Design and evaluation of progressively burning pyrotechnic formulations

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The design and evaluation of a pyrotechnic that burns for 2 ms and generates gas cubically with time is described. The charge is a mixture of two aluminum-plated pyrotechnics, viz., aluminum-potassium perchlorate (Al-KCl0/sub 4/) and aluminum-vanadium pentoxide (Al-V/sub 2/O/sub 5/). The Al-KCl0/sub 4/ is a gas generator, each gram of which produces 320 cc of gas (STP); the Al-V/sub 2/O/sub 5/, on the other hand, is a gasless pyrotechnic. Progressive generation of gas is achieved by utilizing mixtures of two pyrotechncs in increments that are progressively richer in gas generant, over a range of 14.6% to 100% Al-KCl0/sub 4/ by ... continued below

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Pages: 24

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Austing, J. L. & Cooper, P. W. January 1, 1980.

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Description

The design and evaluation of a pyrotechnic that burns for 2 ms and generates gas cubically with time is described. The charge is a mixture of two aluminum-plated pyrotechnics, viz., aluminum-potassium perchlorate (Al-KCl0/sub 4/) and aluminum-vanadium pentoxide (Al-V/sub 2/O/sub 5/). The Al-KCl0/sub 4/ is a gas generator, each gram of which produces 320 cc of gas (STP); the Al-V/sub 2/O/sub 5/, on the other hand, is a gasless pyrotechnic. Progressive generation of gas is achieved by utilizing mixtures of two pyrotechncs in increments that are progressively richer in gas generant, over a range of 14.6% to 100% Al-KCl0/sub 4/ by weight. The deflagration rate of the system is a function of the Al-KCl0/sub 4/ content, and ranges from 16.2 in./msec for a mixture with 14.6% Al-KCl0/sub 4/ by weight to 30.0 in./msec for pure Al-KCl0/sub 4/. An evaluation of the pyrotechnic charge fired in air showed that the design goals were adequately achieved. The growth of the gas cloud was monitored by high speed Fastax photography. Two criteria were utilized to verify the performance: (a) a plot of gas cloud volume as a function of time on logarithmic coordinates approached and maintained the required slope of 3, and (b) a plot of cloud diameter versus time on these coordinates achieved a slope of 1. In addition, the gas specific volume maintained a consistent value of about 27,000 cc/g of reacted Al-KCl0/sub 4/ throughout the 2.0-ms burning time.

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Pages: 24

Notes

NTIS, PC A02/MF A01.

Source

  • 7. international pyrotechnics seminar, Vail, CO, USA, 14 Jul 1980

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  • Report No.: SAND-80-0355C
  • Report No.: CONF-800713-1
  • Grant Number: EY-76-C-04-0789
  • Office of Scientific & Technical Information Report Number: 5485671
  • Archival Resource Key: ark:/67531/metadc1092832

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  • January 1, 1980

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • April 16, 2018, 7:03 p.m.

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Austing, J. L. & Cooper, P. W. Design and evaluation of progressively burning pyrotechnic formulations, article, January 1, 1980; United States. (digital.library.unt.edu/ark:/67531/metadc1092832/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.