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Influence of spray distance on mechanical and tribological properties of HVOF sprayed WC-Co-Cr coatings Cover

Influence of spray distance on mechanical and tribological properties of HVOF sprayed WC-Co-Cr coatings

Materials Science-Poland
Volume 39 (2021): Issue 4 (December 2021)
By: Monika Górnik,  Ewa Jonda,  Leszek Łatka,  Monika Nowakowska and  Marcin Godzierz  
Open Access
|Apr 2022

Figures & Tables

Fig. 1

Morphology of initial feedstock power (SEM-SE) with random measurements of particle size. SEM, scanning electron microscope

Fig. 2

Schematic representation of the HVOF method and its key process parameter, inspired by Pawłowski [3] and Jonda and Łatka [33]. HVOF, high-velocity oxy-fuel spraying

Fig. 3

The topography of the A1 sample surface

Fig. 4

SEM images of coatings’ cross sections: (A, B) sample A1; (C, D) sample A2; (E, F) sample A3; (A, C, E) – mag. 2,000×; (B, D, F) – mag. 5,000×. SEM, scanning electron microscope

Fig. 5

XRD patterns of all WC-Co-Cr coatings manufactured by the HVOF method. XRD, X-ray diffraction; HVOF, high-velocity oxy-fuel spraying

Fig. 6

SEM images showing the wear track of deposited coatings: (A) A1, (B) A2, (C) A3. SEM, scanning electron microscope

Sliding wear results: wear factor and friction coefficient (CoF)

A1A2A3
K, 10−9 mm3/(N · m)77 ± 1173 ± 981 ± 14
CoF, -0.41 ± 0.070.40 ± 0.090.40 ± 0.07

Mean values of bond strength and type of fracture

A1A2A3
Bond strength, MPa65 ± 361 ± 455 ± 3
Fracture typeA/CA/CA/C

Values of spray distance and sample code

Sample codeA1A2A3
Spray distance, mm240280320

Values of elastic modulus and hardness from instrumental indentation test

A1A2A3
HIT, GPa14.82 ± 1.2514.67 ± 1.5514.24 ± 1.35
EIT, GPa339342336
DOI: https://doi.org/10.2478/msp-2021-0047 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 545 - 554
Submitted on: Feb 2, 2022
|
Accepted on: Mar 1, 2022
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Published on: Apr 21, 2022
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
high-velocity oxy-fuel spraying,
cermet coatings,
mechanical properties,
phase analysis,
wear resistance
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2022 Monika Górnik, Ewa Jonda, Leszek Łatka, Monika Nowakowska, Marcin Godzierz, 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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