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A kind of preparation method of all-metal active material with powder packing structure

An active material and all-metal technology, which is applied in the field of all-metal active material preparation, can solve the problems of temperature sensitivity and lowering, and achieve the effect of realizing secondary deformation, simplifying the process and improving the reaction speed

Active Publication Date: 2019-05-21
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the above-mentioned existing preparation processes, and propose a method for preparing all-metal active materials with a powder stacked structure. The method of the present invention overcomes the problem that metal-based active materials are sensitive to temperature, and adopts low-temperature powder molding The method combined with jacketed cold rolling to prepare a crack-free all-metal active material sheet, through the multi-pass small deformation cold rolling process, the microstructure of the metal active material body is improved, the contact area of ​​the active components is increased, and the Ignition threshold temperature of active materials and enhanced combustion reaction rate

Method used

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  • A kind of preparation method of all-metal active material with powder packing structure
  • A kind of preparation method of all-metal active material with powder packing structure
  • A kind of preparation method of all-metal active material with powder packing structure

Examples

Experimental program
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Effect test

Embodiment 1

[0021] This embodiment relates to a method for preparing an all-metal active material with an Al-Ni binary system powder stacked structure, comprising the following steps: preparing an Al-Ni active material blank 1 by cold spraying; wherein the Al-Ni active material blank The size of body 1 is: 40mm×30mm×3mm (length×width×thickness); the molar ratio of Al and Ni components is 1:1; the particle size of the powder is 10-30μm.

[0022] Take the aluminum alloy cover plate 2 and the aluminum alloy base plate 4 provided with the groove 3; the size of the aluminum alloy cover plate 2 is: 40mm×30mm×4mm (length×width×thick); the size of the aluminum alloy base plate 4 is: 80mm×60mm×11mm (length×width×thick); the size of the groove 3 is: 40mm×30mm×7mm (length×width×depth); the cover plate 2 and the bottom plate 4 are both 6061 series aluminum alloy.

[0023] Place the Al-Ni active material green body 1 in the groove 3, then put the cover plate 2, and cooperate with the bottom plate 4 to...

Embodiment 2

[0026] The implementation method of this embodiment is the same as that of Example 1, except that the powder stacked structure all-metal active material green body is an Al-Ni-W ternary metal powder active material prepared by cold spray molding; The composition and mole fraction of the Al-Ni-W active material are: Al:Ni:W=2:2:1; the sheath material is 6063 series aluminum alloy.

[0027] The multi-pass continuous cold rolling process is adopted, the rolling speed is 200mm / s, and the deformation in each pass is 10%. A total of 6 passes of continuous rolling are carried out, and the thickness of the final rolled plate is 1.6mm. No heat treatment is done before and after each pass of rolling.

[0028]Implementation effect: after adding sheathing and rolling, the surface of the Al-Ni-W active material has no cracks and is of good quality, while the green body without sheathing is broken during the rolling process. The results of microstructure analysis show that the distribution...

Embodiment 3

[0030] The implementation method of this embodiment is the same as that of Example 1, the difference is that the powder stacked structure all-metal active material green body is an Al-Cu binary metal powder active material prepared by a powder explosion molding method; the Al- The composition and mole fraction of the Cu active material are: Al:Cu=1:1; the sheath material is pure copper.

[0031] The multi-pass continuous cold rolling process is adopted, the roll diameter is 250mm, the rolling speed is 400mm / s, and the deformation per pass is 30%;

[0032] Implementation effect: similar to the result of Example 1, after the sheath rolling is adopted, there is no crack on the surface of the Al-Cu active material. The results of microstructure analysis show that Al and Cu particles have undergone severe plastic deformation, and the contact area between Al and Cu components per unit volume has increased by 50%, and there is no intermediate compound reaction between components duri...

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Abstract

The invention provides a preparation method of a powder accumulation structured all-metal active material. A coating cold rolling process is adopted to perform multi-pass continuous rolling on an active material blank, obtained through a powder molding method, to finally prepare the all-metal active material with higher energy release characteristics. The method can efficiently obtain massive all-metal active material. When the active material blank is further machined, a ladle is added to deform the active material blank with the powder accumulation structure under the constraint effect of three-way pressure stress, so that cracking caused by material brittleness in conventional deformation is prevented, the contact area among active components in unit volume is increased, and the combustion speed and the reaction efficiency of the active material are improved.

Description

technical field [0001] The invention relates to a method for preparing an all-metal active material with a powder stacked structure, and belongs to the technical field of all-metal active material preparation. Background technique [0002] Reactive materials generally refer to energetic materials composed of two or more non-explosive solid substances that can react with themselves or with air and release a large amount of chemical energy after ignition. Active materials usually have high energy density and reaction temperature, and have a wide range of applications in welding, material synthesis and military fields. Especially when used as an active fragment, it can release a large amount of energy and produce a strong explosion or combustion effect, greatly improving the ability of the warhead to damage the target. At present, active materials mainly include metal-metal type, thermite type and metal-polymer type. Among them, all-metal active materials not only have better...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/18
CPCB22F3/18
Inventor 谭成文赵慧林于晓东宁先进才鸿年
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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