Evaluation of Internal Cohesion of Multiphase Plasma-Sprayed Coatings by Cavitation Test: Feasibility Study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00347091" target="_blank" >RIV/68407700:21340/20:00347091 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.14311/APP.2020.27.0073" target="_blank" >https://doi.org/10.14311/APP.2020.27.0073</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/APP.2020.27.0073" target="_blank" >10.14311/APP.2020.27.0073</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of Internal Cohesion of Multiphase Plasma-Sprayed Coatings by Cavitation Test: Feasibility Study

Popis výsledku v původním jazyce

Mechanical characterization of plasma-sprayed coatings at microscopic level represents a major challenge due to the presence of numerous inherent microstructural features such as cracks, pores, or splat boundaries, which complicate coatings characterization by conventional testing methods. Need for reliable testing of structural integrity of newly developed multiphase plasma-sprayed coatings introduced even more complexity to the testing. In this study, applicability of indirect vibratory cavitation test (adapted from ASTM G32 standard) for such testing was evaluated. Three plasmasprayed coatings having distinctive microstructures were tested: i) conventional alumina coating deposited from coarse powder, ii) hybrid coating deposited by co-spraying of coarse alumina powder and fine yttria-stabilized zirconia (YSZ) suspension, and iii) compact alumina coating deposited from fine ethanol-based suspension. Differences in the coatings internal cohesion were reflected in different failure mechanisms observed within the cavitation crater by scanning electron microscopy and mean erosion rates being i) 280 μm/hour, ii) 97 μm/hour and iii) 14 μm/hour, respectively.

Název v anglickém jazyce

Evaluation of Internal Cohesion of Multiphase Plasma-Sprayed Coatings by Cavitation Test: Feasibility Study

Popis výsledku anglicky

Mechanical characterization of plasma-sprayed coatings at microscopic level represents a major challenge due to the presence of numerous inherent microstructural features such as cracks, pores, or splat boundaries, which complicate coatings characterization by conventional testing methods. Need for reliable testing of structural integrity of newly developed multiphase plasma-sprayed coatings introduced even more complexity to the testing. In this study, applicability of indirect vibratory cavitation test (adapted from ASTM G32 standard) for such testing was evaluated. Three plasmasprayed coatings having distinctive microstructures were tested: i) conventional alumina coating deposited from coarse powder, ii) hybrid coating deposited by co-spraying of coarse alumina powder and fine yttria-stabilized zirconia (YSZ) suspension, and iii) compact alumina coating deposited from fine ethanol-based suspension. Differences in the coatings internal cohesion were reflected in different failure mechanisms observed within the cavitation crater by scanning electron microscopy and mean erosion rates being i) 280 μm/hour, ii) 97 μm/hour and iii) 14 μm/hour, respectively.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

14th INTERNATIONAL CONFERENCE ON LOCAL MECHANICAL PROPERTIES - LMP 2019

ISBN

978-80-01-06735-2

ISSN

2336-5382

e-ISSN

—

Počet stran výsledku

6

Strana od-do

73-78

Název nakladatele

České vysoké učení technické v Praze

Místo vydání

Praha

Místo konání akce

CIIRC, Praha

Datum konání akce

6. 11. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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