Joining of porous silicon carbide bodies

Details Joining of porous silicon carbide bodies Joining of porous silicon carbide bodies

1988-09-27

1990-05-01

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

264 60, 264 65, 419 5, 419 14, 419 42, 419 51, 419 68, B32B 1800

Patent

active

049215540

ABSTRACT:
A method of joining two porous bodies of silicon carbide is disclosed. It entails utilizing an aqueous slip of a similar silicon carbide as was used to form the porous bodies, including the sintering aids, and a binder to initially join the porous bodies together. Then the composite structure is subjected to cold isostatic pressing to form a joint having good handling strength. Then the composite structure is subjected to pressureless sintering to form the final strong bond. Optionally, after the sintering the structure is subjected to hot isostatic pressing to further improve the joint and densify the structure. The result is a composite structure in which the joint is almost indistinguishable from the silicon carbide pieces which it joins.

REFERENCES:
patent: 4070197 (1978-01-01), Coes
patent: 4419161 (1983-12-01), Hailey
patent: 4526649 (1985-07-01), Gupta et al.
patent: 4541975 (1985-09-01), Honma et al.
patent: 4707312 (1987-11-01), Bajaj
Letters: Joining of Dense Silicon Carbide by Hot-Pressing, T. Iseki et al., Journal of Materials Science 15 (1980), pp. 1049-1050.

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