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<p>Carbon fiber-reinforced carbon and SiC dual matrices composites (C/C–SiC) exhibit excellent properties, including high specific strength, superior wear resistance, and exceptional high-temperature stability, making them highly suitable for high-speed and heavy-duty applications. In this study, the microstructure and tribological behavior of 2.5D woven carbon fiber-reinforced C/C–SiC composites were systematically investigated using a full-scale test rig under 600&#xa0;km/h sliding conditions. The results demonstrate that the composite maintains a stable friction coefficient of approximately 0.08–0.12, with excellent wear resistance due to its enhanced fiber architecture. Microstructural characterization indicates that the initial wear phase is predominantly governed by mild abrasion and adhesion mechanisms. With progressive escalation of frictional loading, both abrasive and adhesive wear effects intensify significantly, while fatigue-induced material degradation and oxidative wear mechanisms concurrently develop. It is noteworthy that the 2.5D fiber-reinforced structure effectively mitigates severe delamination, significantly enhancing the material durability under extreme sliding conditions.</p> Graphical abstract <p></p>

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Tribological performance of 2.5D Cf-reinforced ceramic matrix composites for maglev train sled applications at ultra-high speeds

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Peng Liu,
  • Minge Yuan,
  • Yaqing Duan,
  • Zhuan Li,
  • Yuqing Yuan,
  • Peng Xiao,
  • Houli Sun,
  • Yue Jing,
  • Yang Li

摘要

Carbon fiber-reinforced carbon and SiC dual matrices composites (C/C–SiC) exhibit excellent properties, including high specific strength, superior wear resistance, and exceptional high-temperature stability, making them highly suitable for high-speed and heavy-duty applications. In this study, the microstructure and tribological behavior of 2.5D woven carbon fiber-reinforced C/C–SiC composites were systematically investigated using a full-scale test rig under 600 km/h sliding conditions. The results demonstrate that the composite maintains a stable friction coefficient of approximately 0.08–0.12, with excellent wear resistance due to its enhanced fiber architecture. Microstructural characterization indicates that the initial wear phase is predominantly governed by mild abrasion and adhesion mechanisms. With progressive escalation of frictional loading, both abrasive and adhesive wear effects intensify significantly, while fatigue-induced material degradation and oxidative wear mechanisms concurrently develop. It is noteworthy that the 2.5D fiber-reinforced structure effectively mitigates severe delamination, significantly enhancing the material durability under extreme sliding conditions.

Graphical abstract