Murzin, S. P., Balyakin, V. B., Gachot, C., Fomchenkov, S. A., Blokhin, M. V., & Kazanskiy, N. L. (2021). Ultraviolet nanosecond laser treatment to reduce the friction coefficient of silicon carbide ceramics. Applied Sciences, 11(24), 11906. https://doi.org/10.3390/app112411906
Computer Science Applications; General Engineering; General Materials Science; Instrumentation; Fluid Flow and Transfer Processes; Process Chemistry and Technology; ultraviolet nanosecond laser; silicon carbide ceramics; friction coefficient; surface mi- crostructuring; gas-dynamic seals
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Abstract:
The determination of the possibility for the reduction of the friction coefficient of ceramic parts from silicon carbide by pulse-periodic treatment with an ultraviolet nanosecond laser was carried out in the framework of this research. The gas-dynamic seal of the compressor rotor of the gas-turbine engine after hot isostatic pressing and mechanical treatment was exposed to surface microstructuring in a pulse-periodic mode. For experimental investigations, a laser with a maximum energy of the pulse of 50 μJ, a wavelength of 355 nm, and a pulse duration below 10 ns was used. It was determined that the surface quality was improved, and the surface roughness was reduced as a consequence of the realized laser polishing modes in the beam exposure area. The average value of the friction coefficient of the ceramic material surface decreased by 15% as result of pulse-periodic laser processing.
