C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/128
C04B 33/32 (2006.01) C04B 35/58 (2006.01) C04B 35/64 (2006.01)
Patent
CA 1116379
REFRACTORY METAL DIBORIDE ARTICLES BY COLD PRESSING AND SINTERING ABSTRACT OF THE DISCLOSURE A method of making articles of Group IVb metal diboride powder by cold pressing and sintering is disclosed. Group IVb metal diboride powder is pressed in a mold substantially below sintering temperatures to form a cold pressed green piece having substantially uniform compaction over its major surfaces. The piece is enclosed but not confined in a thermally conductive receptacle which has been pre-fired to remove volatile impurities, and the enclosed piece sintered without the simultaneous application of pressure. The powder and green piece are maintained under inert atmosphere before and during sintering. The method is particularly useful for the production of flat plates, where warpage during sintering may otherwise be a problem.
301560
Borden Ladner Gervais Llp
Ppg Industries Inc.
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