Study of aluminum nitride formation in plasma with an effect of double laser pulses on the d16t aluminum alloy in air

Abstract

In this paper, we propose new opportunities to increase the proportion of various aluminum ions in near-surface laser plasma in the regimes of ablation of aluminum alloy surfaces by defocused double laser pulses, and AlN nanoclusters under the sequential influence of double pulses on the target (D16T aluminum alloy). The experimental results show that the intensity of spectral lines of Al ions reaches its maximum when time intervals between the double pulses of the order of 5÷15µs, the pulse energy of 42mJ (Al II) and 38mJ (Al III). The percentage of AlN nanoclusters reaches a maximum at the energy of pulses of about 40 mJ, defocus of 0 mm and the number of pulses of 25÷30.