|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Advanced Biomaterials
||The design and development of low modulus Ti-Nb-Zr based alloy system for biomedical application
||Afrin Mehjabeen, Ma Qian, Dong Qiu, Wei Xu
|On-Site Speaker (Planned)
Titanium (Ti) and Zirconium (Zr) are the prime candidates among all the metallic materials being used in biomedical implant fabrication because of their excellent biocompatibility, favorable mechanical properties, and high corrosion resistance. In the design of new biomedical alloys, stress shielding plays a vital role and should be considered carefully. Stress shielding occurs due to the mismatch of Young’s modulus between bone and implant which may result in refracture of the bone. The d-electron theory is developed based on the DV-Xα molecular orbital calculation of electronic structures of atoms. It explains some potential relationships between phase stability and elastic modulus through two electronic parameters: bond order, and d orbital energy level. In particular, a Bo -Md map is introduced to design new Ti-based alloys by d-electron theory where Bo and Md are the compositional average of Bo and Md respectively. Another useful parameter in alloy design is the electron to atom ratio, e/a, although there is controversy about the effect of e/a on elastic properties. In this research, these two tools are used together to design promising Ti-Nb-Zr alloys in conjunction with the use of the basic principles of physical metallurgy.
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