Determination of Wear Behaviour of Titanium Alloys Implant Materials Blasted With Mixture of Zirconia Silica Hydroxyapatite Powders


Hazar A. B. , Uzunsoy D., Ekşioğlu H., Sen O., Demir H., Ömürlü V. E. , et al.

Journal Of Biomechanics, cilt.43, ss.56-57, 2010 (SCI Expanded İndekslerine Giren Dergi)

  • Cilt numarası: 43
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/s0021-9290(10)70122-6
  • Dergi Adı: Journal Of Biomechanics
  • Sayfa Sayısı: ss.56-57

Özet

M-13 Determination of Wear Behaviour of Titanium Alloys Implant Materials Blasted With Mixture of Zirconia/Silica/Hydroxyapatite Powders

A.B. Hazar1, D. Uzunsoy1, H. Ek ¸sio˘glu1, O. Sen1, H. Demir1, V. Om ¨url ¨u ¨ 1, A. Koyun1.

1Yıldız Technical University, Turkey

Titanium (Ti) and titanium alloys are widely used in biomedical applications as well as in cardiac and cardiovascular applications, Oral and Poster Presentations / Journal of Biomechanics 43S1 (2010) S23–S74 S57 especially as hard tissue replacements, because of their desirable properties, such as relatively low modulus, good fatigue strength, formability, machinability, corrosion resistance, and biocompatibility. However, titanium and its alloys cannot meet sufficiently all of the clinical requirements. Therefore, in order to improve the biological, chemical, and mechanical properties, surface modification is often performed. In recent years, many research efforts have been concentrated on the development of surface modification techniques like mechanical, laser, thermal, sol–gel, chemical and electrochemical treatments etc. for titanium and its alloys [1]. Recent works have shown that the wear resistance, corrosion resistance, and biological properties of titanium and titanium alloys can be improved selectively by appropriate surface treatment techniques while the desirable bulk attributes of the materials are retained [2]. Ti6Al4V alloy has been widely used as a suitable material for surgical implants such as artificial hip joints. These materials possess outstanding corrosion resistance due to a dense and passive oxide film on the surface. Although this alloy is biocompatible, its wear resistance is inadequate. Therefore, grid-blasting method as one of the mechanical modification techniques is used to obtain specific surface topographies and roughness, remove surface contamination, improve the mechanical and biological adhesion in hard tissues. The blasting materials like alumina (Al2O3), zirconia (ZrO2), silica (SiO2), hydroxyapatite (HA) etc. are frequently used as a blasting media to obtain improved surface properties. The blasting process applied for the surface properties of titanium based implant materials is widely used in medical applications. Nowadays, ZrO2/SiO2 and HA blasting powders are performed extensively, the surfaces of Ti-based implant materials to modify surface topography and to improve biocompatibility of the Ti-based implant materials. In this study, the surfaces of Ti6Al4V (Grade 5) samples are blasted by different ratio of ZrO2/HA powders. The blasted samples are characterized by several techniques such as scanning electron microscopy (SEM) with energy dispersive X-ray (EDX), X-ray diffractiometry (XRD), X-ray fluorescence spectrometry (XRF), and profilometry. The blasting process leads to an improvement in the chemical, topographical and biocompatibility characteristics of the samples. The dry sliding wear test of the samples is performed using pin-on disc equipment. The worn surfaces are characterized by SEM to determine the wear characteristic of Ti-based blasted material. Reference(s) [1] Xuanyong Liu, Paul K. Chu, Chuanxian Ding, “Surface modification of titanium, titanium alloys, and related materials for biomedicals applications”, Materials Science and Engineering: R: Reports 47(3–4): pp. 49–121. [2] Yukari Iwaya, Miho Machigashira, Kenji Kanbara, Motoharu Miyamoto, Kazuyuki Noguchi, Yuichi Izumi and Seiji Ban, “Surface Properties and Biocompatibility of Acid-etched-Titanium”, Dental Materials Journal 2008; 27(3): pp. 415–421.