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<p>Titanium alloys such as Ti64 and NiTi are common biomedical materials. However, concerns about the release of toxic ions (V, Al, Ni) have driven research into safer β-Ti alloys containing biocompatible elements such as Ta and Nb. These stabilize the <i>β</i>-Ti phase, reducing stiffness to better match bone stiffness and enabling shape-memory behavior. This study characterizes Ti–Ta–Nb alloys made via powder metallurgy. Powders (20–100&#xa0;µm) were mixed with 1% PVA, compacted at 400&#xa0;MPa, and sintered at 1260&#xa0;°C under argon atmosphere. Samples were then heat-treated at 920&#xa0;°C for 30&#xa0;min and quenched into brine solution to stabilize the martensitic <i>α</i>″-Ti phase for shape-memory effects. Microstructural and mechanical analyses (SEM, XRD, microhardness) confirmed the presence of increased martensite after treatment. The best properties were achieved with 12.5% Nb and 12.5% Ta, highlighting the alloy’s potential for advanced implants.</p> Graphical abstract <p></p>

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Effect of thermal treatment on Ti–Ta–Nb alloys fabricated by powder metallurgy

  • 期刊论文

  • 发表日期：

    2025年12月19日

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  • C. Fernandez Salvador,
  • A. M. Garcia-Carrillo,
  • A. S. González-Pedraza,
  • L. Olmos,
  • P. Garnica,
  • O. Jiménez,
  • B. Chako-Tchamabe

摘要

Titanium alloys such as Ti64 and NiTi are common biomedical materials. However, concerns about the release of toxic ions (V, Al, Ni) have driven research into safer β-Ti alloys containing biocompatible elements such as Ta and Nb. These stabilize the β-Ti phase, reducing stiffness to better match bone stiffness and enabling shape-memory behavior. This study characterizes Ti–Ta–Nb alloys made via powder metallurgy. Powders (20–100 µm) were mixed with 1% PVA, compacted at 400 MPa, and sintered at 1260 °C under argon atmosphere. Samples were then heat-treated at 920 °C for 30 min and quenched into brine solution to stabilize the martensitic α″-Ti phase for shape-memory effects. Microstructural and mechanical analyses (SEM, XRD, microhardness) confirmed the presence of increased martensite after treatment. The best properties were achieved with 12.5% Nb and 12.5% Ta, highlighting the alloy’s potential for advanced implants.

Graphical abstract