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Behaviour Analysis and Comparison of Tribological Characteristics of Electroless Ni–B Coating under Dry and Lubricated Condition

  • Santanu DuariEmail author
  • Arkadeb Mukhopadhyay
  • Tapan Kumar Barman
  • Prasanta Sahoo
Conference paper
Part of the Lecture Notes on Multidisciplinary Industrial Engineering book series (LNMUINEN)

Abstract

This study presents the deposition and tribological characterization of nickel–boron (Ni–B) coatings deposited by electroless technique on AISI 1040 steel specimens. Coated specimens are annealed (heat-treated) at 350 °C for 1 h. It is seen from scanning electron micrographs that the surface resembles a typical cauliflower-like appearance. A remarkable improvement in microhardness of the coatings takes place on annealing. Structural analysis of the coatings using X-ray diffraction technique reveals that Ni–B coatings exhibit amorphous nature in as-deposited condition. Upon annealing at 350 °C for 1 h, the coating turns crystalline due to phase transformation. Due to this, hardness of the coatings increases. The annealed coatings are subjected to tribological experiments on a pin-on-disc type tribotester under dry and lubricated conditions at various loads, rotational speed and duration of sliding. COF and wear depth are recorded. It is seen that COF decreases with an increase in load under dry and lubricated conditions. The wear depth is seen to increase as the load and speed increase under both the sliding conditions. The tribological characteristics of the coatings under dry and lubricated condition are compared by generating 3D surface plots of the coefficient of friction and wear characteristics. The worn surface morphologies mainly indicate abrasive wear under both the sliding conditions.

Keywords

Electroless Ni–B Hardness Roughness Friction Wear Dry and lubricated condition 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Santanu Duari
    • 1
    Email author
  • Arkadeb Mukhopadhyay
    • 1
  • Tapan Kumar Barman
    • 1
  • Prasanta Sahoo
    • 1
  1. 1.Department of Mechanical EngineeringJadavpur UniversityKolkataIndia

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