titanium powder containing a solid-soluted nitorogen comprises the step of heating titanium powder comprised of titanium particles in a nitrogen-containing atmosphere to dissolve nitrogen atoms and form a solid solution of nitrogen atom in a matrix of the titanium particle.

Titanium powder containing solid-soluted nitrogen, titanium material, and method for producing titanium powder containing solid-soluted nitrogen

A production method of an extrusion billet includes a step of preparing a plate or lump starting material comprising a magnesium alloy, a step of performing a plastic deformation process at a rolling reduction of 70% or more to the starting material at a temperature of 250&#xb0; C. or lower to introduce a strain without generating dynamic recrystallization, a step of producing powder by granulating the material after the plastic deformation process, and a step of producing a powder billet by compressing the powder.

Production method of extrusion billet and production method of magnesium alloy material

A method for producing a composite metal material includes preparing a solution containing a surfactant having both hydrophilicity and hydrophobicity, dispersing a nanosized to micro-sized fine carbonaceous substance into a state of being monodispersed in the solution, bringing the solution having the dispersed fine carbonaceous substance into contact with surface of a metal powder particle, drying the metal powder particle to make the fine carbonaceous substance in the monodispersed state adhere to the surface of the metal powder particle via a component of the solution, and thermally decomposing and removing the solution component adhering to the surface of the metal powder particle by heat-treating the metal powder particle either in a hydrogen-containing reducing atmosphere or in a vacuum atmosphere to partially expose the surface of the metal powder particle out of the adhering fine carbonaceous substance, and thus progress diffusion and sintering among the metal powder particles through exposed parts.

Composite metal material and method for producing the same

A method for producing a high strength workpiece material includes the steps of: placing an alloy materialinto a central space of a cylindrical mold; vertically compressing both end faces of the material in the central space with a press memberand a first support member, thereby causing one lengthwise end of the material to flow radially outward along an end face of the cylindrical moldto form an expanded part; bringing the press memberinto contact with a lengthwise end face of the expanded part so as to press the expanded part against the end face of the cylindrical mold; and increasing the distance between the press memberand the end face of the cylindrical moldwhile decreasing the distance between the press memberand the first support member, thereby continuously causing the radially outward flow from one end to another end of the material to gradually increase the thickness of the expanded part.

High strength workpiece material and method and apparatus for producing the same

A production method of amorphous silicon oxide powder comprises a step of preparing a wood, agricultural crop or plant containing hexose and/or pentose and silicon oxide as a starting raw material, a step of hydrolyzing the starting raw material with nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid or organic acid to reduce a content of the hexose to 10% by weight or less and/or a content of the pentose to 20% by weight or less, and a step of burning residue yielded in the hydrolyzing step at a temperature of 400&#xb0; C. to 1200&#xb0; C.

Method of making amorphous silicon powder

A production method of amorphous silica comprises a step of preparing organic waste containing silicon oxide as a starting material, a step of immersing the organic waste in a carboxylic acid aqueous solution having a hydroxyl group, a step of washing the organic waste in water, and a step of heating the organic waste in the air atmosphere.

Amorphous silica and its manufacturing method

A high-strength and high-toughness magnesium based alloy contains, by weight, 1 to 8% rare earth element and 1 to 6% calcium and the maximum crystal grain diameter of magnesium constituting a matrix is not more than 30 &#x3bc;m. At least one intermetallic compound () of rare earth element and calcium has a maximum grain diameter of 20 &#x3bc;m or less and it is dispersed in a crystal grain boundary () and a crystal grain () of magnesium of the matrix.

High-strength and high-toughness magnesium based alloy, driving system part using the same and manufacturing method of high-strength and high-toughness magnesium based alloy material

When starting raw material powder is passed through a pair of rolls (), plastic working is applied to the starting raw material powder, and the crystal grain diameter of a metal or alloy constituting a matrix of the powder particle after processed is miniaturized. According to the thus provided alloy powder raw material, the maximum size of the powder particle is not more than 10 mm and the minimum size of the powder particle is not less than 0.1 mm, and the maximum crystal grain diameter of the metal or alloy constituting the matrix of the powder particle is not more than 30 &#x3bc;m.

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Minoh, Japan

Katsuyoshi Kondoh