期刊
MATERIALS CHARACTERIZATION
卷 96, 期 -, 页码 273-281出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2014.08.014
关键词
Ti alloys; X-ray diffraction; Nanoindentation; Microstructure; Mechanical behavior; Corrosion
类别
资金
- Brazilian research funding agency FAPESP (State of Sao Paulo Research Foundation) [2011/23942-6]
- Brazilian research funding agency CNPq (National Council for Scientific and Technological Development) [484379/2012-7]
- Brazilian research funding agency CAPES (Federal Agency for the Support and Evaluation of Graduate Education)
Ti and Ti alloys are widely used in restorative surgery because of their good biocompatibility, enhanced mechanical behavior and high corrosion resistance in physiological media. The corrosion resistance of Ti-based materials is due to the spontaneous formation of the TiO2 oxide film on their surface, which exhibits elevated stability in biological fluids. Ti-Nb alloys, depending on the composition and the processing routes to which the alloys are subjected, have high mechanical strength combined with low elastic modulus. The addition of Sn to Ti-Nb alloys allows the phase transformations to be controlled, particularly the precipitation of omega phase. The aim of this study is to discuss the microstructure, mechanical properties and corrosion behavior of cast Ti-Nb alloys to which Sn has been added. Samples were centrifugally cast in a copper mold, and the microstructure was characterized using optical microscopy, scanning electron microscopy and X-ray diffractometry. Mechanical behavior evaluation was performed using Berkovich nanoindentation, Vickers hardness and compression tests. The corrosion behavior was evaluated in Ringer's solution at room temperature using electrochemical techniques. The results obtained suggested that the physical, mechanical and chemical behaviors of the Ti-Nb-Sn alloys are directly dependent on the Sn content. (C) 2014 Elsevier Inc. All rights reserved.
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