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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F20%3A00538124" target="_blank" >RIV/61389021:_____/20:00538124 - isvavai.cz</a>

Výsledek na webu

<a href="https://ojs.cvut.cz/ojs/index.php/APP/article/view/6691/5733" target="_blank" >https://ojs.cvut.cz/ojs/index.php/APP/article/view/6691/5733</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 Plasma-Sprayed Coatings by Cavitation Test: Feasibility Study

Popis výsledku v původním jazyce

Mechanical characterization of plasma-sprayed coatings at microscopic level representsa 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 coatingsintroduced even more complexity to the testing. In this study, applicability of indirect vibratorycavitation test (adapted from ASTM G32 standard) for such testing was evaluated. Three plasma-sprayed coatings having distinctive microstructures were tested: i) conventional alumina coatingdeposited from coarse powder, ii) hybrid coating deposited by co-spraying of coarse alumina powderand fine yttria-stabilized zirconia (YSZ) suspension, and iii) compact alumina coating deposited fromfine ethanol-based suspension. Differences in the coatings internal cohesion were reflected in differentfailure mechanisms observed within the cavitation crater by scanning electron microscopy and meanerosion rates being i) 280μm/hour, ii) 97μm/hour and iii) 14μm/hour, respectively.

Název v anglickém jazyce

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

Popis výsledku anglicky

Mechanical characterization of plasma-sprayed coatings at microscopic level representsa 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 coatingsintroduced even more complexity to the testing. In this study, applicability of indirect vibratorycavitation test (adapted from ASTM G32 standard) for such testing was evaluated. Three plasma-sprayed coatings having distinctive microstructures were tested: i) conventional alumina coatingdeposited from coarse powder, ii) hybrid coating deposited by co-spraying of coarse alumina powderand fine yttria-stabilized zirconia (YSZ) suspension, and iii) compact alumina coating deposited fromfine ethanol-based suspension. Differences in the coatings internal cohesion were reflected in differentfailure mechanisms observed within the cavitation crater by scanning electron microscopy and meanerosion rates being i) 280μm/hour, ii) 97μm/hour and iii) 14μm/hour, respectively.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA19-10246S" target="_blank" >GA19-10246S: Depoziční mechanismy a vlastnosti vícefázových plazmových nástřiků připravených s pomocí kapalné fáze</a><br>

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 periodika

Acta polytechnica

ISSN

1210-2709

e-ISSN

—

Svazek periodika

27

Číslo periodika v rámci svazku

Červen

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

6

Strana od-do

73-78

Kód UT WoS článku

000700368300014

EID výsledku v databázi Scopus

2-s2.0-85100896559