Effects of TiB on the mechanical properties of Ti–29Nb–13Ta–4.6Zr alloy for use in biomedical applications
Effects of TiB on the mechanical properties of Ti–29Nb–13Ta–4.6Zr alloy for use in biomedical applications
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DOI：
10.1016/j.msea.2011.03.108
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发表时间：
2011-06
期刊：
影响因子：
6.4
通讯作者：
Xiu Song;M. Niinomi;H. Tsutsumi;M. Nakai;Lei Wang
中科院分区：
文献类型：
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作者：
Xiu Song;M. Niinomi;H. Tsutsumi;M. Nakai;Lei Wang
为了提高β-29Nb-13Ta-4.6Zr合金的力学性能，降低其杨氏模量，在TNTZ中加入TiB2，研究了质量分数为0.05~0.50%B的TiB2合金的显微组织和力学性能。通过改变TiB_2的加入量来控制TNTZ的B浓度。质量分数为0.05~0.50wt%B的TNTZ由β相和少量TiB组成。随着B浓度的增加，这些TiB析出物在阻止织构移动方面变得越来越有效。TiB细化了TNTZ的组织，且随着B含量的增加，TNTZ的晶粒度减小。此外，质量分数为0.05-0.50的TNTZ的杨氏模数仍保持在70 GPA以下，与不含TiB的TNTZ的杨氏模数基本相同。质量分数为0.05~0.50wt%B的TNTZ的抗拉强度略有提高，最佳抗拉强度提高约8%。质量分数为0.10%B的TNTZ具有良好的抗拉强度和延伸率之间的平衡。这项研究的结果有望有助于创造一种具有更好的机械性能和保持杨氏模数的TNTZ基材料，可以用作牙科和矫形生物材料。
TiB2was added to β-type Ti–29Nb–13Ta–4.6Zr (TNTZ) to enhance its mechanical properties and lower its Young's modulus, and the microstructures and mechanical properties of TNTZ with 0.05–0.50 mass%B were investigated. The B concentration of TNTZ was controlled by varying the amount of added TiB2. TNTZ with 0.05–0.50 mass%B consists of a β-phase with a small amount of TiB. As the B concentration increases, these TiB precipitates become increasingly efficient at preventing texture movement. The microstructure of TNTZ is refined by TiB, and the TNTZ grain size decreases as the B concentration increases. Moreover, the Young's moduli of TNTZ with 0.05–0.50 mass%B remain below 70 GPa, and are almost similar to that of TNTZ without TiB. The tensile strength of TNTZ with 0.05–0.50 mass%B is slightly improved, and the optimum tensile strength is enhanced by approximately 8%. TNTZ with 0.10 mass%B exhibits a good balance between tensile strength and the elongation. The results of this study are expected to contribute to the creation of a TNTZ-based material with improved mechanical properties and maintained Young's modulus that can be used as dental and orthopedic biomaterials.