Phase Transformations in High-Temperature Fiber Materials Exposed to Non-Equilibrium Flow of Heat and Light

The changes of the phase composition and structure of modern ceramic materials on exposure to an intense flow of light were investigated. The technological possibilities of a unique facility — Big Solar Furnace — were used to perform the experiment. It was shown that surface treatment of a ceramic material in the system Al 2 O 3 –SiO 2 by a high-temperature source of energy results in the appearance of two new phase compositions — α-Al 2 O 3 and cristobalite. Treatment of the material in the fusion regime promotes the formation of a eutectic component.