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Influence of Pores and Cracks Morphology on Mechanical Behavior of Thermally Sprayed Ceramics
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SYSNO ASEP 0347289 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Influence of Pores and Cracks Morphology on Mechanical Behavior of Thermally Sprayed Ceramics Author(s) Mušálek, Radek (UFP-V) RID, ORCID
Matějíček, Jiří (UFP-V) RID, ORCID
Pejchal, V. (CZ)
Mari, E. (US)
Valarezo, A. (US)
Sampath, S. (US)Source Title ITSC 2010 – International Thermal Spray Conference & Exposition: Conference Proceedings. - Düsseldorf : DVS Media GmbH, 2010 - ISBN 978-3-87155-590-9 Pages s. 723-728 Number of pages 6 s. Publication form CD-ROM - CD-ROM Action ITSC 2010 – International Thermal Spray Conference & Exposition Event date 03.05.2010-05.05.2010 VEvent location Singapore Country SG - Singapore Event type WRD Language eng - English Country DE - Germany Keywords APS coatings ; HVOF and laser glazed coatings ; influence of spray parameters ; ceramic oxide layers ; stiffness ; fatigue and fracture Subject RIV JI - Composite Materials R&D Projects ME 901 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z20430508 - UFP-V (2005-2011) Annotation Pores and cracks have significant influence on the structural rigidity and mechanical behavior of the thermally sprayed materials. For some applications dense coatings are needed, while for others (e.g. thermal barriers) some level of porosity is desirable. Recent development in thermal spraying focuses on the tailored design of pores and cracks for specific applications. In this project, ceramic coatings with different level and morphology of pores and cracks were plasma and HVOF sprayed on titanium alloy substrates. Coating microstructures were observed using scanning electron microscopy. Mechanical behavior of the prepared coatings was evaluated using four-point bending test in terms of changing coating stiffness with increasing mechanical load both in compression and tension. Significant level of coating nonlinearity and hysteresis were observed. Tests carried out for coatings with the same chemical composition but different microstructure proved strong dependency. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2011
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