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Metal-based energetic fragment with impact reaction activity and preparation method thereof

A reactive, metal-based technology, applied in offensive equipment, explosives processing equipment, explosives, etc., can solve the problems of low bonding degree of oxidizing agent and reducing agent, non-concentrated reaction process, low actual heat release, etc., and achieve good penetration and pore expansion ability, improved impact reactivity, and improved contact area

Active Publication Date: 2021-11-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, in the aluminothermic reaction-type combustion-type energetic fragments, the reactant activity of the aluminothermic reaction is usually low and the degree of bonding between the oxidizing agent and the reducing agent is not high, and the reaction speed is often slow, the actual heat release is low, and the reaction process is not concentrated. This will have a direct impact on their ignition and combustion performance, making it difficult to become a real energetic material and apply it to energetic fragments for effective damage

Method used

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  • Metal-based energetic fragment with impact reaction activity and preparation method thereof
  • Metal-based energetic fragment with impact reaction activity and preparation method thereof
  • Metal-based energetic fragment with impact reaction activity and preparation method thereof

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preparation example Construction

[0037] According to the technical solution of the present invention, a specific method for preparing metal-based energetic fragments includes:

[0038] Step 1: Put the nickel powder in the dispersant solution, then add nano-aluminum to mix and dry, dry the mixed powder after drying, and then sieve to obtain the intermediate product of nano-aluminum powder coated micron nickel powder A;

[0039] Step 2: Fully shake and mix the obtained product A with metal oxide powder and microcrystalline wax;

[0040] Step 3: Add an organic solvent to the powder obtained after shaking in Step 2, perform wet ball milling, and then dry to obtain a metal oxide-coated product B;

[0041] Step 4: Molding the product B;

[0042] Step 5: Sintering the molded test piece to obtain the energetic fragment.

[0043] Among them, some preferred embodiments are:

[0044] The first step is to mix by mechanical stirring, and the stirring time is 2h-5h.

[0045] The time for dry ball milling in step 1 is ...

Embodiment 1

[0054] Metal-based energetic fragments were prepared by the following steps:

[0055] Weighing and stirring: place nickel powder with a particle size of 3 microns in an aqueous solution of sodium lauryl sulfate, add nano-aluminum powder according to the volume ratio of Al powder / Ni powder=3 / 7, stir for 2 hours, and then dry;

[0056] Dry grinding: add the dried mixed powder to the omnidirectional planetary ball mill, add nylon balls, the ball-to-material ratio is 4:1, and sieve after 5 hours of dry grinding to obtain nano-aluminum powder-coated micro-nickel powder;

[0057] Wet grinding: put the obtained powder in a vibrating sieve, add ferric oxide powder and microcrystalline wax in a mass ratio of 1:1:0.5 and shake for 3 hours, then put it in a planetary ball mill, add absolute ethanol, and wet grind Dry to obtain the final coated powder of ferric oxide;

[0058] Molding: put the above-mentioned powder in a cylindrical mold for compression, the pressure is 30MPa, the pressu...

Embodiment 2

[0062] Metal-based energetic fragments were prepared by the following steps:

[0063] Weighing and stirring: Put the nickel powder in the aqueous solution of sodium lauryl sulfate, add nano-aluminum according to the volume ratio of Al powder / Ni powder = 1:1, stir for 3 hours and then dry;

[0064]Dry milling: Add the dried mixed powder into the omnidirectional planetary ball mill, add nylon balls, the ball-to-material ratio is 6:1, dry mill for 8 hours and sieve to obtain nano-aluminum powder-coated micro-nickel powder;

[0065] Wet grinding: put the above obtained powder in a vibrating sieve, add appropriate amount of copper oxide powder and microcrystalline wax to shake for 4 hours according to the mass ratio of 1:0.8:0.3, then place it in a planetary ball mill, add 10% polyvinyl alcohol, Drying after wet grinding to obtain the final coating powder of copper oxide;

[0066] Molding: put the above-mentioned powder in a cylindrical mold for compression, the pressure is 30MPa,...

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Abstract

The invention discloses a metal-based energetic fragment with impact reaction activity and a preparation method of the metal-based energetic fragment. The preparation method comprises the following steps: obtaining mixed powder formed by coating micron nickel powder with nano aluminum powder; performing vibration mixing on the mixed powder, metal oxide powder and microcrystalline wax to obtain an intermediate mixture; adding an organic solvent into the intermediate mixture for wet ball milling, and then drying to obtain a precursor; and carrying out compression molding on the precursor, and then carrying out sintering treatment to obtain the energetic fragment. The obtained energetic fragment is high in strength and good in plasticity. Meanwhile, the energetic fragment has good penetration and chambering capacity, and the impact reaction activity is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of energetic materials, especially active fragment materials. Background technique [0002] When metal-based active shock-reactive materials are used as active fragments, they can be divided into explosive type and combustion type according to the mode of action. Among them, the explosive type energetic fragments are mainly composed of low-sensitivity high-energy mixed explosives that can produce explosive or semi-explosive effects under impact. Combustion-type energetic fragments can produce explosion-like or combustion-like reactions under impact loads, output heat energy and generate ultra-high temperatures, and have a good damage effect on aviation fuel, aircraft, and incoming missile electronic guidance equipment. [0003] Combustion-type metal-based energetic fragments can be further divided into anaerobic reaction type, oxygen equilibrium reaction type, and oxygen-enriched reaction type according to w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/00C06B21/00
CPCC06B33/00C06B21/0041
Inventor 束庆海石艳松吕席卷成丽荣赵帅王东旭邹浩明徐博林文萍吕罡
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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