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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Evaluation of Internal Cohesion of Multiphase Plasma-Sprayed Coatings by Cavitation Test: Feasibility Study
Original language description
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.
Czech name
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Czech description
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Project
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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

Article name in the collection
14th INTERNATIONAL CONFERENCE ON LOCAL MECHANICAL PROPERTIES - LMP 2019
ISBN
978-80-01-06735-2
ISSN
2336-5382
e-ISSN
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Number of pages
6
Pages from-to
73-78
Publisher name
České vysoké učení technické v Praze
Place of publication
Praha
Event location
CIIRC, Praha
Event date
Nov 6, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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