Journal
APPLIED SURFACE SCIENCE
Volume 432, Issue -, Pages 278-284Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.08.023
Keywords
Ti-29Nb-xHf alloys; Plasma electrolytic oxidation; Magnetron sputtering; Mn coatings; Corrosion
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Funding
- National Research Foundation of Korea (NRF) [2015H1C1A1035241, 2008-0062283]
- National Research Foundation of Korea [2015H1C1A1035241, 2008-0062283] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, Mn-coatings on the micro-pore formed Ti-29Nb-xHf alloys by RF-magnetrons sputtering for dental applications were studied using different experimental techniques. Mn coating films were formed on Ti-29Nb-xHf alloys by a radio frequency magnetron sputtering technique for 0, 1, 3, and 5 min at 45 W. The microstructure, composition, and phase structure of the coated alloys were examined by optical microscopy, field emission scanning electron microscopy, X-ray diffraction, and energy-dispersive X-ray spectroscopy. The microstructure of Ti-29Nb alloy showed alpha phase in the needle-like structure and Ti-29Nb-15Hf alloy showed beta phase in the equiaxed structure. As the sputtering time increased, the circular particles of Mn coatings on the Ti-29Nb alloy increased at inside and outside surfaces. As the sputtering time increased, [Mn + Ca/P] ratio of the plasma electrolytic oxidized films in Ti-29Nb-xHf alloys increased. The corrosion potential (Ecorr) of Mn coatings on the Ti-29Nb alloy showed higher than that of Mn coatings on the Ti-29Nb-15Hf alloy. The passive current density (I-pass) of the Mn coating on the Ti-29Nb alloy and Mn coatings on the Ti-29Nb-15Hf alloy was less noble than the non-Mn coated Ti-29Nb and Ti-29Nb-15Hf alloys surface. (C) 2017 Elsevier B.V. All rights reserved.
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