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Effect of suspension characteristics on the performance of thermal barrier coatings deposited by suspension plasma spray
Research and Technology, GKN Aerospace Sweden AB, Trollhättan, 46186, Sweden. (PTW)ORCID iD: 0000-0003-1897-0171
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-4201-668x
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-9578-4076
2020 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 47, no 1, p. 272-283Article in journal (Refereed) Published
Abstract [en]

This paper investigates the influence of suspension characteristics on microstructure and performance of suspensions plasma sprayed (SPS) thermal barrier coatings (TBCs). Five suspensions were produced using various suspension characteristics, namely, type of solvent and solid load content, and the resultant suspensions were utilized to deposit five different TBCs under identical processing conditions. The produced TBCs were evaluated for their performance i.e. thermal conductivity, thermal cyclic fatigue (TCF) and thermal shock (TS) lifetime. This experimental study revealed that the differences in the microstructure of SPS TBCs produced using varied suspensions resulted in a wide-ranging overall TBC performance. All TBCs exhibited thermal conductivity lower than 1 W/(m. K) except water-ethanol mixed suspension produced TBC. The TS lifetime was also affected to a large extent where 10 wt % solid loaded ethanol and 25 wt % solid loaded water suspensions produced TBCs exhibited the highest and the lowest lifetime, respectively. On the contrary, TCF lifetime was not as significantly affected as thermal conductivity and TS lifetime, and all ethanol suspensions showed marginally better TCF lifetime than water and ethanol-water mixed suspensions deposited TBCs. © 2020

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 47, no 1, p. 272-283
Keywords [en]
Ethanol; Microstructure; Plasma jets; Plasma spraying; Sprayed coatings; Suspensions (fluids); Thermal conductivity; Thermal fatigue, Ethanol-water; Mixed suspensions; Plasma sprayed; Processing condition; Suspension plasma sprays; Thermal barrier coating (TBCs); Thermal cyclic fatigue; Water suspensions, Thermal barrier coatings
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-15773DOI: 10.1016/j.ceramint.2020.08.131ISI: 000589661400004Scopus ID: 2-s2.0-85089570648OAI: oai:DiVA.org:hv-15773DiVA, id: diva2:1464160
Funder
Region Västra Götaland, RUN 612-0974-13Available from: 2020-09-04 Created: 2020-09-04 Last updated: 2021-02-09Bibliographically approved

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Ganvir, AshishGupta, Mohit KumarKumar, NitishMarkocsan, Nicolaie

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