Journal
MATERIALS
Volume 8, Issue 9, Pages 5986-6003Publisher
MDPI
DOI: 10.3390/ma8095287
Keywords
Ti-xNb alloys; microstructure; mechanical properties; cytotoxicity; dental material
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Funding
- Basic Science Research Program through National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2011-0002706]
- National Research Foundation of Korea (NRF) grant - Korea Government (MSIP) [2011-0030121]
- National Research Foundation of Korea [2011-0030121] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this paper, the effects of Nb addition (5-20 wt %) on the microstructure, mechanical properties, corrosion behavior, and cytotoxicity of Ti-Nb alloys were investigated with the aim of understanding the relationship between phase/microstructure and various properties of Ti-xNb alloys. Phase/microstructure was analyzed using X-ray diffraction (XRD), SEM, and TEM. The results indicated that the Ti-xNb alloys (x = 10, 15, and 20 wt %) were mainly composed of + phases with precipitation of the isothermal phase. The volume percentage of the phase increased with increasing Nb content. We also investigated the effects of the alloying element Nb on the mechanical properties (including Vickers hardness and elastic modulus), oxidation protection ability, and corrosion behavior of Ti-xNb binary alloys. The mechanical properties and corrosion behavior of Ti-xNb alloys were found to be sensitive to Nb content. These experimental results indicated that the addition of Nb contributed to the hardening of cp-Ti and to the improvement of its oxidation resistance. Electrochemical experiments showed that the Ti-xNb alloys exhibited superior corrosion resistance to that of cp-Ti. The cytotoxicities of the Ti-xNb alloys were similar to that of pure titanium.
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