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