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 Wm(-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.

Simoncini, A., Tagliaferri, V., & Ucciardello, N. (2017). High thermal conductivity of copper matrix composite coatings with highly-aligned graphite nanoplatelets. MATERIALS, 10(11), 1226 [10.3390/ma10111226].

High thermal conductivity of copper matrix composite coatings with highly-aligned graphite nanoplatelets

SIMONCINI, ALESSANDRO;Tagliaferri V.;Ucciardello N.
2017

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 Wm(-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.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ING-IND/16 - Tecnologie e Sistemi di Lavorazione
English
anisotropy phonon thermal conductivity; graphite nanoplatelets; metal matrix composite coating (MMCC); polarized Raman spectroscopy; thermal analysis
Simoncini, A., Tagliaferri, V., & Ucciardello, N. (2017). High thermal conductivity of copper matrix composite coatings with highly-aligned graphite nanoplatelets. MATERIALS, 10(11), 1226 [10.3390/ma10111226].
Simoncini, A; Tagliaferri, V; Ucciardello, N
Articolo su rivista
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/194962
Citazioni
  • ???jsp.display-item.citation.pmc??? 3
  • Scopus 16
  • ???jsp.display-item.citation.isi??? 16
social impact