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- W4365452552 abstract "The multiscale laser ablation mechanism and performance of 2.5D Si3N4 f/SiBN-CMCs were investigated experimentally. The results show that the ablation process has obvious multiscale characteristics. The morphology of the ablation zone was determined by the temperature distribution, 2.5D microstructure, and location of the laser spot. The difference in thermal conductivity of the fiber and matrix induced a discrepancy in the cooling rate at the mesoscale, resulting in a regular distribution of the white powder of SiO2 on the matrix-rich zones in the ablation pit. The extremely high-temperature anaerobic environment caused by laser irradiation made the Si3N4 f/SiBN-CMCs undergo a violent decomposition reaction to generate liquid silicon. When the irradiation power density is constant, the ablation center and transition area diameters are all proportional to the laser energy. The linear ablation rate increases with increasing laser power but decreases with prolonged irradiation time. The ablation resistance of this composite is hampered by the absence of a continuous molten layer during exposure to the laser." @default.
- W4365452552 created "2023-04-15" @default.
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- W4365452552 date "2023-09-01" @default.
- W4365452552 modified "2023-09-27" @default.
- W4365452552 title "Multiscale ablation mechanism and performance of 2.5D Si3N4 f/SiBN-CMCs under continuous-wave laser irradiation" @default.
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- W4365452552 doi "https://doi.org/10.1016/j.jeurceramsoc.2023.04.023" @default.
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