Composite material for heat dissipating plate and method of production of same
AssigneeNippon Light Metal Company, Ltd.
InventorsKaoru Ishido, Hideki Ishii, Shigehisa Watanabe, Hisashi Hori
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Abstract
There is provided a composite material for a heat dissipating plate which achieves both a high thermal conductivity and a low coefficient of thermal expansion and has a performance satisfactory as a heat dissipating plate and a method of production of a composite material which can produce the composite material at a low cost. For this reason, powder metallurgy is used to produce the composite material for a heat dissipating plate. The composite material for a heat dissipating plate which is fabricated by this method of production contains an aluminum alloy and silicon carbide. The particles of silicon carbide are in contact with each other.
Claims4
A method of production of a composite material for a heat dissipating plate, the method comprising:
- a mixing step of mixing a powder of an Al—Si alloy and particles of silicon carbide to obtain a mixture,
- a heating step of heating the mixture filled in an aluminum mold at a temperature of a liquidus temperature of said Al—Si alloy to 650° C. in an atmosphere of air, and
- a forging step of forging the mixture in a semi-molten state where the aluminum alloy is a molten state,
- wherein the particles of silicon carbide contact each other.
Dependencies are inferred from the claim text.