期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 24, 期 1, 页码 136-142出版社
SPRINGER
DOI: 10.1007/s11665-014-1299-7
关键词
biomedical alloy; bone implant; modulus; pore structure; porous titanium alloy; recoverable strain
资金
- Guangdong Provincial Science and Technology Projects [2012B010200020]
- New Century Excellent Talents in University [NCET-12-0201]
- Fundamental Research Funds for the Central Universities [2014ZG0026]
- Guangdong Natural Science Funds [S2013010012487]
Recently, porous Ti-Nb-based shape memory alloys have been considered as promising implants for biomedical application, because of their non-toxic elements, low elastic modulus, and stable superelasticity. However, the inverse relationship between pore characteristics and superelasticity of porous SMAs will strongly affect their clinical application. Until now, there have been few works specifically focusing on the effect of pore structure on the mechanical properties and superelasticity of porous Ti-Nb-based SMAs. In this study, the pore structure, including porosity and pore size, of porous Ti-22Nb-6Zr alloys was successfully regulated by adjusting the amount and size of space-holder particles. XRD and SEM investigation showed that all these porous alloys had homogeneous composition. Compression tests indicated that porosity played an important role in the mechanical properties and superelasticity of these porous alloys. Those alloys with porosity in the range of 38.5%-49.7% exhibited mechanical properties approaching to cortical bones, with elastic modulus, compressive strength, and recoverable strain in the range of 7.2-11.4 GPa, 188-422 MPa, and 2.4%-2.6%, respectively. Under the same porosity, the alloys with larger pores exhibited lower elastic modulus, while the alloys with smaller pores presented higher compressive strength.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据