Synthesis of Precursors for the Production of Nanoceramics of the CuAlO2 Type Under the Influence of Double Laser Pulses on AD1 and M2 Alloys in Air

• Published in: Journal of applied spectroscopy 2023, Vol.90 (2), p.366-376
• Main Authors: Voropai, E. S., Alekseenko, N. A., Kovalenko, M. N., Markova, L. V., Zazhogin, A. P.
• Format: Article
• Language: English
• Subjects: Aggregates; Aluminates; Aluminum; Aluminum oxide; Analytical Chemistry; Atomic/Molecular Structure and Spectra; Condensates; Copper; Fractals; High speed steel tools; Incident radiation; Laser plasmas; Lasers; Line spectra; Metal plates; Physics; Physics and Astronomy; Precursors
• ISSN: 0021-9037; 1573-8647
• DOI: 10.1007/s10812-023-01543-5

The effect of the energy, the interval between the pulses, and the number of double laser pulses on the formation of the component and charge composition of laser plasma by laser spark spectrometry (LSS-1 spectrometer) was studied. The processes leading to the formation of mixed nanopowders of copper and aluminum oxides, precursors for the production of nanoceramics and films of CuAlO 2 copper aluminates by the action of double laser pulses on a hybrid target consisting of cemented aluminum and copper plates, from AD1 and M2 alloys were investigated. It was shown that precursors for the manufacture of nanoceramics and nanofilms of CuAlO 2 copper aluminates can be obtained by the successive action of a series of double laser pulses with energy of 53 mJ and an interval of 10 μs on a hybrid target. A closed glass weighing bottle containing the target was used for the products formed during interaction of the aluminum and copper ions with atmospheric oxygen. The size of the initial particles, determined by means of a high-resolution electron microscope, amounted to 30–45 nm. The particles were assembled into agglomerates and had a crystalline structure and spherical form. On account of the purely diffusion transfer mechanism of the fractals the size and amount of the fractal aggregates settling on the support situated at the bottom of the cuvette were several times greater than the amount of the products that settle on the side support. The main contribution to change in the intensity of the spectral lines for the Al and Cu atoms and ions and the AlO molecular bands comes from interaction of the second pulse with the condensation products formed in the channel after the action of the first pulse. With increase in the number of long-lived fractal aggregates in the air the intensity of molecular bands and lines decreases by ~1.5 times for Al III and by ~2 times for copper, which is due to active interaction of the long-lived large fractals that accumulate in the air with the incident radiation.