Classifications

• • C—CHEMISTRY; METALLURGY
  • C06—EXPLOSIVES; MATCHES
  • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
  • C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
  • C06B45/02—Compositions or products which are defined by structure or arrangement of component of product comprising particles of diverse size or shape
• • C—CHEMISTRY; METALLURGY
  • C06—EXPLOSIVES; MATCHES
  • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
  • C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
  • C06B33/08—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide with a nitrated organic compound
• • C—CHEMISTRY; METALLURGY
  • C06—EXPLOSIVES; MATCHES
  • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
  • C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
  • C06B33/08—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide with a nitrated organic compound
  • C06B33/10—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide with a nitrated organic compound the compound being an aromatic

Definitions

• the technical field of the invention is that of explosive compositions.
• compositions have the advantage of generating an effect blast that is due to the burning of aluminum when the detonation.
• the nanometric aluminum used is that sold under the Alex brand (particle size between 100 and 200 nanometers). The tests have shown that adding 10% aluminum nanometric to trinitrotoluene the detonation velocity was increased.
• composition B (60% by weight of trinitrotoluene / 40% mass of Hexogen) which has a detonation velocity of 7891 m / s sees this speed increase to 7598 m / s after addition of 10% by weight of nanometric aluminum (293m / s decrease).
• the subject of the invention is an explosive composition
• an explosive composition comprising at least one explosive material and powder of aluminum, characterized in that the powder of aluminum comprises a mixture of at least a first type of aluminum powder with a micrometric minus a second type of grain size aluminum powder nanoscale.
• particle size is micrometer a particle size between 4 micrometers and 105 micrometers and by nanometer particle size a particle size less than 4 microns.
• nanometric and micrometric aluminum mix allows to improve the flowability of explosive compositions achieved by decreasing the viscosity.
• composition comprising 5% to 16% by weight of nanoscale aluminum associated with 2% to 10% aluminum grain size micrometric, the global mass of aluminum implemented being less than or equal to 30%.
• the explosive material may be a fusible explosive, for example trinitrotoluene or another aromatic nitrate with higher melting temperature at 100 ° C.
• EP0814069 discloses mergeable explosives particularly interesting because explosive compositions with reduced vulnerability. From fusible explosives cited we can consider: 2,4,6-trinitro-N-methylaniline (TNMA), 2,4,6-trinitro-3-methylphenol, 3-Amino-Trinitrotoluene, 2,4,6-Trinitro Aniline, 1,3,8-TrinitroNaphthalene and its mixture of isomers which is fusible at 115 ° C, the TNAZ (1,2,3 - trinitroazetidine) and its eutectics.
• TNMA 2,4,6-trinitro-N-methylaniline
• 3-Amino-Trinitrotoluene 2,4,6-Trinitro Aniline
• 1,3,8-TrinitroNaphthalene 1,3,8-TrinitroNaphthalene and its mixture of isomers which is fusible at 115 ° C
• the TNAZ (1,2,3 - trinitroazetidine
• the explosive material will comprise ammonium perchlorate or ammonium nitrate.
• the explosive material used comprises from 20% to 50% by weight of trinitrotoluene (proportions given in proportion relative mass of the explosive material alone).
• composition B associating 25% to 50% by weight of trinitrotoluene and 50% to 75% by weight of hexogen, in relative mass proportions of the material explosive alone.
• composition to reduced vulnerability in which the explosive material put is a composition associating 30% to 50% by weight of a mergeable explosive, 20% to 70% by mass of at least one explosive grain with reduced vulnerability, and 0% to 30% of complementary explosive in grains, percentages given in relative mass proportions of the explosive material alone.
• ONTA oxynitrotriazole
• TATB triaminotrinitrobenzene
• NGu nitroguanidine
• a composite explosive composition ie associating one or several explosive materials with one or more binders polymerizable (active or inert).
• This composition therefore comprises 15% aluminum by weight.
• the micrometric aluminum has a mean particle size of 15 micrometers.
• Nanometric aluminum has an average particle size of 50 nanometers.
• the mergeable explosive is fused into a mixer. Hexogen and aluminum are also mixed then we mix this mixture with the explosive meltable in the mixer.
• the micrometric aluminum has a mean particle size of 15 micrometers.
• Nanometric aluminum has an average particle size of 50 nanometers. No. Hexogenous% Trinitro-toluene% Aluminum Micro-metric% Nano-metric aluminum% Detonation speed m / s AT 65 35 0 0 7983 B 58 32 10 0 7830 VS 55 30 15 0 7760 D 48 26 26 0 7607 E 54 36 0 10 7598 Ex1 55 30 5 10 > 7960
• the composition according to the invention (Ex1) has a detonation velocity (7960 m / s) which is greater than that (ref E) measured by the authors of the publication of Propellants, Explosives and Pyrotechnics (27/02/2002) (7598 m / s).
• the composition according to the invention has a velocity of detonation greater than 200m / s to that of the composition (ref C) using aluminum micrometer.
• the detonation level of the composition according to the invention is substantially equivalent to that of the composition B 65/35 (ref A) whereas it comprises 15% less explosive.
• compositions are produced as follows:
• the two powder granulometries are first mixed of aluminum then mixed with explosive materials.
• the binder is placed in a mixer maintained in temperature. Solid explosive mixed with aluminum is introduced gradually in the binder.
• a binder of polymerization hardener
• the patent FR2801883 describes such compositions which have for the main characteristic of associating an explosive with reduced vulnerability such as ONTA, a complementary explosive such as hexogen or octogen, an aluminum powder and a coating wax for implementation by compression.

Applications Claiming Priority (2)

Publications (1)

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Cited By (3)

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• 2004
  • 2004-04-07 FR FR0403727A patent/FR2868774B1/fr not_active Expired - Lifetime
• 2005
  • 2005-04-04 EP EP20050290732 patent/EP1584610A2/de not_active Withdrawn
  • 2005-04-04 CA CA 2502155 patent/CA2502155A1/fr not_active Abandoned
  • 2005-04-06 NO NO20051710A patent/NO20051710L/no not_active Application Discontinuation

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