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<p>With the advancement of science, technology, and industrial production, silicon nitride full ceramic bearings have shown great potential and certain applications in aerospace, precision machine tools, high-speed trains, and various other fields owing to their exceptional physical properties. However, due to its unique manufacturing process and inherent high brittleness with low fracture toughness, silicon nitride ceramic bearings exhibit a&#xa0;significant failure mode known as rolling contact surface spalling failure. To mitigate the probability of failure in the rolling contact surface of the silicon nitride ceramic ball bearing raceway and enhance its service life, it is imperative to delve into understanding the crack propagation mechanism on the silicon nitride ring raceway surface. This paper investigates the influence of the initial crack inclination angle on the crack propagation mode, propagation rate, and deflection direction of the silicon nitride ball bearing raceway surface. The study yields valuable insights, and numerous pertinent conclusions are drawn. The outcomes of this research have the potential to markedly enhance the service life of silicon nitride ceramic ball bearings. They provide guidance for optimizing the grinding process of silicon nitride ceramic ball bearings and regulating and controlling the service parameters of silicon nitride ceramic ball bearings.</p>

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Research on propagation mechanism of silicon nitride full ceramic ball bearing ring raceway surface crack considering the initial inclination angle

  • 期刊论文

  • 发表日期：

    2025年6月20日

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  • Pengfei Wang,
  • Songhua Li,
  • Yuhou Wu,
  • Lixiu Zhang,
  • Chao Wei,
  • Yonghua Wang,
  • Gefei Lin

摘要

With the advancement of science, technology, and industrial production, silicon nitride full ceramic bearings have shown great potential and certain applications in aerospace, precision machine tools, high-speed trains, and various other fields owing to their exceptional physical properties. However, due to its unique manufacturing process and inherent high brittleness with low fracture toughness, silicon nitride ceramic bearings exhibit a significant failure mode known as rolling contact surface spalling failure. To mitigate the probability of failure in the rolling contact surface of the silicon nitride ceramic ball bearing raceway and enhance its service life, it is imperative to delve into understanding the crack propagation mechanism on the silicon nitride ring raceway surface. This paper investigates the influence of the initial crack inclination angle on the crack propagation mode, propagation rate, and deflection direction of the silicon nitride ball bearing raceway surface. The study yields valuable insights, and numerous pertinent conclusions are drawn. The outcomes of this research have the potential to markedly enhance the service life of silicon nitride ceramic ball bearings. They provide guidance for optimizing the grinding process of silicon nitride ceramic ball bearings and regulating and controlling the service parameters of silicon nitride ceramic ball bearings.