Yu Hsing-Ning, Hsu Hsueh-Chuan, Wu Shih-Ching, Hsu Shih-Kuang, Ho Wen-Fu
Department of Surgery, Division of Orthopaedics, Zuoying Branch of Kaohsiung Armed Forces General Hospital, Kaohsiung 81342, Taiwan.
Department of Dental Technology and Materials Science, Central Taiwan University of Science and Technology, Taichung 40601, Taiwan.
Materials (Basel). 2017 Apr 27;10(5):458. doi: 10.3390/ma10050458.
Ti-5Sn-Mo ( = 0, 1, 3, 5, 7.5, 10, 12.5, 15, 17.5, and 20 wt %) alloys were designed and prepared for application as implant materials with superior mechanical properties. The results demonstrated that the crystal structure and mechanical properties of Ti-5Sn-Mo alloys are highly affected by their Mo content. The as-cast microstructures of Ti-5Sn-Mo alloys transformed in the sequence of phases α' → α″ → β, and the morphologies of the alloys changed from a lath structure to an equiaxed structure as the Mo content increased. The α″-phase Ti-5Sn-7.5Mo (80 GPa) and β-phase Ti-5Sn-10Mo (85 GPa) exhibited relatively low elastic moduli and had excellent elastic recovery angles of 27.4° and 37.8°, respectively. Furthermore, they exhibited high ductility and moderate strength, as evaluated using the three-point bending test. Search for a more suitable implant material by this study, Ti-5Sn-Mo alloys with 7.5 and 10 wt % Mo appear to be promising candidates because they demonstrate the optimal combined properties of microhardness, ductility, elastic modulus, and elastic recovery capability.
设计并制备了Ti-5Sn-Mo（钼含量分别为0、1、3、5、7.5、10、12.5、15、17.5和20 wt%）合金，用作具有优异力学性能的植入材料。结果表明，Ti-5Sn-Mo合金的晶体结构和力学性能受其钼含量的影响很大。Ti-5Sn-Mo合金的铸态微观结构按α'→α″→β相的顺序转变，随着钼含量的增加，合金的形态从板条结构转变为等轴结构。α″相的Ti-5Sn-7.5Mo（弹性模量80 GPa）和β相的Ti-5Sn-10Mo（弹性模量85 GPa）表现出相对较低的弹性模量，弹性回复角分别为27.4°和37.8°，非常优异。此外，通过三点弯曲试验评估，它们表现出高延展性和中等强度。通过本研究寻找更合适的植入材料，含7.5 wt%和10 wt%钼的Ti-5Sn-Mo合金似乎是很有前景的候选材料，因为它们展现出了显微硬度、延展性、弹性模量和弹性回复能力的最佳综合性能。
