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JOURNALS // Problemy Fiziki, Matematiki i Tekhniki (Problems of Physics, Mathematics and Technics) // Archive

PFMT, 2018 Issue 3(36), Pages 49–54 (Mi pfmt584)

PHYSICS

Laser thermosplitting of sapphire by crescent-shaped beams

S. V. Shalupaev, Yu. V. Nikitjuk, A. A. Sereda

F. Scorina Gomel State University

Abstract: In the framework of the thermoelasticity theory, a comparative analysis of the temperature fields and fields of thermoelastic stresses arising in the plates of crystalline sapphire in the process of single-beam and two-beam controlled laser thermosplitting is carried out using round and crescent-shaped beams. It is shown that the use of crescent-shaped beams provides the formation of tensile stresses necessary for the stable realization of the laser thermosplitting process, with a significant reduction in the maximum temperatures in the samples compared with the use of round-shaped beams.

Keywords: : thermosplitting, modeling, finite element method, temperature, single crystal, sapphire, thermoelastic stresses.

UDC: 621.373.8:621.937:549.517.14

Received: 17.08.2018



© Steklov Math. Inst. of RAS, 2024