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Abstract <p>We conducted a thermodynamic analysis of the structural formation of class I and II bi-mesocomposites in cemented carbides composed of mesoelements and a matrix. We derived expressions describing the change in Helmholtz free energy during solid-phase and liquid-phase sintering of these bi-mesocomposites. The results show that forming stable bi-mesostructures in cemented carbides requires solid-phase sintering for class I mesostructures, whereas producing class II bi-mesocomposites by liquid-phase sintering requires effective wetting of the mesoelements. Using this approach, we obtained a WC–20 wt % Co–2 wt % C bi-mesostructure through liquid-phase sintering.</p>

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Thermodynamics of the Formation of Bi-Mesostructures in Composite Materials

  • 期刊论文

  • 发表日期：

    2025年10月20日

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  • A. F. Lisovsky,
  • O. O. Matviichuk,
  • S. A. Davydenko

摘要

Abstract

We conducted a thermodynamic analysis of the structural formation of class I and II bi-mesocomposites in cemented carbides composed of mesoelements and a matrix. We derived expressions describing the change in Helmholtz free energy during solid-phase and liquid-phase sintering of these bi-mesocomposites. The results show that forming stable bi-mesostructures in cemented carbides requires solid-phase sintering for class I mesostructures, whereas producing class II bi-mesocomposites by liquid-phase sintering requires effective wetting of the mesoelements. Using this approach, we obtained a WC–20 wt % Co–2 wt % C bi-mesostructure through liquid-phase sintering.