Method of producing metal base composite material under promotion of matrix metal infiltration by fine pieces of third material

Abstract From the Canadian patent

In producing a metal base composite material by first producing a porous preform from a reinforcing material such as short fibers, whisker, particles or mixtures thereof and secondly, infiltrating a molten matrix metal into the interstices of the porous preform, fine pieces of a third material having good affinity to the molten matrix metal are mixed in the porous preform in the process of producing the preform and at least a, part of the preform is contacted with a molten mass of the matrix metal so that the molten matrix metal infiltrates into the interstices of the porous preform with no substantial pressure being applied thereto.