Production method of dispersion-strengthened composite materials

摘要

PURPOSE:To easily manufacture a composite material excellent in homogeneity and soundness, by regarding the sum of the solid-phase percentage of metal and the volume percentage of reinforcement as the total solid-phase percentage and by detecting this total solid-phase percentage as change in viscosity so as to control viscosity at the time of dispersing a reinforcement in a metal in solid-liquid coexisting state. CONSTITUTION:At the time of manufacturing a composite material by dispersing a reinforcement in a matrix metal in a solid-liquid coexisting state, the total solid- phase percentage in a slurry can be regarded as the sum of the volume percentage of primary crystals in the slurry and that of the reinforcement. As a result, the total solid-phase percentage of the slurry has a direct relationship with the viscosity of the slurry, so the total solid-phase percentage can be measured by substituting solid- phase percentage for viscosity by measurement of viscosity. In this way, the change in solid-phase percentage attendant upon a change in temp. and the change in apparent solid-phase percentage due to a change in reinforcement-adding speed can be directly detected at the same time when a viscosity detector is provided to a part of a agitating device, so that a highly accurate detection can be maintained.