Effects of Thermal Exposure on Microstructure of Thermal Barriers Deposited by Hybrid Plasma Spraying

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00581976" target="_blank" >RIV/61389021:_____/23:00581976 - isvavai.cz</a>

Výsledek na webu

<a href="https://dl.asminternational.org/itsc/proceedings-abstract/ITSC2023/84536/422/26340" target="_blank" >https://dl.asminternational.org/itsc/proceedings-abstract/ITSC2023/84536/422/26340</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.31399/asm.cp.itsc2023p0422" target="_blank" >10.31399/asm.cp.itsc2023p0422</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of Thermal Exposure on Microstructure of Thermal Barriers Deposited by Hybrid Plasma Spraying

Popis výsledku v původním jazyce

Hybrid plasma spraying combines plasma spraying of dry powders and liquids (suspensions and solutions). Combination of these two approaches allows deposition of microstructures consisting of both conventional coarse and ultrafine splats. Moreover, splats with dissimilar size may have also different chemistry. Such combination is potentially interesting for many fields of thermal spraying, including thermal barrier coatings (TBCs), as novel microstructures may be economically and relatively easily obtained. The technology has recently reached a level, where coatings with interesting hybrid microstructures may be reliably deposited, so that their potential for practical applications may be evaluated. In this study, first experimental TBCs with YSZ-based hybrid topcoat were deposited by hybrid water/argon stabilized plasma (WSP-H) technology. Al2O3 and YAG were selected as secondary phase deposited from suspension as both provide strong materials contrast in scanning electron microscope (SEM) so they can be used as “markers” in the coating microstructure. Samples were exposed to thermal cycling simulating in-service TBC conditions in order to test their thermal shock resistance. Changes of the coating microstructure were studied by SEM analysis and X-ray diffraction.

Název v anglickém jazyce

Effects of Thermal Exposure on Microstructure of Thermal Barriers Deposited by Hybrid Plasma Spraying

Popis výsledku anglicky

Hybrid plasma spraying combines plasma spraying of dry powders and liquids (suspensions and solutions). Combination of these two approaches allows deposition of microstructures consisting of both conventional coarse and ultrafine splats. Moreover, splats with dissimilar size may have also different chemistry. Such combination is potentially interesting for many fields of thermal spraying, including thermal barrier coatings (TBCs), as novel microstructures may be economically and relatively easily obtained. The technology has recently reached a level, where coatings with interesting hybrid microstructures may be reliably deposited, so that their potential for practical applications may be evaluated. In this study, first experimental TBCs with YSZ-based hybrid topcoat were deposited by hybrid water/argon stabilized plasma (WSP-H) technology. Al2O3 and YAG were selected as secondary phase deposited from suspension as both provide strong materials contrast in scanning electron microscope (SEM) so they can be used as “markers” in the coating microstructure. Samples were exposed to thermal cycling simulating in-service TBC conditions in order to test their thermal shock resistance. Changes of the coating microstructure were studied by SEM analysis and X-ray diffraction.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Thermal Spray 2023: Proceedings from the International Thermal Spray Conference

ISBN

978-1-62708-453-6

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

422-427

Název nakladatele

ASM International

Místo vydání

Québec City

Místo konání akce

Quebec City

Datum konání akce

22. 5. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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