The optical properties and microstructure of composites based on yttrium aluminum garnet were studied. The composites were produced by vacuum sintering pre-formed compacts of nanocrystalline powder with the composition Y3Al4.995Cr0.005O12 in conjunction with a YAG single crystal. The light transmission spectra of composite samples showed absorption bands of Cr3+ after vacuum sintering and bands of Cr4+ after annealing in air. The effect of heating rate during vacuum sintering on the light transmission of composite samples was investigated. It was determined that the optimal heating rate during vacuum sintering of composites should not exceed 120 °C/h. The influence of vacuum sintering temperature on the optical properties and microstructure of YAG:Cr (ceramics)/YAG:Nd (single crystal) composite samples was also examined. The most transparent samples were obtained at a temperature of 1850 °C. Microstructure studies of the composites revealed the presence of regular residual porosity near the interface, primarily located in the YAG single crystal. It is hypothesized that the formation of these pores occurs during the fusion of ceramic grains with the single crystal during sintering.
Fedor F. Malyavin – Head of Ceramics Sintering Sector of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia
Victoria E. Suprunchuk – Candidate of Chemical Sciences, senior researcher of the Nanopowder Synthesis Sector of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia
Vitaly A. Tarala – Candidate of Chemical Sciences, Head of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia
Alexander A. Kravtsov – Candidate of Technical Sciences, Head of the Nanopowder Synthesis Sector of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia
Dmitry S. Vakalov – Candidate of Physical and Mathematical Sciences, Head of the Sector of Physical and Chemical Methods of Research and Analysis of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia
Viacheslav A. Lapin – Candidate of Technical Sciences, senior researcher of the Sector of Physical and Chemical Methods of Research and Analysis of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia
Konstantin V. Kungurtsev – deputy head of the Single Crystal Growth Section of LLC NPF “Eksiton”, Stavropol, Russia
Evgeniy V. Medyanik – researcher of Ceramics Sintering Sector of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia
Ludmila V. Tarala – researcher of the Nanopowder Synthesis Sector of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia
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DOI: 10.14489/glc.2024.06.pp.011-021
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