The features of laser drilling of composite highly porous ceramics consisting of aluminosilicates, glass and a small addition of polystyrene (EPS) are studied experimentally. It was found that the formation of a liquid phase can contribute to the strengthening of ceramics. A list of factors determining the dynamics of hole formation is proposed. These include not only the previously known processes of heating, melting, ablation, and ejection for metals and dense ceramics, but also a number of others: boiling of the component of the mixture with the lowest temperature of thermal decomposition and its departure from the affected zone; melt less volatile component; sealing of ceramics adjacent to the walls; glass transition of the liquid phase upon cooling after irradiation. These effects depend on the density of the composite, as well as on the viscosity of the liquefied material.
Ya.S. FIRONOV 1 , Cand. physical-mat. Sci. I. V. MELNIKOV 1 , Cand. physical-mat. E. R. NADEZHDIN 2 , Dr. of Phys.-Math. Sciences V. N. TOKAREV 3
; 1 School of Radio Engineering and Computer Technologies, MIPT (Russia, Dolgoprudny)
2 HTC Marine Geophysics, MIPT (Russia, Dolgoprudny)
3 General Physics Institute A.M. Prokhorova of the Russian Academy of Sciences (GPI RAS) (Russia, Moscow)
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