Morphology of hydroxyapatite nanoparticles in coatings on nanotube-formed Ti-Nb-Zr alloys for dental implants

作者：Jeong Yong Hoon; Kim Eun Ju; Brantley William A; Choe Han Cheol^*

来源：Vacuum, 2014, 107: 297-303.

DOI：10.1016/j.vacuum.2014.03.004

• Hydroxyapatite
• Nanotube structure
• Ti-29Nb-xZr alloy
• Electrodeposition
• Coating

The deposition and morphology of hydroxyapatite (HA) nanoparticles on nanotube-formed Ti-Nb-Zr alloys for dental implants has been investigated utilizing electrochemical, field-emission scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy (FTIR) methods. Ti-29Nb-xZr ternary alloys with 3 and 15 wt.% Zr content were prepared by arc melting. Nanotubular oxide layers were formed on these alloys by an anodic oxidation method in 1 M H3PO4 electrolyte containing 0.8 wt.% NaF at room temperature. Hydroxyapatite coatings were deposited onto the nanotubular surfaces via an electrochemical method (pulsed current). The HA layers were well-deposited and contained features of the underlying nanotube structure; observed morphologies consisted of particles, a mixture of particles and plate-like shapes, and entirely plate-like shapes. This variation in morphology occurred with an increasing number of deposition cycles and increases in Ca and P concentrations in the electrolyte. X-ray diffraction revealed that the nanotubular coating contained the anatase form of TiO2, and FTIR indicated that the electrochemically deposited calcium phosphate layer contained HPO42-, PO43-, H2O, and OH- indicative of the HA composition.

• 出版日期2014-9