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Process Parameter Impact on Suspension-HVOF-Sprayed Cr2O3 Coatings
Tampere University, Materials Science and Environmental Engineering, Tampere Finland.ORCID iD: 0000-0003-1023-5519
Treibacher Industrie AG, Althofen, Austria.
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing.
University West, Department of Engineering Science, Research Enviroment Production Technology West.ORCID iD: 0000-0001-5521-6894
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2019 (English)In: Journal of thermal spray technology (Print), ISSN 1059-9630, E-ISSN 1544-1016, Vol. 28, no 8, p. 1933-1944Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Springer, 2019. Vol. 28, no 8, p. 1933-1944
Keywords [en]
Cr2O3, influence of spray parameters, mechanical properties, SHVOF, suspension spraying
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-14703DOI: 10.1007/s11666-019-00940-7Scopus ID: 2-s2.0-85074710199OAI: oai:DiVA.org:hv-14703DiVA, id: diva2:1370475
Note

Funders: K.F. and Maria Dunderberg Foundation’ and Business Finland (Finnish innovation funding, trade, investment and travel promotion organization

Available from: 2019-11-15 Created: 2019-11-15 Last updated: 2020-01-10Bibliographically approved

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Björklund, StefanJoshi, Shrikant V.

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Division of Subtractive and Additive ManufacturingResearch Enviroment Production Technology West
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Journal of thermal spray technology (Print)
Manufacturing, Surface and Joining Technology

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