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Evaluating the toughness of APS and HVOF-sprayed Al2O3-ZrO2-coatings by in-situ- and macroscopic bending

Tutkimustuotosvertaisarvioitu

Standard

Evaluating the toughness of APS and HVOF-sprayed Al2O3-ZrO2-coatings by in-situ- and macroscopic bending. / Kiilakoski, J.; Musalek, R.; Lukac, F.; Koivuluoto, H.; Vuoristo, P.

julkaisussa: Journal of the European Ceramic Society, Vuosikerta 38, Nro 4, 2018, s. 1908-1918.

Tutkimustuotosvertaisarvioitu

Harvard

Kiilakoski, J, Musalek, R, Lukac, F, Koivuluoto, H & Vuoristo, P 2018, 'Evaluating the toughness of APS and HVOF-sprayed Al2O3-ZrO2-coatings by in-situ- and macroscopic bending', Journal of the European Ceramic Society, Vuosikerta. 38, Nro 4, Sivut 1908-1918. https://doi.org/10.1016/j.jeurceramsoc.2017.11.056

APA

Vancouver

Author

Kiilakoski, J. ; Musalek, R. ; Lukac, F. ; Koivuluoto, H. ; Vuoristo, P. / Evaluating the toughness of APS and HVOF-sprayed Al2O3-ZrO2-coatings by in-situ- and macroscopic bending. Julkaisussa: Journal of the European Ceramic Society. 2018 ; Vuosikerta 38, Nro 4. Sivut 1908-1918.

Bibtex - Lataa

@article{a0388827b5dc4606bdbd4667edf937af,
title = "Evaluating the toughness of APS and HVOF-sprayed Al2O3-ZrO2-coatings by in-situ- and macroscopic bending",
abstract = "Thermally-sprayed ceramic coatings are commonly used in applications where high wear and corrosion resistance are essential. However, their inherently low toughness and resistance to impacts often limit their use. In bulk ceramics, the toughening effect of ZrO2 has been successfully implemented in different compositions of Al2O3-ZrO2. Successful toughening leads to increased wear resistance and higher reliability. In this study, APS- and HVOF-sprayed Al2O3-40ZrO2 coatings were characterized with SEM and XRD techniques. The toughness of the coatings was evaluated by measuring their strain tolerance with in-situ (SEM) three-point-bending and macroscopic four-point bending with acoustic emission instrumentation. The APS-coatings had a higher strain-to-fracture but failed abruptly. In HVOF-coatings, the cracking commenced earlier but proceeded slower with more crack deflections. The observed behaviour is likely to derive from the coarser microstructure of the APS-coatings, which allows strain distribution in a larger area unlike the finer structure with a lesser melting degree of the HVOF-coatings.",
keywords = "AlO-ZrO, Fracture, Mechanical testing, Thermal spray, Toughening",
author = "J. Kiilakoski and R. Musalek and F. Lukac and H. Koivuluoto and P. Vuoristo",
year = "2018",
doi = "10.1016/j.jeurceramsoc.2017.11.056",
language = "English",
volume = "38",
pages = "1908--1918",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier",
number = "4",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Evaluating the toughness of APS and HVOF-sprayed Al2O3-ZrO2-coatings by in-situ- and macroscopic bending

AU - Kiilakoski, J.

AU - Musalek, R.

AU - Lukac, F.

AU - Koivuluoto, H.

AU - Vuoristo, P.

PY - 2018

Y1 - 2018

N2 - Thermally-sprayed ceramic coatings are commonly used in applications where high wear and corrosion resistance are essential. However, their inherently low toughness and resistance to impacts often limit their use. In bulk ceramics, the toughening effect of ZrO2 has been successfully implemented in different compositions of Al2O3-ZrO2. Successful toughening leads to increased wear resistance and higher reliability. In this study, APS- and HVOF-sprayed Al2O3-40ZrO2 coatings were characterized with SEM and XRD techniques. The toughness of the coatings was evaluated by measuring their strain tolerance with in-situ (SEM) three-point-bending and macroscopic four-point bending with acoustic emission instrumentation. The APS-coatings had a higher strain-to-fracture but failed abruptly. In HVOF-coatings, the cracking commenced earlier but proceeded slower with more crack deflections. The observed behaviour is likely to derive from the coarser microstructure of the APS-coatings, which allows strain distribution in a larger area unlike the finer structure with a lesser melting degree of the HVOF-coatings.

AB - Thermally-sprayed ceramic coatings are commonly used in applications where high wear and corrosion resistance are essential. However, their inherently low toughness and resistance to impacts often limit their use. In bulk ceramics, the toughening effect of ZrO2 has been successfully implemented in different compositions of Al2O3-ZrO2. Successful toughening leads to increased wear resistance and higher reliability. In this study, APS- and HVOF-sprayed Al2O3-40ZrO2 coatings were characterized with SEM and XRD techniques. The toughness of the coatings was evaluated by measuring their strain tolerance with in-situ (SEM) three-point-bending and macroscopic four-point bending with acoustic emission instrumentation. The APS-coatings had a higher strain-to-fracture but failed abruptly. In HVOF-coatings, the cracking commenced earlier but proceeded slower with more crack deflections. The observed behaviour is likely to derive from the coarser microstructure of the APS-coatings, which allows strain distribution in a larger area unlike the finer structure with a lesser melting degree of the HVOF-coatings.

KW - AlO-ZrO

KW - Fracture

KW - Mechanical testing

KW - Thermal spray

KW - Toughening

U2 - 10.1016/j.jeurceramsoc.2017.11.056

DO - 10.1016/j.jeurceramsoc.2017.11.056

M3 - Article

VL - 38

SP - 1908

EP - 1918

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 4

ER -