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Journal of Materials Science

, Volume 41, Issue 8, pp 2309–2317 | Cite as

Experimental investigation and modeling of effective thermal conductivity and its temperature dependence in a carbon-based foam

  • M. GrujicicEmail author
  • C. L. Zhao
  • S. B. Biggers
  • D. R. Morgan
Article

Abstract

The effects of test temperature and a graphitization heat treatment on thermal and thermo-mechanical properties of a carbon-based foam material called CFOAM® are investigated experimentally. Thermal diffusivity is determined using a laser flash method, heat capacity via the use of differential scanning calorimetry, while (linear) thermal expansion is measured using a dilatometric technique. Experimental results are next used to compute the effective thermal conductivity and the coefficient of thermal expansion as a function of test temperature. The computed thermal conductivity results are then compared with their counterparts obtained using our recent model. The agreement between the experiment-based and the model-based results is found to be fairly good only in the case when the graphitization temperature is high relative to the maximum test temperature and, hence, CFOAM® does not undergo a significant additional graphitization during testing. A potential use of CFOAM® as an insulation material in thermal protection systems for the space vehicles is discussed.

Keywords

Differential Scanning Calorimetry Thermal Diffusivity Test Temperature Effective Thermal Conductivity Space Vehicle 

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Copyright information

© Springer Science + Business Media, Inc. 2006

Authors and Affiliations

  • M. Grujicic
    • 1
    Email author
  • C. L. Zhao
    • 1
  • S. B. Biggers
    • 1
  • D. R. Morgan
    • 2
  1. 1.Department of Mechanical Engineering, Program in Materials Science and EngineeringClemson UniversityClemson
  2. 2.Touchstone Research Laboratory, Inc.Triadelphia

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