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Updated: Feb 26, 2026
Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications
Published on: December 8, 2015
A bioactive coating with submicron-sized titania crystallites fabricated by induction heating of titanium after
Ning-Bo Li1, Wen-Hua Xu1, Gui-Yong Xiao1
1Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Ji'nan 250061, China; Suzhou Institute, Shandong University, Suzhou 215123, China; School of Materials Science and Engineering, Shandong University, Ji'nan 250061, China.
Abstract:
Thermal oxidation technology was widely investigated as one of effective surface modification method for improving the bioactivity and biocompatibility of titanium and its alloys. In this work, the induction heat oxidization method, a fast, efficient, economical and environmental protective technology, was applied to prepare the submicron-morphological oxide coating with variable rutile TiO2 equiaxed crystallites on the surface of pure Ti substrates after cold-drawing with 10-20% deformations. The results showed the plastic-deformed Ti cylinders recrystallized during induction heating treatment (IHT) for 10-20s which resulted in evolution of microstructures as well as slight improvement of microhardness. The surface characteristics of TiO2 crystallites in oxidation layers were determined by the microstructural evolutions of Ti substrate in terms of the nucleation and growth of TiO2 crystallites. Specially, the oxidized surface with 50-75nm roughness and more uniform and finer equiaxed oxide grains remarkablely improved the apatite deposition after bioactive evaluation in 1.5 × SBF for 7 days. This work provided a potential method to create controlled bioactive oxide coatings with submicro-/nano-scaled TiO2 crystallites on titanium substrate in terms of the role of metallographic microstructure in the formation process of titanium oxides.
