Titanium Oxide (TiO2) Coatings on NiTi Shape Memory Substrate Using Electrophoretic Deposition Process

Abstract

The aim of the present research is to convert bioinert surface of NiTi to bioactive and biocompatible surface. In order to develop a bioactive and corrosion resistant film on NiTi, electrophoretic deposition process was done and TiO2 particles were deposited on the NiTi surface. Suspensions including TiO2 particles were prepared using a mixture of acetone and n-butanol (0%, 30%, 60%, 80% and 100% acetone) without using any dispersant. Sedimentation test was used to characterize the suspensions. SEM investigations on surface morphology of coatings shows deposition within 0% acetone cause to crack-free and dense coating with relatively coarse grains and high corrosion resistance.

Functionalization of the NiTi Shape Memory Alloy Surface by HAp/SiO2/Ag Hybrid Coatings Formed on SiO2-TiO2 Glass Interlayer

“…Unfortunately, the long-term use of NiTi alloy implants necessitates the improvement of their corrosion resistance and biocompatibility [5][6][7]. This goal might be achieved by modifying the alloy surface by protective coatings made of ceramics [8][9][10][11], polymers [12], metals [13], diamond-like carbon-DLC [14], or complex composite layers [15][16][17][18].…”

Surface Activation of Ni-Ti Alloy Using Electrochemical Process for Biomimetic Deposition of Hydroxyapatite Coating

“…Between Ti alloys, Ni-Ti alloy with a nearly equal atomic ratio of Ni and Ti has been increasingly used in medical and dental applications due to its high corrosion resistance and good biocompatibility [6][7][8]. Unfortunately, titanium and its alloys are bioinert and easily encapsulated after implanting into the living body by fibrous tissue that isolates them from the surrounding bone [9][10][11]. Furthermore, the high Ni content in the Ni-Ti alloy is one of the great concerns with regards to its biocompatibility.…”