Advances in Manufacturing ›› 2025, Vol. 13 ›› Issue (1): 196-210.doi: 10.1007/s40436-024-00532-x

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Heterogeneous ablation behavior of SiCf/SiC composite by nanosecond pulse laser

Jia-Heng Zeng, Quan-Li Zhang, Yu-Can Fu, Jiu-Hua Xu   

  1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People's Republic of China
  • Received:2024-01-02 Revised:2024-04-18 Published:2025-02-26
  • Contact: Quan-Li ZHANG,E-mail:zhangql@nuaa.edu.cn E-mail:zhangql@nuaa.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (NSFC) (Grant Nos. 52175412, 92060203), the Natural Science Foundation of Jiangsu Province (Grant No. BK20201298), the Science Center for Gas Turbine Project (Grant No. P2022-A-IV-002-001), and the Interdisciplinary Innovation Fund for Doctoral Students of Nanjing University of Aeronautics and Astronautics (Grant No. KXKCXJJ202205).

Abstract: Silicon carbide fiber-reinforced silicon carbide composites are preferred materials for hot-end structural parts of aero-engines. However, their anisotropy, heterogeneity, and ultra-high hardness make them difficult to machine. In this paper, 2.5-dimensional braided SiCf/SiC composites were processed using a nanosecond pulsed laser. The temperature field distribution at the laser ablated spot is analyzed through finite element modeling (FEM), and the ablation behavior of the two main components, SiC fiber and SiC matrix, is explored. A plasma plume forms when the pulse energy is sufficiently high, which increases with growing energy. The varied ablation behavior of the components is investigated, including the removal rate, ablative morphology, and phase transition. The ablation thresholds of SiC matrix and SiC fiber are found to be 2.538 J/cm2 and 3.262 J/cm2, respectively.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-024-00532-x

Key words: Nanosecond pulsed laser, SiCf/SiC composites, Plasma, Surface characteristics, Ablation thresholds