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Metal whisker reinforced aluminum/polytetrafluoroethylene active material and preparation process thereof

A technology of polytetrafluoroethylene and polytetrafluoroethylene powder, which is applied in the field of metal whisker-reinforced aluminum/polytetrafluoroethylene active materials and its preparation process, can solve the problem of poor dynamic compression strength improvement effect and impact reaction energy release ability Problems such as decline and low practicality

Inactive Publication Date: 2020-12-29
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods for improving the dynamic compressive strength of aluminum / PTFE active materials in the prior art are relatively complicated, and it is often necessary to add a large amount of non-reactive substances to the aluminum / PTFE active materials through the enhancement means of component regulation, resulting in The impact reaction energy release ability of aluminum / polytetrafluoroethylene active materials decreases, and the effect of improving dynamic compressive strength is poor, and the practicability is low

Method used

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  • Metal whisker reinforced aluminum/polytetrafluoroethylene active material and preparation process thereof
  • Metal whisker reinforced aluminum/polytetrafluoroethylene active material and preparation process thereof

Examples

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Effect test

Embodiment 1

[0047] This embodiment provides a metal whisker-reinforced aluminum / polytetrafluoroethylene active material, which is prepared by the following steps:

[0048] Preparation of mixed raw materials: In a vacuum glove box, weigh 20g of aluminum powder with a particle size of 55nm, 55g of polytetrafluoroethylene powder with a particle size of 40μm, and 35g of zirconium whiskers with a diameter of 100μm and a length of 10mm, and then pass through YG- The mixer of 5KG model mixes 40min, obtains mixed raw material;

[0049] Powder pressing: In a vacuum glove box, put the above-mentioned mixed raw materials into a mold, then take out the mold from the vacuum glove box, put the mold in a press, pressurize to 100MPa at a pressurization rate of 20MPa / min, and keep the pressure 5min; then pressurize to 400MPa at a pressurization rate of 10MPa / min, hold the pressure for 5min, and obtain the powder column after the pressing is completed;

[0050] Finished product sintering: Take the above-m...

Embodiment 2

[0052] This embodiment provides a metal whisker-reinforced aluminum / polytetrafluoroethylene active material, which is prepared by the following steps:

[0053] Preparation of mixed raw materials: In a vacuum glove box, weigh 15g of aluminum powder with a particle size of 50nm, 50g of polytetrafluoroethylene powder with a particle size of 30μm, and 30g of zirconium whiskers with a diameter of 80μm and a length of 8mm, and then pass through YG- The mixer of 5KG model mixes 20min, obtains mixed raw material;

[0054] Powder pressing: In a vacuum glove box, put the above mixed raw materials into a mold, then take out the mold from the vacuum glove box, put the mold in a press, pressurize to 100MPa at a pressurization rate of 10MPa / min, and keep the pressure 1min; pressurize to 400MPa at a pressurization rate of 5MPa / min, hold the pressure for 1min, and obtain the powder column after pressing;

[0055] Finished product sintering: Take the above powder out of the mold, place it in ...

Embodiment 3

[0057] This embodiment provides a metal whisker-reinforced aluminum / polytetrafluoroethylene active material, which is prepared by the following steps:

[0058] Preparation of mixed raw materials: In a vacuum glove box, weigh 18g of aluminum powder with a particle size of 52nm, 52g of polytetrafluoroethylene powder with a particle size of 35μm, and 32g of zirconium whiskers with a diameter of 90μm and a length of 9mm, and then pass through YG- The mixer of 5KG model mixes 30min, obtains mixed raw material;

[0059] Powder pressing: In a vacuum glove box, put the above mixed raw materials into a mold, then take out the mold from the vacuum glove box, put the mold in a press, pressurize it to 100MPa at a pressurization rate of 15MPa / min, and keep the pressure 3min; pressurize to 400MPa at a pressurization rate of 7MPa / min, hold the pressure for 3min, and obtain the powder column after the pressing is completed;

[0060] Finished product sintering: Take the above-mentioned powder...

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Abstract

The invention provides a metal whisker reinforced aluminum / polytetrafluoroethylene active material and a preparation process thereof, and relates to the technical field of energetic materials. The metal whisker reinforced aluminum / polytetrafluoroethylene active material comprises the following raw materials: aluminum powder, polytetrafluoroethylene powder and zirconium wire whiskers, wherein the zirconium wire whiskers are used as a filler to improve an aluminum / polytetrafluoroethylene active material, and the zirconium wire whiskers do not influence the impact reaction energy release capacityof the aluminum / polytetrafluoroethylene active material, and can improve the dynamic compression strength of the aluminum / polytetrafluoroethylene active material. The invention discloses a preparation process of a metal whisker reinforced aluminum / polytetrafluoroethylene active material. The preparation process comprises the following steps: preparing a mixed raw material, pressing a grain and sintering a finished product. According to the invention, the whole process flow is simple, the production cost is reduced, the production is easy, and the produced product is high in dynamic compression strength and high in practical value through experimental detection.

Description

technical field [0001] The invention relates to the technical field of energetic materials, in particular to a metal whisker-enhanced aluminum / polytetrafluoroethylene active material and a preparation process thereof. Background technique [0002] Aluminum / polytetrafluoroethylene active material is an energetic material that can undergo a strong deflagration reaction and release a large amount of energy under impact loads. Under normal conditions, it has similar stability characteristics to traditional propellant and explosive energetic materials, and has With higher density and mechanical strength, it can be used as a structural material to replace the warhead shell, shaped charge cover and other structures in ammunition, and it can also be used as an impact protection material. The unique energy release characteristics make it one of the most promising materials in the field of national defense. [0003] Aluminum / PTFE active materials are mainly used in detonation driving...

Claims

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Application Information

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IPC IPC(8): C06B23/00C06B21/00
CPCC06B21/0008C06B21/0033C06B21/0066C06B21/0075C06B23/00C06B23/001
Inventor 陈闯唐恩凌韩雅菲郭凯常孟周贺丽萍
Owner SHENYANG LIGONG UNIV
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