Studies of the processes of precursor formation for the production of CuAl_1-xMg_xO₂ nanoceramics under the influence of double laser pulses on AMg2 and M2 alloys in the air atmosphere

The possibility of forming precursors for the production of magnesium-doped copper aluminates under the action of a series of double laser pulses on an aluminum and copper target in an air atmosphere is investigated. A study of the formation of mixed nanopowders of Al₂O₃, copper and magnesium oxides, and Al under the influence of double laser pulses with an energy of 53 mJ and between the pulse interval of 10 microseconds on a hybrid target consisting of plates of aluminum grade AMg2 and copper grade M2, 0.8 mm thick, glued together and placed in a closed rectangular glass cuvette. It is established that the successive exposure of a series of double laser beams to a target made of AMg2 alloy, and then to a target made of copper, leads to a multiple increase in the yield of AlO suboxides, ions and atoms of aluminum, magnesium and copper in the laser torch, compared with the exposure to single laser pulses. To better understand the hidden mechanisms of this dependence, we study the processes occurring both on the surface and in the near-surface laser plasma inside the resulting microchannel when the target is broken by a series of single and double laser pulses. The possibility of obtaining precursors for the production of nanoceramics of the CuAl_1-xMg_xO₂ type is shown. (authors)