Agency of Industrial Science and Technology

Shinko Kosen Kogyo Kabushiki Kaisha

Shigeru Akiyama

Hidetoshi Ueno

Kazuo Kobayashi

Ichitaro Ogawa

Hisayoshi Yoshida

Tsuyoshi Hagio

Akira Kitahara

Sumio Nagata

Kenji Miyazaki

Kazuo Morimoto

Masao Itoh

Koji Imagawa

Tooru Nishikawa

A foamed metal which has an apparent specific gravity of from 0.2 to 0.8 and comprises an aggregate of polygonal closed cells of from 2 to 10 mm in average diameter. The foamed metal is not only light in weight, free of directionality and structurally strong but also excellent in sound-absorbing and electromagnetic shielding properties, and is useful as constructional, structural or functional material. A method for producing the foamed material comprises adding calcium as a thickening agent to molten aluminum or alloy thereof in an amount of from 0.2 to 8% by weight, followed by agitating to adjust the viscosity of the melet, then adding from 1 to 3% by weight of powdered titanium hydride as a foaming agent to the melt, and agitating the melt to effect foaming.

Foamed metal and method of producing same

Disclosed herein is a heat resistant vaned stirrer for use in a high temperature atmosphere. To endure stirring operations in high temperature molten metals of 300.degree.-1200.degree. C., the stirrer vanes are formed of a carbon-ceramics composite material which is produced from coke powder blended with 10-50% by volume of ceramics powder and which has a bending strength higher than 200 kg/cm.

Vaned stirrer for use in high temperature atmosphere

Growing community of inventors

Tosu, Japan

Shigeru Akiyama