EP2516355A1 - Schmelzbare/giessbare explosive zusammensetzung mit geringem schadenpotenzial - Google Patents

Schmelzbare/giessbare explosive zusammensetzung mit geringem schadenpotenzial

Info

Publication number
EP2516355A1
EP2516355A1 EP10810766A EP10810766A EP2516355A1 EP 2516355 A1 EP2516355 A1 EP 2516355A1 EP 10810766 A EP10810766 A EP 10810766A EP 10810766 A EP10810766 A EP 10810766A EP 2516355 A1 EP2516355 A1 EP 2516355A1
Authority
EP
European Patent Office
Prior art keywords
weight
insensitive
composition
mass
explosive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10810766A
Other languages
English (en)
French (fr)
Other versions
EP2516355B1 (de
Inventor
Christophe Coulouarn
Stéphane BULOT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexter Munitions SA
Original Assignee
Nexter Munitions SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nexter Munitions SA filed Critical Nexter Munitions SA
Priority to PL10810766T priority Critical patent/PL2516355T3/pl
Publication of EP2516355A1 publication Critical patent/EP2516355A1/de
Application granted granted Critical
Publication of EP2516355B1 publication Critical patent/EP2516355B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C06B21/0033—Shaping the mixture
    • C06B21/005—By a process involving melting at least part of the ingredients
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • 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

Definitions

  • the technical field of the invention is that of fusible / flowable explosive compositions with reduced vulnerability.
  • Vulnerability tests are defined, for example, by the procedures described in AFNOR NFT 70510 to 70515 or in UN tests 7d) i (bullet impact), 7e) (fire resistance), 7f) (slow heating up). ), 7g), 7h), 7j) and 7k).
  • This reduced vulnerability is essentially achieved by the use of an explosive composition with reduced vulnerability.
  • Patent EP814069 thus describes a number of compositions combining a fuse part and a solid part.
  • the fusible portion essentially comprises a nitrated aromatic such as Trinitrotoluene (TNT) which is associated with a phlegmatizer such as wax.
  • TNT Trinitrotoluene
  • the solid part generally comprises oxynitro-triazole (ONTA) which is a grain explosive whose vulnerability is reduced. ONTA is more particularly described by the patent EP-210881.
  • RDX reduced sensitivity Hexogen
  • i-RDX deposited by Eurenco or under the name RS-RDX
  • RS-RDX reduced sensitivity Hexogen
  • compositions were thus made in which 40% by weight of Trinitrotoluene and 60% by weight of insensitive Hexogen (supplied by different sources) were combined.
  • the impact pressure values and the number of punched cards were measured (AFNOR standard test NFT 70-502 "Priming the detonation through a barrier").
  • the priming is done through screen cards.
  • the number of cards that is given is the minimum number needed to stop priming so as not to initiate an explosive to test. Concretely an insensitive explosive is not initiated through about 140 cards. Classic explosives require more than 200 cards.
  • the aim of the invention is to propose a fuse / castable explosive composition with reduced vulnerability and in which the proportion of Hexogen (RDX) is increased relative to the proportion of 1 oxynitrotriazole (ONTA) (which increases the detonation performances) but without diminishing the insensitivity of the composition thus obtained.
  • RDX Hexogen
  • ONTA 1 oxynitrotriazole
  • the subject of the invention is an explosive fuse / flowable and reduced vulnerability composition, comprising, on the one hand, a fusible part formed of at least one fusible explosive, and on the other hand a solid part comprising oxynitrotriazole.
  • ONTA and 1 Hexogen (RDX), a composition which is characterized in that the Hexogen is a Hexogen with reduced sensitivity, the particle size of the insensitive Hexogene being between 315 micrometers and 800 micrometers, while the particle size of the ONTA is between 200 micrometers and 400 micrometers, 1 1 ONTA also having a bulk density greater than or equal to 0.95 g / cm 3 .
  • the fusible explosive may be chosen from the following compounds: Trinitrotoluene, 2,4,6-Trinitro-N-methyl-Aniline, 2,4,6-Trinitro-3-methylphenol, 3 -Amino-Trinitrotoluene, 2,4,6-Trinitroaniline, 1,3,8-TriNitroNaphthalene and its isomeric mixture fusible at 115 ° C, 2,4-dinitroanisole (DNAN).
  • the fusible portion will advantageously be between 30% and 40% of the total mass of the composition.
  • the solid part can thus associate:
  • FIG. 1 is a grain photograph of ONTA type 1 (bulk density greater than 0.95 g / cm 3), and
  • FIG. 2 is a grain photograph of ONTA type 2 (bulk density less than 0.95 g / cm 3).
  • the inventors have however chosen a larger particle size (thus a priori less suitable) because its association with the 200 to 400 micrometer particle size cut for ONTA leads to a lower porosity for the ONTA / RDX / Aluminum granular mixture and also for the composition. explosive which is then performed after casting TNT.
  • ONTA type 1 is an ONTA with rounded, spheroidal grains with relatively few surface irregularities.
  • ONTA type 2 is an ONTA whose grains are of more irregular outer shape.
  • Figure 1 shows a grain photograph of a type 1 ONTA.
  • Figure 2 shows a grain photograph of a type 2 ONTA. These photographs were taken under a scanning electron microscope.
  • This apparent density differs from the true density which is that of the material itself and which differs practically not from one type of ONTA to another.
  • the true density of ONTA is of the order of 1.9 g / cm3.
  • the apparent density b b of ONTA Type I tested is greater than 0.95 g / cm 3 (depending on the samples tested, this apparent density was between 0.95 g / cm 3 and 1 g / cm 3).
  • the apparent density b b of ONTA Type 2 tested is between 0.75 g / cm3 and 0.85 g / cm3.
  • the inventors have therefore sought to combine particle size fractions of oxynitrotriazole (having the most rounded grains) and insensitive Hexogene which make it possible to reduce this porosity.
  • Cutting optimization granulometry and the choice of a ONTA with a high apparent density made it possible to obtain a compactness of the optimal granular phase.
  • the global mass of aluminum is conventionally comprised between 0 and 15% of the total composition, while the additives (phlegmatizer such as wax, combined with an emulsifier and possibly graphite) represent about 7% in mass of the composition produced.
  • An aluminum mass of at least 5% by weight is preferred, which makes it possible to further reduce the porosity with an aluminum having an average particle size of about 43 microns (Table 2).
  • This choice also makes it possible to increase the density of the composition as well as its thermal conductivity, which improves its resistance to the tests of slow or rapid heating.
  • the compositions thus differ only in the relative percentages of ONTA (type 1) 200-400 micrometers and insensitive RDX 315-800 micrometers.
  • the last two rows of the table show the performances of an insensitive composition without RDX and those of a non-insensitive composition combining TNT (50%) and non-insensitive RDX (50%).
  • the simulation tests for slow and fast heating are performed in accordance with the corresponding AFNOR standards.
  • the simulations are carried out with the experimental conditions applied during the actual tests (temperature ramps defined in the NFT 70-503 standard and heat flow ramps defined in the NFT 70-513 standard).
  • the percentages by mass being related to the total mass of the solid part.
  • TNT trinitrotoluene
  • the fusible portion combines a fusible explosive and a suitable phlegmatizer (such a wax) whose melting temperature will be chosen substantially equal to that of explosive (to plus or minus 2 ° C), the proportion of phlegmatizer should be chosen greater than 3% and preferably of the order of 25% of the mass of the fuse.
  • the mass of phlegmatizer will thus be from 7% to 10% by weight for a fusible portion mass of between 30% and 40% of the total mass of the composition.
  • the phlegmatizer is associated with one or more casting additives such as graphite and emulsifier.
  • This criterion is based on the calculation of the thermochemical properties of the various constituents of a composition and in particular the enthalpy and the number of gram atoms. It allows to express with a good degree of reliability the potential risk of thermal explosion.
  • the work has shown that for an explosive composition to be considered as not vulnerable to the main tests required by the standards (Afnor NFT 70510 to 70515 or UN tests 7d) i to 7k), the calculated CS should be less than 100. note that when this CS criterion is less than 100 the composition is still not vulnerable. When the CS criterion is greater than 120 the composition is always vulnerable.
  • This composition has a detonation velocity of 7250 m / s and a sensitivity criterion Cs of 115 Kcal 2 / mol. Its porosity is 0.3%.
  • Example 2 Table 3 line No. 2
  • This composition has a detonation velocity of 7090 m / s and a sensitivity criterion Cs of 108 Kcal 2 / mol. Its porosity is 0.3%.
  • This composition has a detonation velocity of 7177 m / s and a sensitivity criterion Cs of 112 Kcal 2 / mol. Its porosity is 0.4%.
  • This composition has a detonation velocity of 7075 m / s and a sensitivity criterion Cs of 106 Kcal 2 / mol. Its porosity is 0.4%.
  • the explosive composition according to the invention can be implemented for the loading of all types of projectiles and military heads. This composition can be used to load artillery shells or the bodies of bombs or missiles.
  • the solid part will then be incorporated in the fused part by homogenizing the mixture (in a tank equipped with a mixer).
  • the melting and mixing will be carried out under vacuum.
  • Casting in the ammunition body will also be performed under vacuum.
  • a casting equipment that can be used for such a vacuum casting is described by the patent FR2923005.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mold Materials And Core Materials (AREA)
EP10810766.5A 2009-12-23 2010-12-20 Schmelzbare/giessbare explosive zusammensetzung mit geringem schadenpotenzial Active EP2516355B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10810766T PL2516355T3 (pl) 2009-12-23 2010-12-20 Mało wrażliwe, odlewane kompozycje wybuchowe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0906239A FR2954308B1 (fr) 2009-12-23 2009-12-23 Composition explosive fusible/coulable et a vulnerabilite reduite
PCT/FR2010/000853 WO2011086246A1 (fr) 2009-12-23 2010-12-20 Composition explosive fusible/coulable et a vulnerabilite reduite

Publications (2)

Publication Number Publication Date
EP2516355A1 true EP2516355A1 (de) 2012-10-31
EP2516355B1 EP2516355B1 (de) 2017-08-23

Family

ID=42316164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10810766.5A Active EP2516355B1 (de) 2009-12-23 2010-12-20 Schmelzbare/giessbare explosive zusammensetzung mit geringem schadenpotenzial

Country Status (7)

Country Link
US (1) US9242906B2 (de)
EP (1) EP2516355B1 (de)
ES (1) ES2645933T3 (de)
FR (1) FR2954308B1 (de)
NO (1) NO2516355T3 (de)
PL (1) PL2516355T3 (de)
WO (1) WO2011086246A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2984885B1 (fr) * 2011-12-21 2014-07-04 Nexter Munitions Procede de fabrication de granules d'une composition explosive comprimable et materiau esplosif obtenu avec un tel procede
DE102020001794A1 (de) * 2020-03-18 2021-09-23 Diehl Defence Gmbh & Co. Kg Schmelzgießbare Sprengstoffwirkmasse
CN111948369B (zh) * 2020-07-23 2022-11-15 西安近代化学研究所 超临界法制备的钝化nto包覆质量测评方法
CN113378250B (zh) * 2021-04-23 2022-11-08 中国兵器装备集团自动化研究所有限公司 用于弹体熔铸炸药凝固成型的参数适配系统及生成方法
FR3123649A1 (fr) 2021-06-03 2022-12-09 Thales Composition explosive fusible/coulable et son procédè de fabrication
CN114577670A (zh) * 2021-12-23 2022-06-03 西安近代化学研究所 一种熔铸炸药熔态密度的测试方法
FR3141172A1 (fr) 2022-10-20 2024-04-26 Thales Procédé de fabrication d'une composition explosive fusible/coulable.

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DE2506883C1 (de) * 1975-02-19 1980-10-02 Messerschmitt Boelkow Blohm Verfahren zur Herstellung von Hochbrisanz-Sprengstofformkoerpern
US3994756A (en) * 1975-11-26 1976-11-30 The United States Of America As Represented By The Secretary Of The Army Castable composite explosive compositions containing a mixture of trinitrobenzene and trinitroxylene
FR2584066B1 (fr) * 1985-06-28 1987-08-07 Poudres & Explosifs Ste Nale Utilisation du 5-oxo 3-nitro, 1,2,4-triazole comme substance explosive et compositions pyrotechniques contenant du 5-oxo 3-nitro 1,2,4-triazole.
DE3605634A1 (de) * 1986-02-21 1987-08-27 Messerschmitt Boelkow Blohm Verfahren zur behandlung kristalliner sprengstoffe fuer hochleistungssprengladungen
DE3804397C1 (en) * 1988-02-12 1989-09-07 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De Process for producing compressed explosive charges
FR2677977A1 (fr) * 1991-06-21 1992-12-24 Giat Ind Sa Procede de fabrication d'une charge explosive de grande puissance et dispositif de mise en óoeuvre du procede.
FR2738562B1 (fr) * 1995-09-08 1997-10-03 Poudres & Explosifs Ste Nale Compositions explosives coulees-fondues
FR2750131B1 (fr) * 1996-06-19 1998-07-17 Giat Ind Sa Composition explosive fusionnable/coulable et a vulnerabilite reduite
DE19719073A1 (de) * 1997-05-06 1998-11-12 Diehl Stiftung & Co Unempfindliche, preßbare Sprengstoffmischung
US5996501A (en) * 1997-08-27 1999-12-07 The United States Of America As Represented By The Secretary Of The Air Force Blast and fragmentation enhancing explosive
US6884307B1 (en) * 2002-04-12 2005-04-26 Diehl Munitionssysteme Gmbh & Co. Kg Insensitive explosive molding powder, paste process
FR2886641A1 (fr) 2005-06-02 2006-12-08 Saint Louis Inst Particules d'explosif peu sensibles aux chocs et procede de traitement associe
FR2887544B1 (fr) 2005-06-02 2008-07-18 Saint Louis Inst Particules d'explosif peu sensibles aux chocs et procede de traitement associe
FR2917169B1 (fr) 2007-06-06 2009-09-11 Eurenco France Sa Procede de determination du caractere sensible ou insensible d'un hexogene.
FR2923005B1 (fr) 2007-10-29 2012-10-26 Nexter Munitions Procede de coulee d'un materiau explosif et dispositif de coulee mettant en oeuvre un tel procede
CN101849445B (zh) 2007-11-06 2012-11-21 三菱综合材料株式会社 陶瓷基板、陶瓷基板的制造方法和电源模块用基板的制造方法

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Also Published As

Publication number Publication date
FR2954308A1 (fr) 2011-06-24
EP2516355B1 (de) 2017-08-23
PL2516355T3 (pl) 2017-12-29
WO2011086246A1 (fr) 2011-07-21
FR2954308B1 (fr) 2012-02-24
NO2516355T3 (de) 2018-01-20
US20120305149A1 (en) 2012-12-06
US9242906B2 (en) 2016-01-26
ES2645933T3 (es) 2017-12-11

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