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Indexed by:期刊论文

Date of Publication:2008-06-15

Journal:APPLIED SURFACE SCIENCE

Included Journals:SCIE、EI

Volume:254

Issue:16

Page Number:5089-5094

ISSN No.:0169-4332

Key Words:nanocomposite; corrosion resistance; thermal conductivity

Abstract:Homogeneous CuO/SiO(2) and NiO/SiO(2) nanocomposite coatings containing CuO and NiO nanoparticles in silica matrix were successfully synthesized by sol-gel process on an aluminum alloy substrate, respectively. The evolution of phase and morphology of both nanocomposites was characterized by XRD, SEM, TEM and FTIR. The effect of incorporating various nanoparticles on the corrosion behavior and the thermal conductivity of nanocomposite coatings was investigated by potentiodynamic polarization curve and comparative exponential method. The thermal conductivity as well as the corrosion resistance of nanocomposite coatings was significantly improved by the introduction of metal oxide particles. In comparison with NiO/SiO(2) nanocomposite coatings, CuO/SiO(2) composite coatings displayed lower protective behavior as well as higher thermal conductivity. Experimental results revealed that those improvements can directly be related to the nanocomposite effect and the nature of added nanoparticles. (C) 2008 Elsevier B.V. All rights reserved.