Abstract
1. Sintered hard alloys are capable of absorbing both liquid metals which wet well and partially dissolve their refractory phases and metals which do not wet their carbide constituents. 2. The degree of absorption of liquid metals by sintered composites is determined primarily by the properties of the binder metals and refractory phases; the necessary condition for migration is good wetting and partial dissolution of the refractory phase by the binder metal. 3. The hypothesis is advanced that the mechanism by which liquid metals are absorbed by sintered hard alloys involves the simultaneous influence of three factors: 1) a disjoining pressure set up by adsorbed cobalt layers in the carbide particle contact zones; 2) capillary forces acting on the specimen surface; 3) recrystallizatlon of the refractory phase.
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