Molded ceramic articles and production method thereof

Details Molded ceramic articles and production method thereof Molded ceramic articles and production method thereof

1994-09-01

1996-12-31

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Consolidation of powder prior to sintering

419 10, 419 16, 419 17, 419 19, 419 32, 419 37, 419 42, 419 57, 419 58, B22F 312

Patent

active

055903886

ABSTRACT:
A method of producing a molded ceramic article comprises the first step mixing powdery raw materials and a liquid additive, thereby obtaining a mixed raw material, the second step press-molding the mixed raw material obtained in the first step in a hydrostatically applied condition of pressure, thereby removing an excess of the liquid additive to obtain a preform, and the third step calcining the preform obtained in the second step to obtain a molded ceramic article. The molded ceramic article comprises, as a principal component, copper and, as essential components, Cr and Ni within composition ranges of 0.1.ltoreq.Cr<2 wt. % and 0.1.ltoreq.Ni<10 wt. % and further at least one additive component selected from the group consisting of the following composition ratios: the following composition ratios: 0<Fe<5 wt. %, 0.ltoreq.Co<5 wt. %, 0.ltoreq.Al<10 wt. %, 0.ltoreq.Ti<20 wt. %, 0.ltoreq.Mo<3 wt. %, 0.ltoreq.Si<3 wt. %, 0.ltoreq.V<3 wt. %, 0.ltoreq.Mg<1 wt. %, and 0.ltoreq.C<5 wt. %, and has at least one composition range selected from the group consisting of the following composition ratios: 0<O.sub.2 <10 wt. %, 0<N.sub.2 <5 wt. % and 0<B<10 wt. %.

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