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<p>The paper studies the structure and phase composition of products obtained from the Ti-PET-Al system using the self-propagating high-temperature synthesis (SHS) in nitrogen atmosphere. SHS processes are characterized by highly intensive exothermal reactions, and the highest synthesis temperature reaches 2135°C. The synthesis products comprise two disordered solid solutions (Ti, Al)(C,&#xa0;N) and Al(Ti)N(C) in the amount of&#xa0;86 and 14 wt.%, respectively. These solid solutions are based on titanium carbide and aluminum nitride structures. Their crystal lattices are distorted by interstitial atoms of other system elements. The SHS products particles represent agglomerates comprising finer particles ranging in size from 0.3&#xa0;to 5 µm, while their average size is 0.713 µm. Based on the research findings, the paper proposes the mechanism for the product formation during the synthesis of a&#xa0;mixture of titanium, plastic waste and aluminum in nitrogen atmosphere.</p>

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PET- and Al-based secondary raw materials for the SHS production from Ti-Al-C-N system

  • 期刊论文

  • 发表日期：

    2026年1月22日

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  • A. E. Matveev,
  • N. S. Pichugin,
  • V. V. Promakhov,
  • V. R. Bakhmat

摘要

The paper studies the structure and phase composition of products obtained from the Ti-PET-Al system using the self-propagating high-temperature synthesis (SHS) in nitrogen atmosphere. SHS processes are characterized by highly intensive exothermal reactions, and the highest synthesis temperature reaches 2135°C. The synthesis products comprise two disordered solid solutions (Ti, Al)(C, N) and Al(Ti)N(C) in the amount of 86 and 14 wt.%, respectively. These solid solutions are based on titanium carbide and aluminum nitride structures. Their crystal lattices are distorted by interstitial atoms of other system elements. The SHS products particles represent agglomerates comprising finer particles ranging in size from 0.3 to 5 µm, while their average size is 0.713 µm. Based on the research findings, the paper proposes the mechanism for the product formation during the synthesis of a mixture of titanium, plastic waste and aluminum in nitrogen atmosphere.