A novel Nb–TiNb nanocomposite with single-phase BCC structure for bio-implant applications

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2024-07-17 DOI:10.1007/s12598-024-02884-6

Guang-Lei Liu, Wei Wang, Wen Ma, Shun Guo, Bao-Guo Shen, Hai-Xia Liu

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Abstract

In the present study, a body-centered-cubic (BCC) structured Nb/TiNb multilayer nanocomposite with high yield strength, which comprises a soft TiNb matrix and reinforced Nb nanowires, was designed and fabricated with the aim of elucidating the strengthening mechanism of Nb/TiNb multilayer nanocomposite by scanning electron microscope, transmission electron microscopy and in situ synchrotron X-ray diffraction. It is observed that the Nb/TiNb nanocomposite possesses a high yield strength of ~ 640 MPa, significantly exceeding that of the conventional single-phase β-type Ti alloys. Further experimental results indicate that as plastic deformation commenced in the TiNb matrix of Nb/TiNb nanocomposite, load transfer from the soft TiNb matrix into the reinforced Nb nanowires occurred, allowing for a high load-bearing stress contribution and a significant strength enhancement of Nb/TiNb nanocomposite. Meanwhile, the embedded Nb nanowires can effectively impede the propagation of dislocation in TiNb matrix, further strengthening the present nanocomposite. These findings elucidate the strengthening mechanism of Nb/TiNb nanocomposite through the above two combinations, providing a basis for the design and development of the high-strength composites with a single-phase BCC structure for biomedical applications.

Graphical abstract

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具有单相 BCC 结构的新型 Nb-TiNb 纳米复合材料在生物植入物中的应用

本研究设计并制备了具有高屈服强度的体心立方（BCC）结构 Nb/TiNb 多层纳米复合材料，它由软 TiNb 基体和增强 Nb 纳米线组成，旨在通过扫描电子显微镜、透射电子显微镜和原位同步辐射 X 射线衍射阐明 Nb/TiNb 多层纳米复合材料的增强机理。结果表明，Nb/TiNb 纳米复合材料的屈服强度高达约 640 兆帕，大大超过了传统的单相 β 型 Ti 合金。进一步的实验结果表明，当 Nb/TiNb 纳米复合材料的 TiNb 基体开始发生塑性变形时，载荷从柔软的 TiNb 基体转移到增强的 Nb 纳米线上，从而使 Nb/TiNb 纳米复合材料具有较高的承载应力贡献并显著提高了强度。同时，嵌入的铌纳米线能有效阻碍钛铌基体中位错的传播，进一步增强了目前的纳米复合材料。这些发现通过上述两种组合阐明了 Nb/TiNb 纳米复合材料的增强机理，为设计和开发生物医学应用领域的单相 BCC 结构高强度复合材料提供了依据。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.