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<p>This study investigates the effect of artificial pinning centres using oxide dispersion strengthening (ODS) approach on the superconducting properties of the additively manufactured Nb47wt%Ti superconductor. Y<sub>2</sub>O<sub>3</sub> nanoparticles are incorporated within the <i>in situ</i> alloyed Nb47wt%Ti powder and processed through laser powder bed fusion process. Laser parameters were optimised, and the optimal condition shows a microstructural density of 6.24&#xa0;g/cm<sup>3</sup>, 0.35% porosity fraction, and 0.21% undissolved Nb fraction. The sample was heat treated for homogenisation and aged to precipitate <i>⍺</i>-Ti pinning centres. Evidence from XRD peak shifts and literature comparison suggests the formation of Y<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> artificial pinning centres, arising from the interaction of <i>⍺</i>-Ti with Y<sub>2</sub>O<sub>3</sub>. The superconducting optimum condition shows a critical temperature of 8.4&#xa0;K and a critical current density value of 2.51 kA/mm<sup>2</sup> (at 4.2&#xa0;K and 5&#xa0;T).</p>

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Tailored superconducting properties of laser powder bed fusion NbTi by nanosized artificial pinning centres

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月7日

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  • Tugrul Talha Ersoz,
  • Abd El-Moez A Mohamed,
  • Minki Jeong,
  • Moataz M. Attallah

摘要

This study investigates the effect of artificial pinning centres using oxide dispersion strengthening (ODS) approach on the superconducting properties of the additively manufactured Nb47wt%Ti superconductor. Y2O3 nanoparticles are incorporated within the in situ alloyed Nb47wt%Ti powder and processed through laser powder bed fusion process. Laser parameters were optimised, and the optimal condition shows a microstructural density of 6.24 g/cm3, 0.35% porosity fraction, and 0.21% undissolved Nb fraction. The sample was heat treated for homogenisation and aged to precipitate ⍺-Ti pinning centres. Evidence from XRD peak shifts and literature comparison suggests the formation of Y2Ti2O7 artificial pinning centres, arising from the interaction of ⍺-Ti with Y2O3. The superconducting optimum condition shows a critical temperature of 8.4 K and a critical current density value of 2.51 kA/mm2 (at 4.2 K and 5 T).