CN114315488A - High-reaction-pressure PTFE-Al-AP active material and preparation method thereof - Google Patents
High-reaction-pressure PTFE-Al-AP active material and preparation method thereof Download PDFInfo
- Publication number
- CN114315488A CN114315488A CN202111519740.2A CN202111519740A CN114315488A CN 114315488 A CN114315488 A CN 114315488A CN 202111519740 A CN202111519740 A CN 202111519740A CN 114315488 A CN114315488 A CN 114315488A
- Authority
- CN
- China
- Prior art keywords
- ptfe
- powder
- active material
- ball milling
- reaction pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Powder Metallurgy (AREA)
Abstract
The invention discloses a preparation method of a high reaction pressure PTFE-Al-AP active material, which comprises the following steps: ball milling and mixing powder; molding; and (4) vacuum sintering. The PTFE/Al active material is added with AP ammonium perchlorate as a strong oxidant, the AP can react with Al, the mass thermal value of the AP is far higher than that of a common TNT explosive, and the reaction product is AlCl3、N2And the boiling point is lower, so that the reaction temperature is not reduced and the reaction temperature is not condensed into a solid state, namely the reaction pressure is not reduced; meanwhile, a large amount of gas is generated by the heated decomposition of AP, so that the reaction pressure can be further increased, and the overpressure damage effect is improved.
Description
Technical Field
The invention relates to the technical field of energetic materials, in particular to a high-reaction-pressure PTFE-Al-AP active material and a preparation method thereof.
Background
The aluminum/polytetrafluoroethylene (Al/PTFE) active material is a novel metastable state energy-containing structural material with both mechanical property and energy release characteristic. The material takes PTFE as an oxidant and a binder, Al as a reducing agent and a reinforcing phase, under the condition of high-speed impact, the material can generate violent redox reaction without providing an oxidant from the outside, a large amount of heat is released, and meanwhile, a reaction product can be quickly gasified under the action of high temperature to generate overpressure. The material has the characteristics of both polymer and metal, has certain toughness and strength, and can produce kinetic energy penetration effect on the target to damage the target directly when the reaction fragment made of the material impacts the target. Different from the traditional steel fragment, the reaction fragment can initiate chemical reactions such as strong explosion, combustion and the like under the impact action and release a large amount of heat, thereby greatly improving the total energy value acting on a target.
However, the reaction product AlF generated during the reaction of PTFE and Al3The boiling point is 1272 ℃, the boiling point is too high, and the AlF is a reaction product along with the reduction of the reaction temperature3Can be converted into a solid state, directly leads to rapid reduction of reaction pressure, influences over-pressure damage effect, and is sometimes difficult to meet the requirement when being used for replacing explosive energetic materials.
Therefore, in combination with the above-mentioned technical problems, there is a need to provide a new technical solution.
Disclosure of Invention
The invention aims to provide a high-reaction-pressure PTFE-Al-AP active material with higher reaction product pressure and more excellent overpressure damage effect and a preparation method thereof.
In order to solve the technical problems, the invention provides a high reaction pressure PTFE-Al-AP active material and a preparation method thereof, and the specific technical scheme is as follows:
a preparation method of a high reaction pressure PTFE-Al-AP active material comprises the following steps:
ball milling and powder mixing: weighing PTFE, Al and AP powder, mixing, adding the mixed powder and hard alloy grinding balls into a ball milling tank, and fixing the ball milling tank on a ball mill for ball milling to obtain energy-containing powder;
molding: filling the energetic powder into a rubber mold, and pressing by adopting a cold isostatic pressing process to obtain an energetic material blank;
and (3) vacuum sintering: putting the energetic material blank into a heating furnace, vacuumizing the heating furnace, heating a hearth of the heating furnace, and preserving heat, and cooling the furnace to room temperature after the heat preservation time is reached to obtain the PTFE-Al-AP active material;
wherein, the mixed powder contains 50 to 60 weight percent of PTFE powder, 30 to 40 weight percent of Al powder and 5 to 20 weight percent of AP powder.
Preferably, the PTFE, Al and AP powders have a ratio of average particle size of 2:1: 4.
Preferably, the PTFE powder has an average particle size of 20 μm, the Al powder has an average particle size of 10 μm, and the AP powder has an average particle size of 40 μm.
Preferably, in the ball milling and powder mixing process, the weight of the hard alloy balls is 5 times of that of the mixed powder, the ball milling rotation speed is 100-.
Preferably, in the molding process, the pressure of the cold isostatic pressing process is 150-250MPa, and the dwell time is 15-25 min.
Preferably, in the vacuum sintering process, a vacuum pump is adopted to vacuumize the heating furnace, so that the vacuum degree in the hearth reaches 0.01 Pa.
Preferably, the heating rate of the hearth during heating is 50 ℃/h until the temperature in the hearth reaches 330 ℃; the heat preservation time is 2 h.
The high reaction pressure PTFE-Al-AP active material prepared by the method.
The PTFE-Al-AP active material with high reaction pressure and the preparation method thereof have the following beneficial effects:
the PTFE/Al active material is added with AP ammonium perchlorate as a strong oxidant, the AP can react with Al, the mass thermal value of the AP is far higher than that of a common TNT explosive, and the reaction product is AlCl3、N2The ignition and detonation agent has the advantages of low boiling point, no condensation to solid state due to reduction of reaction temperature, no reduction of reaction pressure, high sensitivity, good energy release characteristic, good ignition and detonation effect and strong chemical damage capability; simultaneously, the AP is heated and decomposed to generate a large amount of gasThe reaction pressure can be further increased, so that the pressure peak value of the energetic material is higher, and the overpressure damage effect is improved; the powder metallurgy process or the die pressing process is adopted, so that the preparation efficiency is higher, and the method has good industrial prospect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The following detailed description of embodiments of the invention is intended to be illustrative of the invention and is not to be construed as limiting the invention.
A preparation method of a high reaction pressure PTFE-Al-AP active material comprises the following steps:
ball milling and powder mixing: weighing PTFE, Al and AP powder, mixing, adding the mixed powder and hard alloy grinding balls into a ball milling tank, and fixing the ball milling tank on a ball mill for ball milling to obtain energy-containing powder;
molding: filling the energetic powder into a rubber mold, and pressing by adopting a cold isostatic pressing process to obtain an energetic material blank;
and (3) vacuum sintering: putting the energetic material blank into a heating furnace, vacuumizing the heating furnace, heating a hearth of the heating furnace, and preserving heat, and cooling the furnace to room temperature after the heat preservation time is reached to obtain the PTFE-Al-AP active material;
wherein, the content of PTFE powder in the mixed powder is 50-60 percent, the content of Al powder is 30-40 percent and the content of AP powder is 5-20 percent in parts by weight.
The ratio of the average particle diameters of PTFE, Al and AP powders was 2:1: 4.
The average particle size of the PTFE powder was 20 μm, the average particle size of the Al powder was 10 μm, and the average particle size of the AP powder was 40 μm.
In the process of ball milling and powder mixing, the weight of the hard alloy ball is 5 times of that of the mixed powder, the ball milling speed is 100-300r/min, and the ball milling time is 2-4 h.
In the forming process, the pressure of the cold isostatic pressing process is 150-250MPa, and the pressure maintaining time is 15-25 min.
In the vacuum sintering process, a vacuum pump is adopted to vacuumize the heating furnace, so that the vacuum degree in the hearth reaches 0.01 Pa.
The heating rate of the hearth during heating is 50 ℃/h until the temperature in the hearth reaches 330 ℃; the heat preservation time is 2 h.
The PTFE/Al active material is added with AP ammonium perchlorate as a strong oxidant, the AP can react with Al, the mass thermal value of the AP is far higher than that of a common TNT explosive, and the reaction product is AlCl3、N2The ignition and detonation agent has the advantages of low boiling point, no condensation to solid state due to reduction of reaction temperature, no reduction of reaction pressure, high sensitivity, good energy release characteristic, good ignition and detonation effect and strong chemical damage capability; meanwhile, a large amount of gas is generated by the heated decomposition of AP, so that the reaction pressure can be further increased, the pressure peak value of the energetic material is higher, and the overpressure damage effect is improved; the powder metallurgy process or the die pressing process is adopted, so that the preparation efficiency is higher, and the method has good industrial prospect.
Example 1
The embodiment provides a preparation method of a high reaction pressure PTFE-Al-AP active material, which comprises the following steps:
ball milling and powder mixing: weighing 56.25g of PTFE powder with the average particle size of 20 microns, 34.96g of Al powder with the average particle size of 10 microns and 8.79g of AP powder with the average particle size of 40 microns, mixing, adding the mixed powder and 500g of hard alloy grinding balls into a ball milling tank, fixing the ball milling tank on a ball mill, and carrying out ball milling to obtain energy-containing powder, wherein the rotating speed is 200r/min during ball milling, and the ball milling time is 3 hours;
molding: filling the energetic powder into a rubber mold, and pressing by adopting a cold isostatic pressing process with the pressure of 200MPa and the pressure maintaining time of 20min to obtain an energetic material blank;
and (3) vacuum sintering: and putting the energetic material blank into a heating furnace, vacuumizing the heating furnace until the vacuum degree reaches 0.01Pa, heating the hearth of the heating furnace to 330 ℃ at the heating rate of 50 ℃/h, preserving the heat for 2h, and cooling the furnace to room temperature after the heat preservation time is reached to obtain the 10% -PTFE-Al-AP active material.
Example 2
The embodiment provides a preparation method of a high reaction pressure PTFE-Al-AP active material, which comprises the following steps:
ball milling and powder mixing: weighing 50g of PTFE powder with the average particle size of 20 microns, 32.42g of Al powder with the average particle size of 10 microns and 17.58g of AP powder with the average particle size of 40 microns, mixing, adding the mixed powder and 500g of hard alloy grinding balls into a ball milling tank, fixing the ball milling tank on a ball mill, and carrying out ball milling to obtain energy-containing powder, wherein the rotating speed during ball milling is 200r/min, and the ball milling time is 3 hours;
molding: filling the energetic powder into a rubber mold, and pressing by adopting a cold isostatic pressing process with the pressure of 200MPa and the pressure maintaining time of 20min to obtain an energetic material blank;
and (3) vacuum sintering: and putting the energetic material blank into a heating furnace, vacuumizing the heating furnace until the vacuum degree reaches 0.01Pa, heating the hearth of the heating furnace to 330 ℃ at the heating rate of 50 ℃/h, preserving the heat for 2h, and cooling the furnace to room temperature after the heat preservation time is reached to obtain the 20% -PTFE-Al-AP active material. .
While embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and not to be construed as limiting the present invention, and that variations may be made in the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (8)
1. A preparation method of a high reaction pressure PTFE-Al-AP active material is characterized by comprising the following steps: the method comprises the following steps:
ball milling and powder mixing: weighing PTFE, Al and AP powder, mixing, adding the mixed powder and hard alloy grinding balls into a ball milling tank, and fixing the ball milling tank on a ball mill for ball milling to obtain energy-containing powder;
molding: filling the energetic powder into a rubber mold, and pressing by adopting a cold isostatic pressing process to obtain an energetic material blank;
and (3) vacuum sintering: putting the energetic material blank into a heating furnace, vacuumizing the heating furnace, heating a hearth of the heating furnace, and preserving heat, and cooling the furnace to room temperature after the heat preservation time is reached to obtain the PTFE-Al-AP active material;
wherein, the mixed powder contains 50 to 60 weight percent of PTFE powder, 30 to 40 weight percent of Al powder and 5 to 20 weight percent of AP powder.
2. The method of preparing a high reaction pressure PTFE-Al-AP active material of claim 1, wherein: the average particle size ratio of the PTFE, Al and AP powders is 2:1: 4.
3. The method of preparing a high reaction pressure PTFE-Al-AP active material of claim 2, wherein: the average particle size of the PTFE powder is 20 μm, the average particle size of the Al powder is 10 μm, and the average particle size of the AP powder is 40 μm.
4. The method of preparing a high reaction pressure PTFE-Al-AP active material of claim 3, wherein: in the ball milling and powder mixing process, the weight of the hard alloy ball is 5 times of that of the mixed powder, the ball milling rotating speed is 100-300r/min, and the ball milling time is 2-4 h.
5. The method of preparing a high reaction pressure PTFE-Al-AP active material of claim 4, wherein: in the molding process, the pressure of the cold isostatic pressing process is 150-250MPa, and the pressure maintaining time is 15-25 min.
6. The method of preparing a high reaction pressure PTFE-Al-AP active material of claim 5, wherein: in the vacuum sintering process, a vacuum pump is adopted to vacuumize the heating furnace, so that the vacuum degree in the hearth reaches 0.01 Pa.
7. The method of preparing a high reaction pressure PTFE-Al-AP active material of claim 6, wherein: the heating rate of the hearth during heating is 50 ℃/h until the temperature in the hearth reaches 330 ℃; the heat preservation time is 2 h.
8. A high reaction pressure PTFE-Al-AP active material prepared according to the method of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111519740.2A CN114315488A (en) | 2021-12-14 | 2021-12-14 | High-reaction-pressure PTFE-Al-AP active material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111519740.2A CN114315488A (en) | 2021-12-14 | 2021-12-14 | High-reaction-pressure PTFE-Al-AP active material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114315488A true CN114315488A (en) | 2022-04-12 |
Family
ID=81050594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111519740.2A Pending CN114315488A (en) | 2021-12-14 | 2021-12-14 | High-reaction-pressure PTFE-Al-AP active material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114315488A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114315492A (en) * | 2021-12-14 | 2022-04-12 | 泰州润骐防务科技有限公司 | PTFE-Al-La energetic structural material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393241A (en) * | 2020-04-20 | 2020-07-10 | 北京理工大学 | Al、Fe2O3PTFE nano composite energetic material and preparation method thereof |
| CN112125769A (en) * | 2020-09-25 | 2020-12-25 | 沈阳理工大学 | Preparation method of aluminum/polytetrafluoroethylene active energetic material |
| CN114315492A (en) * | 2021-12-14 | 2022-04-12 | 泰州润骐防务科技有限公司 | PTFE-Al-La energetic structural material and preparation method thereof |
| CN114315490A (en) * | 2021-12-20 | 2022-04-12 | 江苏润驰防务装备有限公司 | PTFE-Al-Ce energetic structural material and preparation method thereof |
-
2021
- 2021-12-14 CN CN202111519740.2A patent/CN114315488A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393241A (en) * | 2020-04-20 | 2020-07-10 | 北京理工大学 | Al、Fe2O3PTFE nano composite energetic material and preparation method thereof |
| CN112125769A (en) * | 2020-09-25 | 2020-12-25 | 沈阳理工大学 | Preparation method of aluminum/polytetrafluoroethylene active energetic material |
| CN114315492A (en) * | 2021-12-14 | 2022-04-12 | 泰州润骐防务科技有限公司 | PTFE-Al-La energetic structural material and preparation method thereof |
| CN114315490A (en) * | 2021-12-20 | 2022-04-12 | 江苏润驰防务装备有限公司 | PTFE-Al-Ce energetic structural material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| WANG J: "An effective way to enhance energy output and combustion characteristics of Al/PTFE", 《COMBUSTION AND FLAME》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114315492A (en) * | 2021-12-14 | 2022-04-12 | 泰州润骐防务科技有限公司 | PTFE-Al-La energetic structural material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110415845B (en) | High-uranium-density composite fuel pellet and preparation method thereof | |
| CN105348704A (en) | Preparation method of Al/W/PTFE energetic material | |
| CN101121972A (en) | Method for preparing Mo-Cu composite material | |
| CN114315490A (en) | PTFE-Al-Ce energetic structural material and preparation method thereof | |
| CN109082549B (en) | Preparation method of easy-reaction aluminum/tungsten active material | |
| CN114315488A (en) | High-reaction-pressure PTFE-Al-AP active material and preparation method thereof | |
| CN112080676A (en) | Flaky powder micro-laminated W-based composite material and preparation method thereof | |
| CN111101026A (en) | Preparation method of high-strength high-toughness aluminum-based composite material | |
| CN106854718A (en) | Structural material containing energy and its preparation method and application | |
| CN115819161B (en) | Preparation method of boron-based active material energetic micropellet | |
| CN103938005A (en) | Method for preparing ultra-fine grained titanium and titanium alloy from jet-milled titanium hydride powder | |
| CN113012834A (en) | Preparation method of uranium nitride composite uranium trisilicon two-fuel pellet | |
| CN114315492A (en) | PTFE-Al-La energetic structural material and preparation method thereof | |
| CN110983090B (en) | Sintering method of carbon-containing molybdenum alloy | |
| CN115404386B (en) | High-entropy alloy material with high hardness and low neutron absorption cross section and preparation method thereof | |
| CN113651659B (en) | Metal-based energetic fragment with impact reaction activity and preparation method thereof | |
| CN109554627A (en) | Graphene composite high speed tool steel | |
| CN109554628A (en) | The preparation method of graphene composite high speed tool steel | |
| CN114426751A (en) | PTFE-Al-P energetic structural material and preparation method thereof | |
| CN116768690B (en) | FEP-based multi-component energetic structural material with high reaction pressure and preparation method and application thereof | |
| CN116768687A (en) | High-sensitivity FEP-based energetic structural material and preparation method and application thereof | |
| CN112122608A (en) | Method for reducing oxygen and nitrogen content during sintering in powder injection molding process | |
| CN108118227A (en) | Nano-magnesium-based hydrogen storage material for high-energy solid battery and preparation method thereof | |
| CN108796323A (en) | A kind of MgLaNi bases environment-friendly materials | |
| CN115353395B (en) | Preparation of Ti 2 AlC/B 4 Method for C complex phase ceramic |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |