Spherical atomized aluminum-zinc amorphous alloy powder with high physical activity and preparation method thereof

An amorphous alloy and physical technology, which is applied in the field of high physical activity spherical atomized aluminum-zinc amorphous alloy powder and its preparation, can solve the problems of poor processability, low activity of aluminum particles, and difficulty in realizing the energy release rate of energetic materials.

Active Publication Date: 2018-06-29
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-sized aluminum particles have low activity, are easy to spontaneously agglomerate into large particles, and are poor in manufacturability when combined with energetic materials, making it difficult to improve the energy release rate of energetic materials.

Method used

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  • Spherical atomized aluminum-zinc amorphous alloy powder with high physical activity and preparation method thereof
  • Spherical atomized aluminum-zinc amorphous alloy powder with high physical activity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Prepare aluminum-zinc (90-10) alloy powder as follows:

[0035] (1) After putting the aluminum ingot and the zinc ingot into two pre-melting furnaces to evacuate respectively, use high-temperature inert gas to purge to remove the gas containing oxidizing atmosphere adsorbed on the surface;

[0036] (2) Use the intermediate frequency heating ring to heat the furnace body, the furnace body containing aluminum ingots is heated to 680 ° C, the furnace body containing zinc ingots is heated to 450 ° C, and protected by argon;

[0037] (3) Pass the liquid aluminum and liquid zinc into the disc atomizer in the atomization furnace, and realize the mass ratio of 90:10 by controlling the respective flow rates. Aluminum liquid and zinc liquid are mixed evenly on the disc atomizer, and are sprayed into small droplets after mixing. The frequency of the atomizer is controlled at 55Hz, and the size of the metal droplets is controlled by controlling the centrifuge speed and other parame...

Embodiment 2

[0041] Prepare aluminum-zinc (80-20) alloy powder as follows:

[0042] (1) After putting the aluminum ingot and the zinc ingot into two pre-melting furnaces to evacuate respectively, use high-temperature inert gas to purge to remove the gas containing oxidizing atmosphere adsorbed on the surface;

[0043](2) Use the intermediate frequency heating ring to heat the furnace body, the furnace body containing aluminum ingots is heated to 680 ° C, the furnace body containing zinc ingots is heated to 450 ° C, and protected by argon;

[0044] (3) Pass the liquid aluminum and liquid zinc into the disc atomizer in the atomization furnace, and realize the mass ratio of 80:20 by controlling the respective flow rates. Aluminum liquid and zinc liquid are mixed evenly on the disc atomizer, and are sprayed into small droplets after mixing. The frequency of the atomizer is controlled at 55Hz, and the size of the metal droplets is controlled by controlling the centrifuge speed and other paramet...

Embodiment 3

[0048] Prepare aluminum-zinc (70-30) alloy powder as follows:

[0049] (1) After putting the aluminum ingot and the zinc ingot into two pre-melting furnaces to evacuate respectively, use high-temperature inert gas to purge to remove the gas containing oxidizing atmosphere adsorbed on the surface;

[0050] (2) Use the intermediate frequency heating ring to heat the furnace body, the furnace body containing aluminum ingots is heated to 680 ° C, the furnace body containing zinc ingots is heated to 450 ° C, and protected by argon;

[0051] (3) Pass the liquid aluminum and liquid zinc into the disc atomizer in the atomization furnace, and realize the mass ratio of 70:30 by controlling the respective flow rates. Aluminum liquid and zinc liquid are mixed evenly on the disc atomizer, and are sprayed into small droplets after mixing. The frequency of the atomizer is controlled at 55Hz, and the size of the metal droplets is controlled by controlling the centrifuge speed and other parame...

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Abstract

The invention discloses spherical atomized aluminum-zinc amorphous alloy powder and a preparation method thereof. An aluminum particle undergoing thermal self-explosion and becoming a particle with ananoscale during combustion is designed and prepared, the combustion rate of the aluminum particle is increased, and thus the energy release rates of aluminiferous explosives, pyrotechnic compositionsand other objects are greatly increased. The melting points and the boiling points of two types of metal differ greatly, the metal separates in the melting processes of the metal under the high-temperature impact, the metal with low melting points is melted and gasified first, under the effect of thermal expansion, alloy particles expand and burst, and finer particles are formed. Even the metal with low boiling points is gasified when reaching the boiling point temperature, more violent burst is realized under the action of gas expansion, and finer particles are formed. Zinc and aluminum aresubjected to amorphous alloying, an amorphous alloy particle realizes thermal self-explosion in the ignition process by using the melting and boiling points of zinc and melting and gasification characteristics, the gasification rate of the amorphous alloy particle is increased, and thus the combustion efficiency of the amorphous alloy particle is improved.

Description

technical field [0001] The invention belongs to the technical field of metal alloy powder preparation, and in particular relates to a spherical atomized aluminum-zinc amorphous alloy powder with high physical activity and a preparation method thereof. Background technique [0002] Aluminum is widely used as a combustible agent in energetic material systems due to its high energy density and fast oxidation rate. In the energetic material system, aluminum particles react in gas phase with water, carbon dioxide, oxygen, etc. in the combustion products of energetic materials. Therefore, the reaction rate depends on the gasification rate of aluminum particles. Since the gasification of aluminum particles is surface gasification, the burning rate of aluminum powder mainly depends on the size of aluminum particles. To increase the burning rate, the size of the aluminum particles must be reduced. However, nano-sized aluminum particles have low activity, are easy to spontaneously a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/10C22C45/08
CPCC22C45/08B22F9/10B22F2201/11B22F1/065
Inventor 焦清介闫石郭学永杜风贞刘大志
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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