Microhardness as a simple means of estimating relative wear resistance of carbide thermal spray coatings: Part 1. Characterization of cemented carbide coatings

Michael Factor*, Itzhak Roman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A selection of WC-Co and Cr3C2-25%NiCr coatings deposited by plasma spraying and high velocity oxygen fuel (HVOF) were tested. The microstructures of the coatings were characterized, and their mechanical properties were assessed using Knoop microindentation procedures. The coatings were also subjected to various wear tests. All of the coatings were at least 200 μm thick and were deposited onto stainless steel substrates. The wear tests simulated abrasion, cavitation wear, sliding wear, and particle erosion wear. In this first part of a two-part contribution, the microstructures of the coatings are characterized and a discussion on the evaluation of mechanical properties from the microindentation response is presented. The nature of microhardness testing as applied to thermal spray coatings is evaluated as a means of assessing resistance to plastic flow, elasticity, and brittleness. In Part 2, the results of the various wear simulations are reported, and the utility of microhardness as an indicator of wear resistance is examined.

Original languageEnglish
Pages (from-to)468-481
Number of pages14
JournalJournal of Thermal Spray Technology
Volume11
Issue number4
DOIs
StatePublished - Dec 2002

Keywords

  • Carbides
  • CrC-NiCr
  • Knoop
  • Microhardness
  • Vickers
  • WC -Co

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