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Title: Ignition characteristics of laser-ablated aluminum at shock pressures up to 2 GPa

The ignition of aluminum particles under high pressure and temperature conditions is considered. The laser ablation method is used to generate oxide-free aluminum particles exposed to pressures ranging between 0.35 and 2.2 GPa. A continuous wave CO{sub 2} laser radiation heats the surface of the aluminum target until ignition is observed. We confirm ignition by a spectroscopic analysis of AlO vibronic band of 484 nm wavelength, and the radiant temperature is measured with respect to various pressures for estimating the heating energy for ignition. The ignition characteristics of the oxide-free aluminum particles exposed to extremely high pressures are reported.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Department of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanakro, Gwanakgu, Seoul 151-742 (Korea, Republic of)
  2. Division of Applied Physics, Hokkaido University, Sapporo (Japan)
  3. Department of Aerospace Engineering, University of Maryland, College Park, Maryland 20742 (United States)
Publication Date:
OSTI Identifier:
22271304
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABLATION; ALUMINIUM; CARBON DIOXIDE LASERS; HEATING; LASER RADIATION; PARTICLES; PRESSURE DEPENDENCE; PRESSURE RANGE GIGA PA; SURFACES; TEMPERATURE DEPENDENCE