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

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

doi:10.1007/s40436-024-00532-x

Advances in Manufacturing ›› : 1 -15. DOI: 10.1007/s40436-024-00532-x

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

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¹ College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People’s Republic of China

^b zhangql@nuaa.edu.cn

Jia-Heng Zeng is a PhD candidate in the Department of Mechanical Engineering at Nanjing University of Aeronautics and Astronautics, Nanjing, China. His current research interests include laser machining and laser assisted machining of ceramic matrix composites.

Quan-Li Zhang earned his Ph.D. in the Department of Mechanical Engineering from Harbin Institute of Technology, Harbin, China, in 2017. He is currently an associate professor in the College of Mechanical & Electrical Engineering at Nanjing University of Aeronautics and Astronautics. His research interests include ultra precision grinding of hard and brittle materials, laser assisted machining, surface damage mechanism, and machining process simulation.

Yu-Can Fu earned his Ph.D. in Mechanical Engineering from Nanjing University of Aeronautics and Astronautics, Nanjing, China, in 1999. Currently, he serves as a professor and dean of the College of Mechanical & Electrical Engineering at Nanjing University of Aeronautics and Astronautics. His research focuses on high efficiency precision machining technology for challenging materials, tool technology for superhard materials, green high efficiency cooling technology, and high performance composite machining technology.

Jiu-Hua Xu earned his Ph.D. in Mechanical Engineering from Nanjing University of Aeronautics and Astronautics, Nanjing, China, in 1992. Currently, he serves as a professor and head of the Institute of High Efficiency Precision Machining Technology at Nanjing University of Aeronautics and Astronautics. His research interests include high performance cutting/grinding technology, superhard abrasive tool technology, and high efficiency composite machining technology.

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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 SiC_f/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.

Keywords

Nanosecond pulsed laser / SiC_f/SiC composites / Plasma / Surface characteristics / Ablation thresholds

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Jia-Heng Zeng, Quan-Li Zhang, Yu-Can Fu, Jiu-Hua Xu. Heterogeneous ablation behavior of SiC_f/SiC composite by nanosecond pulse laser. Advances in Manufacturing 1-15 DOI:10.1007/s40436-024-00532-x

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