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Thermophysical ESEM Characterization of Carbon FibersCoefficients of thermal expansion (CTE) of carbon fibers create residual stresses in aggressive manufacturing and service environments. In this effort, environmental scanning electron microscope (ESEM) is used for in situ observations of a carbon fiber cross-section up to 1000 C in order to evaluate the much neglected transverse CTE. The perimeter of fiber cross-section is calculated with the Scion image processing program from images that were taken at every 100 C increments. CTE values are calculated by linear regression of the strain data based on the perimeter changes. Furthermore, through SEM, WDS and TEM observations, we are in the process of bringing an interactive rationale between CTE, crystallinity and surface roughness of carbon fibers.
Document ID
20020052188
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Sue, Jiwoong
(Texas A&M Univ. United States)
Ochoa, Ozden O.
(Texas A&M Univ. United States)
Effinger, Michael R.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Munafo, Paul M.
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Subject Category
Composite Materials
Meeting Information
Meeting: 26th Annual Conference on Composites, Materials, and Structures
Location: Cocoa Beach, FL
Country: United States
Start Date: January 28, 2002
End Date: January 31, 2002
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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