Metal matrix composite, and preparation method thereof

摘要

The present invention provides a preparation method of a metal matrix composite. The method comprises the following steps of: 1) pulverizing a solid carbon material to a micrometer size; 2) plastic deforming a metal matrix powder and dispersing the pulverized nanometer-sized carbon material into the metal matrix powder during the plastic deformation; 3) integrating the metal/carbon nano-material composite powder obtained in step 2) by using a hot forming process; and 4) heat treating the integrated bulk material at a predetermined temperature to form a composite having a metal-carbon nanophase, a metal-carbon nanoband formed by growth of the metal-carbon nanophase, or a metal-carbon nano-network structure formed by self-coupling of the metal-carbon nanoband.

主权项

1. A method of manufacturing an aluminum matrix composite, the method comprising the steps of:
pulverizing a solid carbon material into a micrometer size, the solid carbon material being at least one selected from a group consisting of fullerene, carbon nano tube, graphite, carbon black and amorphous carbon; plastically deforming aluminum matrix powders while dispersing the pulverized carbon material into the aluminum matrix powders so as to be dispersed in a nanometer size , thereby obtaining composite powders composed of aluminum/carbon nano material; integrating the composite powders composed of aluminum/carbon nano material, thereby producing a bulk material; and heat-treating the bulk material, thereby forming a composite having therein at least one of aluminum-carbon nano phase particles that are formed by carbons released as a carbon-carbon bonding of the carbon material is broken and aluminum elements of the aluminum matrix, aluminum-carbon nano strips produced by growing-up of the aluminum-carbon nano phase particles, and an aluminum-carbon nano network structure produced by self-assembly of the nano strips, wherein in the aluminum matrix composite, dislocations are fixed around the aluminum-carbon nano phase particles, or grains of the aluminum matrix are micronized or growing-up thereof is inhibited due to the aluminum-carbon nano strips or the aluminum-carbon nano network structure, and wherein the aluminum matrix composite does not contain a carbon compound (Al4C3) caused by the carbons.