1 results listed
Abstract
Metals and their alloys used in the biomedical industry due to their high mechanical and good fatigue properties
[1]. It is well known that titanium (Ti) and its alloys are the most popular metallic materials used as implant [2]. Ti alloys
are classified into 3 main groups as microstructure. This are α type (e.g. pure Ti), α+β type (e.g. Ti6Al4V) and β type
(e.g. Ti–29Nb–13Ta–4.6Zr, described as TNTZ) alloys [3-4]. The major properties for a metallic biomaterial are no doubt
biocompatibility and corrosion resistance [5]. Farnoush et al. [6] found that bioglass which composed in HA/bioglass
coatings behaves as aide for sintering process as well as responsible for transformation of HA to β-TCP which is thought
to be more bioactive material due to ion exchange capability. Other findings of the study were that with addition of
bioglass both bonding strength [7] and corrosion resistance were increased. Also with bioglass coating higher oxide film
stability obtained in simulated body fluid. Another study was revealed that with bioglass addition and increased sintering
temperatures up to 700°C is more protective than pristine Ti6Al4V substrates in terms of corrosion resistance [8]. In this
study, bioglass (45S5) doped hydroxyapatite (Ca10(PO4)6(OH)2) coatings has been successfully synthesized by sol-gel
technique on different Ti alloys. The corrosion resistances of the coatings have been measured under in-vitro conditions
by a potentiostat/galvanostat. Potentiodynamic polarization scanning (PDS) tests were performed on the samples in the
Ringer’s solution (simulated body fluid, SBF) [9]. The surface morphologies of the coated sample on the different Ti
alloys are presented in Fig. 1 The PDS results of CP Ti, Ti6Al4V and TNTZ alloys in Ringer's solutions at 37°C were
shown in Fig. 2a–c. In addition, some important parameters calculated from the curves have been collected in Table
International Symposium on Light Alloys and Composite Materials
UHAKS
Mehmet Topuz
Burak Dikici
Serap Koç
Mitsuo Niinomi
Masaaki Nakai