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COMPARATIVE STUDY OF FRETTING BEHAVIOURS OF HVOF-SPRAYED COATINGS AT ROOM AND HIGH TEMPERATURE

1 SMAZALOVÁ Eva
Co-authors:
1 HOUDKOVÁ Šárka
Institution:
1 University of W est Bohemia, Pilsen, Czech Republic, EU, smazal@ntc.zcu.cz, houdkov@ntc.zcu.cz
Conference:
24th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, June 3rd - 5th 2015
Proceedings:
Proceedings 24th International Conference on Metallurgy and Materials
Pages:
1170-1174
ISBN:
978-80-87294-58-1
ISSN:
2694-9296
Published:
12th January 2015
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
258 views / 85 downloads
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Abstract

This paper provides a study of sliding wear behavior of Cr3C2-CoNiCrAlY thermally sprayed coating at room and high temperature - 600°C. Wear testing was realized by linearly reciprocating Ball-on-Flat sliding wear test according to ASTM G133-05, so called fretting test using the tribometer CETR-UMT3. The evaluation addresses specifically wear resistance, friction characteristic and sliding wear mechanisms. The coatings were examined by SEM imaging. The Cr3C2-CoNiCrAlY HVOF coating proved its potential as a coating for high temperature sliding or fretting application. Measured COF decreased together with increasing temperature. On the other hand, the wear resistance decreased at high temperature in the vicinity of oxide originated in the wear scar.

Keywords: Fretting, tribological properties, thermal spraying

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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