A precision molded article, such as a die cavity, is made by combining granules of a refractory and granules of a first metal or alloy which has a homogeneous crystalline appearance at a temperature below its melting point and has a lower Rockwell Hardness than the refractory, mixing the granules with...http://www.google.com/patents/US4327156?utm_source=gb-gplus-sharePatent US4327156 - Infiltrated powdered metal composite article
