Ceramacast 673 high-temperature, thermally conductive ceramic molding compound is engineered to produce complex, large-diameter diamond drill bits for the oil drilling industry.
The two-part chemical-setting compound produces molds for powder metallurgical sintering applications up to 2,450°F. The silicon carbide composition provides high thermal conductivity and low coefficient of thermal expansion, ensuring dimensional stability during rapid heating and quenching of molds. The powder base and liquid activator are mixed in a typical ratio of 100 parts base to 25 parts activator, offering a pot life of 20-30 min and set time of 1 hr for quick turnaround production. Fully hardened by step curing for 1-2 hr at 200° and 250°F, the cured material demonstrates shrinkage of 0.3 percent and compressive strength of 5,000 psi.
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