Thermal boundary conductance between refractory metal carbides and diamond

The thermal boundary conductance (TBC) between thin films of Cr, Mo, Nb and W and diamond substrates has been measured using time domain thermoreflectance before and after a high-vacuum heat treatment at 800 degrees C for 2 h. While no signs of carbide formation could be detected in as-deposited layers by scanning transmission electron microscopy energy dispersive X-ray spectroscopy elemental analysis, the heat treatment led to partial (W,Mo) or full conversion (Cr,Nb) of the film into carbide. The measured TBC values on as-deposited samples of 315, 220, 220 and 205 MW m (-2) K (-1) measured for, respectively, the Cr, Mo, Nb and W samples, were found to not be significantly altered by the heat treatment. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.


Published in:
Acta Materialia, 73, 337-346
Year:
2014
Publisher:
Oxford, Elsevier
ISSN:
1359-6454
Keywords:
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 Record created 2014-08-29, last modified 2018-09-13

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