Method of forming metal matrix composites by use of an immersion

Details Method of forming metal matrix composites by use of an immersion Method of forming metal matrix composites by use of an immersion

1993-10-13

1995-01-03

Bradley, P. Austin

Metal founding

Process

Shaping liquid metal against a forming surface

164101, 164103, 164104, 164105, B22D 1914

Patent

active

053777417

ABSTRACT:
The present invention relates to a novel method for forming metal matrix composite bodies. Particularly, a permeable mass of filler material is formed into a preform. An infiltration enhancer or an infiltration enhancer precursor or an infiltrating atmosphere are also in communication with the preform, at least at some point during the process, which permits molten matrix metal to spontaneously infiltrate the preform when the preform is placed into the molten matrix metal. A means for maintaining the preform at least partially below the surface of the molten matrix metal can also be utilized. In a preferred embodiment a reservoir may be employed to supply a second metal which has a different composition from the first source of matrix metal. By using a reservoir metal which is different in composition then the first source of matrix metal, it is possible to tailor the properties of the metal within the metal matrix composite body to meet various operating requirements and thus tailor the properties of the metal matrix composite body itself.

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