Articles
  • Influence of codeposited Al2O3 and h/BN on tribological properties of Ni-Al2O3-h/BN composite coatings

  • Jin-Hyuk Choia, Gobinda Gyawalib,*, Dhani Ram Dhakalc, Sami Bin Humamc, Bhupendra Joshib and Soo Wohn Leec,*

  • aResearch Center for Eco Multifunctional Nano Materials, Sun Moon University, Asan, Korea
    bDepartment of Fusion Science and Technology, Sun Moon University, Asan, Korea
    cDepartment of Environmental and Bio-Chemical Engineering, Sun Moon University, Asan, Korea

Abstract

Ni-Al2O3-h/BN composite coatings were prepared by dispersing different contents of Al2O3 nanoparticles and h/BN nanosheets in the plating bath. The prepared composite coatings were then characterized for surface morphology, surface roughness, elemental composition, Vickers microhardness, X-ray diffraction, and wear and coefficient of friction test by using modern instruments. Compared to the nickel coating, composite coatings have revealed an increase in Vickers microhardness, improved surface roughness, and tribological properties. Increasing the h/BN content into the deposit improved the coefficient of friction, whereas increase in Al2O3 content improved wear rate. Among the different samples, the composite coating prepared by dispersing 10 g/L of each Al2O3 nanoparticles and h/BN nanosheets improved both wear and coefficient of friction under dry condition. In addition, the coefficient of friction was also investigated under different loadings during the wear test. The result showed that the lowest coefficient of friction was observed at 5 N load.


Keywords: Ni-Al2O3-h/BN composite coating, Hardness, Wear, Coefficient of friction

This Article

  • 2020; 21(2): 249-255

    Published on Apr 30, 2020

  • 10.36410/jcpr.2020.21.2.249
  • Received on Dec 25, 2019
  • Revised on Mar 30, 2020
  • Accepted on Apr 2, 2020

Correspondence to

  • Gobinda Gyawali b and Soo Wohn Lee c

  • bDepartment of Fusion Science and Technology, Sun Moon University, Asan, Korea
    cDepartment of Environmental and Bio-Chemical Engineering, Sun Moon University, Asan, Kore
    Tel : +82-41-530-2882 Fax: +82-41-530-2840

  • E-mail: ggobinda@sunmoon.ac.kr, swlee@sunmoon.ac.kr