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<p>The generation of vapor–gas formation at the surface of metal immersed in liquid under the influence of radiation from a GOR-100M laser operating in free generation mode (pulse length 1.2 ms, flux density ~10<sup>6</sup> W/cm<sup>2</sup>) was experimentally investigated. Features of changes in the shape and size of near-surface formation at different stages of the process, including those after the completion of laser treatment of the material, were studied. The temperature and pressure inside the vapor–gas mixture were calculated according to the proposed methodology. The shapes of crater surfaces formed by the impact of laser pulses with identical parameters on identical samples surrounded by air and water differed significantly because of the fundamentally different nature of the flows of plasma and vapor–gas mixture in these cases. Nanoparticles and nanostructures could be produced when millisecond laser pulses were applied to metal samples located in water.</p>

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Dynamics of Processes Influenced by Laser Radiation on a Metallic Sample Located in Water

  • 期刊论文

  • 发表日期：

    2026年7月4日

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  • S. V. Vasiliev,
  • A. L. Sitkevich,
  • V. A. Shulenkova

摘要

The generation of vapor–gas formation at the surface of metal immersed in liquid under the influence of radiation from a GOR-100M laser operating in free generation mode (pulse length 1.2 ms, flux density ~106 W/cm2) was experimentally investigated. Features of changes in the shape and size of near-surface formation at different stages of the process, including those after the completion of laser treatment of the material, were studied. The temperature and pressure inside the vapor–gas mixture were calculated according to the proposed methodology. The shapes of crater surfaces formed by the impact of laser pulses with identical parameters on identical samples surrounded by air and water differed significantly because of the fundamentally different nature of the flows of plasma and vapor–gas mixture in these cases. Nanoparticles and nanostructures could be produced when millisecond laser pulses were applied to metal samples located in water.