Akademik Veri Yönetim Sistemi
6nd International Conference on Material Science and Technology in Cappadocia (IMSTEC’21), Nevşehir, Türkiye, 26 - 28 Kasım 2021, ss.274-278
Titanium and its alloys are
metals with strong corrosion performance that can develop a natural oxidation layer
in a corrosive environment. For this reason, they are widely used in different
implant types as biomaterials. Implant surfaces, which are exposed to body
fluids containing many organic and inorganic elements, show oxidation
resistance to support biocompatibility. This resistance not only contributes to
corrosion performance, but also allows the development of a harder morphology
on the surface. Therefore, an increase in hardness is achieved without the need
for any surface modification. There are many studies in the literature on the
analysis of electrochemical corrosion properties of self-growing titanium oxide
films. However, studies on the improvement of the tribological properties of
this natural oxide layer and its contribution to implant performance are very
limited. In this study, the natural oxide film of Ti6Al4V alloy was grown by
immersion method using simulated body fluid (SBF) and 3.5% NaCl. Then, it was performed
to wear tests and its tribological performance was analyzed depending on the
wear rate. In addition, the same tests were carried out for two different
sample groups that were boronized at a temperature of 950 °C and for 2-6 hours
with biocompatible properties. Thus, the effect of the oxidation performance of
the coated samples on the tribological characters was included in the study.
Finally, material losses were determined for three different surfaces depending
on the oxide layer development. The high surface hardness of the boronized surfaces
contributed to the wear performance. It has been determined that even if corrosion
attacks and damages develop on the coated surfaces exposed to controlled
corrosion, the wear performance increases with increasing surface hardness.
Oxide deposits developed on the surfaces of titanium boride films exhibited a
secondary type of coating character in terms of wear performance.