THE MANUFACTURING METHOD FOR COMPOSITE MATERIAL WITH DIRECTIONAL PROPERTIES

摘要

PURPOSE: A method for manufacturing an oriented metallic composite material is provided to manufacture a one direction aligned preform using a discontinuous fiber reinforcement not using an inorganic binder. CONSTITUTION: The method comprises the steps of forming a silicon oil dispersion of ceramic reinforcement by mixing the ceramic reinforcement with the silicon oil; aligning the ceramic reinforcement consisting the dispersion to one direction by forming electric field in the silicon oil dispersion; forming a reinforcement agglomerate by suction filtering the silicon oil dispersion containing the one direction aligned ceramic reinforcement so that the silicon oil is removed from the silicon oil dispersion; manufacturing a dried preform by drying the resulting material after adjusting the reinforcement agglomerate to a desirable volume fraction; manufacturing a preform by heat treating the dried preform at a temperature of 800 to 850 deg.C for 20 to 40 minutes; and manufacturing a metallic composite material by melting a metal and infiltrating the metal inside the preform in the squeeze casting method.