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Experimental visualization of microstructure evolution during suspension plasma spraying of thermal barrier coatings
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för avverkande och additativa tillverkningsprocesser (AAT). (PTW)ORCID-id: 0000-0003-1897-0171
Innovnano Materials, Coimbra, Portugal.
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för avverkande och additativa tillverkningsprocesser (AAT). (PTW)ORCID-id: 0000-0002-9578-4076
Treibacher Industries AG, Althofen, Austria.
Vise andre og tillknytning
2019 (engelsk)Inngår i: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 39, nr 2-3, s. 470-481Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper investigates the evolution of microstructure of thermal barrier coatings (TBCs) produced by suspension plasma spraying (SPS) through a careful experimental study. Understanding the influence of different suspension characteristics such as type of solvent, solid load content and median particle size on the ensuing TBC microstructure, as well as visualizing the early stages of coating build-up leading to formation of a columnar microstructure or otherwise, was of specific interest. Several SPS TBCs with different suspensions were deposited under identical conditions (same substrate, bond coat and plasma spray parameters). The experimental study clearly revealed the important role of suspension characteristics, namely surface tension, density and viscosity, on the final microstructure, with study of its progressive evolution providing invaluable insights. Variations in suspension properties manifest in the form of differences in droplet momentum and trajectory, which are found to be key determinants governing the resulting microstructure (e.g., lamellar/vertically cracked or columnar).

sted, utgiver, år, opplag, sider
2019. Vol. 39, nr 2-3, s. 470-481
Emneord [en]
Suspension plasma spraying, Thermal barrier coatings, Droplet momentum, Columnar microstructure, Microstructure evolution
HSV kategori
Forskningsprogram
TEKNIK, Produktions- och materialteknik; Produktionsteknik
Identifikatorer
URN: urn:nbn:se:hv:diva-12948DOI: 10.1016/j.jeurceramsoc.2018.09.023ISI: 000450379400042Scopus ID: 2-s2.0-85053889817OAI: oai:DiVA.org:hv-12948DiVA, id: diva2:1259062
Forskningsfinansiär
Region Västra Götaland, RUN 612-0974-13Tilgjengelig fra: 2018-10-26 Laget: 2018-10-26 Sist oppdatert: 2018-12-20bibliografisk kontrollert

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