STUDY OF PARTICLE DYNAMICS IN SURFACE COATING APPLICATIONS

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Authors
  1. Frost, D.
  2. Lee, J.
  3. Murray, S.
Corporate Authors
Defence Research Establishment Suffield, Ralston ALTA (CAN);McGill Univ, Montreal QUE (CAN) Dept of Mechanical Engineering
Abstract
Solid particles can be accelerated to high speeds in the expansion flow of the combustion products of a condensed explosive. When these particles impact on a substrate, they bind mechanically to the surface of the substrate forming a strong surface coating. Over the last several years, laboratory experiments at McGill University with cylindrical charges and field experiments at the Defence Research Establishment Suffield (DRES) test range with sppherical charges have been carried out to investigate the use of a liquid explosive for accelerating particles to high velocities. In both cases a heterogeneous explosive consisting of a packed bed of inert solid beads saturated with a liquid explosive was used. The present report describes the results of these experiments, with emphasis placed on the more extensive series of field trials. The field trials were performed using spherical charges consisting of packed beds of steel or glass particles (ranging in size from 50 to 925 mu m) saturated with nitromethane (NM) sensitized with 10% triethylamine (TEA). The charges were contained within thin-walled glass spheres and detonated with a small centrally-located burster charge. Three different charge sizes were used, with the mass of explosive varied over an order of magnitude, from about 200 g to about 2,400 g. The dispersal of the beads was tracked with the use of flash X-ray radiography. TRUNCATED
Keywords
Blast waves
Report Number
DRES-CR-98-10 — Contract Report
Date of publication
01 Apr 1998
Number of Pages
75
DSTKIM No
98-01192
CANDIS No
507959
Format(s):
Hardcopy;Document Image stored on Optical Disk

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