publication . Article . 2016

Time-resolved Visualization of Laser Beam Melting of Silica Glass Powder

R.S. Khmyrov; Ivan Zhirnov; Andrey V. Gusarov; Andrey V. Gusarov; C.E. Protasov;
Open Access English
  • Published: 01 Jan 2016 Journal: Physics Procedia (issn: 18753892, Copyright policy)
  • Publisher: The Author(s). Published by Elsevier B.V.
Abstract
Abstract Silica glass is an inorganic dielectric material that can be used for laser beam melting without cracking. However, the extremely high viscosity makes consolidation of powder very slow. To study the dynamics of consolidation, a 10.6 μm laser beam was directed on the powder layer deposited on the solid substrate of the same material. The laser-interaction zone was lighted with green laser and filmed with a high-speed camera at 6000 fps. The process develops steadily. Neither fluctuation nor droplets are observed. An expanding consolidation zone is observed. Viscous merging of softened powder particles is supposed to be the principal mechanism of consolid...
Subjects
free text keywords: high-speed camera, powder consolidation, schrinkage, modeling, heat transfer, Physics and Astronomy(all), Viscosity, Dielectric, Visualization, Cracking, Composite material, Consolidation (soil), Materials science, Drop (liquid)
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