Accession Number : ADA308144

Title :   High Thermal Conductivity Carbon/Carbon Composites.

Descriptive Note : Final technical rept. 16 Oct 92-31 Aug 95,

Corporate Author : CLEMSON UNIV SC DEPT OF CHEMICAL ENGINEERING

Personal Author(s) : Edie, Dan D.

PDF Url : ADA308144

Report Date : 30 SEP 1995

Pagination or Media Count : 16

Abstract : The objective of this project was to develop a low-cost, high thermal conductivity carbon/carbon composite with a mesophase pitch-based matrix. A low cost, continuous powder coating process was developed which allows the production of a flexible pre-impregnated pitch-based powder. This process was used to produce towpreg from AR mesophase pitch powder and three different carbon fibers: T300 PAN-based fiber, P55 pitch-based fiber, and an experimental high thermal conductivity pitch-based fiber. The thermal conductivities parallel to the fibers of the graphitized T300/AR-120 and P55/AR-120 composites was 80.5 and 135.5 W/m-K, respectively. The ribbon fiber enforced composites exhibited thermal conductivities parallel to the fiber and transverse to the fiber of 145 and 213.5 W/m-K, respectively. This indicates fiber shape can affect matrix properties. A finite element model was developed to predict the thermal conductivity of carbon/carbon composites, both parallel and transverse to the fiber direction, composed of isotropic and anisotropic materials. The model was able to accurately predict the average thermal conductivity of the composites made in this study. p2

Descriptors :   *CARBON CARBON COMPOSITES, *THERMAL CONDUCTIVITY, MATHEMATICAL MODELS, PRODUCTION, LOW COSTS, MATERIALS, POWDERS, FINITE ELEMENT ANALYSIS, SHAPE, ACRYLONITRILE POLYMERS, CARBON FIBERS, PHASE, COATINGS, ANISOTROPY, ISOTROPISM, CONTINUOUS PROCESSING, PITCH(MATERIAL).

Subject Categories : Laminates and Composite Materials
      Inorganic Chemistry
      Electricity and Magnetism
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE