Microstructure and wear behavior of plasma-sprayed nanostructured WC-Co coatings

Giovanni Di Girolamo, Francesco Marra, L. Pilloni, Giovanni Pulci, Jacopo Tirillò, Teodoro Valente

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Abstract

Atmospheric plasma spraying of WC-Co particles with standard gas mixtures (Ar-H2) typically results in largely decarburized coatings with relatively low wear resistance. To fabricate cermet coatings with enhanced tribological properties, nanostructured WC-Co coatings were plasma sprayed using two different process gas mixtures. Phase composition and microstructure were investigated by X-ray diffraction and scanning electron microscopy, respectively. Microhardness increased by increasing the amount of retained WC grains in coating microstructure. Friction and wear properties, measured under dry sliding conditions, strongly depended on the degree of decarburization. They were comparable to those of conventional coatings produced using identical conditions. © 2012 The American Ceramic Society.
Original languageEnglish
Pages (from-to)60 - 71
Number of pages12
JournalInternational Journal of Applied Ceramic Technology
Volume10
Issue number1
DOIs
Publication statusPublished - Jan 2013
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Marketing
  • Materials Chemistry
  • Condensed Matter Physics

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