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<p>The process of preparing Ti6Al4V via a multistage deep reduction method was systematically investigated. The process, which encompasses magnesiothermic self-propagation and deep reduction, was studied using X-ray diraction, scaning electon microscope–energy dispersivespectroscopy, a laser particle size analyser, inductively coupled plasma spectiometere, and an oxygen–nitrogen–hydrogen analyser. The magnesiothermic self-propagation process revealed that the TiO<sub>2</sub>–V<sub>2</sub>O<sub>5</sub>–Al–Mg system starts at a reaction temperature of 908&#xa0;K. The reaction was initiated by a solid–solid interaction with a reaction order of <i>n</i> = 0.043 and an apparent activation energy of <i>E</i> = 1159.34&#xa0;kJ/mol. The use of monomeric Al as an aluminium source in the magnesiothermic self-propagation process, along with briquetting of the feedstock and reaction in an Ar atmosphere at 0.6&#xa0;MPa using local ignition, can yield porous-like precursors with an O content of 15.6 wt.% and a Mg content of 2.80 wt.%. The results of the deep reduction process indicated that the particle size of the precursor affects the O content of the Ti6Al4V alloy powder product. After holding the precursor at 1173&#xa0;K for 3.5&#xa0;h, the O content decreased to 0.253 wt.% and the Mg content to 0.01 wt.%. Coral-like Ti6Al4V alloy powders with a specific surface area of 0.45 m<sup>2</sup>/g were thus obtained. </p>

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Process and reaction mechanism analysis of Ti6Al4V alloy powder preparation by multistage deep reduction method

  • 期刊论文

  • 发表日期：

    2026年7月29日

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  • Ji-Sen Yan,
  • Ming-Hui Wang,
  • Zhi-He Dou,
  • Ting-An Zhang,
  • Fang Xie

摘要

The process of preparing Ti6Al4V via a multistage deep reduction method was systematically investigated. The process, which encompasses magnesiothermic self-propagation and deep reduction, was studied using X-ray diraction, scaning electon microscope–energy dispersivespectroscopy, a laser particle size analyser, inductively coupled plasma spectiometere, and an oxygen–nitrogen–hydrogen analyser. The magnesiothermic self-propagation process revealed that the TiO2–V2O5–Al–Mg system starts at a reaction temperature of 908 K. The reaction was initiated by a solid–solid interaction with a reaction order of n = 0.043 and an apparent activation energy of E = 1159.34 kJ/mol. The use of monomeric Al as an aluminium source in the magnesiothermic self-propagation process, along with briquetting of the feedstock and reaction in an Ar atmosphere at 0.6 MPa using local ignition, can yield porous-like precursors with an O content of 15.6 wt.% and a Mg content of 2.80 wt.%. The results of the deep reduction process indicated that the particle size of the precursor affects the O content of the Ti6Al4V alloy powder product. After holding the precursor at 1173 K for 3.5 h, the O content decreased to 0.253 wt.% and the Mg content to 0.01 wt.%. Coral-like Ti6Al4V alloy powders with a specific surface area of 0.45 m2/g were thus obtained.