Mechanoluminescence and Optically Stimulated Antistokes Luminescence of Composites Based on Epoxy Resin and Strontium Aluminate Phosphors SrAl<sub>2</sub>O<sub>4</sub>:Eu<sup>2+</sup>,Dy<sup>3+</sup> and Sr<sub>4</sub>Al<sub>14</sub>O<sub>25</sub>:Eu<sup>2+</sup>, Dy<sup>3+</sup>

Composite mechanoluminescent materials (composites) based on epoxy resin transparent in the visible range of spectrum and fine-dispersed powders of mechanoluminescent phosphors SrAl2O4:Eu2+, Dy3+ and Sr4Al14O25:Eu2+, Dy3+ were obtained. The mechanoluminescence and photoluminescence spectra of composites under the combined influence of short-wave (λ = 405 nm) and long-wave (λ = 1.06 µm) laser radiation were studied. The attenuation of optically stimulated antistokes luminescence of the composite under the influence of a sequence of pulses of longwave laser radiation was investigated. The composite was pre-irradiated with shortwave laser radiation. The obtained composite was used to visualize heat propagation and thermal deformations in metal plates arising under the action of powerful laser pulses and distribution of deformations under mechanical impact. For this purpose, a thin layer of the composite was applied to the surface of the materials under study. The composite had good adhesion to the surface of the materials and a high yield of mechanoluminescence, which allowed to visualize the distribution of temperature and surface deformations with a good spatial and temporal resolution.