Microstructures and Mechanical Properties of TiCP/Al-4.5Cu-0.8Mg Composites by Direct Reaction Synthesis
Microstructures and Mechanical Properties of TiCp／A1-4.5Cu-0.8Mg Composites by Direct Reaction Synthesis

Direct reaction synthesis (DRS), based on the principle of self-propagating high-temperature synthesis (SHS), is a new method for preparing particulate metal matrix composites. TiCP/Al-4.5Cu-0.8Mg composites were fabricated by DRS. Particulate composites were fabricated with Ti carbide (TiC) particles, generally less than 1.0μm. The reacted, thermal extruded samples exhibit a homogeneous distribution of fine TiC particles in Al-4.5Cu-0.8Mg matrix. Mechanical property evaluation of the composites has revealed a very high tensile strength relative to the matrix alloy. Fractographic analysis indicates ductile failure.