Metal matrix composite bodies utilizing a crushed polycrystallin

Details Metal matrix composite bodies utilizing a crushed polycrystallin Metal matrix composite bodies utilizing a crushed polycrystallin

1994-09-09

1996-07-30

Straub, Gary P.

Stock material or miscellaneous articles

Metal continuous phase interengaged with nonmetal continuous...

428545, 428614, C22C 109

Patent

active

055410049

ABSTRACT:
The present invention relates to a novel method for forming metal matrix composite bodies and novel metal matrix composite bodies produced thereby. Particularly, a polycrystalline oxidation reaction product of a parent metal and an oxidant is first formed. The polycrystalline oxidation reaction product is thereafter comminuted into an appropriately sized filler material which can be placed into a suitable container or formed into a preform. The filler material or preform of comminuted polycrystalline oxidation reaction product is thereafter placed into contact with a matrix metal alloy in the presence of an infiltration enhancer, and/or an infiltration enhancer precursor and/or an infiltrating atmosphere, at least at some point during the process, whereupon the matrix metal alloy spontaneously infiltrates the filler material or preform. As a result of utilizing comminuted or crushed polycrystalline oxidation reaction product, enhanced infiltration (e.g., enhanced rate or amount) is achieved. Moreover, novel metal matrix composite bodies are produced.

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