High temperature resistant cermet and ceramic compositions

Details High temperature resistant cermet and ceramic compositions High temperature resistant cermet and ceramic compositions

1977-12-08

1978-12-26

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75205, 75206, 75212, 75226, 264 60, C22C 2900

Patent

active

041314590

ABSTRACT:
Cermet compositions having high temperature oxidation resistance, high hardness and high abrasion and wear resistance, and particularly adapted for production of high temperature resistant cermet insulator bodies, comprising a sintered body of particles of a high temperature resistant metal or metal alloy, preferably molybdenum or tungsten particles, dispersed in and bonded to a solid solution formed of aluminum oxide and silicon nitride, and particularly a ternary solid solution formed of a mixture of aluminum oxide, silicon nitride and aluminum nitride. Also disclosed are novel ceramic compositions comprising a sintered solid solution of aluminum oxide, silicon nitride and aluminum nitride.
The cermet compositions are designed particularly to provide high temperature resistant refractory coatings on metal substrates, preferably molybdenum or tungsten substrates.

REFERENCES:
patent: 3526485 (1970-09-01), Dawihl et al.
patent: 3900626 (1975-08-01), Brennan
patent: 3914500 (1975-10-01), Prennan et al.

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