CN109047771A - The device and method of explosive sintering technique preparation nanometer aluminum pipe - Google Patents
The device and method of explosive sintering technique preparation nanometer aluminum pipe Download PDFInfo
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- CN109047771A CN109047771A CN201810886295.5A CN201810886295A CN109047771A CN 109047771 A CN109047771 A CN 109047771A CN 201810886295 A CN201810886295 A CN 201810886295A CN 109047771 A CN109047771 A CN 109047771A
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- pedestal
- explosive
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- pipe
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/1208—Containers or coating used therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
Abstract
The present invention provides a kind of device and methods of explosive sintering preparation nanometer aluminum pipe.The device includes upper end plug, jacket, strike pipe, outer tube, central axis and pedestal；Wherein, pedestal is equipped with pressure relief, which is that the top of pedestal is equipped with the annular groove for gas in compressing powder, and is successively arranged pressure release piece and gasket at the top of pedestal；The top of upper end plug is set as the pyramidal structure that propagation of explosion is used for pressure stabilizing in the process.In the present invention can the device of pressure release type nanometer aluminum pipe explosive sintering product is made is that crystallite dimension reaches nanoscale aluminum pipe, centralized particle diameter, hardness and consistency are high；During the explosive sintering method preparation that the present invention uses, gas of the tagger in by compacting process between powder particle on pedestal ruptures when impacting, it is transmitted in the annular groove of pedestal by the centre bore of gasket, form high pressure gas, it powder can be effectively prevented sheds to be formed and shed hole, and it is simple process, at low cost, facilitate industrial production.
Description
Technical field
The present invention relates to powder explosion sintering equipments, and in particular to it is a kind of can pressure release type explosive sintering nanometer aluminum pipe dress
It sets.
Background technique
Explosive sintering alloy nano-powder is the Shock Wave that is generated using explosive detonation in powder surface, when extremely short
A kind of interior materials processing technology that high temperature hot melt, high pressure sintering formation occur in particle surface.With traditional hot pressed sintering and
The methods of HIP sintering is compared, and explosive sintering alloy nano-powder has the advantages that its uniqueness.(1) have it is voltage resistance, can
To be sintered out almost closely knit material.The sintered density in relation to amorphous cobalt-base alloys, crystallite aluminium and its alloy has been more than at present
99% theoretical density；(2) have molten rapid cooling fastly, be conducive to the excellent characteristics for keeping powder.Due to shock wave load it is instantaneous
Property, when explosive sintering particle from room temperature rise to melting temperature needed for the time it is extremely short, usually Microsecond grade, this is only limitted to temperature rise
Particle surface, and low-temperature condition is still maintained inside particle, cooling " quenching " will be played to interface after forming " sintering ", it is this
Mechanism can prevent crystal grain " growing up ", make it have the physical characteristic that crystal grain is small, is evenly distributed, therefore it can be kept in nanometer
The excellent characteristics of material under graininess, such as higher intensity, hardness, magnetic performance and corrosion resistance.
Currently, Chen Pengwan, Zhou Qiang et al. disclose a kind of point in the patent of invention of Patent No. 201210096266.1
Body formula high temperature preheating smashed district sintering equipment mainly removes this mode of gas in powder by high temperature preheating mode, but fills
It sets in warm, agglomeration may occur for powder particle, and to the grain structure of material, mechanical property has very big shadow
It rings.
Summary of the invention
The purpose of the present invention is to provide a kind of explosive sintering technique preparation nanometer aluminum pipe device and method, the device and
It is nanoscale high intensity aluminum pipe that method, which can prepare microstructure,.
It is as follows that technical solution is provided to achieve the purpose of the present invention:
A kind of device and method of explosive sintering technique preparation nanometer aluminum pipe, which includes upper end plug, jacket, strike
Pipe, central axis, outer tube, pressure release piece and pedestal；Upper end plug, jacket, strike pipe, central axis and pedestal are mutually fitted close,
Circular cylindrical closed container is formed, there are gaps between jacket and strike pipe, for the propagation of steady detonation wave, outer tube and beat
The gap hit between pipe is used to contain explosive, the fixed booster gains of outer tube top center and detonator, which is characterized in that should
The pedestal of device is equipped with pressure relief, wherein and the top center of pedestal is equipped with the annular groove for gas in compressing powder,
And pressure release piece, gasket are successively arranged at the top of pedestal；In addition, the top of upper end plug is set as the cone that propagation of explosion is used for pressure stabilizing in the process
Shape structure.
Further, jacket, strike pipe, upper end plug and pedestal are 45# steel, and central axis is magnesium bar, and outer tube is PVC work
Engineering plastics.
Specific step is as follows for the method for sintering nanometer aluminum pipe of the invention:
(a) jacket, strike pipe, central axis and pedestal are assembled, is put into togerther with nanometer aluminium powder and upper end plug full of guarantor
It protects in the closed glove box of atmosphere；
(b) it is uniformly added into nanometer aluminium powder in jacket, is compacted, and cover upper end plug；
(c) sintering equipment is taken out out of glove box；
(d) sintering equipment and outer tube are assembled, and low explosive is added wherein；
(e) starting detonator triggering powder column detonation low explosive, strike pipe hit jacket under explosive force effect, and compacting is received
Rice aluminium powder, obtains nanometer aluminum pipe；
(f) cutting strike pipe and jacket, obtain required nanometer aluminum pipe.
Further, in step (b), aluminium powder loads compactness and reaches 40%-60%.
The low explosive used in the present invention is powdery ammonium ladder detonator, and degree of packing is 0.9g/cm3.The powdery ammonium
The partial size of terraced explosive is between 1~2 μm.
Between 60~140nm, the crystallite dimension of sintered aluminum pipe mainly collects the size of aluminum particle in the present invention
In between 60~500nm, there is few portion crystal to be agglomerated into bulky grain.
Compared with prior art, the present invention its remarkable advantage:
(1) product of the invention is that crystallite dimension reaches nanoscale aluminum pipe, and particle diameter distribution is relatively narrow.
(2) present invention uses explosive sintering technology, and one-pass molding, industry is simple, and industrialized production may be implemented.
(3) the driving explosive that the present invention uses is AN-TNT containing explosive, cheap, from a wealth of sources.
(4) plug, jacket and the strike pipe structure that the present invention uses are simple, and using common stainless steel material, price is just
Suitable simultaneous processing is convenient.
Detailed description of the invention
Fig. 1 be the present invention can pressure release type nanometer aluminum pipe explosive sintering device structural schematic diagram.
Fig. 2 is the SEM figure of nanometer aluminium powder in the present invention.
Fig. 3 is the grain size distribution of nanometer aluminium powder in the present invention.
Fig. 4 is the pictorial diagram that aluminum pipe product is sintered in the present invention.
Fig. 5 is the metallographic microscope image of sintered bar product in the present invention.
Fig. 6 is the scanning electron microscope (SEM) photograph of sintered bar product in invention.
Wherein, 1, detonator；2, booster gains；3, low explosive；4, upper end plug；5, strike pipe；6, jacket；7, center
Axis；8, annular region；9, outer tube；10, pressure release piece；11, gasket；12, pedestal.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
The present invention is realized by following device:
It is a kind of can pressure release type nanometer aluminum pipe explosive sintering device, the device include upper end plug 4, jacket 6, strike pipe 5,
Central axis 7, outer tube 9, pressure release piece 10 and pedestal 12；Upper end plug 4, jacket 6, strike pipe 5, central axis 7 and pedestal 12 are mutual
It is fitted close, forms circular cylindrical closed container；There are gap between jacket 6 and strike pipe 5, the top of pedestal 12 corresponds to jacket
6 are equipped with the toroidal cavity for gas in compressing powder with 8 positions of annular region that central axis 7 is formed, 12 top of pedestal according to
It is secondary to be equipped with pressure release piece 10 and gasket 11；Gap between outer tube 9 and strike pipe 5 is used to contain explosive；Outer tube top center
The fixed booster gains 2 in position and detonator 1；In addition, the top of upper end plug 4 is set as the taper knot that propagation of explosion is used for pressure stabilizing in the process
Structure.
Wherein, upper end plug 4 is made of a circular cone and two cylindrical bodies, respectively diameter × high size are as follows: 60 ×
The circular cone of 30mm, diameter × high size are as follows: 56 × 10mm and diameter × high size are as follows: the cylindrical body of 41 × 10mm, plug lower end
Open cylindrical hole, diameter × high size are as follows: 10 × 10mm；Outer diameter × thickness of jacket 6 × high size are as follows: 45 × 2 × 160mm；
Hit outer diameter × thickness × high size of pipe 5 are as follows: 60 × 2 × 180mm；Outer diameter × internal diameter × thickness are as follows: 41 × 10 ×
0.2mm；Outer diameter × internal diameter × thickness of aperture gasket 11 are as follows: 41 × 10 × 1mm has 4 equidistant symmetrical circles on gasket
The distance of center circle device axle center distance in hole, circular hole is 12.75mm, Circularhole diameter 1mm；Pedestal 12 is made of two cylindrical bodies, diameter
× high size are as follows: 26 × 10mm and diameter × height are having a size of 41 × 10mm；Outer diameter × internal diameter of toroidal cavity 11 in pedestal 12
× high size are as follows: 31 × 20 × 12mm.Outer diameter × thickness of outer tube 9 × high size are as follows: 100 × 1.5 × 230mm.
It is taper at the top of upper end plug 4, to make detonation wave axially stable propagation, jacket 6 is to contain nanometer aluminium powder
Container, strike pipe 5 is one layer of steel pipe outside jacket 6, for transmitting the Propagation of detonation wave, and hits pipe 5 and jacket 6
Buffering detonation wave is then played the role of in gap, stablizes it and propagates, and stores explosive, the base of bottom between outer tube 9 and strike pipe 5
Seat 12 is used to fix jacket 6, strike pipe 5 and central axis 7, while completely cutting off air, and pedestal 12 opens ring-shaped hollow groove, and upper end is deposited
In aperture gasket and tagger, detonator 1 and powder column 2 are fixed on device top.It is driven using low explosive 4 and squeezes strike pipe 5,
Jacket 6 is impacted, stable axial impact wave extrusion friction nanometer aluminium powder is formed, it is made to sinter the aluminum pipe with nanostructure into,
Gas of the pressure release piece 9 in by compacting process between powder particle on pedestal 12 ruptures when impacting, and passes through the center of gasket 10
Hole is transmitted in the groove of pedestal, forms high pressure gas, shedding for powder can be effectively prevented.
Embodiment
The present invention uses the average particle size of nanometer aluminium powder for 100nm, the low explosive 3 used for powdery ammonium ladder detonator,
Its partial size is 1.5 μm, carries out preparation nanometer aluminum pipe in accordance with the following steps
(a) jacket 6, strike pipe 5, central axis 7 and pedestal 12 are assembled, is put into togerther with nanometer aluminium powder and upper end plug 4
In closed glove box full of protective atmosphere；
(b) it is uniformly added into about 250g nanometer aluminium powder in jacket 6, is compacted, aluminium powder loads compactness and reaches 40%-60%,
And cover upper end plug 4；
(c) explosive sintering device is taken out out of glove box；
(d) explosive sintering device and outer tube 9 are assembled, and manages interior addition low explosive 3 in outer tube 9, powder charge is close
Degree is 0.9g/cm3；
(e) starting detonator 1 triggers the detonation low explosive 3 of booster gains 2, and strike pipe 5 hits packet under explosive force effect
Set 6 is compacted nanometer aluminium powder, obtains nanometer aluminum pipe；
(f) cutting strike pipe 5 and jacket 6, and axle center is taken out, obtain required nanometer aluminum pipe.
The material object of nanometer aluminum pipe made from the present embodiment as shown in figure 4, the Vickers hardness of nanometer aluminum pipe is 120Kgf/mm2,
Its hardness has reached traditional industry and has prepared 4 times of aluminum pipe hardness or more, as shown in Figure 5, it can be seen that nanometer aluminum pipe obtained
Microstructure is uniform, as shown in fig. 6, the partial size of obtained nanometer aluminum pipe is within 200nm, consistency is higher.
Claims (10)
1. a kind of device of explosive sintering technique preparation nanometer aluminum pipe, which includes upper end plug (4), jacket (6), strike pipe
(5), outer tube (9), pressure release piece (10) and pedestal (12)；Upper end plug (4), jacket (6), strike pipe (5), central axis (7) and
Pedestal (12) is mutually fitted close, and forms the columnar closed container of annulus, there are gaps between jacket (6) and strike pipe (5), outside
Gap between casing (9) and strike pipe (5) is used to contain explosive, outer tube top center fixed booster gains (2) and
Detonator (1), which is characterized in that the top of upper end plug (4) is set as the pyramidal structure that propagation of explosion is used for pressure stabilizing in the process, the device
Pedestal (12) be equipped with pressure relief, wherein the top of pedestal (12) correspond to jacket (6) and central axis (7) formation annular
Region (8) position is equipped with the toroidal cavity for gas in compressing powder, and is successively arranged pressure release piece at the top of pedestal (12)
(10), gasket (11)；In addition, the lower section at upper end plug (4) center and the top at pedestal (12) center are equipped with and are used for fixed center
The groove of axis (7).
2. the device of explosive sintering technique preparation nanometer aluminum pipe according to claim 1, which is characterized in that the upper end
Plug (4) is made of a circular cone and two cylindrical bodies, respectively diameter × high size are as follows: the circular cone of 60 × 30mm, diameter ×
High size are as follows: 56 × 10mm and diameter × high size are as follows: the cylindrical body of 41 × 10mm；Cylindrical hole is opened in plug lower end, and diameter ×
High size are as follows: 10 × 10mm.
3. the device of explosive sintering technique preparation nanometer aluminum pipe according to claim 1, which is characterized in that jacket (6)
Outer diameter × thickness × high size are as follows: 45 × 2 × 160mm；Outer diameter × thickness × high size of strike pipe (5) are as follows: 60 × 2 ×
180mm；Outer diameter × thickness of outer tube (9) × high size are as follows: 100 × 1.5 × 230mm.
4. the device of explosive sintering technique preparation nanometer aluminum pipe according to claim 1, which is characterized in that pressure release piece (10)
Outer diameter × internal diameter × thickness are as follows: 41 × 10 × 0.2mm；Outer diameter × internal diameter × thickness of aperture gasket (11) are as follows:
41 × 10 × 1mm has 4 equidistant symmetrical circular holes on gasket, and the distance of center circle device axle center distance of circular hole is 12.75mm, circular hole
Diameter 1mm；Pedestal (12) is made of two cylindrical bodies, diameter × high size are as follows: 41 × 10mm and diameter × height having a size of 56 ×
10mm；Outer diameter × internal diameter of toroidal cavity in pedestal (12) × high size are as follows: 31 × 20 × 12mm.
5. the device of explosive sintering technique preparation nanometer aluminum pipe according to claim 1, which is characterized in that the jacket
(6), strike pipe (5), upper end plug (4) and pedestal (12) use 45# steel, and the central axis (7) uses magnesium bar, and described is outer
Casing (9) uses PVC engineering plastics.
6. a kind of nanometer aluminum pipe explosive sintering method based on claim 1-5 described device, which is characterized in that the nanometer
The step of aluminium powder sintering method, is specific as follows:
(a) jacket (6), strike pipe (5), central axis (7) and pedestal (12) are assembled, with nanometer aluminium powder and upper end plug (4) one
It rises and is put into the closed glove box full of protective atmosphere；
(b) nanometer aluminium powder being uniformly added into the circular cylindrical space between jacket (6) and central axis (7) and being compacted, aluminium powder is filled out
Dress compactness reaches 40%-60%, and covers upper end plug (4)；
(c) explosive sintering device is taken out out of glove box；
(d) explosive sintering device and outer tube (9) are assembled, and low explosive (3) is added in outer tube (9) are managed；
(e) starting detonator (1) triggering booster gains (2) detonation low explosive (3), strike pipe (5) are beaten under explosive force effect
It hits jacket (6), is compacted nanometer aluminium powder, obtain nanometer aluminum pipe；
(f) cutting strike pipe (5) and jacket (6), and magnesium bar is taken out, obtain required nanometer aluminum pipe.
7. according to the method described in claim 6, it is characterized in that, the low explosive (3) is powdery in step (d)
AN-TNT containing explosive, the degree of packing of the powdery ammonium ladder detonator are 0.9g/cm3。
8. the method according to the description of claim 7 is characterized in that the partial size of the powdery ammonium ladder detonator 1~2 μm it
Between.
9. according to the method described in claim 6, it is characterized in that, the size of the nanometer aluminium powder is between 60~140nm.
10. according to the method described in claim 6, it is characterized in that, the protective atmosphere in the glove box is argon gas.
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| CN201810886295.5A CN109047771A (en) | 2018-08-06 | 2018-08-06 | The device and method of explosive sintering technique preparation nanometer aluminum pipe |
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| CN201810886295.5A CN109047771A (en) | 2018-08-06 | 2018-08-06 | The device and method of explosive sintering technique preparation nanometer aluminum pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112222404A (en) * | 2020-10-16 | 2021-01-15 | 南京南理工三航纳米科技研究院有限公司 | Bidirectional pressure relief device and method for preparing metal nano aluminum bar based on explosive sintering process |
| CN115213406A (en) * | 2022-06-24 | 2022-10-21 | 中北大学 | Method for preparing refractory high-entropy alloy by explosive loading |
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| EP0734848A2 (en) * | 1995-03-02 | 1996-10-02 | Instituto Michanikis Ylikon Kai Geodomon A.E. | A method for safe transmission of steady or time-dependent pressure under high-low, steady or time-dependent temperature |
| CN101429596B (en) * | 2008-12-15 | 2010-09-22 | 哈尔滨工业大学 | Method of manufacturing nanocrystalline WC-Co hard alloy |
| CN103009662A (en) * | 2012-08-17 | 2013-04-03 | 成都易态科技有限公司 | Production line type assembling method of isostatic pressing filter element forming die |
| CN103614605A (en) * | 2013-09-29 | 2014-03-05 | 魏玲 | Novel high-pressure air compressor and low-pressure turbine blade material and preparation method thereof |
| CN107052331A (en) * | 2017-06-14 | 2017-08-18 | 南京理工大学 | Can pressure release type explosive sintering nanometer aluminium bar device and method |
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2018
- 2018-08-06 CN CN201810886295.5A patent/CN109047771A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0734848A2 (en) * | 1995-03-02 | 1996-10-02 | Instituto Michanikis Ylikon Kai Geodomon A.E. | A method for safe transmission of steady or time-dependent pressure under high-low, steady or time-dependent temperature |
| CN101429596B (en) * | 2008-12-15 | 2010-09-22 | 哈尔滨工业大学 | Method of manufacturing nanocrystalline WC-Co hard alloy |
| CN103009662A (en) * | 2012-08-17 | 2013-04-03 | 成都易态科技有限公司 | Production line type assembling method of isostatic pressing filter element forming die |
| CN103614605A (en) * | 2013-09-29 | 2014-03-05 | 魏玲 | Novel high-pressure air compressor and low-pressure turbine blade material and preparation method thereof |
| CN107052331A (en) * | 2017-06-14 | 2017-08-18 | 南京理工大学 | Can pressure release type explosive sintering nanometer aluminium bar device and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112222404A (en) * | 2020-10-16 | 2021-01-15 | 南京南理工三航纳米科技研究院有限公司 | Bidirectional pressure relief device and method for preparing metal nano aluminum bar based on explosive sintering process |
| CN115213406A (en) * | 2022-06-24 | 2022-10-21 | 中北大学 | Method for preparing refractory high-entropy alloy by explosive loading |
| CN115213406B (en) * | 2022-06-24 | 2024-02-27 | 中北大学 | Method for preparing refractory high-entropy alloy by explosive loading |
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Application publication date: 20181221 |