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Orbiter Reinforced Carbon-Carbon Advanced Sealant Systems: Screening TestsOxidation protection for the Orbiter reinforced carbon-carbon (RCC consists of three components: silicon carbide coating, tetraethyl orthosilicate (TEOS) impregnated into the carbon substrate and a silicon based surface sealant (designated Type A). The Orbiter Type A sealant is being consumed each mission, which results in increased carbon-carbon substrate mass loss, which adversely impacts the mission life of the RCC components. In addition, the sealant loss in combination with launch pad contamination (salt deposit and zinc oxide) results in RCC pinholes. A sealant refurbishment schedule to maintain mission life and minimize affects of pin hole formation has been implemented in the Orbiter maintenance schedule. The objective of this investigation is to develop an advanced sealant system for the RCC that extends the refurbishment schedule by reducing sealant loss/pin hole formation and that can be applied to existing Orbiter RCC components. This paper presents the results of arc jet screening tests conducted on several sealants that are being considered for application to the Orbiter RCC.
Document ID
20000101071
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Curry, Donald M.
(NASA Johnson Space Center Houston, TX United States)
Lewis, Ronad K.
(NASA Johnson Space Center Houston, TX United States)
Norman, Ignacio
(Boeing North American, Inc. Houston, TX United States)
Chao, Dennis
(Boeing North American, Inc. Houston, TX United States)
Nicholson, Leonard S.
Date Acquired
August 19, 2013
Publication Date
January 1, 2000
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: 24th Annual Conference on Composites, Materials and Structures
Location: Cocoa Beach, FL
Country: United States
Start Date: January 24, 2000
End Date: January 28, 2000
Funding Number(s)
PROJECT: RTOP 260-10-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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