Heterogeneous Thermal Barrier Coatings with Engineered Gradient Interfaces

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F22%3A00566172" target="_blank" >RIV/61389021:_____/22:00566172 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.31399/asm.cp.itsc2022p0913" target="_blank" >http://dx.doi.org/10.31399/asm.cp.itsc2022p0913</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.31399/asm.cp.itsc2022p0913" target="_blank" >10.31399/asm.cp.itsc2022p0913</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Heterogeneous Thermal Barrier Coatings with Engineered Gradient Interfaces

Popis výsledku v původním jazyce

Recent development of plasma spraying with liquid feedstocks enabled deposition of novel thermal barrier coatings (TBCs) with top-coats incorporating various desirable features, such as columnar microstructure or ultrafine porosi-ty. Moreover, different materials may be relatively easily combined, e.g., by alternating feedstocks in the feed line or using feedstock mixtures. Coatings with gradient change of chemistry/microstructure towards the free-surface can be also prepared by gradual change of the feedstock composition, which may be potentially beneficial for ex-ample to mitigate stresses at the macroscopic interfaces between TBC layers (typically bond-coat/top-coat or within layered top-coat). In this study, three experimental TBCs with gradient top-coats were successfully deposited by hybrid water/argon-stabilized WSP-H plasma torch, i.e., one version of coating with 8 wt.% yttria stabilized zirconia transitioning into gadolinium zirconate Gd2Zr2O7 (YSZ→GZO) and two versions of Al2O3 transitioning into YSZ (Al2O3→YSZ). Thermal cycling fatigue (TCF) test with peak temperature of 1100 °C showed outstanding thermal shock resistance of the YSZ→GZO coating and mediocre to poor resistance of both Al2O3→YSZ coatings.

Název v anglickém jazyce

Heterogeneous Thermal Barrier Coatings with Engineered Gradient Interfaces

Popis výsledku anglicky

Recent development of plasma spraying with liquid feedstocks enabled deposition of novel thermal barrier coatings (TBCs) with top-coats incorporating various desirable features, such as columnar microstructure or ultrafine porosi-ty. Moreover, different materials may be relatively easily combined, e.g., by alternating feedstocks in the feed line or using feedstock mixtures. Coatings with gradient change of chemistry/microstructure towards the free-surface can be also prepared by gradual change of the feedstock composition, which may be potentially beneficial for ex-ample to mitigate stresses at the macroscopic interfaces between TBC layers (typically bond-coat/top-coat or within layered top-coat). In this study, three experimental TBCs with gradient top-coats were successfully deposited by hybrid water/argon-stabilized WSP-H plasma torch, i.e., one version of coating with 8 wt.% yttria stabilized zirconia transitioning into gadolinium zirconate Gd2Zr2O7 (YSZ→GZO) and two versions of Al2O3 transitioning into YSZ (Al2O3→YSZ). Thermal cycling fatigue (TCF) test with peak temperature of 1100 °C showed outstanding thermal shock resistance of the YSZ→GZO coating and mediocre to poor resistance of both Al2O3→YSZ coatings.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/GA22-21478S" target="_blank" >GA22-21478S: Vysokoentalpická depozice hybridních plazmových nástřiků</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název statě ve sborníku

Internation Thermal Spray Conference Proceedings

ISBN

978-3-96144-180-8

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

913-918

Název nakladatele

DVS Media GmbH

Místo vydání

Düsseldorf

Místo konání akce

Vídeň

Datum konání akce

4. 5. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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