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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Temperature Dependent Thermal Transport Across the Interfaces Between Cnt Array and Adjacent Layers

Get access (open in a dialog) DOI: 10.1615/IHTC15.nmm.008543
pages 5497-5505

Аннотация

This work uses 3ω thermometry to separate interface resistances with growth and opposing substrates for aligned MWCNT array between 280 and 380 K. The measured DLC-MWCNT and MWCNT-Si substrate thermal resistances range between 5-12 mm2 K W-1 and 0.8-2.1 mm2 K W-1, respectively. The temperature dependency of the measured heat capacity is well consistent with the predictions. The nonlinear temperature dependence of the interface resistance suggests an important role of phonon inelastic scattering including all the acoustic bands and greatly enhanced by the low frequency optical phonon bands with high velocity. The phonon transport physical mechanism of an isolated SWCNT well captures the temperature dependency of thermal capacity of the MWCNT array and only approximately captures the temperature dependency of thermal boundary resistance in the current experimental temperature range.