Powder metal processing
has been successfully applied to variety of metal matrix composites, the
most popular being aluminum-silicon carbide particulate reinforced materials.
These composites offer high stiffness (modulus), reduced thermal coefficient
of expansion with little effect on thermal conductivity or density. These
Al-SiC composites are being used for their structural stiffness and strength
in aircraft and sporting goods products, as well as in electronic thermal
management applications such as heat sinks. Manufacturing techniques require
cold isostatic pressing (CIP) to consolidate the powders, followed by hot
extrusion or hot forging to full density.
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