The Role of Microstructure on Wettability of Plasma Sprayed Yttria Stabilized Zirconia Coatings

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F17%3APU124363" target="_blank" >RIV/00216305:26620/17:PU124363 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389021:_____/17:00489903

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Role of Microstructure on Wettability of Plasma Sprayed Yttria Stabilized Zirconia Coatings

Popis výsledku v původním jazyce

Atmospheric plasma spraying utilizing initial powder materials in micrometric size has been successfully used for various applications in different fields of the industry over the past several decades. Nowadays, the new trend in plasma spraying is to use sub-micron or nano-sized powder feedstocks in the form of colloidal suspension. This relatively new technology enables to obtain specific types of dense vertically cracked, fully dense or columnar microstructure. The aim of this work is microstructures, i.e. lamellar and columnar, were sprayed from chemically the same yttria-stabilized zirconia ceramics by means of conventional atmospheric plasma spray and suspension water stabilized plasma spray techniques, respectively. Microstructural and phase composition of the initial powders and as-sprayed coatings were investigated using optical microscopy, scanning electron microscopy and X-ray diffraction techniques. Topography of coatings surface was measured by means of non-contact optical profilometry. The YSZ coatings wettability was evaluated based on water droplet contact angle using Sessile droplet method. The coatings microstructure reveals the important role in the change of droplet contact angle, where lamellar structure was found close to hydrophilic-hydrophobic transition and columnar structure was found almost superhydrophobic.

Název v anglickém jazyce

The Role of Microstructure on Wettability of Plasma Sprayed Yttria Stabilized Zirconia Coatings

Popis výsledku anglicky

Atmospheric plasma spraying utilizing initial powder materials in micrometric size has been successfully used for various applications in different fields of the industry over the past several decades. Nowadays, the new trend in plasma spraying is to use sub-micron or nano-sized powder feedstocks in the form of colloidal suspension. This relatively new technology enables to obtain specific types of dense vertically cracked, fully dense or columnar microstructure. The aim of this work is microstructures, i.e. lamellar and columnar, were sprayed from chemically the same yttria-stabilized zirconia ceramics by means of conventional atmospheric plasma spray and suspension water stabilized plasma spray techniques, respectively. Microstructural and phase composition of the initial powders and as-sprayed coatings were investigated using optical microscopy, scanning electron microscopy and X-ray diffraction techniques. Topography of coatings surface was measured by means of non-contact optical profilometry. The YSZ coatings wettability was evaluated based on water droplet contact angle using Sessile droplet method. The coatings microstructure reveals the important role in the change of droplet contact angle, where lamellar structure was found close to hydrophilic-hydrophobic transition and columnar structure was found almost superhydrophobic.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20506 - Coating and films

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Metal 2017 Conference Prosceedings

ISBN

978-80-87294-79-6

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

1116-1121

Název nakladatele

TANGER Ltd.

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

24. 5. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000434346900178