开发Ti-Nb-Mo-Zr合金具有低模量和优良的可塑性,用于生物医学应用
Sen Yang1, Zhiyuan Jia1, Xueyan Song1
1State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China.
Materials (Basel, Switzerland)
|January 28, 2026
概括
添加可以提高β合金的稳定性,显著降低弹性模量,改善生物医学支架应用的可塑性. -25Nb-2Mo-12Zr合金显示出一个有前途的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 生物医学工程 生物医学工程
- 金工业是金工业的一个方面.
背景情况:
- 变态稳定的β-合金具有低弹性模量和高可塑性,非常适合生物医学支架.
- (Zr) 在优化β型合金性能方面的作用受到研究.
研究的目的:
- 研究含量对Ti-25Nb-2Mo合金的稳定性,微观结构,机械性能和变形机制的影响.
- 开发用于生物医学支架应用的先进合金.
主要方法:
- 基于d电子理论的Ti-25Nb-2Mo-xZr (x = 0,3,9,12重%) 合金的设计.
- 使用各种分析技术,对微观结构,机械性能和变形机制进行系统的研究.
- 弹性模量和拉伸可塑性的评估.
主要成果:
- 增加Zr含量显著提高了β相稳定性.
- 抑制高模量α'和omega相的形成,导致弹性模量降低.
- 变形机制从脱位滑转为马氏体重定向,应力诱导的马氏体转变 (SIMT) 和结合,增强塑性.
- Ti-25Nb-2Mo-12Zr合金实现了低弹性模量 (56.3 GPa) 和高延伸到故障 (48.2%).
结论:
- 添加对于为生物医学应用量身定制β合金至关重要.
- -25Nb-2Mo-12Zr合金显示出生物医学支架的巨大潜力,因为它具有低弹性模量和高可塑性的优越组合.
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