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EFFECTS OF α-Al2O3NANOADDITIVE ON THE PROPERTIES OF CERAMIC COATINGS PREPARED IN BORATE ELECTROLYTE BY MICRO-ARC OXIDATION

Author

Listed:
  • H. X. LI

    (College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)

  • H. H. ZHU

    (College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)

  • X. WU

    (School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)

  • Z. G. JI

    (College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)

Abstract

Ceramic coatings have been synthesized on 6063 aluminum alloy by micro-arc oxidation (MAO) technique in the solution ofNa2B4O7electrolyte with and without α-Al2O3nanoadditive. Effects of α-Al2O3nanoadditive on the phase composition, micro-structure, micro-hardness, adhesion and wear resistance of the prepared ceramic coatings have been investigated in this paper. The phase composition and microstructure of the MAO coatings were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDX) analyses, respectively. Micro-hardness, adhesion and tribological and wear tests were also performed. The results showed that the α-Al2O3nanoadditive doped in the electrolyte had great influence on the structural and mechanical properties of the ceramic coatings.

Suggested Citation

  • H. X. Li & H. H. Zhu & X. Wu & Z. G. Ji, 2012. "EFFECTS OF α-Al2O3NANOADDITIVE ON THE PROPERTIES OF CERAMIC COATINGS PREPARED IN BORATE ELECTROLYTE BY MICRO-ARC OXIDATION," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 19(04), pages 1-6.
  • Handle: RePEc:wsi:srlxxx:v:19:y:2012:i:04:n:s0218625x12500382
    DOI: 10.1142/S0218625X12500382
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