Process for strengthening silicon based ceramics

Patent · Fri Jan 01 00:00:00 EST 1993

OSTI ID:875156

Kim, Hyoun-Ee ^[1]; Moorhead, A. J. ^[2]

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1. Oak Ridge, TN
2. Knoxville, TN

A process for strengthening silicon based ceramic monolithic materials and omposite materials that contain silicon based ceramic reinforcing phases that requires that the ceramic be exposed to a wet hydrogen atmosphere at about 1400.degree. C. The process results in a dense, tightly adherent silicon containing oxide layer that heals, blunts , or otherwise negates the detrimental effect of strength limiting flaws on the surface of the ceramic body.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84OR21400
• Assignee: United States of America as represented by Department of Energy (Washington, DC)
• Patent Number(s): H001166
• Application Number: 07/665854
• OSTI ID: 875156
• Resource Relation: Patent File Date: 1991 Mar 07
• Country of Publication: United States
• Language: English

Related Subjects

process
strengthening
silicon
based
ceramics
monolithic
materials
reinforcing
phases
exposed
wet
hydrogen
atmosphere
dense
tightly
adherent
oxide
layer
heals
blunts
otherwise
negates
detrimental
effect
strength
limiting
flaws
surface
silicon based
oxide layer
hydrogen atmosphere
strengthening silicon
wet hydrogen
statutory invention registration
/427/