Importance

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Abstract

A process for making a metal-matrix composite (MMC), includes a mixture of particulate ceramic powder with a liquid carrier, without addition of a binder, to prepare a slip having thixotropic properties. The slip is introduced in a substantially dense consistency into a casting mold which is then subjected to vibrations so as to separate the carrier from the ceramic particles and to allow the carrier to float upon the ceramic particles while at the same time compacting the slip to realize a ceramic preform of porous consistency having pores. After terminating the exposure of the casting mold to vibrations, the liquid carrier is removed and the preform is allowed to solidify in the casting mold, without exposure to any further compaction measures, such as sintering, pressing or the like, and the casting mold is maintained in a position of rest. Subsequently, matrix metal is poured into the casting mold to fill the pores of the preform.

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First Claim