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<p>Quartz fiber-reinforced quartz ceramic matrix composites (SiO<sub>2f</sub>/SiO<sub>2</sub> CMCs) show considerable promise for high-temperature wave-transparent applications. However, machining these materials often leads to typical fiber damage mechanisms such as edge collapse, fiber pull-out, and interphase debonding. To clarify how fiber orientation and scratch depth affect damage evolution, single abrasive scratching experiments were performed. An anisotropic three-phase cutting model was developed, incorporating the fiber, matrix, and interphase structure based on the actual yarn-matrix architecture. The simulated surface morphology shows strong agreement with experimental observations. Ultrasonic vibration is found to exert a dual influence on microcrack initiation and propagation: on one hand, high-frequency impacts transmitted through the quartz fibers enhance matrix crack growth and promote brittle spallation along fiber surfaces; on the other hand, it helps disperse strain zones and alleviates local stress concentration, thereby delaying crack initiation. The periodic fluctuation in scratching force is attributed to the heterogeneous distribution and mechanical mismatch between yarns and the matrix. Edge collapse mainly results from local fiber aggregation caused by the mechanical contrast between fibers and matrix, displaying clear directionality relative to the processing path. In contrast to prior studies based on homogenized assumptions, this work introduces a three-phase anisotropic modeling framework and elucidates the dual role of ultrasonic vibration in damage evolution. These findings offer new mechanistic insights and a theoretical foundation for optimizing precision machining strategies for advanced ceramic composites.</p>

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Three-phase ultrasonic vibration cutting simulation and mechanism for SiO2f/SiO2 composites including structural anisotropy

  • 期刊论文

  • 发表日期：

    2026年1月30日

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  • Hongyi Zhang,
  • Qinghua Song,
  • Songqian Lu,
  • Jixiang Gong,
  • Yicong Du,
  • Liping Jiang,
  • Yukui Cai,
  • Zhanqiang Liu,
  • Qiang Luan

摘要

Quartz fiber-reinforced quartz ceramic matrix composites (SiO2f/SiO2 CMCs) show considerable promise for high-temperature wave-transparent applications. However, machining these materials often leads to typical fiber damage mechanisms such as edge collapse, fiber pull-out, and interphase debonding. To clarify how fiber orientation and scratch depth affect damage evolution, single abrasive scratching experiments were performed. An anisotropic three-phase cutting model was developed, incorporating the fiber, matrix, and interphase structure based on the actual yarn-matrix architecture. The simulated surface morphology shows strong agreement with experimental observations. Ultrasonic vibration is found to exert a dual influence on microcrack initiation and propagation: on one hand, high-frequency impacts transmitted through the quartz fibers enhance matrix crack growth and promote brittle spallation along fiber surfaces; on the other hand, it helps disperse strain zones and alleviates local stress concentration, thereby delaying crack initiation. The periodic fluctuation in scratching force is attributed to the heterogeneous distribution and mechanical mismatch between yarns and the matrix. Edge collapse mainly results from local fiber aggregation caused by the mechanical contrast between fibers and matrix, displaying clear directionality relative to the processing path. In contrast to prior studies based on homogenized assumptions, this work introduces a three-phase anisotropic modeling framework and elucidates the dual role of ultrasonic vibration in damage evolution. These findings offer new mechanistic insights and a theoretical foundation for optimizing precision machining strategies for advanced ceramic composites.