CN117263759A - Preparation process of space type high-explosion-heat energy storage broken piece - Google Patents

Preparation process of space type high-explosion-heat energy storage broken piece Download PDF

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Publication number
CN117263759A
CN117263759A CN202210783727.6A CN202210783727A CN117263759A CN 117263759 A CN117263759 A CN 117263759A CN 202210783727 A CN202210783727 A CN 202210783727A CN 117263759 A CN117263759 A CN 117263759A
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China
Prior art keywords
energy storage
explosion
type high
space type
heat energy
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CN202210783727.6A
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Chinese (zh)
Inventor
束庆海
赵帅
李超
吕席卷
邹浩明
王东旭
蒋教平
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Beijing Institute of Technology BIT
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Beijing Institute of Technology BIT
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Priority to CN202210783727.6A priority Critical patent/CN117263759A/en
Publication of CN117263759A publication Critical patent/CN117263759A/en
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    • CCHEMISTRY; METALLURGY
    • C06EXPLOSIVES; MATCHES
    • C06BEXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B33/00Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
    • C06B33/02Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide with an organic non-explosive or an organic non-thermic component
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B22F1/102Metallic powder coated with organic material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02Compacting only
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10Sintering only
    • B22F3/1003Use of special medium during sintering, e.g. sintering aid
    • B22F3/1007Atmosphere
    • CCHEMISTRY; METALLURGY
    • C06EXPLOSIVES; MATCHES
    • C06BEXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • CCHEMISTRY; METALLURGY
    • C06EXPLOSIVES; MATCHES
    • C06BEXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C06B21/0033Shaping the mixture
    • C06B21/0041Shaping the mixture by compression

Abstract

The invention relates to a preparation process of a space type high-heat-explosion energy storage fragment, which is characterized in that the coating of a fluoropolymer material on nano aluminum is more sufficient by a physical modification method on the basis of the fluoropolymer material, and the energy can be released at maximum efficiency. In addition, the high-explosion heat energy storage structural member is three-dimensionally filled on the basis of the active fragments. The energy storage structure is introduced, so that the damage area is greatly increased when the target object is impacted, and the stealth material is greatly damaged. The introduction of the high-heat-explosion material improves the energy release efficiency of the energy storage structural member with the enlarged damage area. The energy storage structural members are three-dimensionally distributed in the broken piece in a double-cone mode, so that the damage angle is more comprehensive, and the damage area is further improved. In summary, a space type high-explosion heat energy storage broken piece plays a very important role in the field of efficient damage.

Description

Preparation process of space type high-explosion-heat energy storage broken piece
Technical Field
The invention relates to a preparation process of a space type high-heat-explosion energy storage broken sheet, and belongs to the field of energy-containing materials and active broken sheets.
Background
Fluoropolymer-based active materials are a very important metastable structure. By means of the detonation-like effect, the target is hit, and in addition to kinetic energy penetration, the detonation-like detonation effect also has high-temperature and overpressure effects, so that the target is damaged to a great extent. The energy storage broken piece is a further innovation of the fluoropolymer active material. The energy storage spiral structural member is filled in the broken piece. Under the action of the launching and flying overload forces, the damaged units in the weak constraint state can be subjected to structural damage to release energy storage fragments, and the energy storage fragments have excellent damage effects on thin shell structures such as thin aluminum plates, fiber reinforced resins, aluminum oxide ceramics, glass ceramics, quartz ceramics, ceramic matrix composite materials and the like.
In recent years, a series of fluoropolymer-based active fragments have been developed by research and development teams, beginning at the university of Beijing. The fluoropolymer matrix active material has excellent comprehensive performance and is widely focused by scientific researchers. So far, there have been team initiated studies of energy storage fragmentation. On the basis of single energy storage broken pieces, the damage power of the broken pieces is further enlarged, and the method is a significant subject.
Disclosure of Invention
The invention aims to further improve the damage capability of the current active fragment, and belongs to the field of special damage technology research.
The preparation of the energy storage structural member introduces substances such as ferric oxide, copper oxide and the like on the basis of the original basic formula, so that the energy storage structural member has a larger bursting effect during penetration and destruction. The core-shell type nano aluminum/fluoropolymer energetic material is adopted, and the preparation steps can be generally summarized into surface functionalization, liquid fluororubber coating and a large amount of polytetrafluoroethylene coating. Polytetrafluoroethylene is hardly dissolved at normal temperature and normal pressure, and fluororubber can be dissolved in organic acetone at normal temperature and normal pressure. The method provides a good idea for us, and the polytetrafluoroethylene and the aluminum particle are well mixed and coated through the transition of the fluororubber. And the space type high-explosion-heat energy storage broken piece is obtained through filling, press fitting, sintering and other processes.
Advantageous effects
1. A preparation process of a space type high-explosion heat energy storage broken sheet is characterized by having both high explosion heat effect and large damage area damage effect. Is characterized in that the adopted material is a fluoropolymer-based active material, has high activity, low sensitivity and high safety performance, and can meet various processing requirements of people. The nano aluminum/fluorine polymer material with the core-shell structure is obtained by a physical coating method, and the operation is simple and easy to implement.
2. In the formula of the energy storage material, a high-heat explosion synergistic agent with a certain proportion is introduced, so that the damage capability of a single energy storage structural member is improved. The inside of the broken piece is spatially filled in the broken piece in a three-dimensional mode with a double-cone structure, so that the damage effect is greatly improved.
Drawings
FIG. 1 is a schematic diagram of an energy storage structure of the present invention;
FIG. 2 core-shell mechanism nanoaluminum morphology;
FIG. 3 is a schematic diagram of an energy storage fragment of the present invention;
FIG. 4 is a photograph of the composite damage effect of a spatial high-heat-burst energy-storage fragment prepared by the invention, impacting a LY12 aluminum plate with a thickness of 2mm at an initial speed of 1000 m/s;
Detailed Description
The invention will be further described with reference to specific examples and figures.
Example 1
A preparation method of a space type high-explosion heat energy storage broken sheet comprises the following specific steps:
the specific formula of the raw materials is as follows,
c=0.08%, mn=2.00%, p=0.035%, s=0.015%, si=0.75%, cr=18.00%, ni=8.00%, n=0.10%, fe=41.02%, feo=30%. FeO is used as a high-explosion heat type synergist, so that a severe aluminothermic reaction occurs when a broken piece impacts a target, and a spiral piece inside the broken piece also has a certain degree of energy release effect. The final energy storage structural member not only plays a certain role in structure, but also has the effect of high-energy damage. The energy storage structural member is molded by adopting a general steel wire machining process, and raw materials are subjected to operations such as drying, coating treatment, heat treatment, wire drawing and the like, so that the spiral telescopic member is obtained.
(1) Preparation of core-shell structured nano aluminum/fluoropolymer material
The nano aluminum fluoride polymer material is obtained by adopting a method of coating aluminum particles with liquid fluorine polymer. Compared with a chemical coating method, the physical coating method is simple to operate and high in feasibility, and can realize large-scale production. Phosphoric acid 2-hydroxyethyl methacrylic acid (PAM) was added to cyclohexanone and the reaction was maintained under nitrogen atmosphere with stirring for 2 hours. Fluororubber was dispersed in the solution and stirred for 2h. Then dispersing the metal powder into the solution to finally obtain the slurry. Extruding and granulating the obtained slurry by a 2mm granulator, and drying the obtained granules at a drying temperature of 6 ℃ to obtain the fluoropolymer coated nano aluminum particles.
(2) Preparation of energy storage broken pieces
And adding the uniformly mixed granules and polytetrafluoroethylene powder into a special forming die according to a calculated mass ratio, and then reasonably assembling an energy storage structural member for pre-pressing. The telescopic spiral structural member is split-packed into a mould according to a head-to-head structure, and is pressed. The pressure is 30MPa, the pressurizing speed is 30N/s, the pressure maintaining time is 5min, the pressure releasing speed is 30N/s, and the energy storage fragments distributed in space are obtained after pressure releasing. Sintering is needed subsequently, the formed test piece after demolding is placed in a sintering furnace for sintering, argon atmosphere is used in the sintering process, the sintering temperature is 360 ℃, the sintering time is 2 hours, the temperature is kept at 327 ℃ for 2 hours, the temperature rising and reducing rates are 1 ℃/min, and the process is carried out along with furnace cooling, so that the preparation process of the space type high-explosion heat energy storage broken piece is obtained.
Example 2
A preparation method of a space type high-explosion heat energy storage broken sheet comprises the following specific steps:
the specific formula of the raw materials is as follows,
c=0.08%, mn=2.00%, p=0.035%, s=0.015%, si=0.75%, cr=18.00%, ni=8.00%, n=0.10%, fe= 36.02%, feo=35%. FeO is used as a high-explosion heat type synergist, so that a severe aluminothermic reaction occurs when a broken piece impacts a target, and a spiral piece inside the broken piece also has a certain degree of energy release effect. The final energy storage structural member not only plays a certain role in structure, but also has the effect of high-energy damage. The energy storage structural member is molded by adopting a general steel wire machining process, and raw materials are subjected to operations such as drying, coating treatment, heat treatment, wire drawing and the like, so that the spiral telescopic member is obtained.
(1) Preparation of core-shell structured nano aluminum/fluoropolymer material
The nano aluminum fluoride polymer material is obtained by adopting a method of coating aluminum particles with liquid fluorine polymer. Compared with a chemical coating method, the physical coating method is simple to operate and high in feasibility, and can realize large-scale production. Phosphoric acid 2-hydroxyethyl methacrylic acid (PAM) was added to cyclohexanone and the reaction was maintained under nitrogen atmosphere with stirring for 2 hours. Fluororubber was dispersed in the solution and stirred for 2h. The metal powder is then dispersed into the solution, eventually yielding a slurry. Extruding and granulating the obtained slurry by a 2mm granulator, and drying the obtained granules at a drying temperature of 6 ℃ to obtain the fluoropolymer coated nano aluminum particles.
(2) Preparation of energy storage broken pieces
Mixing powder: the mass ratio of each component is as follows: nano aluminum particles/polytetrafluoroethylene=30/70, namely, weighing 30g of aluminum powder and 70g of polytetrafluoroethylene powder, drying, placing in an omnibearing planetary ball mill, mixing for 2 hours at the rotating speed of 200rpm/min, and uniformly mixing;
and (3) mould pressing: adding the uniformly mixed powder into a special forming die according to the calculated mass for pre-pressing, wherein the pressure is 30MPa, the pressurizing rate is 30N/s, the pressure maintaining time is 5min, the pressure releasing rate is 30N/s, and demoulding is carried out after pressure releasing to obtain a preliminary energy storage broken piece;
sintering: and (3) placing the obtained energy storage broken piece in a sintering furnace for sintering, wherein argon atmosphere is used in the sintering process, the sintering temperature is 360 ℃, the sintering time is 2h, the temperature is kept for 2h in the cooling process at 327 ℃, the heating and cooling rates are 1 ℃/min, and the energy storage broken piece is cooled along with the furnace, so that the space three-dimensional packed high-explosion heat energy storage broken piece is obtained.
Example 3
A preparation method of a space type high-explosion heat energy storage broken sheet comprises the following specific steps:
the specific formula of the raw materials is as follows,
c=0.08%, mn=2.00%, p=0.035%, s=0.015%, si=0.75%, cr=18.00%, ni=8.00%, n=0.10%, fe= 31.02%, feo=40%. FeO is used as a high-explosion heat type synergist, so that a severe aluminothermic reaction occurs when a broken piece impacts a target, and a spiral piece inside the broken piece also has a certain degree of energy release effect. The final energy storage structural member not only plays a certain role in structure, but also has the effect of high-energy damage. The energy storage structural member is molded by adopting a general steel wire machining process, and raw materials are subjected to operations such as drying, coating treatment, heat treatment, wire drawing and the like, so that the spiral telescopic member is obtained.
(1) Preparation of core-shell structured nano aluminum/fluoropolymer material
The nano aluminum fluoride polymer material is obtained by adopting a method of coating aluminum particles with liquid fluorine polymer. Compared with a chemical coating method, the physical coating method is simple to operate and high in feasibility, and can realize large-scale production. Phosphoric acid 2-hydroxyethyl methacrylic acid (PAM) was added to cyclohexanone and the reaction was maintained under nitrogen atmosphere with stirring for 2 hours. Fluororubber was dispersed in the solution and stirred for 2h. The metal powder is then dispersed into the solution, eventually yielding a slurry. Extruding and granulating the obtained slurry by a 2mm granulator, and drying the obtained granules at a drying temperature of 6 ℃ to obtain the fluoropolymer coated nano aluminum particles.
(2) Preparation of energy storage broken pieces
And adding the uniformly mixed granules and polytetrafluoroethylene powder into a special forming die according to a calculated mass ratio, and then reasonably assembling an energy storage structural member for pre-pressing. The telescopic spiral structural member is split-packed into a mould according to a head-to-head structure, and is pressed. The pressure is 30MPa, the pressurizing speed is 30N/s, the pressure maintaining time is 5min, the pressure releasing speed is 30N/s, and the energy storage fragments distributed in space are obtained after pressure releasing. Sintering is needed subsequently, the formed test piece after demolding is placed in a sintering furnace for sintering, argon atmosphere is used in the sintering process, the sintering temperature is 360 ℃, the sintering time is 2 hours, the temperature is kept at 327 ℃ for 2 hours, the temperature rising and reducing rates are 1 ℃/min, and the process is carried out along with furnace cooling, so that the preparation process of the space type high-explosion heat energy storage broken piece is obtained.
And (3) the obtained energy storage broken piece is impacted on a LY12 aluminum plate with the thickness of 2mm at the initial speed of 1100m/s, so as to obtain a damage effect action diagram. The optimal working effect is the scheme of example 2. The density of the energy storage fragments prepared in this example was 4.558g/cm3. The active energetic structural member exhibits plasticity, and has a yield strength of 22.582MPa at quasi-static state, a reaction threshold of 4500/s, and a yield strength of 50.055MPa at 6500/s strain rate.

Claims (3)

1. A preparation process of a space type high-explosion heat energy storage broken piece is characterized by comprising the following steps of: the method comprises the following specific steps:
step one: the spiral telescopic component is obtained by reasonably proportioning the elements C, mn, P, S, si, cr, ni, N, fe, feO and the like, and performing operations such as drying, coating treatment, heat treatment, wire drawing and the like on raw materials.
Step two: the nano aluminum fluoride polymer material is obtained by adopting a method of coating aluminum particles with liquid fluorine polymer.
Step three: the evenly mixed granules and polytetrafluoroethylene powder are added into a special forming die according to the calculated mass ratio, and then the energy storage structural member is reasonably assembled for pre-pressing and sintering, so that the space type high-explosion-heat energy storage broken piece is obtained.
2. The process for preparing the space type high-explosion heat energy storage broken sheet according to claim 1, which is characterized by comprising the following steps: step one, preparing the spiral type telescopic member.
3. The process for preparing the space type high-explosion heat energy storage broken sheet according to claim 1, which is characterized by comprising the following steps: the nano aluminum fluoride polymer material is obtained by adopting a method of coating aluminum particles with liquid fluorine polymer. And filling the energy storage structural member into a forming die, filling the granules and polytetrafluoroethylene, and performing compression forming and sintering to obtain the space type high-explosion heat energy storage broken sheet.
CN202210783727.6A 2022-06-28 2022-06-28 Preparation process of space type high-explosion-heat energy storage broken piece Pending CN117263759A (en)

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CN117263759A true CN117263759A (en) 2023-12-22

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