Comparison of wear performance of thermal sprayed cermet (WC-Co) coatings from suspension and feedstock powders

Omar Ali, Rehan Ahmed, H. Alawadhi, M. Shameer, N. H. Faisal, Nayef M. Al-Anazi, M. F. A. Goosen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

WC-Co coatings were deposited using conventional High Velocity Oxy-Fuel Jet-Kote (HVOF-JK) and Suspension HVOF (S-HVOF) methods. Microstructural and mechanical properties along with the wear resistance of coatings were investigated. Reciprocating sliding wear tests were conducted against sintered Si3N4 counter-body with a normal load of 25N and total sliding distance of 500m following ASTM G133-2 standard. Coatings were characterised by Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD) and nano-lndentation techniques. HVOF-JK coating showed good retention of WC whereas S-HVOF coating showed the presence of W, W2C and amorphous/nanocrystalline phases. Nano-indentation of HVOF-JK and S-HVOF showed that the relative hardness of the HVOF-JK coating was higher but their elastic modulus was lower. The lower total wear rate was exhibited by the HVOF-JK coating. This difference in wear performance is attributed to the difference in hardness of the coatings and decarburisation of WC particles.

Original languageEnglish
Title of host publicationInternational Thermal Spray Conference and Exposition (ITSC 2017)
PublisherASM International
Pages681-686
Number of pages6
Volume2
ISBN (Electronic)9781510858220
Publication statusPublished - 7 Jun 2017

Keywords

  • Nanocomposite
  • Sliding wear
  • Suspension spray
  • Tribology

ASJC Scopus subject areas

  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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    Ali, O., Ahmed, R., Alawadhi, H., Shameer, M., Faisal, N. H., Al-Anazi, N. M., & Goosen, M. F. A. (2017). Comparison of wear performance of thermal sprayed cermet (WC-Co) coatings from suspension and feedstock powders. In International Thermal Spray Conference and Exposition (ITSC 2017) (Vol. 2, pp. 681-686). ASM International.