Mitsubishi Materials Corporation

Ji-bin Yang

Koji Hoshino

Toshihiko Saiwai

Koichi Kita

Kenji Orito

Shinichi Ohmori

Jun Katoh

Tadashi Sugihara

Masato Otsuki

Hitoshi Maruyama

Kazutoshi Inoue

Kazushi Yoshida

Isao Suzuki

A high quality porous aluminum body, which has excellent joint strength between the porous aluminum body and the aluminum bulk body, and a method of producing the porous aluminum complex, are provided. The porous aluminum complex () includes: a porous aluminum body () made of aluminum or aluminum alloy; and an aluminum bulk body () made of aluminum or aluminum alloy, the porous aluminum body () and the aluminum bulk body () being joined to each other. The junction () between the porous aluminum body () and the aluminum bulk body () includes a Ti&#x2014;Al compound. It is preferable that pillar-shaped protrusions () projecting toward the outside are formed on outer surfaces of one of or both of the porous aluminum body () and the aluminum bulk body (), and the pillar-shaped protrusions () include the junction ().

Porous aluminum complex and method of producing porous aluminum complex

A high-quality porous aluminum sintered compact, which can be produced efficiently at a low cost; has an excellent dimensional accuracy with a low shrinkage ratio during sintering; and has sufficient strength, and a method of producing the porous aluminum sintered compact are provided. The porous aluminum sintered compact is the porous aluminum sintered compact () that includes aluminum substrates () sintered to each other. The junction (), in which the aluminum substrates () are bonded to each other, includes the Ti&#x2014;Al compound () and the Mg oxide (). It is preferable that the pillar-shaped protrusions projecting toward the outside are formed on outer surfaces of the aluminum substrates (), and the pillar-shaped protrusions include the junction ().

Porous aluminum sintered compact and method of producing porous aluminum sintered compact

A porous aluminum heat exchanger including: a porous aluminum body in which aluminum substrates are sintered each other; and a bulk body, which is an aluminum bulk body made of aluminum or aluminum alloy is provided. Pillar-shaped protrusions projecting toward an outside are formed on outer surfaces of the aluminum substrates, and pores of the porous aluminum body are configured to form flow channels of a heat medium.

Porous aluminum heat exchange member

A porous aluminum sintered material is provided. The porous aluminum sintered material includes aluminum substrates sintered each other, wherein pillar-shaped protrusions projecting toward an outside are formed on outer surfaces of the aluminum substrates, the porous aluminum sintered material has junctions in which the aluminum substrates are bonded each other through the pillar-shaped protrusions, the junctions include a Ti&#x2014;Al compound, and a eutectic alloy phase including Al and Si is provided on surface layers of the junctions.

Porous aluminum sintered material and method of producing porous aluminum sintered material

A high-quality porous aluminum sintered compact, which can be produced efficiently at a low cost; has an excellent dimensional accuracy with a low shrinkage ratio during sintering; and has sufficient strength, and a method of producing the porous aluminum sintered compact are provided. The porous aluminum sintered compact is the porous aluminum sintered compact that includes aluminum substrates sintered each other. The junction, in which the aluminum substrates are bonded each other, includes the Ti&#x2014;Al compound and the eutectic element compound capable of eutectic reaction with Al. It is preferable that the pillar-shaped protrusions projecting toward the outside are formed on outer surfaces of the aluminum substrates, and the pillar-shaped protrusions include the junction.

This aluminum sintering material is an aluminum sintering material that is used for producing a porous aluminum sintered compact in which a plurality of aluminum base materials are sintered together, and the aluminum sintering material includes: the aluminum base materials; and a plurality of titanium powder particles fixed to outer surfaces of the aluminum base materials, wherein the titanium powder particles are composed of either one or both of metallic titanium powder particles and hydrogenated titanium powder particles.

Aluminum material for sintering, method for producing aluminum material for sintering, and method for producing porous aluminum sintered compact

This method for producing porous sintered aluminum includes: mixing aluminum powder with a sintering aid powder containing titanium to obtain a raw aluminum mixed powder; mixing the raw aluminum mixed powder with a water-soluble resin binder, water, and a plasticizer containing at least one selected from polyhydric alcohols, ethers, and esters to obtain a viscous composition; drying the viscous composition in a state where air bubbles are mixed therein to obtain a formed object prior to sintering; and heating the formed object prior to sintering in a non-oxidizing atmosphere, wherein when a temperature at which the raw aluminum mixed powder starts to melt is expressed as Tm (&#xb0; C.), a temperature T (&#xb0; C.) of the heating fulfills Tm&#x2212;10 (&#xb0; C.)&#x2266;T&#x2266;685 (&#xb0; C.).

Process for producing porous sintered aluminum, and porous sintered aluminum

A porous aluminum body having high porosity and a manufacturing method therefor are provided, wherein the porous aluminum body can be manufactured by continuous manufacturing steps. In the present invention, this porous aluminum body includes a plurality of aluminum fibers connected to each other. The aluminum fibers each have a plurality of columnar protrusions formed at intervals on an outer peripheral surface of the aluminum fibers, the columnar protrusions protruding outward from the outer peripheral surface. Adjacent aluminum fibers are integrated with the aluminum fibers and the columnar protrusions.

Porous aluminum body and manufacturing method therefor

This porous aluminum sintered compact is a porous aluminum sintered compact in which a plurality of aluminum base materials are sintered together, and a Ti&#x2014;Al-based compound is present in bonding portions at which the aluminum base materials are bonded together. It is preferable that a plurality of columnar protrusions protruding outwards are formed on an outer surface of the aluminum base material and the bonding portions are present at the columnar protrusions.

Porous aluminum sintered compact

This method for producing porous sintered aluminum includes: mixing aluminum powder with a sintering aid powder containing a sintering aid element to obtain a raw aluminum mixed powder; forming the raw aluminum mixed powder into a formed object prior to sintering having pores; and heating the formed object prior to sintering in a non-oxidizing atmosphere to produce porous sintered aluminum, wherein the sintering aid element is titanium, and when a temperature at which the raw aluminum mixed powder starts to melt is expressed as Tm (&#xb0; C.), then a temperature T (&#xb0; C.) of the heating fulfills Tm-10 (&#xb0; C.)&#x2266;T&#x2266;685 (&#xb0; C.).

This method for producing an aluminum composite including porous sintered aluminum, includes: mixing aluminum powder with a sintering aid powder containing either one or both of titanium and titanium hydride to obtain a raw aluminum mixed powder; adding and mixing a water-soluble resin binder, water, a plasticizer containing at least one selected from polyhydric alcohols, ethers, and esters, and a water-insoluble hydrocarbon-based organic solvent containing five to eight carbon atoms into the raw aluminum mixed powder to obtain a viscous composition; shape-forming the viscous composition on an aluminum foil or an aluminum plate and causing the viscous composition to foam to obtain a formed object prior to sintering; and heating the formed object prior to sintering in a non-oxidizing atmosphere to obtain an aluminum composite which includes porous sintered aluminum integrally joined onto the aluminum foil or the aluminum plate, wherein when a temperature at which the raw aluminum mixed powder starts to melt is expressed as Tm (&#xb0; C.), then a temperature T (&#xb0; C.) of the heating fulfills Tm-10 (&#xb0; C.)&#x2266;T&#x2266;685 (&#xb0; C.).

Process for production of aluminum complex comprising sintered porous aluminum body

A first tungsten-based sintered material of the present invention comprises Ni in a range from 0.2 to 1.5% by mass, YOin a range from 0.1 to 1% by mass, and optionally, (a) VC in a range from 0.05 to 0.5% by mass and/or (b) Co and/or Fe in a range from 0.01 to 5% by mass, the balance being tungsten (W); W phases are sinter-bonded; Ni phase or Ni&#x2014;Co/Fe alloy phase which has the largest particle diameter of 5 &#x3bc;m or less and YOhaving the largest particle diameter of 5 &#x3bc;m or less are distributed at boundaries of the W phases; and the largest particle diameter of the W phase is 30 &#x3bc;m or less. The first tungsten-based sintered material is preferably used for a hot press mold for optical glass lenses.

Tungsten-based sintered material having high strength and high hardness, and hot press mold used for optical glass lenses

A shaft having a magnetostrictive sensor measures torque applied to a shaft, as a shaft, without contact and utilizing reverse-magnetostrictive properties of magnetic alloys. The shaft includes a plurality of magnetic alloy layers, and the magnetosensitive torque detector is variously formed by diffusion bonding a magnetostrictive layer with a high magnetostrictive constant onto the shaft surface, by heat treating, adhesive fixation or the like bonding means. Methods for making the shaft are disclosed.

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Kitamoto, Japan

Ji-bin Yang