Journal of Materials Engineering and Performance

, Volume 26, Issue 4, pp 1551–1561 | Cite as

The Microstructure and Wear Resistance of Microarc Oxidation Composite Coatings Containing Nano-Hexagonal Boron Nitride (HBN) Particles

  • Zhenwei Li
  • Shichun Di


The composite coatings containing HBN were prepared on 2024 aluminum alloy by microarc oxidation in the electrolyte with nano-HBN particles. The microstructure, surface roughness, phase composition, hardness, adhesion strength and wear resistance of composite coatings were analyzed by SEM, EDS, laser confocal microscope, XRD, Vickers hardness tester, scratch test and ball-on-disc abrasive tests. The results revealed that composite coatings were mainly composed of γ-Al2O3, α-Al2O3, mullite and HBN. With increasing the content of HBN particles in the electrolyte, the size and number of the pores on the surface of composite coatings decreased significantly. Compared to the MAO coatings without HBN, the composite coatings exhibited better wear resistance, as demonstrated by the lower friction coefficient and the lower wear rate.


2024 aluminum alloy adhesion strength composite ceramic coatings microarc oxidation nano-HBN particles wear resistance 



The authors gratefully acknowledge the Micro/Nano Technology Research Center, Harbin Institute of Technology for Device support. This research did not receive any specific grant from funding agencies in the public, commercial or not-for-profit sectors.


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Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.School of Mechatronics EngineeringHarbin Institute of TechnologyHarbinPeople’s Republic of China

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