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http://dx.doi.org/10.3740/MRSK.2003.13.11.761

Effects of Nb Addition on Corrosion Resistance and Cytotoxicity Behavior of Ti Alloys  

Lee, Doh-Jae (Dept. of Materials Science and Engineering, Chonnam National University)
Lee, Kwang-Min (Dept. of Materials Science and Engineering, Chonnam National University)
Lee, Kyung-Ku (Dept. of Materials Science and Engineering, Chonnam National University)
Ryu, Chang-Nam (Dept. of Materials Science and Engineering, Chonnam National University)
Oh, Tae-Wook (Dept. of Materials Science and Engineering, Chonnam National University)
Kim, Soo-Hag (Dept. of Materials Science and Engineering, Chonnam National University)
Yoon, Tack-Lim (Dept. of Orthopedics Surgery, Chonnam National University)
Publication Information
Korean Journal of Materials Research / v.13, no.11, 2003 , pp. 761-768 More about this Journal
Abstract
The corrosion resistance and cytotoxicity behavior of Ti alloys were studied as a function of Nb contents(3wt.%Nb, 20wt.%Nb, 40wt.%Nb). Ti-Nb alloys were melted by vacuum arc furnace and then rolled to 50% reduction ratio after homogenized at 105$0^{\circ}C$ for 24hrs. The corrosion resistance of Ti-Nb alloys were investigated by potentiodynamic polarization test in the 0.9% NaCl and 5% HCI solution. Biocompatibility of Ti-Nb alloys was evaluated by cytotoxicity test. The results can be summarized as follows 1) The microstructure change from equiaxial to acicular and the increased $\beta$ phase in Ti-Nb alloys were obtained as the Nb content increased. 2) For the corrosion test in the solution of 0.9% NaCl and 5% HCI, the corrosion behavior of Ti-Nb alloys was similar to ASTM grade 2 CP Ti. 3) For the cytotoxicity test, Ti-Nb alloys showed excellent biocompatibility compared to ASTM grade 2 CP Ti, 316L STS and Co-Cr alloys.
Keywords
titanium; Ti-Nb; cytotoxicity; biocompatibility; corrosion resistance;
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