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Improved mechanical and wear properties of Ti−35Nb−5Ta−7Zr−xSi alloys fabricated by selective electron beam melting for biomedical application

粉床电子束增材制造生物医用Ti−35Nb−5Ta−7Zr−xSi合金的性能研究

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Abstract

As the next generation biomedical titanium alloy, β-type titanium alloys are excellent candidates for biomedical applications due to the relative low elastic modulus and the contained non-toxic elements. However, the relative low strength and unsatisfactory tribological property are undesired for load-bearing implant applications. In this study, 0–5 at% Si was added to the classic Ti−35Nb−5Ta−7Zr alloy to improve its strength and wear resistance, and the (Ti−35Nb−5Ta−7Zr)1−x−Six (x=0, 1 at% and 5 at%) alloy were fabricated by selective electron beam melting (SEBM) technology. The results indicated that Si addition significantly increases in compressive yield strength, which is mainly due to grain refinement strengthening. At the same time, the wear rate of the as-built TNTZ-5Si alloy in SBF solution was only ∼30% of the Ti−6Al−4V alloy. Consequently, the TNTZ-5Si alloy showed an excellent combination of compressive yield strength, elastic modulus and wear resistance for potential load-bearing implant applications.

摘要

由不含毒性的合金元素组成的β钛合金具有低模量和优异的生物相容性，被认为是具有广泛应用前景的下一代生物医用材料。但强度和耐磨性的不足，限制了医用β 钛合金在骨科临床上的应用。 因此，本文在经典的β 钛合金Ti−35Nb−5Ta−7Zr 基础上，通过0∼5 at%的硅元素添加，同时为了迎合临床医学对骨科植入材料定制化的发展趋势，采用粉床电子束增材制造技术进行高强、耐磨医用β 钛合金的制备，并研究了硅元素的添加对合金微观组织、力学性能和摩擦磨损性能的影响规律。结果表明，硅的添加显著细化了合金的晶粒，大幅度提高了合金的强度，并且保持了相对较低的弹性模量。 5 at%Si合金表现出了最优异的强度、弹性模量和耐磨性，有望作为临床应用的下一代骨科植入材料。

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Authors and Affiliations

  1. College of Materials Science and Engineering, Jilin University, Changchun, 130025, China

    Kun Yang  (杨坤)

  2. State Key Laboratory of Porous Metal Materials (Northwest Institute for Nonferrous Metal Research), Xi’an, 710016, China

    Kun Yang  (杨坤), Jian Wang  (王建), Guang-yu Yang  (杨广宇) & Liang Jia  (贾亮)

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  1. Kun Yang  (杨坤)
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  2. Jian Wang  (王建)
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Correspondence to Kun Yang  (杨坤).

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Foundation item

Project(2019zdzx-04-03) supported by the Science & Technology Specific Projects of Shaanxi Province, China; Project (2021KJXX-75) supported by the Innovation Capability Support Plan of Shaanxi Province, China

Contributors

YANG Kun provided the concept and edited the draft of manuscript. WANG Jian and YANG Guang-yu analyzed the measured data. All authors edited the draft of manuscript and replied to reviewers’ comments and revised the final version.

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The authors declare that they have no known competing financial interests or personal relationships to influence the work reported in this paper.

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Yang, K., Wang, J., Yang, Gy. et al. Improved mechanical and wear properties of Ti−35Nb−5Ta−7Zr−xSi alloys fabricated by selective electron beam melting for biomedical application. J. Cent. South Univ. 29, 3825–3835 (2022). https://doi.org/10.1007/s11771-022-5203-6

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