HAp/Ti2Ni coatings of high bonding strength on Ti–6Al–4V prepared by the eutectic melting bonding method
Eutectic melting bonding (EMB) method is a useful technique for fabricating bioactive coatings with relatively high crystallinity and bonding strength with substrate on titanium substrates. Using the EMB method, hydroxyapatite/Ti2Ni coatings were prepared on the surface of Ti–6Al–4V at a relatively low temperature (1,050 °C) in a vacuum furnace. The coatings were then characterized in terms of phase components, microstructure, bonding strength and cytotoxicity. The results showed that the coatings were mainly composed of HAp and Ti2Ni, and the thickness of the coatings was approximately 300 μm. X-ray diffraction analysis showed that the coatings exhibited relatively high crystallinity. The tensile bonding strength between the coatings and the substrates was 69.68 ± 5.15 MPa. The coatings had a porous and rough surface which is suitable for cell attachment and filopodia growth. The cell culture study showed that the number of MG-63 cells increased, and the cell morphology changed with the incubation time. This study showed that the EMB method can be utilized as a potentially powerful method to obtain high quality hydroxyapatite coatings with desired mechanical and biocompatibility properties on Ti-alloy substrates.
KeywordsBonding Strength High Bonding Strength Isothermal Solidification Eutectic Liquid TTCP
We would like to thank National Nature and Science Foundation of China (Project number: 50801052), National Basic Research Program of China (973 Program, Project number: 2011CB710905), the Fundamental Research Funds for the Central Universities (Project number: 3102014KYJD019) and Fundamental Research Foundation of Northwestern Polytechnical University (Project number: JC20100244) for their financial support.
- 5.Gittens RA, Olivares-Navarrete R, Cheng A, Anderson DM, McLachlan T, Stephan I, et al. The roles of titanium surface micro/nanotopography and wettability on the differential response of human osteoblast lineage cells. Acta Biomater. 2013;9:6268. doi: 10.1016/j.actbio.2012.12.002.CrossRefGoogle Scholar
- 17.Baker H, Okamoto H. ASM handbook. Alloy phase diagrams. 1992;3:2.Google Scholar
- 19.Xiong JT, Zhang FS, Li JL, Huang WD. Transient liquid phase bonding of magnesium alloy (AZ31B) and titanium alloy (Ti6Al4V) using aluminium interlayer. Rare Metal Mater Eng. 2006;35:1677.Google Scholar
- 34.Xiong JT, Li JL, Lu XC, Yang WH, Zhang FS, Huang WD. Morphology and reaction kinetics of the interface phase formed by diffusion bonding micron-thick Mo-Al rolled foils. Acta Metall Sin. 2008;44:943.Google Scholar