B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
25/140
B22F 3/12 (2006.01) C22C 1/10 (2006.01)
Patent
CA 1090542
ABSTRACT OF THE DISCLOSURE A composite material consisting of particles of a sintered metal-ceramic, supported in a metal matrix is pro- duced by packing a mold with sintered particles having a larger average particle size than those desired in the final composite and particles of the matrix metal. A controlled quantity of heat is then applied to the mass to bring the temperature of the matrix metal above its melting temperature and above the degradation temperature of the sintered particles. The surfaces of the sintered particles in contact with the metal are degradated by de-sintering, diffusion and solution into the molten metal reducing the size of the particles. The heat source is removed before the particles have been reduced in size to their final desired size so that the mass cools and upon solidification the particles have reached their desired final particle size. In the final composite the remaining particles are surrounded by zones of an alloy of the matrix metal and the dissolved constituents of the sintered particles.
310592
Permanence Corporation
Smart & Biggar
LandOfFree
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