Hitachi Metals, Ltd.

Hideya Yamane

Hirohisa Suwabe

Makoto Okai

Masahide Kawabata

Masaru Yoshida

Tomomasa Kumagai

Tsunehiro Kawata

Ryoichi Shibata

Osamu Tokudome

Hideki Yamaura

Kenichiro Sekiguchi

Takao Kaneuchi

Kazutoshi Sugie

Tomomi Souda

Provided is a method for producing a boron nitride nanotube-reinforced aluminum composite casting, the method being capable of reducing cost. The method for producing a boron nitride nanotube-reinforced aluminum composite casting comprises the steps of: (a) mixing boron nitride nanotubes and a first aluminum matrix and then pelletizing the resulting mixture; (b) heating and subjecting pellets obtained in step (a) to melt mixing to obtain a melt; (c) cooling and solidifying the melt obtained in step (b) to obtain a master batch; and (d) subjecting the master batch obtained in step (c) and the second aluminum matrix to melt mixing, and then cooling and solidifying the resulting mixture.

Method for producing boron nitride nanotube-reinforced aluminum composite casting

A ceramic honeycomb structure having a large number of flow paths partitioned by porous cell walls, the cell walls comprising at least main crystals of aluminum titanate, in which MgO and SiOare dissolved to form a solid solution, and glass phases, the glass phases containing 40-80% by mass of SiOand 1-20% by mass of MgO, the average size of the glass phases being 30 &#x3bc;m or less in a cross section of the cell walls, and the area ratio of the glass phases to the total area of the main crystals of aluminum titanate and the glass phases being 2-12% in a cross section of the cell walls, and its production method.

Aluminum-titanate-based ceramic honeycomb structure, its production method, and starting material powder for producing same

In a ceramic honeycomb structure having large numbers of flow paths partitioned by porous cell walls, the cell walls have a porosity of 55-75%, with an average pore diameter Da of 10-30 &#x3bc;m and a pore area ratio Sa of 10-30% on their surfaces, and the average length La of the pores at their openings and the average width Lb of the pores at depth La from the surfaces of the cell walls meet the condition of 1.1&#x3c;Lb/La&#x3c;5 in an arbitrary vertical cut surface of the cell walls. In the cordierite-based ceramic honeycomb structure, the ceramic contains Fe and a spinel, the amount of the spinel being 4% or less by an X-ray diffraction intensity ratio, and most of the spinel having particle sizes in a range of 0.01-5 &#x3bc;m.

Ceramic honeycomb structure and moldable material usable for its extrusion molding

The present invention relates to a die casting method in order to obtain aluminum alloy having high quality and excellent mechanical characteristics. Further, the present invention relates to a die casting method to produce such an aluminum alloy casting, wherein primary crystal of molten metal is substantially granulated in a casting sleeve so as to form a semi-molten status, and then filled under pressure into a die cavity and solidified, so that molten metal flow becomes laminar flow, thus making less air mixing, and casting can be made without oxides and solidified matter being filled into die cavity.

Die casting method

Growing community of inventors

Moka, Japan

Hideya Yamane