Higher Time-Resolution LASEM, Part I: Influence of Aluminum Morphology on Laser-Induced Shock Waves and Chemistry

Abstract

Previous work demonstrated the differences in plasma plume and combustion dynamics following the pulsed-laser excitation of aluminum (Al) samples with different morphology. Here, a newly upgraded laser-induced air shock from energetic materials (LASEM) system with improved time-resolution and diagnostic capabilities was used to investigate the influence of Al morphology on the energy release rates (microsecond and millisecond timescales) and the high-temperature chemistry. Our results confirm that more Al nanoparticles react on the microsecond timescale than micron-sized Al particles, resulting in stronger laser-induced shock velocities and increased aluminum monoxide emission. This data provides insights into the mechanisms for Al oxidation that could lead to advancements in the development of aluminized formulations for enhanced energetic performance.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2020
Accession Number
AD1108544

Entities

People

  • Jennifer L Gottfried

Organizations

  • United States Army Combat Capabilities Development Command

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Change Detection
  • Chemical Reactions
  • Chemistry
  • Combustion
  • Detectors
  • Energetic Materials
  • Explosives
  • High Temperature
  • Light Sources
  • Materials
  • Materials Laboratories
  • Materials Science
  • Metallic Nanoparticles
  • Nanoparticles
  • Particles
  • Pulsed Lasers

Fields of Study

  • Physics

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Combustion science or combustion engineering.
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Biotechnology
  • Directed Energy