Process for producing preform for metal matrix composite

Details Process for producing preform for metal matrix composite Process for producing preform for metal matrix composite

1991-12-20

1994-10-11

Aftergut, Karen

Plastic and nonmetallic article shaping or treating: processes

Removal of liquid component or carrier through porous mold...

By direct application of vacuum or pneumatic pressure

164 97, 264113, 264510, 264517, 264255, B28B 126, B28B 152, B29C 4302

Patent

active

053545281

ABSTRACT:
A process for producing a preform having a buffer layer for use in compositing a metal matrix composite where the buffer layer is provided at a boundary between a composited portion and a non-composited portion of a metallic material in the metal matrix composite. The process includes subjecting a first dispersion including a liquid medium and a ceramic whisker homogeneously dispersed in the liquid medium to filtration under pressure to form a primary processed preform having a volume fraction of 12 to 30%, depositing on the primary processed preform a second dispersion including a liquid medium and, homogeneously dispersed therein, a binder and at least one member selected from the group consisting of a short fiber and a ceramic whisker, and drying the primary processed preform to form a buffer layer having a volume fraction lower than the volume fraction of the primary processed preform and in a range from 2 to 10%.

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