The growing demand for high-temperature alloys has led to the need for increasingly more refractory mold materials for the lost-wax process. These materials must sustain their chemical, as well as their mechanical, stability in order to produce high-quality castings. This paper initially outlines the mold requirements for a number of high-temperature alloys. Ceramic-liquid metal interactions, oxygen affinity, as well as aqueous solution chemistry for multi-component refractory systems will be discussed. Next, guidelines in practical mold design for the above alloys will be outlined.

Authors:Dr. Helmut Frye, D.H. Sturgis, Dr. M. Yasrebi