Preparing nano-structural WC-Co coatings by utilizing novel powder manufacturing route

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

Thermal sprayed cemented carbides such as WC-Co(Cr) and Cr3C2-NiCr coatings are well known and widely used for wear protection purposes. Submicron, nano-sized and multimodal carbides in cermets have shown promising results in retaining hardness and wear performance. In this study novel manufacturing route to produce nanostructural WC-Co powders and thermal sprayed coatings were utilized. This presented powder manufacturing method is based on use of water soluble raw materials as a starting media for synthesis to create in a single process a particle in where nano size carbides (50 nm) tightly bonded on metal matrix. Powders were manufactured via spray drying and heat treatment method from water based solution with raw materials ammonium meta tungstate (AMT) as a tungsten source, glycine as a carbon source and cobalt acetate as a cobalt source. Powder was heat treated in Ar atmosphere. Experimental powders were sprayed by HVAF-spraying. Morphology, microstructure and properties were analysed from the produced powders and HVAF-coatings.
Original languageEnglish
Title of host publicationThermal Spray: Fostering a sustainable world for a better life!
Publication statusPublished - 2016
MoE publication typeB3 Non-refereed article in conference proceedings
EventInternational Thermal Spray Conference, ITSC 2016 - Shanghai, China
Duration: 10 May 201612 May 2016

Conference

ConferenceInternational Thermal Spray Conference, ITSC 2016
Abbreviated titleITSC 2016
CountryChina
CityShanghai
Period10/05/1612/05/16

Keywords

  • thermal spray
  • nono-sized cemented carbides
  • water soluble raw materials
  • powders

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