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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/033/04/0483-0489

    • Keywords

       

      D-Gun sprayed coating; porosity; stellite-6; Cr3C2–NiCr; erosion.

    • Abstract

       

      In the present investigation, stellite-6, Cr3C2–NiCr and WC–Co–Cr coatings were deposited by DGun on a hot rolled 21Cr–4Ni–N steel meant for fabrication of hydro turbine underwater parts. The coatings have been characterized for microstructure, porosity, microhardness and crystalline nature. The erosion experiments were carried out using an air jet erosion test rig at a velocity of 120 ms-1 and impingement angles of 30° and 90°. Silicon carbide particles of size ranging between 500 and 700 𝜇m were used as erodent. Scanning electron microscopy (SEM) technique was used to analyse the nature and mechanism of erosion. Erosion behaviour is observed to be influenced largely by the nature and extent of porosity in the surface coatings.

    • Author Affiliations

       

      Akhilesh K Chauhan1 D B Goel1 S Prakash1

      1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, India

    • Dates

       
      Published
      August 2010
      Manuscript received
      21 February 2008

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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