Process Parameter Impact on Suspension-HVOF-Sprayed Cr2O3 Coatings

Jarkko Kiilakoski; Richard Trache; Stefan Björklund; Shrikant Joshi; Petri Vuoristo

doi:10.1007/s11666-019-00940-7

Process Parameter Impact on Suspension-HVOF-Sprayed Cr₂O₃ Coatings

Jarkko Kiilakoski^*
, Richard Trache
, Stefan Björklund
, Shrikant Joshi
, Petri Vuoristo

^*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Artikkeli › Tieteellinen › vertaisarvioitu

22 Sitaatiot (Scopus)

34 Lataukset (Pure)

Abstrakti

Chromium oxide (Cr₂O₃) is commonly used as an atmospheric plasma-sprayed (APS) coating from powder feedstock in applications requiring resistance to sliding wear and corrosion, as well as amenability to texturing, e.g., in anilox rolls. Recently, high-velocity oxy-fuel spray methods involving suspension feedstock have been considered an extremely promising alternative to produce denser and more homogeneous chromium oxide coatings with lower as-sprayed surface roughness, higher hardness and potentially superior wear performance compared to conventional APS-sprayed coatings. In this study, the impact of process parameters namely auxiliary air cleaning nozzles and a transverse air curtain on suspension high-velocity oxy-fuel-sprayed Cr₂O₃ suspensions is presented. The produced coatings are characterized for their microstructure, mechanical properties and wear resistance by cavitation erosion. The results reveal the importance of optimized air nozzles and air curtain to achieve a vastly improved coating structure and performance.

Alkuperäiskieli	Englanti
Sivut	1933–1944
Sivumäärä	12
Julkaisu	Journal of Thermal Spray Technology
Vuosikerta	28
Numero	8
DOI - pysyväislinkit	https://doi.org/10.1007/s11666-019-00940-7
Tila	Julkaistu - 2019
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Rahoitus

The authors gratefully acknowledge the financial support from ‘the graduate school of the President of Tampere University of Technology’, the ‘K.F. and Maria Dunderberg Foundation’ and Business Finland (Finnish innovation funding, trade, investment and travel promotion organization), its ‘‘Ductile and Damage Tolerant Ceramic Coatings’’ project and the participating companies. The authors would like to thank Mr. Anssi Metsähonkala of Tampere University for manufacturing the coatings. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Julkaisufoorumi-taso

Jufo-taso 1

!!ASJC Scopus subject areas

Condensed Matter Physics
Surfaces, Coatings and Films
Materials Chemistry

Pääsy asiakirjaan

10.1007/s11666-019-00940-7Lisenssi: CC BY

Kiilakoski2019_Article_ProcessParameterImpactOnSuspenFinal published version, 4,02 MBLisenssi: CC BY

http://urn.fi/URN:NBN:fi:tuni-201912026472Lisenssi: CC BY

Tampereen Mikroskopiakeskus
Vippola, M. (Manager), Honkanen, M. (Operator) & Salminen, T. (Operator)
Tekniikan ja luonnontieteiden tiedekunta
Laitteistot/tilat: Tutkimusinfrastruktuuri

Siteeraa tätä

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AB - Chromium oxide (Cr2O3) is commonly used as an atmospheric plasma-sprayed (APS) coating from powder feedstock in applications requiring resistance to sliding wear and corrosion, as well as amenability to texturing, e.g., in anilox rolls. Recently, high-velocity oxy-fuel spray methods involving suspension feedstock have been considered an extremely promising alternative to produce denser and more homogeneous chromium oxide coatings with lower as-sprayed surface roughness, higher hardness and potentially superior wear performance compared to conventional APS-sprayed coatings. In this study, the impact of process parameters namely auxiliary air cleaning nozzles and a transverse air curtain on suspension high-velocity oxy-fuel-sprayed Cr2O3 suspensions is presented. The produced coatings are characterized for their microstructure, mechanical properties and wear resistance by cavitation erosion. The results reveal the importance of optimized air nozzles and air curtain to achieve a vastly improved coating structure and performance.

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