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Influence of the Metal Particle Size on the Ignition of Energetic Materials
Author(s) -
Weiser Volker,
Kelzenberg Stefan,
Eisenreich Norbert
Publication year - 2001
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/1521-4087(200112)26:6<284::aid-prep284>3.0.co;2-t
Subject(s) - propellant , ignition system , materials science , particle (ecology) , energetic material , hot spot (computer programming) , particle size , metal particle , autoignition temperature , composite material , metal , chemical engineering , metallurgy , explosive material , thermodynamics , chemistry , physics , oceanography , engineering , geology , organic chemistry , computer science , operating system
A theoretical study of multi‐particle ignition uses a hot spot model which calculates the temperature evolution of individual hot spots in an energetic material. It indicated that ultra‐fine hot particles would be very effective in igniting energetic materials if impinging and penetrating the solid propellant. Igniting mixtures were prepared containing ultra‐fine Ti particles which react fastest compared with coarse particle mixtures, standard B/KNO 3 and black powder. The ultra‐fine particles, however, are obviously oxidized or gasified too fast as to reach the energetic material to be initiated and longer ignition delays are found mainly compared with coarse particle mixtures. An optimized mixture of coarse and ultra‐fine particles would give an improvement of ignition delay times.