Mitsubishi Heavy Industries Limited

Naoki Tokizane

Kazuhisa Shibue

Keiichi Shiraishi

Kazuo Murakami

Nozomu Kawasetsu

Yasuhiro Sakaguchi

Tatsumi Takahashi

Masanori Kimura

Tomikane Saida

Masayuki Hayakawa

Kouichiro Imakiire

Masatomo Shinohara

Yoshimasa Okubo

The present invention provides an aluminum composite material having neutron absorbing power that improves the ability to absorb neutrons by increasing the content of B, while also being superior to materials of the prior art in terms of mechanical properties and workability. The aluminum composite material having neutron absorbing power contains in Al or an Al alloy matrix phase B or a B compound having neutron absorbing power in an amount such that the proportion of B is 1.5% by weight or more to 9% by weight or less, and the aluminum composite material has been pressure sintered.

Aluminum composite material having neutron-absorbing ability

There is disclosed a high heat resistant aluminum alloy impeller, which is suitably used as an impeller, especially for a centrifugal compressor, and for the rotor and the blade of a turbo molecular pump or the scroll of a scroll compressor. Also, a method for manufacturing this aluminum alloy impeller is disclosed. The impeller is composed of an Al--Fe rapid solidification aluminum alloy, which is produced by a spray forming process for spraying a molten metal with inert gas and rapidly solidifying the metal at a cooling speed of 10.sup.2 .degree. C./sec. or higher while simultaneously deposing the metal. The rapid solidification aluminum alloy is subjected to hot extrusion processing within a temperature range of 200.degree. C. to 600.degree. C. and further subjected to hot forging.

Aluminum alloy impeller and manufacturing method of the same

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Tokyo, Japan

Naoki Tokizane