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Comparative analysis of microstructure and selected properties of WC-Co-Cr coatings sprayed by high-velocity oxy fuel on S235 and AZ31 substrates Cover

Comparative analysis of microstructure and selected properties of WC-Co-Cr coatings sprayed by high-velocity oxy fuel on S235 and AZ31 substrates

Materials Science-Poland
Volume 42 (2024): Issue 1 (March 2024)
By: Ewa Jonda,  Hanna Myalska-Głowacka,  Leszek Łatka,  Krzysztof Szymański and  Magłorzata Dziekońska  
Open Access
|May 2024

Figures & Tables

Fig. 1.

Morphology of the initial feedstock powder: (a) standard view, (b) detailed view
Morphology of the initial feedstock powder: (a) standard view, (b) detailed view

Fig. 2.

Scheme of the HVOF deposition method
Scheme of the HVOF deposition method

Fig. 3.

The surface topography of sprayed coatings: (a) MBS, (b) SBS
The surface topography of sprayed coatings: (a) MBS, (b) SBS

Fig. 4.

The SEM images of the coatings’ cross-sections at low magnification (500x): (a) MBS and (b) SBS
The SEM images of the coatings’ cross-sections at low magnification (500x): (a) MBS and (b) SBS

Fig. 5.

The SEM images of the coatings’ cross-sections at high magnification (10,000x): (a) MBS and (b) SBS
The SEM images of the coatings’ cross-sections at high magnification (10,000x): (a) MBS and (b) SBS

Fig. 6.

XRD patterns for HVOF-sprayed coatings
XRD patterns for HVOF-sprayed coatings

Fig. 7.

Results of crystallite size calculations for WC and W2C phases in the sprayed coatings
Results of crystallite size calculations for WC and W2C phases in the sprayed coatings

HVOF process parameters and sample code

SampleMedium feed rateSpray distance mm
Kerosene l/minOxygen l/minNitrogen l/minPowder g/min
SBS10.3809501270300
MBS20.435900 360

Results for surface roughness of the as-sprayed coatings

SampleRaRpRvRz
SBS3.36 ± 0.2310.20 ± 2.147.95 ± 1.4818.10 ± 3.15
MBS4.28 ± 0.2411.84 ± 2.479.92 ± 1.8321.77 ± 3.51

Results for CRI calculations

SampleCRI value
SBS0.915
MBS0.928

The IIT results for carbide particles and metallic matrix in sprayed coatings

SampleHIT (WC) GPaEIT (WC) GPaHIT (Co-Cr) GPaEIT (Co-Cr) GPa
SBS29.14 ± 1.91622 ± 176.52 ± 0.47192 ± 9
MBS28.65 ± 1.94624 ± 186.46 ± 0.42193 ± 8
DOI: https://doi.org/10.2478/msp-2024-0002 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 32 - 41
Submitted on: Feb 13, 2024
Accepted on: Mar 17, 2024
Published on: May 8, 2024
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
structural steel,
magnesium alloy,
cermet coatings,
HVOF,
mechanical properties,
microstructure,
phase analysis
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2024 Ewa Jonda, Hanna Myalska-Głowacka, Leszek Łatka, Krzysztof Szymański, Magłorzata Dziekońska, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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