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A Study of Cr3C2-Based HVOF- and HVAF-Sprayed Coatings: Microstructure and Carbide Retention

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A Study of Cr3C2-Based HVOF- and HVAF-Sprayed Coatings : Microstructure and Carbide Retention. / Matikainen, V.; Bolelli, G.; Koivuluoto, H.; Honkanen, M.; Vippola, M.; Lusvarghi, L.; Vuoristo, P.

julkaisussa: Journal of Thermal Spray Technology, Vuosikerta 26, Nro 6, 08.2017, s. 1-18.

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Matikainen, V. ; Bolelli, G. ; Koivuluoto, H. ; Honkanen, M. ; Vippola, M. ; Lusvarghi, L. ; Vuoristo, P. / A Study of Cr3C2-Based HVOF- and HVAF-Sprayed Coatings : Microstructure and Carbide Retention. Julkaisussa: Journal of Thermal Spray Technology. 2017 ; Vuosikerta 26, Nro 6. Sivut 1-18.

Bibtex - Lataa

@article{21035d5a130b4db69705a52576efe970,
title = "A Study of Cr3C2-Based HVOF- and HVAF-Sprayed Coatings: Microstructure and Carbide Retention",
abstract = "The research on high-velocity air-fuel (HVAF)-sprayed Cr3C2-based materials has mostly focused on conventional Cr3C2-25NiCr composition. In this paper, two alternative compositions (Cr3C2-50NiCrMoNb and Cr3C2-37WC-18NiCoCrFe) were sprayed with high-velocity oxy-fuel (HVOF) and HVAF spray processes to evaluate the material behavior during spraying and to provide characterization of the microstructures and mechanical properties of the coatings. For comparison, coatings from the Cr3C2-25NiCr composition were sprayed with both processes. Spray diagnostics were carried out to obtain average particle velocity and temperature for each material and process combinations. The measured average in-flight particle data were 1800 °C and 700 m/s for HVOF process, and 1450 °C and 900 m/s for HVAF process. Characterization of the coating microstructures was carried out by scanning electron microscopy and X-ray diffraction. In addition, the carbon content of the feedstock powders and sprayed coatings was measured with carbon analyzer. The results show that carbide rebounding or selective deposition of particles with higher metal matrix content is the dominating reason for carbide loss during HVAF spraying, while carbide dissolution is an additional source for the HVOF spraying. Higher particle velocities and controlled temperature measured for the HVAF process produced dense coatings with improved toughness and more homogenous coating structure.",
keywords = "chromium carbide, diagnostics, HVAF, HVOF, image analysis",
author = "V. Matikainen and G. Bolelli and H. Koivuluoto and M. Honkanen and M. Vippola and L. Lusvarghi and P. Vuoristo",
year = "2017",
month = "8",
doi = "10.1007/s11666-017-0578-x",
language = "English",
volume = "26",
pages = "1--18",
journal = "Journal of Thermal Spray Technology",
issn = "1059-9630",
publisher = "ASM International",
number = "6",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - A Study of Cr3C2-Based HVOF- and HVAF-Sprayed Coatings

T2 - Microstructure and Carbide Retention

AU - Matikainen, V.

AU - Bolelli, G.

AU - Koivuluoto, H.

AU - Honkanen, M.

AU - Vippola, M.

AU - Lusvarghi, L.

AU - Vuoristo, P.

PY - 2017/8

Y1 - 2017/8

N2 - The research on high-velocity air-fuel (HVAF)-sprayed Cr3C2-based materials has mostly focused on conventional Cr3C2-25NiCr composition. In this paper, two alternative compositions (Cr3C2-50NiCrMoNb and Cr3C2-37WC-18NiCoCrFe) were sprayed with high-velocity oxy-fuel (HVOF) and HVAF spray processes to evaluate the material behavior during spraying and to provide characterization of the microstructures and mechanical properties of the coatings. For comparison, coatings from the Cr3C2-25NiCr composition were sprayed with both processes. Spray diagnostics were carried out to obtain average particle velocity and temperature for each material and process combinations. The measured average in-flight particle data were 1800 °C and 700 m/s for HVOF process, and 1450 °C and 900 m/s for HVAF process. Characterization of the coating microstructures was carried out by scanning electron microscopy and X-ray diffraction. In addition, the carbon content of the feedstock powders and sprayed coatings was measured with carbon analyzer. The results show that carbide rebounding or selective deposition of particles with higher metal matrix content is the dominating reason for carbide loss during HVAF spraying, while carbide dissolution is an additional source for the HVOF spraying. Higher particle velocities and controlled temperature measured for the HVAF process produced dense coatings with improved toughness and more homogenous coating structure.

AB - The research on high-velocity air-fuel (HVAF)-sprayed Cr3C2-based materials has mostly focused on conventional Cr3C2-25NiCr composition. In this paper, two alternative compositions (Cr3C2-50NiCrMoNb and Cr3C2-37WC-18NiCoCrFe) were sprayed with high-velocity oxy-fuel (HVOF) and HVAF spray processes to evaluate the material behavior during spraying and to provide characterization of the microstructures and mechanical properties of the coatings. For comparison, coatings from the Cr3C2-25NiCr composition were sprayed with both processes. Spray diagnostics were carried out to obtain average particle velocity and temperature for each material and process combinations. The measured average in-flight particle data were 1800 °C and 700 m/s for HVOF process, and 1450 °C and 900 m/s for HVAF process. Characterization of the coating microstructures was carried out by scanning electron microscopy and X-ray diffraction. In addition, the carbon content of the feedstock powders and sprayed coatings was measured with carbon analyzer. The results show that carbide rebounding or selective deposition of particles with higher metal matrix content is the dominating reason for carbide loss during HVAF spraying, while carbide dissolution is an additional source for the HVOF spraying. Higher particle velocities and controlled temperature measured for the HVAF process produced dense coatings with improved toughness and more homogenous coating structure.

KW - chromium carbide

KW - diagnostics

KW - HVAF

KW - HVOF

KW - image analysis

U2 - 10.1007/s11666-017-0578-x

DO - 10.1007/s11666-017-0578-x

M3 - Article

VL - 26

SP - 1

EP - 18

JO - Journal of Thermal Spray Technology

JF - Journal of Thermal Spray Technology

SN - 1059-9630

IS - 6

ER -