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Microstructural, mechanical and biological characterizations of the promising titanium-tantalum alloy for biomedical applications
Journal of Alloys and Compounds ( IF 4.650 ) Pub Date : 2017-12-02 , DOI: 10.1016/j.jallcom.2017.11.392
Chi-Ming Wu,Pei-Wen Peng,Hsin-Hua Chou,Keng-Liang Ou,Erwan Sugiatno,Chung-Ming Liu,Chiung-Fang Huang

In this study, the microstructural, mechanical and biological characterizations of the Ti-25Ta (wt.%) alloy were investigated by means of optical microscope, X-ray diffraction, electron microscope, microhardness test, contact angle goniometer and in vitro cytotoxicity assay. As the alloy underwent heat-treatment at temperatures between 700 °C and 1000 °C for 30 min, its microstructure was a mixture of β phase and needle-like α′′ martensite phase. The analytical results indicated that the volume fraction of the needle-like α′′ martensite phase decreased with increasing heat-treatment temperature. The β transus temperature of the investigated Ti-25Ta alloy was below 700 °C. Moreover, the alloy heat-treated at 900 °C exhibited the maximum hardness Hv 743 ± 12.93. For wettability evaluation, all investigated samples possessed surface hydrophilicity. The cytotoxicity assay results also demonstrated that the heat-treated Ti-25Ta samples have well cell proliferation and adhesion behaviors. Therefore, these results and features could be used to further understand the relationship between the high temperature microstructure, mechanical behavior and in vivo biocompatibility of the Ti-25Ta alloy, and develop as a potential biomedical alloy.



中文翻译:

有望用于生物医学的钛-钽合金的微观结构,力学和生物学特性

在这项研究中,通过光学显微镜,X射线衍射,电子显微镜,显微硬度测试,接触角测角仪和体外方法研究了Ti-25Ta(wt。%)合金的组织,力学和生物学特性。细胞毒性测定。由于该合金在700°C至1000°C的温度下进行了30分钟的热处理,其微观结构为β相和针状α''马氏体相的混合物。分析结果表明,随着热处理温度的升高,针状α''马氏体相的体积分数减小。研究的Ti-25Ta合金的β转变温度低于700°C。而且,在900℃下热处理的合金表现出最大硬度Hv 743±12.93。为了评估润湿性,所有研究的样品均具有表面亲水性。细胞毒性测定结果还表明,经热处理的Ti-25Ta样品具有良好的细胞增殖和粘附行为。所以,Ti-25Ta合金的体内生物相容性,并发展成为潜在的生物医学合金。

更新日期:2017-12-02
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