Overheating of metals under transparent films by pulsed laser beam

Alexander A. Karabutov; Alexander P. Kubyshkin; Vladislav Ya. Panchenko; Natalia B. Podymova

doi:10.1117/12.171632

1 April 1994 Overheating of metals under transparent films by pulsed laser beam

Alexander A. Karabutov, Alexander P. Kubyshkin, Vladislav Ya. Panchenko, Natalia B. Podymova

Proceedings Volume 2257, Russia National Conference: Industrial Lasers and Laser Material Processing; (1994) https://doi.org/10.1117/12.171632
Event: Industrial Lasers and Laser Material Processing: Russian National Conference, 1993, Shatura, Moscow Region, Russian Federation

Abstract

The paper presents the results of theoretical and experimental investigation on the process of metal boiling initiated by pulsed laser beam, with a transparent layer on the metal surface that provides the impedance acoustic load. The theoretical analysis shows that with the squeezed surface, when the energy thresholds of metal boiling essentially depend on laser pulse shape and duration, considerable overheating of metal is possible in the course of laser pulse. In the experiments on mercury, nonlinear variations in the photoacoustic signal were registered that are due to vapor pressure contribution under the excess of boiling thresholds. The experimental values of mercury boiling thresholds under pulse laser heating agree well with theoretical estimates.

Citation Download Citation

Alexander A. Karabutov, Alexander P. Kubyshkin, Vladislav Ya. Panchenko, and Natalia B. Podymova "Overheating of metals under transparent films by pulsed laser beam", Proc. SPIE 2257, Russia National Conference: Industrial Lasers and Laser Material Processing, (1 April 1994); https://doi.org/10.1117/12.171632

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