In the present work, rheological behavior of tungsten carbide (WC) slurries was evaluated to utilize it in gel-casting process, and effects of dispersant quantity and solids content on the viscosity of WC slurries were examined. It was found that tri-ammonium citrate to WC powder ratio of 0.25 was a preferable dispersant in such a non-toxic system. Maximum allowable WC powder was 25vol.% in the slurry. The slurry with 25vol.% WC powder and gelation additives was prepared, cast and dried at room temperature, then it was pre-sintered at 1450°C for 4h. Scanning electron microscope (SEM) micrograph of the pre-sintered WC foam showed a uniform porous microstructure. It had enough strength to be infiltrated with Zr 2 Cu molten. A reactive melt infiltration occurred during the practice, resulting in the formation of about 58vol.%W and 42vol.% ZrC in the final microstructure.