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Directly susceptible, noncarbon metal ceramic composite crucible

United States Patent

5,997,802
December 7, 1999
View the Complete Patent at the US Patent & Trademark Office
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A sintered metal ceramic crucible suitable for high temperature induction melting of reactive metals without appreciable carbon or silicon contamination of the melt. The crucible comprises a cast matrix of a thermally conductive ceramic material; a perforated metal sleeve, which serves as a susceptor for induction heating of the crucible, embedded within the ceramic cast matrix; and a thermal-shock-absorber barrier interposed between the metal sleeve and the ceramic cast matrix to allow for differential thermal expansions between the matrix and the metal sleeve and to act as a thermal-shock-absorber which moderates the effects of rapid changes of sleeve temperature on the matrix.
Holcombe, Jr.; Cressie E. (Farragut, TN), Kiggans, Jr.; James O. (Oak Ridge, TN), Morrow; S. Marvin (Kingston, TN), Rexford; Donald (Pattersonville, NY)
The United States of America as represented by the United States (Washington, DC)
09/ 199,313
November 25, 1998
The United States Government has rights to this invention pursuant to Contract No. DE-AC05-96OR22464 with Lockheed Martin Energy Systems, Inc., awarded by the U.S. Department of Energy.