Local cohesion of splats in hybrid plasma spray coating as observed by in-situ experiment
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 decreasi...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Czech Technical University in Prague
2024-12-01
|
| Series: | Acta Polytechnica CTU Proceedings |
| Subjects: | |
| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/10364 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849251045126963200 |
|---|---|
| author | Radek Mušálek Tomáš Tesař Jakub Minařík Jonáš Dudík |
| author_facet | Radek Mušálek Tomáš Tesař Jakub Minařík Jonáš Dudík |
| author_sort | Radek Mušálek |
| collection | DOAJ |
| description |
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.
|
| format | Article |
| id | doaj-art-7ba2d84668924c14bd23528294b3b1ea |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-7ba2d84668924c14bd23528294b3b1ea2025-08-20T03:57:04ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822024-12-015010.14311/APP.2024.50.0062Local cohesion of splats in hybrid plasma spray coating as observed by in-situ experimentRadek Mušálek0Tomáš Tesař1Jakub Minařík2Jonáš Dudík3Czech Academy of Sciences, Institute of Plasma Physics, U Slovanky 2525/1a, 182 00 Prague, Czech RepublicCzech Academy of Sciences, Institute of Plasma Physics, U Slovanky 2525/1a, 182 00 Prague, Czech RepublicCzech Academy of Sciences, Institute of Plasma Physics, U Slovanky 2525/1a, 182 00 Prague, Czech Republic; Czech Technical University in Prague, Faculty of Mechanical Engineering, Karlovo námestí 13, 121 35 Prague, Czech RepublicCzech Academy of Sciences, Institute of Plasma Physics, U Slovanky 2525/1a, 182 00 Prague, Czech Republic; Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Trojanova 13, 120 00 Prague, Czech Republic 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. https://ojs.cvut.cz/ojs/index.php/APP/article/view/10364plasma sprayinghybrid coatingin-situ SEMstrain mappingcohesion |
| spellingShingle | Radek Mušálek Tomáš Tesař Jakub Minařík Jonáš Dudík Local cohesion of splats in hybrid plasma spray coating as observed by in-situ experiment Acta Polytechnica CTU Proceedings plasma spraying hybrid coating in-situ SEM strain mapping cohesion |
| title | Local cohesion of splats in hybrid plasma spray coating as observed by in-situ experiment |
| title_full | Local cohesion of splats in hybrid plasma spray coating as observed by in-situ experiment |
| title_fullStr | Local cohesion of splats in hybrid plasma spray coating as observed by in-situ experiment |
| title_full_unstemmed | Local cohesion of splats in hybrid plasma spray coating as observed by in-situ experiment |
| title_short | Local cohesion of splats in hybrid plasma spray coating as observed by in-situ experiment |
| title_sort | local cohesion of splats in hybrid plasma spray coating as observed by in situ experiment |
| topic | plasma spraying hybrid coating in-situ SEM strain mapping cohesion |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/10364 |
| work_keys_str_mv | AT radekmusalek localcohesionofsplatsinhybridplasmaspraycoatingasobservedbyinsituexperiment AT tomastesar localcohesionofsplatsinhybridplasmaspraycoatingasobservedbyinsituexperiment AT jakubminarik localcohesionofsplatsinhybridplasmaspraycoatingasobservedbyinsituexperiment AT jonasdudik localcohesionofsplatsinhybridplasmaspraycoatingasobservedbyinsituexperiment |