Preparation and Tribological Properties of Graphite-Containing Plasma Electrolytic Oxidation Coatings on Al Alloy

Qing Biao Li; Qing Wang; Jun Liang

doi:10.4028/www.scientific.net/AMR.1081.183

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1081Preparation and Tribological Properties of...

Preparation and Tribological Properties of Graphite-Containing Plasma Electrolytic Oxidation Coatings on Al Alloy

Abstract:

Graphite-containing plasma electrolytic oxidation (PEO) composite coatings were prepared on Al alloy using periodically constant voltage, with addition of graphite in silicate electrolyte. The surface and cross-sectional morphologies of the coatings were examined using scanning electron microscope (SEM), the composition of the coatings was investigated by X-ray diffraction (XRD) and Raman spectra, the tribological properties of the coatings were evaluated on a tribometer. The results show that friction-reducing PEO composite coatings on Al alloy can be prepared in graphite-dispersed electrolyte using periodically constant voltage, the yielded coatings exhibit relatively lower and more stable friction coefficient.

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Periodical:

Advanced Materials Research (Volume 1081)

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183-186

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1081.183

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Online since:

December 2014

Authors:

Qing Biao Li, Qing Wang, Jun Liang

Keywords:

Aluminium Alloy, Friction-Reducing Coatings, Graphite, Periodically Constant Voltage, Plasma Electrolytic Oxidation

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