Sumikin Bussan Corporation

Osamu Matsuzono

Toshiyuki Watanabe

Kazuya Sato

Takashi Yoshida

Toshitaka Sakurai

Yoko Matsushita

Kouki Shimizu

Masafumi Matsushita

Ayumi Shindo

Yumiko Kubota

Akiko Matsushita

Kunio Saito

Takumi Shitara

Takayoshi Misaki

Futoshi Yanagino

Takashi Mizushima

Setsuko Shindo

Kazuaki Sato

A duplex eutectic silicon alloy including 30-70 weight % silicon, 10-45 weight % nitrogen, 1-40 weight % aluminum, and 1-40 weight % oxygen has a eutectic structure comprising a &#x3b2;'-sialon phase and an &#x3bf;&#x2032;-sialon phase. The alloy is produced by controlling cooling at a rate of 50&#xb0; C. or less per minute in combustion synthesis. A ductile sintered product capable of replacing steel in various applications can be produced by placing a compact composed of a powder of the alloy in a sintering furnace which can supply a heat quantity at least ten times the heat capacity of the compact; and sintering the compact at a pressure at least as great as atmospheric pressure, within a nitrogen atmosphere in which the silicon gas mole fraction is 10% or more, and at a temperature within the range from 1400&#xb0; C. to 1700&#xb0; C.

Duplex eutectic silicon alloy, manufacturing method thereof, and manufacturing method of sintered compact using silicon alloy powder

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Saitama, Japan

Osamu Matsuzono