吉林大学学报(工学版) ›› 2010, Vol. 40 ›› Issue (增刊): 233-0238.

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Effects of current frequency on microstructure and wear resistance of composite coatings produced by microarc oxidation on aluminium alloy

YANG Yue1, LIU Yao-hui2   

  1. 1.Key Laboratory of Advanced Structural Materials, Ministry of Education, College of Materials Science and Engineering, Changchun University of Technology, Changchun 130012,China|2.College of Materials Science and Engineering, Jilin University, Changchun 130022,China
  • Received:2010-03-26 Online:2010-09-01 Published:2010-09-01

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Abstract:

To improve the surface wear resistance of the ceramic coating fabricated by microarc oxidation on aluminium alloy, ceramic coatings embedded with SiC nanoparticles at different current frequency (500, 700 and 900 Hz) were produced by adding SiC nanoparticles into electrolyte during MAO process. The morphology and phase composition of the coatings were investigated by Field Emission Scanning Electron Microscopy (FESEM) and Xray diffraction (XRD). The surface roughness of the coatings was characterized by Confocal Laser Scanning Microscope (CLSM). Simultaneously, the tribological properties of the composite coatings were evaluated by a universal materials tester (UMT). The results showed that the wear resistance of the ceramic coatings with SiC nanoparticles was improved significantly compared to the ceramic coatings without SiC nanoparticles. Furthermore, the composite coating formed at current frequency 900Hz showed the better wear resistance than the others.

Key words: aluminium alloy, microarc oxidation, SiC nanoparticles, wear resistance

CLC Number: 

  • TG113
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