| Summary: | 博士 === 國立中山大學 === 材料與光電科學學系研究所 === 106 === Ideal bio-implant biomaterials should possess good biocompatibility, high corrosion resistance and low Young’s modulus simultaneously. Materials with low Young’s modulus can prevent shielding effect taking place. Generally, Ti and Ti alloys exhibit not only high corrosion resistance but good biocompatibility as well. Many researches focus on Ti and Ti-alloys potential for bio-implant applications. Via adding Ta and Nb, beta stable elements, the Young’s modulus of Ti-alloys can decrease close to nature bone. Besides, Ta and Nb are considered as bio-friendly elements which exhibit no cytotoxicity. In this study, compared with other Ti-Ta-Nb alloys, Ti-30Ta-10Nb owns lower Young’s modulus but lower corrosion resistance. Nevertheless, no obvious pitting reaction occurs under the potential of 2 V. Also, according to Gibson and Ashby equation, the Young’s modulus of Ti-30Ta-Nb alloys with porosity about 60% can as low as nature bones and the strength of Ti-30Ta-Nb alloys can be higher than nature bone. Consequently, Ti-30Ta-Nb alloys demonstrate high potential for bio-implant applications.
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