Abstract
Dealloying is known to be a powerful method to produce porous materials mainly with noble metals because the mechanism involves the selective dissolution of specific element(s) through corrosion in acid/alkali aqueous solutions. Recently, an alternative dealloying method has been developed using a metallic melt in place of the corrosive aqueous solution. In this study, using the novel dealloying method using a metallic melt, a toxic element, Ni, was successfully removed from the surface of NiTi, which has been used for biomedical metals, for improving their biocompatibility. Although the toxic ion release per unit surface area decreased, the total amount from the treated sample did not decrease effectively because of the substantial surface area developed using the dealloying method. The dealloying method followed by the oxidation treatment was found to decrease the ion release. By optimizing the dealloying conditions to suppress surface area development, drastic improvement in the biocompatibility of these Ti alloys is expected.
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Hirohashi, M., Ueda, K., Wada, T., Narushima, T., Kato, H. (2015). Surface Improvement for Biocompatibility of Biomedical Ti Alloy by Dealloying in Metallic Melt. In: Niinomi, M., Narushima, T., Nakai, M. (eds) Advances in Metallic Biomaterials. Springer Series in Biomaterials Science and Engineering, vol 4. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-46842-5_8
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DOI: https://doi.org/10.1007/978-3-662-46842-5_8
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