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Preparation a characterization of a titanium alloy containing zirconium and molybdenum for biomedical applications

Grant number: 12/22742-6
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): February 01, 2013
Effective date (End): December 31, 2013
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
Principal Investigator:Carlos Roberto Grandini
Grantee:Pedro Akira Bazaglia Kuroda
Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil


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.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
KURODA, P. A. B.; LOURENCO, M. L.; CORREA, D. R. N.; GRANDINI, C. R.. Thermomechanical treatments influence on the phase composition, microstructure, and selected mechanical properties of Ti-20Zr-Mo alloys system for biomedical applications. Journal of Alloys and Compounds, v. 812, . (15/09480-0, 12/22742-6)
CORREA, D. R. N.; KURODA, P. A. B.; LOURENCO, M. L.; FERNANDES, C. J. C.; BUZALAF, M. A. R.; ZAMBUZZI, W. F.; GRANDINI, C. R.. Development of Ti-15Zr-Mo alloys for applying as implantable biomedical devices. Journal of Alloys and Compounds, v. 749, p. 163-171, . (12/22742-6, 14/22689-3, 10/20440-7, 15/00851-6)

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