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Title: Method for forming fibrous silicon carbide insulating material

A method whereby silicon carbide-bonded SiC fiber composites are prepared from carbon-bonded C fiber composites is disclosed. Carbon-bonded C fiber composite material is treated with gaseous silicon monoxide generated from the reaction of a mixture of colloidal silica and carbon black at an elevated temperature in an argon atmosphere. The carbon in the carbon bond and fiber is thus chemically converted to SiC resulting in a silicon carbide-bonded SiC fiber composite that can be used for fabricating dense, high-strength high-toughness SiC composites or as thermal insulating materials in oxidizing environments.
Inventors:
 [1]
  1. (Oak Ridge, TN)
Issue Date:
OSTI Identifier:
865241
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
Patent Number(s):
US 4481179
Contract Number:
W-7405-ENG-26
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
Country of Publication:
United States
Language:
English
Subject:
method; forming; fibrous; silicon; carbide; insulating; material; whereby; carbide-bonded; sic; fiber; composites; prepared; carbon-bonded; disclosed; composite; treated; gaseous; monoxide; generated; reaction; mixture; colloidal; silica; carbon; black; elevated; temperature; argon; atmosphere; bond; chemically; converted; resulting; fabricating; dense; high-strength; high-toughness; thermal; materials; oxidizing; environments; argon atmosphere; silicon monoxide; insulating material; elevated temperature; silicon carbide; composite material; fiber composite; thermal insulating; carbon black; fiber composites; oxidizing environments; carbon bond; sic fiber; composite mat; method whereby; oxidizing environment; /423/501/