Evaluation of W–Cu metal matrix composites produced by powder injection molding and liquid infiltration

The near net shape processing of tungsten–copper metal matrix composites by powder injection molding and liquid copper infiltration was studied in this paper. In this technique, powder injection molded bimetallic components were produced. The component was debinded and subsequently heated to an elevated temperature. This facilitated the sintering of the high melting point metal and the liquidation of the lower melting point for infiltration into the preform of the former. Feasibility of this method in the manufacture of tungsten–copper metal matrix composites with high percentage copper, up to 38 wt.%, was demonstrated and mechanical properties were evaluated in this study.