Skip to main content
SpringerLink
Log in

Thermophysical and Microstructural Studies on Thermally Sprayed Tungsten Carbide-Cobalt Coatings

  • Peer Reviewed
  • Published:
Journal of Thermal Spray Technology Aims and scope Submit manuscript

Abstract

The development of new hardmetal coating applications such as fatigue-loaded parts, structural components, and tools for metal forming is connected with improvement of their performance and reliability. For modelling purposes, the knowledge of thermophysical, mechanical, and other material data is required. However, this information is still missing today. In this study, the thermophysical data of a WC-17Co coating sprayed with a liquid-fuelled HVOF-process from a commercial agglomerated and sintered feedstock powder from room temperature up to 700 °C was determined as an example. The dependence of the heat conductivity on temperature was obtained through measurement of the coefficient of thermal expansion, the specific heat capacity, and the thermal diffusivity. Heat conductivities ranging from 29.2 W/(mK) at 50 °C to 35.4 W/(mK) at 700 °C were determined. All measurements were performed twice (as-sprayed and after the first thermal cycle) to take into account the structural and compositional changes. Extensive XRD and FESEM studies were performed to characterize the phase compositions and microstructures in the as-sprayed and heat-treated states. Bulk samples obtained by spark plasma sintering from the feedstock powder were studied for comparison.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15

Similar content being viewed by others

References

  1. R. Ahmed and M. Hadfield, Mechanisms of Fatigue Failure in Thermal Spray Coatings, J. Thermal Spray Technol, 2002, 11(3), p 333-349

    Article  CAS  Google Scholar 

  2. L.-M. Berger, J. Spatzier, J. Bretschneider, K. Lipp, and S. Thiele, Rolling Contact Fatigue of HVOF-Sprayed Hardmetal Coatings on Unhardened Substrates, Thermal Spray Bull., 2009, 2(2), p 133-140

    Google Scholar 

  3. L.-M. Berger, M. Woydt, S. Saaro, Reib-/Gleitverschleiß von thermisch gespritzten Hartmetallschichten (Sliding Wear of Thermally Sprayed Hardmetal Coatings), Jahrbuch Oberflächentechnik, R. Suchentrunk, Ed., Eugen G. Leuze Verlag, Bad Saulgau, 2007, p 242-267 (in German)

  4. L.-M. Berger, Hardmetals as Thermal Spray Coatings, Powder Met., 2007, 50(3), p 205-214

    Article  CAS  Google Scholar 

  5. M.E. Vinayo, F. Kassabji, J. Guyonnet, and P. Fauchais, Plasma Sprayed WC-Co Coatings: Influence of Spray Conditions (Atmospheric and Low Pressure Plasma Spraying) on the Crystal Structure, Porosity, and Hardness, J. Vac. Sci. Technol., 1985, 3A(6), p 2483-2489

    Google Scholar 

  6. J.M. Guilemany, J.M. de Paco, J. Nutting, and J.R. Miguel, Characterization of the W2C Phase Formed during the High Velocity Oxygen Fuel Spraying of a WC + 12%Co Powder, Metal. Mater. Trans., 1999, 30A(8), p 1913-1921

    Article  CAS  Google Scholar 

  7. C.-J. Li, A. Ohmori, and Y. Harada, Effect of Powder Structure on the Structure of Thermally Sprayed WC-Co Coatings, J. Mater. Sci., 1996, 31(3), p 785-794

    Article  CAS  Google Scholar 

  8. C.-J. Li, A. Ohmori, and Y. Harada, Formation of an Amorphous Phase in Thermally Sprayed WC-Co, J. Thermal Spray Technol., 1996, 5(1), p 69-73

    Article  CAS  Google Scholar 

  9. C. Verdon, A. Karimi, and J.-L. Martin, A Study of High Velocity Oxy-Fuel Thermally Sprayed Tungsten Carbide Based Coatings. Part 1: Microstructures, Mater. Sci. Eng., 1998, A246(1-2), p 11-24

    CAS  Google Scholar 

  10. R. Schwetzke and H. Kreye, Microstructure and Properties of Tungsten Carbide Coatings Sprayed with Various High-Velocity Oxygen Fuel Spray Systems, J. Thermal Spray Technol., 1999, 8(3), p 433-439

    Article  CAS  Google Scholar 

  11. D.A. Stewart, P.H. Shipway, and D.G. McCartney, Influence of Heat Treatment on the Abrasive Wear Behaviour of HVOF Sprayed WC-Co Coatings, Surf. Coat. Technol., 1998, 105(1-2), p 13-24

    Article  CAS  Google Scholar 

  12. D.A. Stewart, P.H. Shipway, and D.G. McCartney, Microstructural Evolution in Thermally Sprayed WC-Co Coatings: Comparison between Nanocomposite and Conventional Starting Powders, Acta Mater., 2000, 48(7), p 1593-1604

    Article  CAS  Google Scholar 

  13. P. Vuoristo, K. Niemi, T. Mäntylä, L.-M. Berger, and M. Nebelung, Comparison of Different Hardmetal-Like Coatings Sprayed by Plasma and Detonation Gun Processes, Advances in Thermal Spray Science and Technology, C.C. Berndt and S. Sampath, Ed., ASM International, Houston, TX, 1995, p 309-315

    Google Scholar 

  14. J. Nerz, B. Kushner, and A. Rotolico, Microstructural Evaluation of Tungsten Carbide-Cobalt Coatings, J. Thermal Spray Technol., 1992, 1(2), p 147-152

    Article  CAS  Google Scholar 

  15. S. Zimmermann, H. Keller, and G. Schwier, New Carbide Based Materials for HVOF Spraying, Thermal Spray 2003: Advancing the Science and Applying the Technology, C. Moreau and B. Marple, Ed., ASM International, Orlando, FL, 2003, p 227-232

    Google Scholar 

  16. L.-M. Berger, P. Vuoristo, T.Mäntylä, and W.Gruner, A Study of Oxidation Behaviour of WC-Co, Cr3C2-NiCr and TiC-Ni-based Materials in Thermal Spray Processes, Thermal Spray: Meeting the Challenge of the 21st Century, C. Coddet, Ed., May 25-29, 1998 (Nice, France), ASM International, 1998, p 75-82

  17. L.-M. Berger, R. Zieris, and S. Saaro, Oxidation of HVOF-Sprayed Hardmetal Coatings, Proc. Int. Thermal Spray Conference & Exhibition, May 2-4, 2005 (Basel, Switzerland), DVS-Verlag, Düsseldorf, 2005, 8 p (CD)

  18. H. Kolaska and W. Weith, Hartmetalle als Werkstoffe für Konstruktionsbauteile (Hardmetals as Materials for Construction Parts), Metall, 1995, 49(2), p 104-111 (in German)

    CAS  Google Scholar 

Download references

Acknowledgments

This study was supported by the FhG Internal Programs under Grant No. WISA 816 442. The authors wish to thank Dr. Mathias Herrmann, IKTS Dresden, for performing the XRD Rietveld analysis.

Author information

Authors and Affiliations

  1. Fraunhofer Institute IKTS, Dresden, Germany

    Sven Thiele, Kerstin Sempf & Klaus Jaenicke-Roessler

  2. Fraunhofer Institute IWS, Dresden, Germany

    Lutz-Michael Berger & Jörg Spatzier

Authors
  1. Sven Thiele
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Kerstin Sempf
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Klaus Jaenicke-Roessler
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Lutz-Michael Berger
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Jörg Spatzier
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Sven Thiele.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Thiele, S., Sempf, K., Jaenicke-Roessler, K. et al. Thermophysical and Microstructural Studies on Thermally Sprayed Tungsten Carbide-Cobalt Coatings. J Therm Spray Tech 20, 358–365 (2011). https://doi.org/10.1007/s11666-010-9558-0

Download citation

  • Received:

  • Revised:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11666-010-9558-0

Keywords

Search

Navigation