CN107052331A - Can pressure release type explosive sintering nanometer aluminium bar device and method - Google Patents
Can pressure release type explosive sintering nanometer aluminium bar device and method Download PDFInfo
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- CN107052331A CN107052331A CN201710448635.1A CN201710448635A CN107052331A CN 107052331 A CN107052331 A CN 107052331A CN 201710448635 A CN201710448635 A CN 201710448635A CN 107052331 A CN107052331 A CN 107052331A
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- pedestal
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- aluminium bar
- pressure release
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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
- B22F3/10—Sintering only
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- 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
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- Nanotechnology (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention provides it is a kind of can pressure release type nanometer aluminium bar explosive sintering device and method.The device includes upper end plug, jacket, strike pipe, outer tube and pedestal；Wherein, pedestal is provided with pressure relief, and the pressure relief is provided with for the top center of pedestal to be used to be sequentially provided with pressure release piece, pad at the top of the groove of gas in compressing powder, and pedestal；In addition, the top of upper end plug is set to be used for the pyramidal structure of voltage stabilizing during propagation of explosion.In the present invention can the device of pressure release type nanometer aluminium bar explosive sintering product is made is that crystallite dimension reaches nano level aluminium bar, particle diameter distribution is narrow, hardness and consistency high；During prepared by the explosive sintering method that the present invention is used, gas of the tagger between powder particle in by compacting process on pedestal ruptures when impacting, it is delivered to by the centre bore of pad in the groove of pedestal, form gases at high pressure, the generation of centre bore and shedding for powder can effectively be prevented, and technique is simple, cost is low, facilitates industrial production.
Description
Technical field
The present invention relates to powder explosion sintering equipment, and in particular to it is a kind of can pressure release type explosive sintering nanometer aluminium bar dress
Put.
Background technology
Explosive sintering alloy nano-powder be the Shock Wave produced using explosive detonation in powder surface, when extremely short
It is interior that a kind of materials processing technology of high temperature hot melt, high pressure sintering formation occurs in particle surface.With traditional hot pressed sintering and
The methods such as HIP sintering are compared, and explosive sintering alloy nano-powder has the advantages that its is unique.(1) possess voltage resistance, can
To sinter out almost closely knit material.The sintered density about amorphous cobalt-base alloys, crystallite aluminium and its alloy has exceeded at present
99% solid density；(2) possess molten rapid cooling soon, be conducive to keeping the excellent specific property of powder.Due to shock wave load it is instantaneous
Property, during explosive sintering particle from normal temperature rise to melting temperature needed for time it is extremely short, usually Microsecond grade, this is only limitted to temperature rise
Particle surface, and low-temperature condition is remained in that 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 can keep it in nanometer
The excellent specific property of material under graininess, such as higher intensity, hardness, magnetic performance and corrosion resistance.
At present, 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, but dress by high temperature preheating mode
Put in warm, agglomeration may occur for powder particle, to the grainiess of material, mechanical property has very big shadow
Ring.
The content of the invention
It is an object of the invention to provide it is a kind of can pressure release type explosive sintering nanometer aluminium bar device and method, the device and
Method can prepare microstructure for nano level high intensity aluminium bar.
It is as follows it is an object of the invention to provide technical scheme to realize：
It is a kind of can pressure release type nanometer aluminium bar explosive sintering device and method, the device include upper end plug, jacket, strike
Pipe, outer tube, pressure release piece and pedestal；Upper end plug, jacket, strike pipe and pedestal are mutually fitted close, and form the closed appearance of column
, there is gap in device, the gap between outer tube and strike pipe is used in containing at the top of explosive, outer tube between jacket and strike pipe
Booster gains and detonator are fixed in heart position, it is characterised in that the pedestal of the device is provided with pressure relief, wherein, the top of pedestal
Portion center, which is provided with, to be used to be sequentially provided with pressure release piece, pad at the top of the groove of gas in compressing powder, and pedestal；In addition, upper end is stifled
The top of head is set to be used for the pyramidal structure of voltage stabilizing during propagation of explosion.
Further, jacket, strike pipe, upper end plug and pedestal are 45# steel, and outer tube is PVC engineering plastics.
The method of the sintering nanometer aluminium bar of the present invention is comprised the following steps that：
(a) jacket, strike pipe and pedestal are assembled, is put into together with nanometer aluminium powder and upper end plug full of protective atmosphere
In closed glove box；
(b) nanometer aluminium powder is uniformly added into jacket, is compacted, and cover upper end plug；
(c) sintering equipment is taken out out of glove box；
(d) sintering equipment is assembled with outer tube, and adds low explosive wherein；
(e) detonator triggering powder column detonation low explosive is started, strike pipe hits jacket under explosive force effect, and compacting is received
Rice aluminium powder, obtains nanometer aluminium bar；
(f) cutting strike pipe and jacket, the nanometer aluminium bar needed for obtaining.
Further, in step (b), aluminium powder loads compactness and reaches 40%-60%.
Further, the medicine thickness degree L4 described in step (d) is 13.5mm.
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 particle diameter of terraced explosive is between 1~2 μm.
The size of aluminum particle in the present invention is between 60~140nm, and the crystallite dimension of the aluminium bar after sintering mainly collects
In between 60~500nm, there is few portion crystal to be agglomerated into bulky grain.
The present invention compared with prior art, its remarkable advantage：
(1) product of the invention reaches nano level aluminium bar for crystallite dimension, and particle diameter distribution is narrower.
(2) present invention uses explosive sintering technology, and one-shot forming, industry is simple, it is possible to achieve industrialized production.
(3) the driving explosive that the present invention is used is AN-TNT containing explosive, cheap, wide material sources.
(4) plug, jacket and the strike tubular construction that the present invention is used are simple, using common stainless steel material, price
Cheaply while easy to process.
Brief description of the drawings
Fig. 1 be the present invention can pressure release type nanometer aluminium bar explosive sintering device structural representation；
Fig. 2 is the SEM figures 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 of sintered bar product 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；2nd, booster gains；3rd, low explosive；4th, upper end plug；5th, strike pipe；6th, jacket；7th, nanometer
Aluminium powder；8th, outer tube；9th, pressure release piece；10th, pad；11st, groove；12nd, pedestal.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
The present invention is realized by following device：
It is a kind of can pressure release type nanometer aluminium bar explosive sintering device, the device include upper end plug 4, jacket 6, strike pipe 5,
Outer tube 8, pressure release piece 9 and pedestal 12；Upper end plug 4, jacket 6, strike pipe 5 and pedestal 12 are mutually fitted close, and form column
, there is gap between jacket 6 and strike pipe 5, base central has the groove 11 for gas in compressing powder, overcoat in closed container
Gap between pipe 8 and strike pipe 5 is used for containing explosive, and outer tube top center fixes booster gains 2 and detonator 1.Base
Seat 12 is provided with pressure relief, wherein, the top center of pedestal 12, which is provided with, is used for the groove 11 of gas in compressing powder, and pedestal
12 tops are sequentially provided with pressure release piece 9, pad 10；In addition, the top of upper end plug 4 is set to be used for the cone of voltage stabilizing during propagation of explosion
Shape structure
Wherein, upper end plug 4 is made up of a circular cone and two cylinders, and respectively inclination angle × diameter dimension is：45°×
45mm, diameter × high size is：41 × 10mm and diameter × high size are：26 × 10mm cylinder；External diameter × thickness of jacket 6
Degree × high size is：30×2×160mm；Strike pipe 5 external diameter × thickness × high size be：45×2×180mm；Pressure release piece 9
Diameter × thickness be：26×0.2mm；External diameter × internal diameter × thickness of perforate pad 10 is：26×2×1mm；Base
Seat 12 is made up of two cylinders, and diameter × high size is：26 × 10mm and diameter × high size are 41 × 10mm；In pedestal 12
Diameter × high size of groove 11 be：10×13mm；External diameter × thickness of outer tube 8 × high size is：75×1.5×
220mm。
The top of upper end plug 4 is taper, is propagated to make detonation wave axially stablize, and jacket 6 is to contain nanometer aluminium powder 7
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 in gap, stabilizes it the effect of propagation, explosive, the base of bottom are deposited between outer tube 8 and strike pipe 5
Seat 12 is used for fixing jacket 6 and strike pipe 5, while completely cutting off air, hollow recess 12 is opened at the center of pedestal 12, and upper end has perforate pad
Piece and tagger, detonator 1 and powder column 2 are fixed on device top.Using the driving extruding strike pipe 5 of low explosive 4, jacket is impacted
6, stable axial impact ripple extrusion friction nanometer aluminium powder 7 is formed, it is sintered on the aluminium bar with nanostructured, pedestal 12
Pressure release piece 9 between powder particle in by compacting process gas impact when rupture, be delivered to by the centre bore of pad 10
In the groove 12 of pedestal, gases at high pressure are formed, the generation of centre bore and shedding for powder can be effectively prevented.
Embodiment
The present invention use nanometer aluminium powder 7 particle mean size for 100nm, the low explosive 3 used for powdery ammonium ladder detonator,
Its particle diameter is 1.5 μm, carries out preparing nanometer aluminium bar in accordance with the following steps
(a) jacket 6, strike pipe 5 and pedestal 12 are assembled, is put into together with nanometer aluminium powder 7 and upper end plug 4 full of protection
In the closed glove box of atmosphere；
(b) 100g nanometer aluminium powders 7 are uniformly added into jacket 6, are 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 is assembled with outer tube 8, and interior addition low explosive 3 is managed in outer tube 8, powder charge is close
Spend for 0.9g/cm3；
(e) the triggering detonation low explosive 3 of powder column 2 of detonator 1 is started, strike pipe 5 hits jacket 6 under explosive force effect,
Nanometer aluminium powder 7 is compacted, nanometer aluminium bar is obtained；
(f) cutting strike pipe 5 and jacket 6, the nanometer aluminium bar needed for obtaining.
Nanometer aluminium bar made from the present embodiment material object as shown in figure 4, nanometer aluminium bar Vickers hardness be 120Kgf/mm2,
Its hardness has reached that traditional industry prepares more than 4 times of aluminium bar hardness, as shown in Figure 5, it can be seen that obtained nanometer aluminium bar
Microstructure is uniform, as shown in fig. 6, the particle diameter of obtained nanometer aluminium bar is within 200nm, consistency is higher.
Claims (10)
1. it is a kind of can pressure release type nanometer aluminium bar explosive sintering device, the device include upper end plug (4), jacket (6), strike pipe
(5), outer tube (8), pressure release piece (9) and pedestal (12)；Upper end plug (4), jacket (6), strike pipe (5) and pedestal (12) are mutually
It is fitted close, forms column closed container, there is gap, outer tube (8) and strike pipe (5) between jacket (6) and strike pipe (5)
Between gap be used for containing explosive, outer tube top center fixes booster gains (2) and detonator (1), it is characterised in that
The pedestal (12) of the device is provided with pressure relief, wherein, the top center of pedestal (12), which is provided with, is used for gas in compressing powder
Groove (11), and pedestal (12) at the top of be sequentially provided with pressure release piece (9), pad (10)；In addition, the top of upper end plug (4) is set
It is set to the pyramidal structure for voltage stabilizing during propagation of explosion.
2. it is according to claim 1 can pressure release type nanometer aluminium bar explosive sintering device, it is characterised in that described upper end
Plug (4) is made up of a circular cone and two cylinders, and respectively diameter × high size is：45 × 22.5mm circular cone, diameter
× high size is：41 × 10mm and diameter × high size are：26 × 10mm cylinder.
3. it is according to claim 1 can pressure release type nanometer aluminium bar explosive sintering device, it is characterised in that jacket (6)
External diameter × thickness × high size is：30×2×160mm；Strike pipe (5) external diameter × thickness × high size be：45×2×
180mm；External diameter × thickness of outer tube (8) × high size is：75×1.5×220mm.
4. it is according to claim 1 can pressure release type nanometer aluminium bar explosive sintering device, it is characterised in that pressure release piece (9)
Diameter × thickness be：26×0.2mm；External diameter × internal diameter × thickness of perforate pad (10) is：26×2×1mm；
Pedestal (12) is made up of two cylinders, and diameter × high size is：26 × 10mm and diameter × high size are 41 × 10mm；Pedestal
(12) diameter × high size of the groove (11) in is：10×13mm.
5. it is according to claim 1 can pressure release type nanometer aluminium bar explosive sintering device, it is characterised in that described jacket
(6), strike pipe (5), upper end plug (4) and pedestal use 45# steel, and described outer tube (8) uses PVC engineering plastics.
6. a kind of nanometer aluminium bar explosive sintering method based on claim 1-5 described devices, it is characterised in that described nanometer
The step of method of aluminium powder sintering, is specific as follows：
(a) jacket (6), strike pipe (5) and pedestal (12) are assembled, is put into and fills together with nanometer aluminium powder (7) and upper end plug (4)
In the closed glove box of full protective atmosphere；
(b) nanometer aluminium powder (7) is uniformly added into jacket (6), be compacted, aluminium powder loads compactness and 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 (8) are assembled, and low explosive (3) is added in outer tube (8) pipe；
(e) detonator (1) triggering powder column (2) detonation low explosive (3) is started, strike pipe (5) hits bag under explosive force effect
Cover (6), compacting nanometer aluminium powder (7) obtains nanometer aluminium bar；
(f) cutting strike pipe (5) and jacket (6), the nanometer aluminium bar needed for obtaining.
7. according to claim 6 nanometer of aluminium bar explosive sintering method, it is characterised in that in step (d), described is low quick-fried
Fast explosive (3) is powdery ammonium ladder detonator, and the degree of packing of described powdery ammonium ladder detonator is 0.9g/cm3。
8. according to claim 7 nanometer of aluminium bar explosive sintering method, it is characterised in that described powdery ammonium ladder detonator
Particle diameter is between 1~2 μm.
9. according to claim 6 nanometer of aluminium bar explosive sintering method, it is characterised in that described nanometer aluminium powder (7)
Size is between 60~140nm.
10. according to claim 6 nanometer of aluminium bar explosive sintering method, it is characterised in that the guarantor in described glove box
Shield atmosphere is argon gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710448635.1A CN107052331B (en) | 2017-06-14 | 2017-06-14 | Device and method for explosion sintering of nano aluminum bar capable of releasing pressure |
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| CN201710448635.1A CN107052331B (en) | 2017-06-14 | 2017-06-14 | Device and method for explosion sintering of nano aluminum bar capable of releasing pressure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109047771A (en) * | 2018-08-06 | 2018-12-21 | 南京理工大学 | The device and method of explosive sintering technique preparation nanometer aluminum pipe |
| 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 |
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| CN1354131A (en) * | 2000-11-21 | 2002-06-19 | 日本油脂株式会社 | Method for manufacturing high pressure phase material |
| JP2003277805A (en) * | 2002-03-20 | 2003-10-02 | Asahi Kasei Corp | Magnetostrictive material and manufacturing method |
| CN101745639A (en) * | 2008-12-05 | 2010-06-23 | 南京理工大学 | Preparation method of non-crystalline grains reinforced aluminium-base composite material by means of explosive compaction |
| CN103011243A (en) * | 2012-12-01 | 2013-04-03 | 中北大学 | Preparation method of nano metal oxide and reaction device for preparing nano metal oxide |
| CN206912247U (en) * | 2017-06-14 | 2018-01-23 | 南京理工大学 | Can pressure release type explosive sintering nanometer aluminium bar device |
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Patent Citations (6)
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| JPS61502A (en) * | 1984-06-13 | 1986-01-06 | Asahi Chem Ind Co Ltd | Molding method of powdery body |
| CN1354131A (en) * | 2000-11-21 | 2002-06-19 | 日本油脂株式会社 | Method for manufacturing high pressure phase material |
| JP2003277805A (en) * | 2002-03-20 | 2003-10-02 | Asahi Kasei Corp | Magnetostrictive material and manufacturing method |
| CN101745639A (en) * | 2008-12-05 | 2010-06-23 | 南京理工大学 | Preparation method of non-crystalline grains reinforced aluminium-base composite material by means of explosive compaction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109047771A (en) * | 2018-08-06 | 2018-12-21 | 南京理工大学 | The device and method of explosive sintering technique preparation nanometer aluminum pipe |
| 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 |
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