Due to the excellent biocompatibility coupled with good corrosion resistance, titanium alloys have found great applications for orthopaedic and dental implants since 1970. However the Young's modulus of these alloys is still about 2 to 4 times greater than the human bone, resulting in implant wear and pain to the patient. One of the titanium alloys used in orthopaedic implants in Brazil is Ti-6Al-4V, that has twice the mechanical resistance compared with pure titanium. However, studies have found that vanadium is cytotoxic, while aluminum has been associated with neurological disorders when used for long term. The major current challenge for materials science is developing new titanium alloys without the presence of these elements while maintaining advantageous properties such as excellent biocompatibility and low modulus of elasticity. The objective of the project is to study the influence of substituional solutes in crystalline structure and microstructure of a ternary titanium alloy. It will be produced and characterized a titanium alloy with the addition of 15% in weight of zirconium and 7.5% in weight of molybdenum and (Ti-15Zr-7.5Mo). Structural analysis will be performed by x-ray diffraction, with subsequent refinement of x-ray diffraction diffractogram with the Rietveld method to analyze the variation of lattice parameters and phase number. Microstructural analysis will be carried out by means of optical and electronic microscopy. An analysis of the mechanical properties of the alloy is obtained through measurements of Vickers microhardness and elasticity modulus.
News published in Agência FAPESP Newsletter about the scholarship: