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Four advances in carbon-carbon materials technology

Author
Maahs, Howard G.
Published
Feb 1, 1994.
Physical Description
1 electronic document
Additional Creators
Kowbel, Witold and Vaughn, Wallace L.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
Carbon-carbon composites are a specialty class of materials having many unique properties making these composites attractive for a variety of demanding engineering applications. Chief among these properties are exceptional retention of mechanical properties at temperatures as high as 4000 F, excellent creep resistance, and low density (1.6 to 1.8 g/cu cm). Although carbon-carbon composites are currently in service in a variety of applications, much development work remains to be accomplished before these materials can be considered to be fully mature, realizing their full potential. Four recent technology advances holding particular promise for overcoming current barriers to the wide-spread commercialization of carbon-carbon composites are described. These advances are: markedly improved interlaminar strengths (more than doubled) of two dimensional composites achieved by whiskerization of the fabric reinforcing plies, simultaneously improved oxidation resistance and mechanical properties achieved by the incorporation of matrix-phase oxidation inhibitors based on carborane chemistry, improved oxidation resistance achieved by compositionally graded oxidation protective coatings, and markedly reduced processing times (hours as opposed to weeks or months) accomplished through a novel process of carbon infiltration and coatings deposition based on the use of liquid-phase precursor materials.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19940025976.
Accession ID: 94N30481.
NASA, Washington, Technology 2003: The Fourth National Technology Transfer Conference and Exposition, Volume 1; p 361-370.
Terms of Use and Reproduction
No Copyright.
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