EP1856007A1 - Multimodal explosive - Google Patents

Multimodal explosive

Info

Publication number
EP1856007A1
EP1856007A1 EP05728237A EP05728237A EP1856007A1 EP 1856007 A1 EP1856007 A1 EP 1856007A1 EP 05728237 A EP05728237 A EP 05728237A EP 05728237 A EP05728237 A EP 05728237A EP 1856007 A1 EP1856007 A1 EP 1856007A1
Authority
EP
European Patent Office
Prior art keywords
explosive
powder
microns
single crystal
silicon single
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.)
Withdrawn
Application number
EP05728237A
Other languages
German (de)
French (fr)
Inventor
Karl Rudolf
Heinz Hofmann
Dimitri Kovalev
Joachim Diehner
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.)
Diehl BGT Defence GmbH and Co KG
Original Assignee
Diehl BGT Defence GmbH and Co KG
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
Priority claimed from DE102005011535A external-priority patent/DE102005011535B4/en
Application filed by Diehl BGT Defence GmbH and Co KG filed Critical Diehl BGT Defence GmbH and Co KG
Publication of EP1856007A1 publication Critical patent/EP1856007A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B25/00—Compositions containing a nitrated organic compound
    • C06B25/34—Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
    • 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

Definitions

  • the invention relates to an explosive according to the preamble of claim 1.
  • nanostructured porous reactive substances consist of reactive bodies whose voids are in the size range of 1 to 1000 nm, which are provided with oxidizing agents.
  • the reactive substances consist of mutually independent, protective-layer-coated reactive ones
  • Particles There is also described a process for producing such reactive substances, wherein nm-sized fuel particles having 1 to 1000 nm-sized interstices, first by annealing at 20 to 1000 ° C in air or by chemical or electrochemical processes or by vapor deposition with a protective layer and then the interspaces are provided with an oxidizing agent.
  • the fuel particles provided with the protective layer and the oxidizing agent can be pressed into a reactive body.
  • the fuel particles may consist of silicon, boron, titanium or zirconium.
  • the invention has for its object to provide an explosive, especially for Blastladungen, of the aforementioned type, which has an improved blast behavior above and below water.
  • Silicon Single Crystal Powders also shows no signs of oxidation for years. This is true even when storing silicon nanopowders in ambient air. Silicon single crystal powders have almost the same heat of combustion and reactivity as pure aluminum powder, ie non-oxidized aluminum powder.
  • hydrogen-passivated silicon powder is a significantly more interesting additive than the aluminum powder used in secondary explosive mixtures, since an immediate co-reaction takes place in the detonation front as a result of the non-oxidized crystal surfaces of the silicon powder, which also extends into the after-reaction period with increasing crystal sizes. It is so with increasing crystal sizes a so-called sliding effect, d. H. achieved a temporal extension of the detonation pressure pulse. For example, with long-term stable d. H. unoxidized silicon powder having a particle size of about 1 .mu.m during the Explosengstoffumsetzu ⁇ g achieved an immediate significant contribution to the detonation front and when using a coarse grain of z. B. 350 microns achieved an additional post-reaction and thus a sliding effect.
  • the explosive according to the invention in particular for Blastladungen, which has a hydrogen-passivated addition of silicon powder to secondary explosives to increase performance, which is formed of silicon single crystal powder, for example, starting with a grain size of 350 microns (average) of the first particle size range of the silicon single crystal powder of silicon Single crystal powder may be formed, which has a grain size of about 1 micron - 8 microns, and it may be the second grain size range of the silicon single crystal powder at about 40 microns and in the third range of 200 to 500 microns, preferably from about 350 microns, namely after application only one Grain size range or a mixture of the aforementioned fractions.
  • the proportion of silicon single crystal powder may be 15-55 wt.%.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Silicon Compounds (AREA)

Abstract

Disclosed is a multimodal explosive, especially for blast charges, comprising a powder additive for increasing the power. Said powder additive is formed by a hydrogen-terminated monocrystalline silicon powder which is provided with at least one grain size range and has the advantage that no oxidation phenomenon occurs even after many years, and even when the explosive is stored in ambient air. Advantageously, the powder additive immediately reacts along with the explosive in the detonation front due to the non-oxidized crystal surfaces, said joint reaction lasting until the post-reaction period as the crystal sizes increase such that a different propellant force is obtained according to the additive used.

Description

Diehl BGT Defeπce GmbH & Co. KG, Alte Nußdorfer Straße 13, 88662 Überlingen Diehl BGT Defeπce GmbH & Co. KG, Alte Nussdorfer Strasse 13, 88662 Überlingen
Mehrmodaler SprengstoffMulti-modal explosive
Die Erfindung betrifft einen Sprengstoff gemäß dem Oberbegriff des Anspruches 1.The invention relates to an explosive according to the preamble of claim 1.
Bei Sprengstoffen insbesondere für Blastladungen werden bislang zur Leistungssteigerung, d. h. zur Steigerung der Druckwirkung, Aluminiumpulver als Pulverzusatz eingesetzt. Als Sprengstoff kommt z.B. RDX (= Hexogen) oder HMX (= Oktogen) zur Anwendung. Die theoretisch erzielbare Erhöhung des Detonationsdruckes infolge Wärmefreisetzung bei der Reaktion mit den großen Anteilen freigesetzter Kohlenstoffatome von beispielsweise RDX oder HMX ist bei Verwendung von Aluminiumpulver als Pulverzusatz nur in sehr seltenenFor explosives, especially for Blastladungen so far to increase performance, d. H. to increase the pressure effect, aluminum powder used as a powder additive. As an explosive comes e.g. RDX (= hexogen) or HMX (= octogen) for use. The theoretically achievable increase in the detonation pressure due to heat release in the reaction with the large proportions of released carbon atoms of, for example, RDX or HMX is only very rare when using aluminum powder as a powder additive
Fällen beobachtbar. Bei Verwendung von nichtoxidiertem Aluminiumpulver kann beispielsweise eine Erhöhung der Splittergeschwindigkeit um ca. 12 % beobachtet werden. Diese Erhöhung der Splittergeschwindigkeit geht jedoch innerhalb weniger Wochen verloren, da Reinaluminiumpulver an der Pulveroberfläche schnell eine Vielzahl Aluminiumoxidlagen aufbaut. Dabei können sich an der Aluminiumpulveroberfläche mehrere Tausend Lagen Aluminiumoxid bilden. Diese Oxidschicht besitzt eine hohe Schmelztemperatur und eine hohe Verschleißbeständigkeit, so dass eine Nachreaktion erst im Millisekundenbereicht stattfinden kann, und erst dann ein verbessertes Blastverhalten über und unter Wasser eintritt. Bisherige Untersuchungen haben jedoch ergeben, dass insgesamt nur ein verhältnismäßig geringer Anteil des Aluminiumpulvers zur Reaktion kommt. Dieser geringe zur Reaktion kommende Aluminiumpulveranteil liegt größenordnungsmäßig bei maximal 20 %.Cases observable. When using non-oxidized aluminum powder, for example, an increase in the fragmentation speed can be observed by about 12%. However, this increase in fragmentation speed is lost within a few weeks because pure aluminum powder on the powder surface quickly builds up a variety of alumina layers. In this case, several thousand layers of aluminum oxide can form on the aluminum powder surface. This oxide layer has a high melting temperature and a high resistance to wear, so that a post-reaction only in the Milliseconds can take place, and only then enters an improved blast behavior above and below water. However, previous studies have shown that overall only a relatively small proportion of the aluminum powder comes to the reaction. This small amount of aluminum powder that reacts is on the order of a maximum of 20%.
Aus der DE 102 04 895 A1 sind nanostrukturierte poröse Reaktivstoffe bekannt, die aus Reaktivkörpem bestehen, deren Hohlräume im Größenbereich von 1 bis 1000 nm liegen, die mit Oxidationsmitteln versehen sind. Die Reaktivstoffe bestehen aus voneinander unabhängigen, schutzschichtummantelten reaktivenFrom DE 102 04 895 A1 nanostructured porous reactive substances are known, which consist of reactive bodies whose voids are in the size range of 1 to 1000 nm, which are provided with oxidizing agents. The reactive substances consist of mutually independent, protective-layer-coated reactive ones
Partikeln. Dort wird außerdem ein Verfahren zur Herstellung solcher Reaktivstoffe beschrieben, wobei nm-große Brennstoffpartikel, die 1 bis 1000 nm-große Zwischenräumen aufweisen, zunächst durch Tempern bei 20 bis 1000 ° Celsius in Luft oder durch chemische oder elektrochemische Verfahren oder durch Aufdampfverfahren mit einer Schutzschicht und anschließend die Zwischenräume mit einem Oxydationsmittel versehen werden. Die mit der Schutzschicht und dem Oxidationsmittel versehenen Brennstoffpartikel können zu einem Reaktivkörper verpresst werden. Die Brennstoffpartikel können aus Silizium, Bor, Titan oder Zirkoπ bestehen.Particles. There is also described a process for producing such reactive substances, wherein nm-sized fuel particles having 1 to 1000 nm-sized interstices, first by annealing at 20 to 1000 ° C in air or by chemical or electrochemical processes or by vapor deposition with a protective layer and then the interspaces are provided with an oxidizing agent. The fuel particles provided with the protective layer and the oxidizing agent can be pressed into a reactive body. The fuel particles may consist of silicon, boron, titanium or zirconium.
Der Erfindung liegt die Aufgabe zugrunde, einen Sprengstoff, insbesondere für Blastladungen, der eingangs genannten Art zu schaffen, der über und unter Wasser ein verbessertes Blastverhalten besitzt.The invention has for its object to provide an explosive, especially for Blastladungen, of the aforementioned type, which has an improved blast behavior above and below water.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst. Bevorzugte Aus- bzw. Weiterbildungen des erfindungsgemäßen Sprengstoffes sind in den Unteransprüchen gekennzeichnet.This object is achieved by the features of claim 1. Preferred embodiments or further developments of the explosive according to the invention are characterized in the subclaims.
Im Zuge der Beschäftigung mit quasi reinem Silizium konnte überraschenderweise festgestellt werden, dass aufgrund ihrerIn the course of dealing with quasi-pure silicon could be surprisingly found that due to their
Oberflächeneigenschaften wasserstoffpassivierte Silizium-Einkristallpulver auch über Jahre hinweg keine Oxidationserscheinungen zeigt. Das gilt selbst bei der Lagerung von Silizium-Nanopulvern an Umgebungsluft. Silizium- Einkristallpulver besitzen nahezu die gleiche Verbrennungswärme und Reaktionsbereitschaft wie Reinaluminiumpulver, d.h. nichtoxidiertes Aluminiumpulver.Surface Properties Hydrogen Passivated Silicon Single Crystal Powders Also shows no signs of oxidation for years. This is true even when storing silicon nanopowders in ambient air. Silicon single crystal powders have almost the same heat of combustion and reactivity as pure aluminum powder, ie non-oxidized aluminum powder.
Bei Versuchen mit Oxidatoren zeigten Silizium-Nanokristalle ein sehr heftiges Reaktionsverhalten.In experiments with oxidizers, silicon nanocrystals showed a very violent reaction behavior.
Es hat sich gezeigt, dass wasserstoffpassiviertes Siliziumpulver ein wesentlich interessanterer Zusatzstoff ist als das bislang zur Anwendung gelangende Aluminiumpulver in Sekundärsprengstoffmischungen, da infolge der nichtoxidierten Kristalloberflächen des Siliziumpulvers eine sofortige Mitreaktion in der Detonationsfront erfolgt, die mit zunehmenden Kristallgrößen auch in den Nachreaktionszeitraum reicht. Es wird also mit zunehmenden Kristallgrößen eine sogenannte Schiebewirkung, d. h. eine zeitliche Verlängerung des Detonationsdruckimpulses erreicht. So wird beispielsweise mit langzeitstabilem d. h. nichtoxidiertem Siliziumpulver mit einer Korngröße von etwa 1 μm während der Sprengstoffumsetzuπg ein sofortiger deutlicher Beitrag zur Detonationsfront erzielt und bei der Verwendung eines Grobkorns von z. B. 350 μm eine zusätzliche Nachreaktion und somit eine Schiebewirkung erzielt.It has been shown that hydrogen-passivated silicon powder is a significantly more interesting additive than the aluminum powder used in secondary explosive mixtures, since an immediate co-reaction takes place in the detonation front as a result of the non-oxidized crystal surfaces of the silicon powder, which also extends into the after-reaction period with increasing crystal sizes. It is so with increasing crystal sizes a so-called sliding effect, d. H. achieved a temporal extension of the detonation pressure pulse. For example, with long-term stable d. H. unoxidized silicon powder having a particle size of about 1 .mu.m during the Explosengstoffumsetzuπg achieved an immediate significant contribution to the detonation front and when using a coarse grain of z. B. 350 microns achieved an additional post-reaction and thus a sliding effect.
Bei dem erfindungsgemäßen Sprengstoff, insbesondere für Blastladungen, der zur Leistungssteigerung einen wasserstoffpassivierten Siliziumpulverzusatz zu Sekundärsprengstoffen aufweist, der von Silizium-Einkristallpulver gebildet ist, kann beispielsweise bei beginnend mit einer Kornstufe von 350 μm (Mittelwert) der erste Korngrößenbereich des Silizium-Einkristallpulvers von Silizium- Einkristallpulver gebildet sein, das eine Korngrößer von etwa 1 μm - 8 μm besitzt, und es kann der zweite Korngrößenbereich des Silizium- Einkristallpulvers bei etwa 40 μm und im dritten Bereich von 200 bis 500 μm, vorzugsweise von ca. 350 μm, liegen und zwar nach Anwendung nur ein Korngrößenbereich oder auch ein Gemisch der vorgenannten Fraktionen. Der Anteil an Silizium-Einkristallpulver kann 15 - 55 Gew.% betragen.In the explosive according to the invention, in particular for Blastladungen, which has a hydrogen-passivated addition of silicon powder to secondary explosives to increase performance, which is formed of silicon single crystal powder, for example, starting with a grain size of 350 microns (average) of the first particle size range of the silicon single crystal powder of silicon Single crystal powder may be formed, which has a grain size of about 1 micron - 8 microns, and it may be the second grain size range of the silicon single crystal powder at about 40 microns and in the third range of 200 to 500 microns, preferably from about 350 microns, namely after application only one Grain size range or a mixture of the aforementioned fractions. The proportion of silicon single crystal powder may be 15-55 wt.%.
Die Anwendungsfälle mit bevorzugtem Einsatz derartiger Siliziumeinkristalle sind:The applications with preferred use of such silicon single crystals are:
• Sehr schnelle Mitreaktion von 1 - 8 μm für erhöhte Metallbeschleunigungsfähigkeit.• Very fast co-reaction of 1 - 8 μm for increased metal acceleration capability.
• Verlängerte Druckbeaufschlagung bei ca. 40 μm bei Unterwasser- und schiebender Anwendung.• Prolonged pressurization at approx. 40 μm for underwater and sliding application.
• Stark verlängerte Druckbeaufschlagung bei ca. 350 μm in nahezu oder ganz geschlossenen Bauten. • Prolonged pressurization at approx. 350 μm in almost or completely closed buildings.

Claims

Diehl BGT Defeπce GmbH & Co. KG, Alte Nußdorfer Straße 13, 88662 ÜberlingenAnsprüche Diehl BGT Defeπce GmbH & Co. KG, Alte Nussdorfer Strasse 13, 88662 Überlingen claims
1. Mehrmodaler Sprengstoff, insbesondere für Blastladungen, der zur Leistungssteigerung von Sekundärsprengstoffen einen Pulverzusatz aufweist, dadurch gekennzeichnet, dass der Pulverzusatz von einem wasserstoffterminierten Silizium-1. Multi-modal explosive, in particular for blast charges, which has a powder additive to increase the performance of secondary explosives, characterized in that the added powder of a hydrogen-terminated silicon
Einkristallpulver mindestens eines oder mehreren Korngrößenbereiches des mehrmodalen Sprengstoffes gebildet ist.Single crystal powder is formed at least one or more particle size range of the multimodal explosive.
2. Sprengstoff nach Anspruch 1 , dadurch gekennzeichnet, dass ein erster Korngrößenbereich des Silizium-Einkristallpulvers von Siliziumpulver 1 μm bis 8 μm gebildet ist.2. explosive according to claim 1, characterized in that a first grain size range of the silicon single crystal powder of silicon powder is formed 1 micron to 8 microns.
3. Sprengstoff nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Silizium-Einkristallpulver eine Korngröße von 20 μm bis 50 μm, vorzugsweise 40 μm besitzt. 3. explosive according to claim 1 or 2, characterized in that the silicon single crystal powder has a particle size of 20 microns to 50 microns, preferably 40 microns.
4. Sprengstoff nach Anspruch 1 , dadurch gekennzeichnet, dass ein dritter Korngrößenbereich des Silizium-Einkristallpulvers eine Korngröße im Bereich von 200 bis 500 μm, vorzugsweise von ca.350 μm, besitzt.4. explosive according to claim 1, characterized in that a third particle size range of the silicon single crystal powder has a particle size in the range of 200 to 500 microns, preferably of about 350 microns.
5. Sprengstoff nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Gewichtsanteil des Silizium-Einkristallpulvers 15 - 55 Gew.% beträgt. 5. explosive according to one of claims 1 to 4, characterized in that the weight fraction of the silicon single crystal powder 15 - 55 wt.% Is.
EP05728237A 2005-03-10 2005-03-18 Multimodal explosive Withdrawn EP1856007A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005011535A DE102005011535B4 (en) 2004-03-10 2005-03-10 Multi-modal explosive
PCT/EP2005/002902 WO2006094531A1 (en) 2005-03-10 2005-03-18 Multimodal explosive

Publications (1)

Publication Number Publication Date
EP1856007A1 true EP1856007A1 (en) 2007-11-21

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EP05728237A Withdrawn EP1856007A1 (en) 2005-03-10 2005-03-18 Multimodal explosive

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US (1) US7985308B2 (en)
EP (1) EP1856007A1 (en)
NO (1) NO20074851L (en)
WO (1) WO2006094531A1 (en)

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EP2659963A4 (en) 2010-12-31 2014-09-03 Ero De La Cal Antonio Madro Storage of hydrogen and other gases in solid absorbent materials treated with ionizing radiation
US20220073356A1 (en) * 2017-01-25 2022-03-10 The George Washington University Low temperature, high yield synthesis of hydrogen terminated highly porous amorphous silicon, and nanomaterials and composites from zintl phases

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Also Published As

Publication number Publication date
US20080178974A1 (en) 2008-07-31
US7985308B2 (en) 2011-07-26
NO20074851L (en) 2007-10-04
WO2006094531A1 (en) 2006-09-14

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