Original title: Local cohesion of splats in hybrid plasma spray coating as observed by in-situ experiment
Authors: Mušálek, Radek ; Tesař, Tomáš ; Minařík, Jakub ; Dudík, Jonáš
Document type: Papers
Conference/Event: 16th International Conference on Local Mechanical Properties, Praha (CZ), 20240529
Year: 2024
Language: eng
Abstract: Hybrid plasma spraying combines spraying of dry coarse powders and liquids (suspensions and/or solutions). Introduction of secondary miniature phase from the liquid may provide new coating functionality but also may have a significant influence on the local coating cohesion – increasing or decreasing it, depending on the materials combination and deposition conditions. In this study, cohesion of dissimilar splats within the early-stage experimental hybrid thermal barrier coating (TBC) was evaluated by in-situ SEM three-point bending (3PB) observation coupled with high-resolution strain mapping. Loading was carried out on the annealed sample simulating in-service thermal exposure. Observed coating failure confirmed that the coating exhibits a rather high intersplat cohesion lowering its strain-tolerance, which was presumably the reason for the relatively low thermal cycling resistance of the deposit.
Keywords: cohesion; hybrid coating; in-situ SEM; Plasma spraying; strain mapping
Project no.: GA22-21478S (CEP)
Funding provider: GA ČR
Host item entry: Acta Polytechnica CTU Proceedings, ISBN 978-80-01-07386-5, ISSN 2336-5382
Note: Související webová stránka: https://ojs.cvut.cz/ojs/index.php/APP/article/view/10364/7306

Institution: Institute of Plasma Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: https://hdl.handle.net/11104/0368688

Permalink: http://www.nusl.cz/ntk/nusl-687949


The record appears in these collections:
Research > Institutes ASCR > Institute of Plasma Physics
Conference materials > Papers