DE102006030678A1 - Blast effect charge - Google Patents

Abstract

It proposes a high-explosive blast charge of high power, consisting of red phosphorus, an explosive and a binder.

Description

The The present invention relates to a high explosive blast active charge.

conventional highly explosive (HE) blast active charges typically consist of Blends of explosives with metallic fuels such as Boron, silicon, aluminum, titanium, zirconium, magnesium or mixtures or metal-rich compounds or alloys of these metals.

An inherent disadvantage of using metals in both binary and uniform charges of this type is the fact that the combustion of metal particles is generally affected only insignificantly by the atmospheric pressure. This means that the pressure exponent ^{n is} only very small in Vielle's law r = a · p ⁿ . In addition, metals generally suffer from the defect that the oxide layers adhering to them prevent rapid burnout. In particular, the calorically so advantageous boron with a volume-related combustion enthalpy of 138 MJ / dm ³ due to the inherent B ₂ O ₃ layer does not participate fully in a reaction, be it in the detonation reaction zone or in the afterburning.

• – ein kleiner Druckexponent n der verwendeten Metalle und damit kaum Steigerung der Ausbrandgeschwindigkeit in geschlossenen Räumen, und
• – eine unvollständige Reaktion der Metalle aufgrund von Oxidschichten.

The problems of conventional metal-based blast charges are:

• A small pressure exponent n of the metals used and thus hardly any increase in the burnout rate in closed rooms, and
• An incomplete reaction of the metals due to oxide layers.

It is therefore an object of the present invention, a highly explosive Blast active charge, which the above-mentioned problems usual Blast funnels avoids. In particular, the blast active charge should have a higher power, i.e. a faster and as possible complete Burnout in closed rooms to reach.

These Task is solved by a blast active charge with the features of claim 1. Advantageous Embodiments and developments of the invention are the subject the dependent Claims.

The according to the present Invention proposed blast active charge consists of red phosphorus or a red phosphorus-containing compound, an explosive and a binder.

• – ein hoher Druckexponent n und damit ein beschleunigter Ausbrand in geschlossenen Räumen, und
• – eine hohe Flüchtigkeit des entstehenden Oxids und damit ein Beitrag zur Druck-Volumenarbeit.

The advantages of such, red phosphorus included blast charge are in particular

• A high pressure exponent n and thus an accelerated burnout in closed rooms, and
• - A high volatility of the resulting oxide and thus a contribution to the pressure-volume work.

The Blast active charge is thus highly explosive, burning faster and more complete as conventional Blast active charges based on metal and achieves a very high pressure volume work.

Of the Binder of the Blast active charge can optionally be an inert binder or an explosive, such as TNT or TATE.

The molecular P / O ratio the blast active charge can be both ≤ 2/5 as well as ≥ 2/5.

Above and other features and advantages of the invention will become apparent from the following description of a preferred, non-limiting embodiment better understandable.

The present invention solves the problems described at the beginning of conventional blast active charges based on metal through the use of red phosphorus.

Becomes red phosphorus under atmospheric pressure set on fire, Thus, a slow burning in the range of 0.1 mm / s. Sauersoff underpinned pyrotechnic Sets on the base of red phosphorus, on the other hand, provides burn rates of 1-2 mm / s. Become such sentences enclosed, so even after the lighting even an explosive Burning.

Mixtures of the system octogen (explosive of the empirical formula C ₄ H ₈ N ₈ O ₈ , cyclotetramethylenetetranitramine, also referred to as homocyclonites or HMX (High Melting Explosive)) / hydroxyl-terminated poly-butadiene (HTPB, use as fuel and binder) and red phosphorus (RP) provide detonation velocities in excess of those of pure HMX. For example, the HMX / HTPB / RP ternary system with the mixing ratio of 68/12/20 provides a detonation rate of about 11,100 m / s and a Chapman-Jouget pressure of not less than 55 GPa.

The Of course, invention is not limited only to blast active charges with the above ternary system HMX / HTPB / RP.

To the Example can be used as a binder instead of non-explosive and severely inflammatory HTPB also used an explosive such as TNT or TATE become.

Of Further, the molecular P / O ratio of the blast active charge depending on their composition both ≤ 2/5 and ≥ 2/5.

The Use of red phosphorus or red phosphorus-containing compounds in the blast active charge of the invention causes a high pressure exponent n in the aforementioned Vielle's Law, which results in accelerated burnout in confined spaces. Furthermore the resulting oxide is easily volatile in this case (e.g. from about 250 ° C), what a complete or at least almost complete Reaction of the active charge leads and at the same time contributes to the pressure volume work. As can be seen from the above description, the blast active charge is also a lower proportion of expensive nitramines such as HMX and the like required as with conventional Systems.

Claims (5)

Blast active charge, consisting of red phosphorus or a red phosphorus-containing compound, an explosive and a binder. Blast active charge according to claim 1, characterized in that that the binder is an inert binder. Blast active charge according to claim 1, characterized in that that the binder is an explosive. Blast active charge according to one of claims 1 to 3, characterized in that the molecular P / O ratio of Maximum load is 2/5. Blast active charge according to one of claims 1 to 3, characterized in that the molecular P / O ratio of Effective charge is minimum 2/5.