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Title: Enhanced coupling of optical energy during liquid-confined metal ablation

Liquid-confined laser ablation was investigated with various metals of indium, aluminum, and nickel. Ablation threshold and rate were characterized in terms of surface deformation, transient acoustic responses, and plasma emissions. The surface condition affected the degree of ablation dynamics due to variations in reflectance. The liquid confinement yielded up to an order of larger ablation crater along with stronger acoustic transients than dry ablation. Enhanced ablation performance resulted possibly from effective coupling of optical energy at the interface during explosive vaporization, plasma confinement, and cavitation. The deposition of a liquid layer can induce more efficient ablation for laser metal processing.
Authors:
 [1] ;  [2]
  1. Department of Biomedical Engineering, Pukyong National University, Busan, South Korea and Center for Marine-integrated Biomedical Technology (MIBT), Pukyong National University, Busan (Korea, Republic of)
  2. Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712 (United States)
Publication Date:
OSTI Identifier:
22492815
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 15; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABLATION; ALUMINIUM; CAVITATION; EVAPORATION; INDIUM; LASERS; LIQUIDS; NICKEL; PLASMA CONFINEMENT; SURFACES; TRANSIENTS; YIELDS