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- W1975739072 abstract "• Femtosecond pulsed laser nanotexturing of Si 3 N 4 /TiC ceramic was investigated. • The optimum processing parameters for the formation of ripples were identified. • Surface morphology, ablation dimension and surface roughness were measured. • Formation mechanism of ripples on Si 3 N 4 /TiC ceramic surface was discussed. Multiple nanoscale parallel grooves were induced on Si 3 N 4 /TiC ceramic by a femtosecond pulsed laser with a pulse width of 120 fs, wavelength of 800 nm and repetition rate of 1000 Hz. Pulse energy, scanning speed and the number of overscans were studied for the formation of regular parallel grooves. The evolution of surface morphology, ablation dimension and surface roughness with different processing parameters was measured by scanning electron microscope (SEM), atomic force microscope (AFM) and white light interferometer. The results show that the uniform multiple nanoscale parallel grooves are obtained by optimizing the pulse energy, scanning speed and number of overscans. The optimum parameters are 2.5 μJ pulse energy and 130 μm/s scanning speed with 1 overscan. At a constant scanning speed of 130 μm/s, the period of the parallel grooves stays relatively constant with increasing pulse energy, fluctuating around 600 nm, which is smaller than the laser wavelength. Additionally, the period was found to increase in a roughly linear fashion with increasing scanning speed. The depth of grooves increases with the increasing pulse energy and decreasing scanning speed; the surface roughness increases with the increasing pulse energy, decreasing scanning speed and increasing number of overscans. Meanwhile, the formation mechanism of laser-induced multiple nanoscale parallel grooves on the Si 3 N 4 /TiC ceramic surface was discussed." @default.
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- W1975739072 date "2014-01-01" @default.
- W1975739072 modified "2023-09-26" @default.
- W1975739072 title "Multiple nanoscale parallel grooves formed on Si3N4/TiC ceramic by femtosecond pulsed laser" @default.
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- W1975739072 doi "https://doi.org/10.1016/j.apsusc.2013.10.094" @default.
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