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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Evaluation of Internal Cohesion of Plasma-Sprayed Coatings by Cavitation Test: Feasibility Study
Original language description
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.
Czech name
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Czech description
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Project
<a href="/en/project/GA19-10246S" target="_blank" >GA19-10246S: Deposition mechanisms and properties of multiphase plasma sprayed coatings prepared with liquid feedstocks</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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