Barrier materials for making metal matrix composites

Details Barrier materials for making metal matrix composites Barrier materials for making metal matrix composites

1994-07-28

1996-04-09

Bradley, P. Austin

Metal founding

Process

Shaping liquid metal against a forming surface

164 98, B22D 1902, B22D 1900

Patent

active

055052487

ABSTRACT:
The present invention relates to a novel process for forming metal matrix composite bodies by using a barrier material. Particularly, an infiltration enhancer or an infiltration enhancer precursor or an infiltrating atmosphere are in communication with a filler material or a preform, at least at some point during the process, which permits molten matrix metal to spontaneously infiltrate the filler material or preform up to the barrier material. Such spontaneous infiltration occurs without the requirement for the application of any pressure or vacuum. Accordingly, shaped metal matrix composite bodies can be produced having superior surface finish.

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