Actions for Process modifications for improved carbon fiber composites : Alleviation of the electrical hazards problem

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Process modifications for improved carbon fiber composites : Alleviation of the electrical hazards problem

Author
Ramohalli, K.
Published
Jun 15, 1980.
Physical Description
1 electronic document
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
Attempts to alleviate carbon-fiber-composite electrical hazards during airplane crash fires through fiber gasification are described. Thermogravimetric and differential scanning calorimetric experiments found several catalysts that caused fibers to combust when composites were exposed to test fires. Composites were tested in the 'Burn-Bang' apparatus and in high voltage electrical detection grid apparatus. In a standard three minute burn test modified composites released no fibers, while state-of-the-art composites released several hundred fiber fragments. Expected service life with and without catalytic modification was studied and electron microscopy and X-ray microanalysis furnished physical appearance and chemical composition data. An acrylic acid polymer fiber coating was developed that wet the carbon fiber surface uniformly with the catalyst, providing a marked contrast with the uneven coats obtained by solution-dipping.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19800024986.
Accession ID: 80N33494.
NASA-CR-163631.
JPL-PUB-80-56.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15721078