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Comparison of WSP and HVOF Sprayed Alumina Coatings Behavior during Mechanical Loading
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SYSNO ASEP 0352072 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Comparison of WSP and HVOF Sprayed Alumina Coatings Behavior during Mechanical Loading Author(s) Pejchal, V. (CZ)
Mušálek, R. (CZ)
Matějíček, Jiří (UFP-V) RID, ORCIDSource Title Vrstvy a povlaky 2010. - Trenčín : LISS a.s, 2010 / Šošovičková J. - ISBN 978-80-970514-2-6 Pages s. 69-74 Number of pages 6 s. Action Vrstvy a povlaky 2010 Event date 04.10.2010-05.10.2010 VEvent location Rožnov pod Radhoštěm Country CZ - Czech Republic Event type EUR Language eng - English Country SK - Slovakia Keywords thermal spray ; WSP ; HVOF ; alumina ; 4PB ; SAR Subject RIV JK - Corrosion ; Surface Treatment of Materials R&D Projects ME 901 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z20430508 - UFP-V (2005-2011) Annotation In this study, alumina coatings were deposited using water stabilized plasma (WSP) and high-velocity oxy-fuel (HVOF) process with two different spraying setups. Different deposition conditions resulted in different pores and cracks morphology and, for one HVOF setup, in creation of deliberately introduced vertical macro-cracks. Coated samples were subjected to four-point bending (4PB) test. Slurry abrasive response (SAR) test, corresponding to ASTM G75-01, was carried out to compare coatings wear resistance. The microstructure of the samples was observed in SEM on cross-section and free-surface before and after wear test. In addition, coating hardness was determined on the cross-sections. Relation between microstructure features and macroscopic mechanical properties of the coatings is discussed. Tests carried out for coatings with the same chemical composition but different microstructure proved strong dependency of coatings mechanical properties on voids morphology. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2011
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