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Abstract <p>Experimental studies involving multiple (~10<sup>4</sup> cycles) exposures of ELM-like pulses revealed key erosion patterns in AlN–TiB<sub>2</sub> composite ceramics. The primary degradation mechanism was found to be damage to the aluminum-containing phase, while significant erosion of refractory TiB<sub>2</sub> occurred only after substantial removal of the low-melting-point component consisting of free aluminum and aluminum nitride. Although the aluminum-containing phase demonstrates relatively low thermal shock resistance, it plays a crucial role by filling pores and enhancing both thermal conductivity and mechanical strength of the material. For practical implementation of TiB<sub>2</sub>-based materials, two key challenges must be addressed: optimization of additive materials and refinement of manufacturing processes to reduce material porosity. The use of aluminum-containing materials in plasma-facing components of deuterium–tritium fusion devices may lead to accumulation of the long-lived radioactive <sup>26</sup>Al isotope. Nevertheless, the results obtained demonstrate the potential of composite materials combining refractory and low-melting-point constituents.</p>

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Testing of AlN–TiB2 Ceramics by Pulsed-Periodic Thermal Load Possible in Fusion Devices

  • 期刊论文

  • 发表日期：

    2026年8月2日

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  • D. E. Cherepanov,
  • A. V. Burdakov,
  • L. N. Vyacheslavov,
  • M. A. Golosov,
  • A. A. Kasatov,
  • G. G. Lazareva,
  • V. E. Loryan,
  • V. A. Popov,
  • G. A. Ryzhkov

摘要

Abstract

Experimental studies involving multiple (~104 cycles) exposures of ELM-like pulses revealed key erosion patterns in AlN–TiB2 composite ceramics. The primary degradation mechanism was found to be damage to the aluminum-containing phase, while significant erosion of refractory TiB2 occurred only after substantial removal of the low-melting-point component consisting of free aluminum and aluminum nitride. Although the aluminum-containing phase demonstrates relatively low thermal shock resistance, it plays a crucial role by filling pores and enhancing both thermal conductivity and mechanical strength of the material. For practical implementation of TiB2-based materials, two key challenges must be addressed: optimization of additive materials and refinement of manufacturing processes to reduce material porosity. The use of aluminum-containing materials in plasma-facing components of deuterium–tritium fusion devices may lead to accumulation of the long-lived radioactive 26Al isotope. Nevertheless, the results obtained demonstrate the potential of composite materials combining refractory and low-melting-point constituents.