Hydroxyapatite production on ultrafine-grained pure titanium by micro-arc oxidation and hydrothermal treatment

Tribological properties of ultrafine-grained materials processed by severe plastic deformation

“…It was found that the UFG Ti processed by ECAP plus cold rolling had the lowest coefficient of friction especially at higher temperatures, which indicates that the finer grained UFG Ti has a lower tendency for seizure at higher temperatures and higher wear resistance than CG Ti. Mass loss versus number of passes of ECAP for Al-1050 alloy [35] To examine the effect of surface coating on wear behaviour, CP Ti was recently processed by ECAP and then subjected to microarc oxidation (MAO) and hydrothermal treatment (HT) with hydroxyapatite (HA)-containing titania (TiO 2 ) coating [42]. The wear behaviour of UFG Ti was systematically investigated before and after surface modification.…”

Review of the biocompatibility of micro-arc oxidation coated titanium alloys

“…The MAO coated surface can contain calcium and phosphorus ions according to the selected electrolyte. These precipitations containing Ca-P ions in the titanium oxide layer can further crystallized into HA through a hydrothermal treatment [23]. The HA facilitates the adhesion of cells and growth of new bones.…”

Processing of an ultrafine-grained titanium by high-pressure torsion: An evaluation of the wear properties with and without a TiN coating

“…In practice, the sliding motion between the femoral and acetabular metal components will generate metallic debris that may cause pain in the patient and lead ultimately to mechanical failure of the device (Marino and Mascaro, 2004;Diomidis et al, 2012). To address this problem, several studies have been conducted to evaluate the wear behaviour of UFG Ti La et al, 2005;Purcek et al, 2009;Faghihi et al, 2010;Alsaran et al, 2011). Initially, friction studies at various temperatures under high load conditions showed that the high strength after ECAP processing improved the load-bearing capacity and reduced the coefficient of friction (COF) of Ti .…”

“…Earlier experiments showed that the wear resistance of UFG pure Ti may be improved significantly by using a micro-arc oxidation and hydrothermal treatment to form a porous oxide layer with a thickness of $10 mm on the surface of UFG Ti (Alsaran et al, 2011). This suggests the possibility of combining SPD processing and coating technology to fabricate a coated UFG Ti having high strength and excellent corrosion and wear resistance for use in biomedical applications.…”