Development of a new alloy of the Ti-Zr-Mo system with low elastic modulus for biomaterial applications

• Grant number: 14/06221-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2014
• End date: December 31, 2015
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Carlos Roberto Grandini
• Grantee: Mariana Luna Lourenço
• Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil

Abstract

Metallic biomaterials are widely used as pins, plates, screws, needles and implants (dental, orthopedic and cardiovascular). Metallic biomaterials are divided into the precious metals (such as gold and silver), stainless steels, Co-Cr alloys and titanium alloys. Stainless steel and Co-Cr alloys began to be widely used during the past century, due to its properties and low cost. After World War II, titanium has aroused great interest, due to its excellent corrosion resistance, high mechanical strength and density ratio, relatively low elastic modulus and good biocompatibility. The first titanium alloys used were ± type alloys, such as commercially pure titanium and alloys developed for the aerospace industry. Then ± + ² type alloys have gained attention because of their wide range of properties, being the Ti-6Al-4V alloy widely used to this day. However, there were reports that the release of Al and V ions into the bloodstream could cause cytotoxic effects and neurological disorders (such as Alzheimer's disease). The new class of titanium alloys has sought ² type alloys, are present lower modulus of elasticity. These new alloys have been produced with the addition of mainly Mo, Zr, Ta and Nb, which are elements that do not exhibit cytotoxic reactions with the body. The aim of this study is to prepare and characterize the Ti-15Zr-2.5Mo (wt%) for biomedical applications, in order to confirm the existence of a minimum in the modulus of elasticity, predicted by Molecular Orbital theory. The alloy will be obtained by arc-melting and chemical, structural, microstructural and mechanical analysis will be performed, with the focus to better understand the relationship of the alloy microstructure and properties. (AU)

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)

NESPEQUE CORREA, DIEGO RAFAEL; VICENTE, FABIO BOSSOI; ARAUJO, RAUL OLIVEIRA; LOURENCO, MARIANA LUNA; BAZAGLIA KURODA, PEDRO AKIRA; RABELO BUZALAF, MARILIA AFONSO; GRANDINI, CARLOS ROBERTO. Effect of the substitutional elements on the microstructure of the Ti-15Mo-Zr and Ti-15Zr-Mo systems alloys. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, v. 4, n. 2, p. 180-185, APR-JUN 2015. (13/09063-5, 14/06221-1)