Due to the high intrinsic thermal conductivity of carbon allotropes, there have been many attempts to incorporate such structures into existing thermal abatement technologies. In particular, carbon nanotubes (CNTs) and graphitic materials (i.e., graphite and graphene flakes or stacks) have garnered much interest due to the combination of both their thermal and mechanical properties. However, the introduction of these carbon-based nanostructures into thermal abatement technologies greatly increases the number of interfaces per unit length within the resulting composite systems. Consequently, thermal transport in these systems is governed as much by the interfaces between the constituent materials as it is by the materials themselves. This paper reports the behavior of phononic thermal transport across interfaces between isotropic thin films and graphite substrates. Elastic and inelastic diffusive transport models are formulated to aid in the prediction of conductance at a metal-graphite interface. The temperature dependence of the thermal conductance at Au-graphite interfaces is measured via transient thermoreflectance from 78 to 400 K. It is found that different substrate surface preparations prior to thin film deposition have a significant effect on the conductance of the interface between film and substrate.
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e-mail: duda@virginia.edu
e-mail: pehopki@sandia.gov
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Heat Transfer In Nanochannels, Microchannels, And Minichannels
Prediction and Measurement of Thermal Transport Across Interfaces Between Isotropic Solids and Graphitic Materials
John C. Duda,
John C. Duda
Department of Mechanics and Aerospace Engineering, University of Virginia, Charlottesville, VA 22904
e-mail: duda@virginia.edu
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Patrick E. Hopkins
Patrick E. Hopkins
Engineering Sciences Center, Sandia National Laboratories, Albuquerque, NM 87185
e-mail: pehopki@sandia.gov
Search for other works by this author on:
John C. Duda
Department of Mechanics and Aerospace Engineering, University of Virginia, Charlottesville, VA 22904
e-mail: duda@virginia.edu
Patrick E. Hopkins
Engineering Sciences Center, Sandia National Laboratories, Albuquerque, NM 87185
e-mail: pehopki@sandia.gov
J. Heat Transfer. Feb 2012, 134(2): 020910 (7 pages)
Published Online: December 22, 2011
Article history
Received:
November 1, 2010
Revised:
May 11, 2011
Online:
December 22, 2011
Published:
December 22, 2011
Citation
Norris, P. M., Smoyer, J. L., Duda, J. C., and Hopkins, P. E. (December 22, 2011). "Prediction and Measurement of Thermal Transport Across Interfaces Between Isotropic Solids and Graphitic Materials." ASME. J. Heat Transfer. February 2012; 134(2): 020910. https://doi.org/10.1115/1.4004932
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