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Synthesis , microstructure and cytocompatibility of new β titanium alloys for biomedical applications

We have synthetized titanium alloys containing the non cytotoxic alloying elements molybdenum and tantalum. Molybdenum stabilizes the high temperature β-phase and tantalum, a less β-stabilizer, improves the corrosion resistance of the alloy. The alloys were elaborated by two ways: levitation melting and powder metallurgy. Microstructures were characterized by optical microscopy, SEM, X-ray diffraction. The electrochemical behaviour was evaluated by measurement of the OCP evolution and linear potentiodynamic curves. Finally, the cytocompatiblity of the alloys was tested by cell culture, the influence of the rugosity and chemical composition was observed. All these characterizations make these alloys good candidates for bone substitute.