Vls silicon carbide whisker reinforced metal matrix...

Details Vls silicon carbide whisker reinforced metal matrix... Vls silicon carbide whisker reinforced metal matrix...

B - Operations, Transporting

22

D

75/163, 22/175

B22D 19/14 (2006.01) B22D 18/02 (2006.01) C04B 35/56 (2006.01)

Patent

CA 2040499

TWG-P-3290 ABSTRACT A method for preparing vapor-liquid-solid silicon carbide whisker reinforced metal matrix composites by a squeeze casting process employing a primary pressure and then a hydrostatic pressure to form the reinforced composites. The process to make the composites comprises: 1) providing VLS silicon carbide whiskers in a mold cavity; 2) introducing a molten metal into the mold cavity; 3) subjecting the molten metal and VLS silicon carbide whiskers in the cavity to a primary pressure of about 100 psi to about 2000 psi to infiltrate the whiskers with the molten metal; 4) subsequently subjecting the VLS silicon carbide whiskers infiltrated with the molten metal to a hydrostatic pressure of about 10,000 psi to about 25,000 psi to produce a fully dense mass; and 5) solidifying the to form a composite. AH7/Applns

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