Improving tribological performance with oxidationprocess for boronized TI6AL4V alloys


Bozkurt Y. B., Seçer Kavasoğlu Y., Kovacı H., Uzun Y., Çelik A.

6nd International Conference on Material Science and Technology in Cappadocia (IMSTEC’21), Nevşehir, Türkiye, 26 - 28 Kasım 2021, ss.274-278

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Nevşehir
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.274-278
  • Atatürk Üniversitesi Adresli: Evet

Özet

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.