EVALUATION OF INTERNAL COHESION OF MULTIPHASE PLASMA-SPRAYED COATINGS BY CAVITATION TEST: FEASIBILITY STUDY
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...
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| Format: | Article |
| Language: | English |
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Czech Technical University in Prague
2020-06-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/6691 |
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| author | Radek Mušálek Emanuele Nardozza Tomáš Tesař Jan Medřický |
| author_facet | Radek Mušálek Emanuele Nardozza Tomáš Tesař Jan Medřický |
| author_sort | Radek Mušálek |
| collection | DOAJ |
| 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. |
| format | Article |
| id | doaj-art-78c5b8bd4e1d46669636f8c0c240b9e4 |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2020-06-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-78c5b8bd4e1d46669636f8c0c240b9e42025-08-20T03:33:45ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822020-06-01270737810.14311/APP.2020.27.00735221EVALUATION OF INTERNAL COHESION OF MULTIPHASE PLASMA-SPRAYED COATINGS BY CAVITATION TEST: FEASIBILITY STUDYRadek Mušálek0Emanuele Nardozza1Tomáš Tesař2Jan Medřický3Czech Academy of Sciences, Institute of Plasma Physics, Department of Materials Engineering, Za Slovankou 1782/3, 182 00 Prague 8, Czech RepublicUniversity of Modena and Reggio Emilia, Faculty of Materials Engineering, via Pietro Vivarelli 10, Modena, ItalyCzech Academy of Sciences, Institute of Plasma Physics, Department of Materials Engineering, Za Slovankou 1782/3, 182 00 Prague 8, Czech Republic Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Trojanova 13, 120 00 Prague, CzechiaCzech Academy of Sciences, Institute of Plasma Physics, Department of Materials Engineering, Za Slovankou 1782/3, 182 00 Prague 8, Czech Republic Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Trojanova 13, 120 00 Prague, CzechiaMechanical 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.https://ojs.cvut.cz/ojs/index.php/APP/article/view/6691cavitation damage, cohesion, failure analysis, plasma spray coatings |
| spellingShingle | Radek Mušálek Emanuele Nardozza Tomáš Tesař Jan Medřický EVALUATION OF INTERNAL COHESION OF MULTIPHASE PLASMA-SPRAYED COATINGS BY CAVITATION TEST: FEASIBILITY STUDY Acta Polytechnica CTU Proceedings cavitation damage, cohesion, failure analysis, plasma spray coatings |
| title | EVALUATION OF INTERNAL COHESION OF MULTIPHASE PLASMA-SPRAYED COATINGS BY CAVITATION TEST: FEASIBILITY STUDY |
| title_full | EVALUATION OF INTERNAL COHESION OF MULTIPHASE PLASMA-SPRAYED COATINGS BY CAVITATION TEST: FEASIBILITY STUDY |
| title_fullStr | EVALUATION OF INTERNAL COHESION OF MULTIPHASE PLASMA-SPRAYED COATINGS BY CAVITATION TEST: FEASIBILITY STUDY |
| title_full_unstemmed | EVALUATION OF INTERNAL COHESION OF MULTIPHASE PLASMA-SPRAYED COATINGS BY CAVITATION TEST: FEASIBILITY STUDY |
| title_short | EVALUATION OF INTERNAL COHESION OF MULTIPHASE PLASMA-SPRAYED COATINGS BY CAVITATION TEST: FEASIBILITY STUDY |
| title_sort | evaluation of internal cohesion of multiphase plasma sprayed coatings by cavitation test feasibility study |
| topic | cavitation damage, cohesion, failure analysis, plasma spray coatings |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/6691 |
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