Development of Ti-Mo alloys for biomedical applications: microstructure and electrochemical characterization

Author(s)

Oliveira, Nilson T. C. ^[1] ; Aleixo, Giorgia ; Caram, Rubens ; Guastaldi, Antonio C. ^[4]

Affiliation

^[1] Universidade Estadual Paulista (UNESP). Campus de Araraquara. Instituto de Química - Brasil

^[4] Universidade Estadual Paulista (UNESP). Campus de Araraquara. Instituto de Química - Brasil

• Document type: Journal article
• Source: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 452/453, p. 727-731, Apr. 2007.
• Field of knowledge: Physical Sciences and Mathematics - Chemistry

Abstract

Ti-Mo alloys from 4 to 20 Mo wt.% were arc-melted. Their compositions and surfaces were analyzed by EDX, XRF and SEM. The Mo mapping shows a homogeneous distribution for all alloys. The XRD analysis showed that the crystal structure of the alloys is sensitive to the Mo concentration; a mixture of the hexagonal alpha" and orthorhombic alpha" phases was observed for the Ti-4Mo alloy, and the alpha" phase is observed almost exclusively when the concentration of Mo added to the Ti reaches 6%. A significant retention of the beta phase is observed for the alloy containing 10% Mo, while at higher Mo concentrations (15% and 20%), retention of phase beta is only verified. Preliminary electrochemical studies have indicated a valve-metal behavior and good corrosion resistance in aerated Ringer solution for all alloys. (AU)