Accession Number:

AD1096717

Title:

Optimizing the Performance of Aluminized Explosives: Laser-Based Measurements of Energy Release and Spectroscopic Diagnostics

Descriptive Note:

Technical Report,01 Dec 2018,31 Jul 2019

Corporate Author:

CCDC Army Research Laboratory Aberdeen Proving Ground United States

Personal Author(s):

• Gottfried,Jennifer L
• Dean,Steven W
• Wu,Chi-Chin
• De Lucia,Frank Jr C

Report Date:

2020-04-09

Pagination or Media Count:

22.0

Abstract:

Commercial aluminum powders nanometer- and micrometer-sized have been thoroughly characterized by conventional analytical techniques to compare source and lot-to-lot variations in the material properties. The energy release rates of milligram-quantity samples ignited with a nanosecond-pulsed laser at heating rates on the order of 1013 Ks have been investigated by measuring the laser-induced shock wave velocities and tracking the formation of aluminum monoxide on both the microsecond and millisecond timescales. By comparing the material properties and resultant energetic behavior, new insights into the optimal properties have been achieved. Preliminary results from methods we are investigating to accelerate the oxidation of aluminum in explosive formulations for enhanced detonation performance are also discussed.

Descriptors:

• lasers
• ablation
• aluminum
• detonations
• emission spectroscopy
• Aluminized Explosives
• shock waves
• velocity
• oxidation
• alloys
• carbon
• Passivation (metallurgy)
• coatings
• particle size
• powder metals
• electron microscopy

Subject Categories:

• Ammunition and Explosives
• Lasers and Masers
• Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE