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Title: Laser shock ignition of porous silicon based nano-energetic films

Nanoporous silicon films on a silicon wafer were loaded with sodium perchlorate and initiated using illumination with infrared laser pulses to cause laser thermal ignition and laser-generated shock waves. Using Photon Doppler Velocimetry, it was determined that these waves are weak stress waves with a threshold intensity of 131 MPa in the silicon substrate. Shock generation was achieved through confinement of a plasma, generated upon irradiation of an absorptive paint layer held against the substrate side of the wafer. These stress waves were below the threshold required for sample fracturing. Exploiting either the laser thermal or laser-generated shock mechanisms of ignition may permit use of pSi energetic materials in applications otherwise precluded due to their environmental sensitivity.
Authors:
; ;  [1] ;  [2] ;  [1] ;  [2] ;  [3] ;  [4]
  1. School of Chemical and Physical Sciences, Flinders University, 5042, Bedford Park (Australia)
  2. (CEEM), Bedford Park (Australia)
  3. (Australia)
  4. Mawson Institute, University of South Australia, 5095, Mawson Lakes (Australia)
Publication Date:
OSTI Identifier:
22314580
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; FRACTURING; IGNITION; ILLUMINANCE; IRRADIATION; LASERS; LAYERS; PLASMA; PLASMA CONFINEMENT; POROUS MATERIALS; PRESSURE RANGE MEGA PA 100-1000; PULSES; SHOCK WAVES; SILICON; SODIUM PERCHLORATES; STRESSES; SUBSTRATES