CN103484706A - Preparing device and method of directional carbon nano tube reinforced metal matrix composite material - Google Patents
Preparing device and method of directional carbon nano tube reinforced metal matrix composite material Download PDFInfo
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- CN103484706A CN103484706A CN201310422144.1A CN201310422144A CN103484706A CN 103484706 A CN103484706 A CN 103484706A CN 201310422144 A CN201310422144 A CN 201310422144A CN 103484706 A CN103484706 A CN 103484706A
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Abstract
The invention discloses a preparing device and method of directional carbon nano tube reinforced metal matrix composite material. The preparing device and method are used for solving the problem that an existing preparing device prepares the directional carbon nano tube reinforced metal matrix composite material difficultly. According to the technical scheme, the bottom of a crucible is provided with an electromagnetic stirrer, an opening of the crucible is provided with an ultrasonic amplitude rod, the crucible is communicated with a gas pressure tank through a gas conveying pipe provided with a reducing valve, and is communicated with a female die barrel through a liquid conveying pipe, an exhaust pipe provided with a valve is used for exhausting gas, the crucible and the female die barrel are placed in a first resistance furnace and a second resistance furnace to be heated, a coil is placed outside the second resistance furnace of the female die barrel, the upper portion of the female die barrel is sealed through a male die and an upper cushion block, and the lower portion of the female die barrel is sealed through a forming die and a lower cushion block. According to the preparing device and method, even dispersion of carbon nano tubes in metal liquid is achieved through an electromagnetic field and ultrasonic coupling, then the directional carbon nano tube reinforced metal matrix composite material is formed by means of the coupling function of magnetic filed induction and stress induction.
Description
Technical field
The present invention relates to a kind of device for MMCs, particularly a kind of aligned carbon nanotube strengthens device for MMCs.Also relate to and a kind ofly utilize this aligned carbon nanotube to strengthen device for MMCs to prepare the method that aligned carbon nanotube strengthens metal-base composites.
Background technology
Metal-base composites because Young's modulus is high, toughness and shock-resistance is good, the advantage such as little, higher electroconductibility and thermal conductivity gains great popularity to the susceptibility of temperature change.
General C fiber, Ti fiber, B fiber, the Al of adopting
2o
3staple fibre, SiC whisker, C particle, SiC particle, A1
2o
3particle, B
4c particle, Si
3n
4particle, WC particle, Mo
2c particle, ZrO
2particle, ZrB
2the wild phases such as particle, carbon nanotube and graphite carry out the compound metal-base composites that obtains.Wherein carbon nanotube, because of its excellent mechanical property, is widely used in the reinforcement of matrix material.Carbon nanotube has very high axial strength and rigidity, when carbon nanotube, in matrix, is while aligning, and along the mechanical property of its arragement direction, will, far above other directions, show obvious anisotropy.
Document " publication number is the Chinese invention patent of CN102070877A " discloses a kind of ordered arrangement carbon nano tube/epoxy resin composite material and preparation method thereof.The method carbon nanotube used has iron for load at least, cobalt, nickel and ferriferrous oxide nano-particle be a kind of carbon nanotube wherein, first use mechanical stirring and ultrasonic method by the above-mentioned carbon nanotube of 1～15 mass parts by solvent dispersion in the epoxy resin of 100 mass parts, heating adds the amine curing agent of 10～50 mass parts again and further mixes after removing solvent, after froth in vacuum, mixture is poured into to the mould that is placed in the magnetic field that intensity is 0.15～1.0 tesla, after at room temperature solidifying 0.5～1h, mould is taken out from magnetic field, finally in room temperature～120,4～24h is solidified in a ℃ continuation.
In prior art, the composite material and preparation method thereof that aligned carbon nanotube strengthens mainly contains stress-induced orientation, electric field induced orientation and induced by magnetic field orientation etc., and technology of preparing in this respect focuses mostly in polymer matrix composite.And the technology of preparing that strengthens metal-base composites for aligned carbon nanotube is due to it, to prepare difficulty higher, domestic and international rarely seen report.This is mainly because the surface that produces, the huge surface of nanometer reinforcement can make to have and have extremely strong agglomeration between the object of nano-scale and make particle size become large.How these nanometer reinforcements are dispersed in metallic matrix, and to make it ordered arrangement and keep the single body of nano-scale be to prepare the matter of utmost importance that the high-performance metal based composites must solve to give full play to its nano effect.
Summary of the invention
Strengthen in order to overcome existing aligned carbon nanotube the deficiency that device for MMCs is difficult to prepare aligned carbon nanotube enhancing metal-base composites, the invention provides a kind of aligned carbon nanotube and strengthen device for MMCs.This device arranges magnetic stirrer in the bottom of crucible, be equipped with the ultrasonic amplitude bar at mouth of pot, crucible is communicated with air pressure tank by the pneumatic tube that reducing valve is installed, and be communicated with the die bucket by tubing, by being installed, valvular vapor pipe carries out exhaust, crucible and die bucket place respectively the first resistance furnace outward and the second resistance furnace is heated, place coil outside the second resistance furnace outside the die bucket, utilize punch and upper cushion block sealing die bucket top, utilize shaping die and lower cushion block to be sealed die bucket bottom.The present invention utilizes electromagnetic field and ultrasonic wave-coupled to realize dispersed in molten metal of carbon nanotube, then by induced by magnetic field and stress induced coupling, can realize that the high performance aligned carbon nanotube of once-forming strengthens metal-base composites.
The present invention also provides and utilizes this aligned carbon nanotube to strengthen the method that device for MMCs prepares aligned carbon nanotube enhancing metal-base composites.
The technical solution adopted for the present invention to solve the technical problems is: a kind of aligned carbon nanotube strengthens device for MMCs, is characterized in: comprise reducing valve 1, the first resistance furnace 2, air pressure tank 3, crucible 4, magnetic stirrer 5, tubing 6, ultrasonic amplitude bar 7, pneumatic tube 9, punch 10, upper cushion block 11, the second resistance furnace 12, vapor pipe 13, valve 14, coil 15, die bucket 16, shaping die 17 and lower cushion block 18.The bottom of crucible 4 is provided with magnetic stirrer 5, be equipped with ultrasonic amplitude bar 7 at mouth of pot 8, crucible 4 is communicated with air pressure tank 3 by the pneumatic tube 9 that reducing valve 1 is installed, and be communicated with die bucket 16 by tubing 6, carry out exhaust by the vapor pipe 13 that valve 14 is installed, crucible 4 and die bucket 16 be outer places respectively the first resistance furnace 2 and the second resistance furnace 12 is heated, the outer placement coil 15 of the second resistance furnace 12 outside die bucket 16, punch 10 and upper cushion block 11 are used for sealing die bucket 16 tops, and shaping die 17 and lower cushion block 18 are used for sealing die bucket 16 bottoms.
A kind ofly utilize above-mentioned aligned carbon nanotube to strengthen device for MMCs to prepare the method that aligned carbon nanotube strengthens metal-base composites, be characterized in comprising the following steps:
Step 1, raw metal and carbon nanotube are packed in crucible 4 with the aluminium foil parcel, fall punch 10 and compress upper cushion block 11, open reducing valve 1 and valve 14, crucible 4 is communicated with air pressure tank 3, pass into shielding gas by pneumatic tube 9, the shielding gas tubing 6 of flowing through, finally discharged by vapor pipe 13;
Step 3, after raw metal melts, open ultrasonic generator, ultrasonic amplitude bar 7 is placed in to 5～10mm place under liquid level, ultrasonic power is 500～2000W, and ultrasonic frequency is 10～100kHz, meanwhile, open magnetic stirrer 5, frequency is 2Hz～50Hz, and working current is 10A～1000A, keeps 20-30 minute;
The invention has the beneficial effects as follows: this device arranges magnetic stirrer in the bottom of crucible, be equipped with the ultrasonic amplitude bar at mouth of pot, crucible is communicated with air pressure tank by the pneumatic tube that reducing valve is installed, and be communicated with the die bucket by tubing, by being installed, valvular vapor pipe carries out exhaust, crucible and die bucket place respectively the first resistance furnace outward and the second resistance furnace is heated, place coil outside the second resistance furnace outside the die bucket, utilize punch and upper cushion block sealing die bucket top, utilize shaping die and lower cushion block to be sealed die bucket bottom.The present invention utilizes electromagnetic field and ultrasonic wave-coupled to realize dispersed in molten metal of carbon nanotube, then by induced by magnetic field and stress induced coupling, can realize that the high performance aligned carbon nanotube of once-forming strengthens metal-base composites.
Under ultrasonic wave and induction stirring coupling, can greatly improve the dispersiveness of carbon nanotube in metallic matrix reduce polluting under the prerequisite of molten metal, and ultrasonic wave can provide energy for surface reaction, improve carbon nanotube and intermetallic wettability.
The coupling of compound outfield ultrasonic wave and induction stirring disperses to induce coupling inducing to be shaped with compound outfield induced by magnetic field and stress field to combine, and collects dispersion, is oriented to one, can once-forming high-performance metal based composites, and equipment requirements is simple, and cost is low.
Describe the present invention in detail below in conjunction with drawings and Examples.
The accompanying drawing explanation
Fig. 1 is the structural representation that aligned carbon nanotube of the present invention strengthens device for MMCs.
In figure, 1-reducing valve, 2-the first resistance furnace, 3-air pressure tank, the 4-crucible, 5-magnetic stirrer, 6-tubing, 7-ultrasonic amplitude bar, 8-mouth of pot, 9-pneumatic tube, the 10-punch, the upper cushion block of 11-, 12-the second resistance furnace, the 13-vapor pipe, 14-valve, 15-coil, 16 die buckets, 17-shaping die, 18-lower cushion block.
Embodiment
Following examples are with reference to Fig. 1.
Device embodiment.The present invention includes reducing valve 1, the first resistance furnace 2, air pressure tank 3, crucible 4, magnetic stirrer 5, tubing 6, ultrasonic amplitude bar 7, pneumatic tube 9, punch 10, upper cushion block 11, the second resistance furnace 12, vapor pipe 13, valve 14, coil 15, die bucket 16, shaping die 17 and lower cushion block 18.The bottom of crucible 4 is provided with magnetic stirrer 5, be equipped with ultrasonic amplitude bar 7 at mouth of pot 8, crucible 4 is communicated with air pressure tank 3 by the pneumatic tube 9 that reducing valve 1 is installed, and be communicated with die bucket 16 by tubing 6, carry out exhaust by the vapor pipe 13 that valve 14 is installed, crucible 4 and die bucket 16 be outer places respectively the first resistance furnace 2 and the second resistance furnace 12 is heated, the outer placement coil 15 of the second resistance furnace 12 outside die bucket 16, utilize punch 10 and upper cushion block 11 sealing die bucket 16 tops, utilize shaping die 17 and lower cushion block 18 to be sealed die bucket 16 bottoms.
Embodiment of the method 1: a kind of method for preparing aligned carbon nanotube enhancing magnesium base composite material comprises the following steps:
Step 1: AZ91D magnesium alloy and the effective Aluminium Foil Package of multi-wall carbon nano-tube are wrapped up according to volume fraction 100:1 and packed in crucible 4, fall punch 10 and compress cushion block 11, open reducing valve 1 and valve 14, pass into air pressure tank 3, pass into shielding gas by pneumatic tube 9, the tubing 6 of flowing through, finally discharged by vapor pipe 13;
Step 2: open resistance furnace 2, the interior AZ91D magnesium alloy of crucible 4 is all melted, open resistance furnace 12, preheating die bucket 16 and shaping die 17;
Step 3: after AZ91D melts, open ultrasonic generator, ultrasonic amplitude bar 7 is placed in to 5mm place under liquid level, ultrasonic power is 1500W, ultrasonic frequency is 20kHz, meanwhile, opens magnetic stirrer 5, frequency is 10Hz, and working current is 250A, keeps 20 minutes;
Step 4: take out ultrasonic amplitude bar 7, by mouth of pot 8 sealings, during under the effect of air pressure, blend melt is pressed into die, coil 15 is passed into to direct current, when melt is cooled to 450 ℃ of the liquid-solid state temperature of material, remove cushion block 12 and cushion block 18, punch 10 is descending, utilize high extrusion ratio to be pushed, can prepare aligned carbon nanotube and strengthen AZ91D magnesium base composite material clavate product.
Embodiment of the method 2: a kind of method for preparing the aligned carbon nanotube reinforced aluminum matrix composites comprises the following steps:
Step 1: A356 aluminium alloy and the effective Aluminium Foil Package of multi-wall carbon nano-tube are wrapped up according to volume fraction 50:1 and packed in crucible 4, fall punch 10 and compress cushion blocks 11, open reducing valve 1 and valve 14, pass into air pressure tank 3, pass into shielding gas by pneumatic tube 9, the tubing 6 of flowing through, finally discharged by vapor pipe 13;
Step 2: open resistance furnace 2, the interior A356 aluminium alloy of crucible 4 is all melted, open resistance furnace 12, preheating die bucket 16 and shaping die 17;
Step 3: after the A356 aluminium alloy melts, open ultrasonic generator, ultrasonic amplitude bar 7 is placed in to 8mm place under liquid level, ultrasonic power is 500W, ultrasonic frequency is 10kHz, meanwhile, opens magnetic stirrer 5, frequency is 2Hz, and working current is 1000A, keeps 30 minutes;
Step 4: take out ultrasonic amplitude bar 7, by mouth of pot 8 sealings, during under the effect of air pressure, blend melt is pressed into die, coil 15 is passed into to direct current, when melt is cooled to 575 ℃ of the liquid-solid state temperature of material, remove cushion block 12 and cushion block 18, punch 10 is descending, utilize high extrusion ratio to be pushed, can prepare aligned carbon nanotube and strengthen A356 aluminium alloy aluminum matrix composite clavate product.
Embodiment of the method 3: a kind of method for preparing aligned carbon nanotube enhancing Cu-base composites comprises the following steps:
Step 1: copper and Single Walled Carbon Nanotube are packed in crucible 4 according to volume fraction 200:1 with the aluminium foil parcel, fall punch 10 and compress cushion blocks 11, open reducing valve 1 and valve 14, pass into air pressure tank 3, pass into shielding gas by pneumatic tube 9, the tubing 6 of flowing through, finally discharged by vapor pipe 13;
Step 2: open resistance furnace 2, the interior A356 aluminium alloy of crucible 4 is all melted, open resistance furnace 12, preheating die bucket 16 and shaping die 17;
Step 3: after copper melts, open ultrasonic generator, ultrasonic amplitude bar 7 is placed in to 5mm place under liquid level, ultrasonic power is 2000W, ultrasonic frequency is 100kHz, meanwhile, opens magnetic stirrer 5, frequency is 50Hz, and working current is 10A, keeps 25 minutes;
Step 4: take out ultrasonic amplitude bar 7, by mouth of pot 8 sealings, during under the effect of air pressure, blend melt is pressed into die, coil 15 is passed into to direct current, when melt is cooled to 1050 ℃ of the liquid-solid state temperature of material, remove cushion block 12 and cushion block 18, punch 10 is descending, utilize high extrusion ratio to be pushed, can prepare aligned carbon nanotube and strengthen Cu-base composites clavate product.
Claims (2)
1. an aligned carbon nanotube strengthens device for MMCs, it is characterized in that comprising reducing valve (1), the first resistance furnace (2), air pressure tank (3), crucible (4), magnetic stirrer (5), tubing (6), ultrasonic amplitude bar (7), pneumatic tube (9), punch (10), upper cushion block (11), the second resistance furnace (12), vapor pipe (13), valve (14), coil (15), die bucket (16), shaping die (17) and lower cushion block (18), the bottom of crucible (4) is provided with magnetic stirrer (5), be equipped with ultrasonic amplitude bar (7) at mouth of pot (8), crucible (4) is communicated with air pressure tank (3) by the pneumatic tube (9) that reducing valve (1) is installed, and be communicated with die bucket (16) by tubing (6), carry out exhaust by the vapor pipe (13) that valve (14) are installed, crucible (4) places respectively the first resistance furnace (2) outward with die bucket (16) and the second resistance furnace (12) is heated, place coil (15) outside the second resistance furnace (12) outside die bucket (16), punch (10) and upper cushion block (11) are used for sealing die bucket (16) top, shaping die (17) and lower cushion block (18) are used for sealing die bucket (16) bottom.
2. one kind is utilized the described aligned carbon nanotube of claim 1 to strengthen the method that device for MMCs prepares aligned carbon nanotube enhancing metal-base composites, it is characterized in that comprising the following steps:
Step 1, raw metal and carbon nanotube are packed in crucible (4) with the aluminium foil parcel, fall cushion block (11) on punch (10) compression, open reducing valve (1) and valve (14), crucible (4) is communicated with air pressure tank (3), pass into shielding gas by pneumatic tube (9), the shielding gas tubing (6) of flowing through, finally discharged by vapor pipe (13);
Step 2, open the first resistance furnace (2), the interior raw metal of crucible (4) is melted, open the second resistance furnace (12), preheating die bucket (16) and shaping die (17);
Step 3, after raw metal melts, open ultrasonic generator, ultrasonic amplitude bar (7) is placed in to 5～10mm place under liquid level, ultrasonic power is 500～2000W, and ultrasonic frequency is 10～100kHz, meanwhile, open magnetic stirrer 5, frequency is 2Hz～50Hz, and working current is 10A～1000A, keeps 20-30 minute;
Step 4, taking-up ultrasonic amplitude bar (7), mouth of pot (8) is sealed, under the effect of air pressure, blend melt is pressed in die bucket (16), pass into direct current to coil (15), when melt is cooled to the liquid-solid state temperature of material, remove upper cushion block (11) and lower cushion block (18), the descending extruding of punch (10), realize carbon nanotube aligning in metallic matrix, obtain aligned carbon nanotube and strengthen metal-base composites.
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Cited By (4)
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| US9289820B1 (en) | 2015-04-21 | 2016-03-22 | Ut-Battelle, Llc | Apparatus and method for dispersing particles in a molten material without using a mold |
| CN112812567A (en) * | 2021-01-28 | 2021-05-18 | 中南大学 | Preparation method of carbon nano tube/polydimethylsiloxane conductive composite material |
| CN114739171A (en) * | 2022-05-05 | 2022-07-12 | 湖南江滨机器（集团）有限责任公司 | Composite material preparation device and preparation method |
| CN116656996A (en) * | 2023-07-28 | 2023-08-29 | 江东金具设备有限公司 | Composite material preparation system and method |
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| CN101391290A (en) * | 2008-11-05 | 2009-03-25 | 江苏大学 | Method for synthesizing metal matrix composition using metal reaction under the coupling action of magnetic field and ultrasonic field |
| CN101787503A (en) * | 2010-01-14 | 2010-07-28 | 西北工业大学 | Device and method for preparing nanometer fiber orientation and location reinforced metal-based composite material |
| CN101829777A (en) * | 2010-03-18 | 2010-09-15 | 丁家伟 | Process and equipment for preparing nanoparticle-reinforced metal matrix composite material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9289820B1 (en) | 2015-04-21 | 2016-03-22 | Ut-Battelle, Llc | Apparatus and method for dispersing particles in a molten material without using a mold |
| US9475120B1 (en) | 2015-04-21 | 2016-10-25 | Ut-Battelle, Llc | Apparatus and method for dispersing particles in a molten material without using a mold |
| CN112812567A (en) * | 2021-01-28 | 2021-05-18 | 中南大学 | Preparation method of carbon nano tube/polydimethylsiloxane conductive composite material |
| CN114739171A (en) * | 2022-05-05 | 2022-07-12 | 湖南江滨机器（集团）有限责任公司 | Composite material preparation device and preparation method |
| CN116656996A (en) * | 2023-07-28 | 2023-08-29 | 江东金具设备有限公司 | Composite material preparation system and method |
| CN116656996B (en) * | 2023-07-28 | 2023-11-03 | 江东金具设备有限公司 | Composite material preparation system and method |
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