Support member for high-temperature heat-treated metal...

Stock material or miscellaneous articles – Self-sustaining carbon mass or layer with impregnant or...

Reexamination Certificate

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Reexamination Certificate

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07989066

ABSTRACT:
A carbonaceous support member for a high-temperature heat-treated metal molding object, particularly a setter for heat-treatment in powder metallurgy, is formed as a carbon-ceramic composite shaped product having a bulk density of 1.2-1.6 g/ml and including a carbonaceous matrix and 3-20 wt. % of ceramic particles which are uniformly dispersed in the carbonaceous matrix and partly exposed to the surface of the composite. The support member can effectively prevent carburization of a metal molding object supported thereby during the heat-treatment without causing a problem of peeling of coating layer as encountered in a ceramic-coated support member. The support member may be prepared by compression molding of a powdery mixture of a fine carbon precursor and ceramic particles, followed by heating at 1000-2000° C. to carbonize the fine carbon precursor.

REFERENCES:
patent: 5531943 (1996-07-01), Sudani et al.
patent: 6629884 (2003-10-01), Goers
patent: 2003/0178357 (2003-09-01), Wolff et al.
patent: 56-17985 (1981-02-01), None
patent: 7-89769 (1995-04-01), None
patent: 7-216406 (1995-08-01), None
patent: 8-198685 (1996-08-01), None
patent: 2002-154875 (2002-05-01), None

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