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Erosion performance of suspension plasma spray thermal barrier coatings: A comparison with state of art coatings
Thermal Spray Innovations, Salzburg, (AUT).ORCID iD: 0000-0003-0209-1332
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0003-2475-9284
Department of Mechanical Engineering, SASTRA University, (IND).
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0001-5521-6894
2022 (English)In: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 437, article id 128311Article in journal (Refereed) Published
Abstract [en]

Suspension plasma spray (SPS) thermal barrier coatings are currently at an early stage of industrial adoption. There remain questions about the performance of SPS columnar coatings under different engine environmental conditions as it may influence which established engine coatings can be replaced by SPS coatings. One particular area of concern has been the erosion resistance of SPS coatings.In this study a columnar SPS coating has been evaluated against three types of state of art air plasma spray coatings: conventional porous coating, high porosity coating and dense vertically cracked coating. Air-jet erosion testing was performed on coatings at a glancing angle of 30 degrees and with direct impact at 90 degrees. Coatings have been ranked according to their mass loss per unit erodent mass. Coatings were also evaluated for their microstructure, porosity content, hardness, and fracture toughness. The erosion damage created during testing has also been investigated using electron microscopy to observe the damage mechanism. The results of this study demonstrate that SPS coatings can outperform porous APS coatings in erosion resistance and could be considered a match for dense vertically cracked coatings. The SPS columnar coatings have shown a decreasing erosion rate with exposure time that suggest the influence of surface roughness on initial erosion behaviour.

Place, publisher, year, edition, pages
Elsevier, 2022. Vol. 437, article id 128311
Keywords [en]
Thermal barrier coating; Air plasma spray; Suspension plasma spray; Erosion; Porosity; YSZ
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-18377DOI: 10.1016/j.surfcoat.2022.128311ISI: 000779412500004Scopus ID: 2-s2.0-85126093827OAI: oai:DiVA.org:hv-18377DiVA, id: diva2:1698701
Available from: 2022-09-26 Created: 2022-09-26 Last updated: 2022-09-26Bibliographically approved

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Curry, NicholasMahade, SatyapalJoshi, Shrikant V.

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