Synthesis and Characterization of Hydroxyapatite/TiO2 Coatings on the beta-Type Titanium Alloys with Different Sintering Parameters using Sol-Gel Method


DİKİCİ B., Niinomi M., Topuz M. , Say Y., AKSAKAL B., YILMAZER H., ...Daha Fazla

PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES, cilt.54, ss.457-462, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 54 Konu: 3
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1134/s2070205118030255
  • Dergi Adı: PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES
  • Sayfa Sayıları: ss.457-462

Özet

In this study, hydroxyapatite (HA) based composite films were successfully syntheses on the beta-type Ti29Nb13Ta4.6Zr (TNTZ). The solutionized TNTZ substrates coated with HA and HA/Titania (TiO2) bioactive composite coatings by sol-gel method under various sintering parameters related to sintering temperatures and heating ramp rates. Microstructural observations of the coatings revealed that apatite was formed on the substrates. The hardness values of the coatings increase with increasing both the sintering temperature and the TiO2 concentration in the coatings layer. However, it was found that the heating ramp rate of the sintering was not affecting the hardness values so much. Also, the hardness values of the HA/TiO2 composite coatings at all sintering temperatures were higher than only HA coated TNTZ samples due to the existence TiO2 phases in the HA matrix. Results indicating that the doping of HA with TiO2, improve the physical consistency between the coating layer and the substrates and provide a better inter-particle bonding due to the existence TiO2 phases in the HA.

In this study, hydroxyapatite (HA) based composite films were successfully syntheses on the β-type Ti29Nb13Ta4.6Zr (TNTZ). The solutionized TNTZ substrates coated with HA and HA/Titania (TiO2) bioactive composite coatings by sol-gel method under various sintering parameters related to sintering temperatures and heating ramp rates. Microstructural observations of the coatings revealed that apatite was formed on the substrates. The hardness values of the coatings increase with increasing both the sintering temperature and the TiO2concentration in the coatings layer. However, it was found that the heating ramp rate of the sintering was not affecting the hardness values so much. Also, the hardness values of the HA/TiO2 composite coatings at all sintering temperatures were higher than only HA coated TNTZ samples due to the existence TiO2 phases in the HA matrix. Results indicating that the doping of HA with TiO2, improve the physical consistency between the coating layer and the substrates and provide a better inter-particle bonding due to the existence TiO2 phases in the HA.