Stock material or miscellaneous articles – Self-sustaining carbon mass or layer with impregnant or...
Reexamination Certificate
2011-08-02
2011-08-02
Sample, David R (Department: 1783)
Stock material or miscellaneous articles
Self-sustaining carbon mass or layer with impregnant or...
Reexamination Certificate
active
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.
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Ohta Hiroshi
Otani Yo
Sato Hideaki
Sonobe Naohiro
Kureha Corporation
Miller Daniel
Sample David R
Wenderoth , Lind & Ponack, L.L.P.
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