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Slurry erosion performance of CeO2-modified Ni–WC coatings

Surajit Purkayastha (Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, India)
Dheerendra Kumar Dwivedi (Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, India)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 3 June 2014

168

Abstract

Purpose

This paper aims to deal with the study of effect of cerium oxide (CeO2) modification on the sand slurry erosion resistance of Ni – tungsten carbide (WC) coatings.

Design/methodology/approach

Flame-sprayed conventional and CeO2-modified Ni–WC coatings were developed on a mild steel substrate. Slurry erosion tests were carried out in an in-house-designed and fabricated pot-type slurry erosion test rig to evaluate wear behavior of conventional and modified coatings. The erosive wear test was conducted using 5 per cent silica sand slurry at 850 rpm.

Findings

Modified coatings exhibited increased hardness as compared to the conventional coating. Slurry erosion resistance of most modified coatings was superior to that of the unmodified coating. Hardness of coating doped with 0.9 per cent CeO2 was highest among all coatings, and concomitantly this composition also showed the least wear. Scanning electron microscopy (SEM) revealed that microcutting was much less in the modified coating.

Originality/value

Slurry erosion wear of Ni–WC flame-sprayed coatings in sand slurry media is substantiated by extensive SEM study.

Keywords

Citation

Purkayastha, S. and Kumar Dwivedi, D. (2014), "Slurry erosion performance of CeO2-modified Ni–WC coatings", Industrial Lubrication and Tribology, Vol. 66 No. 4, pp. 533-537. https://doi.org/10.1108/ILT-03-2012-0034

Publisher

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Emerald Group Publishing Limited

Copyright © 2014, Emerald Group Publishing Limited

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