Sintering Performance and Corrosion behavior of biomedical Ti-24Nb-4Zr-8Sn alloy produced using SPS in various simulated body solutions.
Madonsela, J. Matizamhuka, W. Machaka, R. Shongwe, B. Yamamoto, A.
Madonsela, J.
Matizamhuka, W.
Machaka, R.
Shongwe, B.
Yamamoto, A.
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Abstract
In this study, the Ti-24Nb-4Zr-8Sn (Ti2448) alloy was produced using spark plasma sintering technique and its behaviour in 0.9% NaCl, Hank's solution and cell culture medium were investigated using open circuit potential and potentiodynamic polarization techniques. The results were compared with that of CP Ti and Ti-6Al-4V alloy. Relative densities above 99.0% were achieved for all three systems. CP Ti and Ti64 had both 100% relative density, and Ti2448 showed a slightly lower density of 99.8%. Corrosion results showed that all three materials exhibited good corrosion resistance due to the formation of a protective passive film. In 0.9% NaCl Ti2448 had the highest current density (9.05 nA/cm2), implying that its corrosion resistance is relatively poor in comparison to Ti (6.41 nA/cm2) and Ti64 (5.43 nA/cm2), respectively. The same behaviour was observed in Hank's solution. In cell culture medium, Ti2448 showed better corrosion resistance with the lowest current density of 2.96 nA/cm2 compared to 4.86 nA/cm2 and 5.62 nA/cm2 of Ti and Ti64 respectively. However, the current densities observed are quite low and insignificant that they lie within acceptable ranges for Ti2448 to be qualified as a biomaterial.
Description
Conference of the South African Advanced Materials Initiative (CoSAAMI-2018).
Date
2018-01-01
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Publisher
IOP Publishing
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Keywords
Ti-24Nb-4Zr-8Sn (Ti2448), Sintering Performance, Corrosion behavior