Editors: | Kongoli F, Yildirim H, Hainer S, Hofmann K, Proske T, Graubner C.A., Albert B |
Publisher: | Flogen Star OUTREACH |
Publication Year: | 2015 |
Pages: | 200 pages |
ISBN: | 978-1-987820-29-4 |
ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Polyetheretherketone (PEEK) coatings were electrophoretically (EPD) deposited on the near-beta Ti13Zr13Nb titanium alloy. Suspension composition and EPD parameters were investigated in detail. Post heat treatment was performed to improve the adhesion of the as-deposited coatings to the underlying substrate. A microstructure of the titanium alloy and the coatings was investigated by light microscopy, scanning and transmission electron microscopy as well as by X-ray diffractometry. Atomic force microscopy was used for investigation of surface topography of the coated alloy. It was found that the 60-70 microns thick coatings were semi-crystalline and homogeneous, without any cracks or voids. Micro-scratch tests revealed a very good adhesion of the heat treated coatings to the Ti13Zr13Nb alloy. The friction and wear properties of the uncoated and coated alloy were evaluated using a ball-on-disk apparatus at unlubricated contact. The coating essentially improved the frictional wear resistance and decreased a coefficient of friction of the titanium alloy substrate. This work showed that EPD is a very useful method to deposit uniform polymer PEEK coatings on near-beta titanium alloy substrate for tribological applications.
ACKNOWLEDGMENTS
This work was supported by the Polish National Science Centre (decision no. DEC-2013/09/B/ST8/00145). A part of this study (tribological tests) was supported by the AGH-UST (project no 11.11.110.293).