skip to main content

Title: Joining of porous silicon carbide bodies

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.
Authors:
 [1] ;  [1] ;  [2]
  1. (Worcester, MA)
  2. (Thompson, CT)
Publication Date:
OSTI Identifier:
867359
Report Number(s):
US 4921554
US patent application 07/250,018
DOE Contract Number:
86X-SB045C
Resource Type:
Patent
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
Country of Publication:
United States
Language:
English
Subject:
joining; porous; silicon; carbide; bodies; method; joining; porous; bodies; silicon; carbide; disclosed; entails; utilizing; aqueous; slip; similar; silicon; carbide; form; porous; bodies; including; sintering; aids; binder; initially; join; porous; bodies; composite; structure; subjected; cold; isostatic; pressing; form; joint; handling; strength; composite; structure; subjected; pressureless; sintering; form; final; strong; bond; optionally; sintering; structure; subjected; hot; isostatic; pressing; improve; joint; densify; structure; result; composite; structure; joint; indistinguishable; silicon; carbide; pieces; joins; strong bond; composite structure; composite structure; composite structure; porous silicon; silicon carbide; silicon carbide; silicon carbide; silicon carbide; hot isostatic; isostatic pressing; isostatic pressing; pressureless sintering; porous bodies; porous bodies; porous bodies; sintering aids; cold isostatic; carbide bodies /156/419/