In-plane thermal conductivity in thin carbon fiber composites

Carlos Silva, Egidio Marotta, Michael Schuller, Larry Peel, Mark O'Neill

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The objective of this study was to determine whether fiber type, fiber angle, and filler material affected the in-plane thermal conductivity of thin (7-15 mils thickness) carbon fiber composites. Two sets of samples were tested: low thermal conductivity samples made with polyacrylonitrile-based fibers (k = 6.8 W/m · K) in Fiberglast epoxy resin, and high thermal conductivity samples fabricated with coal-pitch-based fibers (k = 620 W/m · K) in cyanate ester resin. Samples were fabricated from 0/90 woven cloths and warped to obtain a range of fiber-pattern angles from 25/ -25 to 65/ -65. The filler effect on thermal conductivity was evaluated on additional samples prepared with 10% volume fraction of graphite powder in the matrix. Thermal conductivity of the low thermal conductivity samples was in the range of 15-20 W/m · K and showed up to a 15% improvement when the angle of the fibers was varied. High thermal conductivity samples showed thermal conductivities between 60 and 150 W/m · K, with an improvement up to 60% when the angle of the fibers relative to the heat flux direction was changed from 0/90 to 25/ -25. The samples with graphite powder did not show any enhancement in thermal performance. As potential alternatives, unidirectional tape and eGraf's Spreadershield® foils were also tested, showing good thermal performance.

Original languageEnglish
Pages (from-to)460-467
Number of pages8
JournalJournal of Thermophysics and Heat Transfer
Volume21
Issue number3
DOIs
Publication statusPublished - Jul 2007
Externally publishedYes

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fiber composites
carbon fibers
thermal conductivity
fibers
fillers
graphite
cyanates
polyacrylonitrile
epoxy resins
coal
resins
tapes
esters
heat flux
foils
augmentation
matrices

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

In-plane thermal conductivity in thin carbon fiber composites. / Silva, Carlos; Marotta, Egidio; Schuller, Michael; Peel, Larry; O'Neill, Mark.

In: Journal of Thermophysics and Heat Transfer, Vol. 21, No. 3, 07.2007, p. 460-467.

Research output: Contribution to journalArticle

Silva, Carlos ; Marotta, Egidio ; Schuller, Michael ; Peel, Larry ; O'Neill, Mark. / In-plane thermal conductivity in thin carbon fiber composites. In: Journal of Thermophysics and Heat Transfer. 2007 ; Vol. 21, No. 3. pp. 460-467.
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