Preparing complex shapes of ultra-high density silicon...

Details Preparing complex shapes of ultra-high density silicon... Preparing complex shapes of ultra-high density silicon...

B - Operations, Transporting

28

B

25/133

B28B 3/00 (2006.01) C04B 35/00 (2006.01)

Patent

CA 1063325

PREPARING COMPLEX SHAPES OF ULTRA-HIGH DENSITY SILICON NITRIDE AND SILICON CARBIDE BY A HOT ISOSTATIC GAS POWDER VEHICLE ABSTRACT OF THE DISCLOSURE A method is presented for the production of complex shapes of ultra-high density silicon nitride and silicon carbide materials. This method consists of embedding low density complex pre-formed objects in an inert powder vehicle. The inert powder vehicle is then placed in a deformable container. The deformable container is sealed and evacuated, whereupon the container is isostatically compressed in a pressure vessel by a hot gas. The pressure exerted in this manner is uniform on all surfaces of the complex pre-formed objects due the compression of the container and transmission therethrough of the pressure by the powder vehicle. This technique is especially useful in the production of oxidation resistant high temperature strength gas turbine blades.

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