High temperature ceramic material suitable for gas turbine appli

Details High temperature ceramic material suitable for gas turbine appli High temperature ceramic material suitable for gas turbine appli

1975-03-06

1978-01-31

Poer, J.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 732, 106 734, 106 735, C04B 3558

Patent

active

040713717

ABSTRACT:
A method of making improved SIALON ceramics without the need for hot pressing, is disclosed. A homogeneous slip is prepared from Si.sub.3 N.sub.4, Al.sub.2 O.sub.3 and Y.sub.2 O.sub.3 in the presence of a suspension agent; Y.sub.2 O.sub.3 being present in at least 1% by weight (preferably between 1-25%) and Al.sub.2 O.sub.3 being present in the range 16-40% by weight (preferably 16-18%). The slip is cast and dehydrated. The cast shape is reaction sintered at about 1550.degree.-1700.degree. C (preferably 1600.degree. C) for no less than 3 hours (preferably between 3-12 hours).

REFERENCES:
patent: 3830652 (1974-08-01), Gazza
patent: 3837871 (1974-09-01), Weaver
patent: 3969125 (1976-07-01), Komeya et al.

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