Toyo Aluminum Kabushiki Kaisha

Sumitomo Electric Industries, Limited

Kohei Kubo

Jun Kusui

Akiei Tanaka

Takamasa Yokote

Takashi Watsuji

Fumiaki Nagase

Disclosed herein is an aluminum matrix composite powder comprising 1 to 40% by weight of ceramic particles dispersed in a matrix of aluminum-silicon alloy. The matrix of the composite may further comprise at least one of Cu, Mg and transition metals. The aluminum matrix composite is prepared by a rapid solidification. In the aluminum matrix composite, the ceramic particles are very uniformly dispersed in the matrix, thereby the improvement of mechanical properties of product prepared therefrom can be obtained.

Aluminum matrix composite powder

A hypereutectic aluminum-silicon alloy produced by a powder metallurgy technique disclosed herein comprises 12 to 50% by weight of silicon, 1.0 to 5.0% by weight of copper and 0.01 to 0.05% by weight of phosphorus, the content of Ca as an impurity being controlled to be 0.03% by weight or less. The hyereutectic aluminum-silicon alloy of the present invention is excellent in machinability and mechanical strength.

Hypereutectic aluminum-silicon alloys produced by powder metallurgy

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Gamo, Japan

Kohei Kubo