Influence of Laser Nitriding on the Surface and Corrosion Properties of Ti-20Nb-13Zr Alloy in Artificial Saliva for Dental Applications
Journal of Materials Engineering and Performance, ISSN: 1544-1024, Vol: 27, Issue: 9, Page: 4655-4664
2018
- 35Citations
- 30Captures
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Article Description
Ti alloys have been used for dentistry due to their lower density and improved compatibility. However, the resistance to corrosion and surface hardness of Ti alloys need to be improved to avoid the formation of debris, which affects the long-term biocompatibility. In the present work, the surface characteristics and corrosion protection in artificial saliva produced by laser nitriding of a new biomedical Ti-20Nb-13Zr at.% alloy have been investigated for dental applications. The laser nitrided and untreated alloy surfaces were examined using XRD, FE-SEM, x-ray photon spectroscopy, Vickers microhardness measurements, atomic force microscopy, scratch measurements, Raman spectroscopy, and surface energy measurements. The susceptibility of the laser nitrided TNZ alloy to corrosion in an artificial saliva medium was investigated by electrochemical corrosion tests, which were performed by utilizing open circuit potential monitoring, electrochemical frequency modulation, and electrochemical impedance spectroscopic methods. The findings revealed that a TiN layer formed on the alloy surface after nitriding. The surface hardness of the treated alloy was 2.4 times that of the as-received samples. Moreover, the results showed improved friction coefficient and hydrophilic surface characteristics. The corrosion analysis revealed that the compact and dense TiN layer produced during laser nitriding improved the corrosion resistance of the Ti-20Nb-13Zr sample in artificial saliva medium.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85052495969&origin=inward; http://dx.doi.org/10.1007/s11665-018-3569-2; http://link.springer.com/10.1007/s11665-018-3569-2; http://link.springer.com/content/pdf/10.1007/s11665-018-3569-2.pdf; http://link.springer.com/article/10.1007/s11665-018-3569-2/fulltext.html; https://dx.doi.org/10.1007/s11665-018-3569-2; https://link.springer.com/article/10.1007/s11665-018-3569-2
Springer Science and Business Media LLC
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