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Abstract <p>Porous Ti–Al–Si intermetallic compounds are synthesized by thermal explosion (TE) in a combustion synthesis process. We verify that the addition of elemental Si helps to slow down the degree of TE reaction in the Ti–Al system, which lowers the initial combustion temperature. The addition of Si also prompts the reaction system to first undergo an eutectic reaction between liquid Al–Si and solid Ti particles to generate a small amount of Ti–Si compound. At this time, the remaining Si is dissolved in the compound phase to form Ti(Al, Si)<sub>3</sub> solid solution. Finally, we determine that the open porosities of Ti–Al and Ti–Al–Si are 61.8 and 61.3 pct, respectively.</p> Graphical Abstract <p></p>

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Reaction Process and Evolution Mechanism of Porous Ti–Al–Si Intermetallic Compounds Synthesized by Thermal Explosion

  • 期刊论文

  • 发表日期：

    2025年3月17日

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  • Xinyang Jiao,
  • Yu Zhang,
  • Qingli Wu,
  • Peizhong Feng

摘要

Abstract

Porous Ti–Al–Si intermetallic compounds are synthesized by thermal explosion (TE) in a combustion synthesis process. We verify that the addition of elemental Si helps to slow down the degree of TE reaction in the Ti–Al system, which lowers the initial combustion temperature. The addition of Si also prompts the reaction system to first undergo an eutectic reaction between liquid Al–Si and solid Ti particles to generate a small amount of Ti–Si compound. At this time, the remaining Si is dissolved in the compound phase to form Ti(Al, Si)3 solid solution. Finally, we determine that the open porosities of Ti–Al and Ti–Al–Si are 61.8 and 61.3 pct, respectively.

Graphical Abstract