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Materials 2017, 10(11), 1226; https://doi.org/10.3390/ma10111226

High Thermal Conductivity of Copper Matrix Composite Coatings with Highly-Aligned Graphite Nanoplatelets

Department of Enterprise Engineering “Mario Lucertini”, University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy
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Received: 7 September 2017 / Revised: 18 October 2017 / Accepted: 23 October 2017 / Published: 25 October 2017
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Abstract

Nanocomposite coatings with highly-aligned graphite nanoplatelets in a copper matrix were successfully fabricated by electrodeposition. For the first time, the disposition and thermal conductivity of the nanofiller has been evaluated. The degree of alignment and inclination of the filling materials has been quantitatively evaluated by polarized micro-Raman spectroscopy. The room temperature values of the thermal conductivity were extracted for the graphite nanoplatelets by the dependence of the Raman G-peak frequency on the laser power excitation. Temperature dependency of the G-peak shift has been also measured. Most remarkable is the global thermal conductivity of 640 ± 20 W·m−1·K−1 (+57% of copper) obtained for the composite coating by the flash method. Our experimental results are accounted for by an effective medium approximation (EMA) model that considers the influence of filler geometry, orientation, and thermal conductivity inside a copper matrix. View Full-Text
Keywords: graphite nanoplatelets; polarized Raman spectroscopy; anisotropy phonon thermal conductivity; metal matrix composite coating (MMCC); thermal analysis graphite nanoplatelets; polarized Raman spectroscopy; anisotropy phonon thermal conductivity; metal matrix composite coating (MMCC); thermal analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Simoncini, A.; Tagliaferri, V.; Ucciardello, N. High Thermal Conductivity of Copper Matrix Composite Coatings with Highly-Aligned Graphite Nanoplatelets. Materials 2017, 10, 1226.

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