Process for the preparation of a heat-resistant and wear resista

Details Process for the preparation of a heat-resistant and wear resista Process for the preparation of a heat-resistant and wear resista

1991-01-14

1993-03-23

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 93, 501105, 51309, 252520, C04B 3556

Patent

active

051963850

ABSTRACT:
A process for preparation of heat-resistant and wear-resistant ceramic material which comprises sintering the material under a non-oxidizing atmosphere until the metal of a component (a) no longer exists as a metallic phase. A starting composition for forming the ceramic material comprises from 1 to 40 wt % of Al.sub.2 O.sub.3, from 0.05 to 8 wt % of sintering assistant, from 3 to 35 wt % total of one or both of ZrO.sub.2 and HfO.sub.2, and from 17 to 95.95 wt % of carbide components (a) and (b), or (a), (b), and (c), wherein component (a) is one or more metals selected from the Groupd IVB, VB, and VIB of the Periodic Table; component (b) is TiC, and component (c) is one or more metal carbides selected from Zr, Hf, and metals of Groups VB and VIB of the Periodic Table.

REFERENCES:
patent: 3565643 (1971-02-01), Bergna
patent: 3886254 (1975-05-01), Tanaka et al.
patent: 4331048 (1982-05-01), Dworak et al.
patent: 4419311 (1983-12-01), Claussen et al.
patent: 4506024 (1985-03-01), Claussen et al.
patent: 4804645 (1985-02-01), Ekstrom

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