CN103555984A - Gradient-density metal foam with through holes and preparation method thereof - Google Patents
Gradient-density metal foam with through holes and preparation method thereof Download PDFInfo
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- CN103555984A CN103555984A CN201310499157.9A CN201310499157A CN103555984A CN 103555984 A CN103555984 A CN 103555984A CN 201310499157 A CN201310499157 A CN 201310499157A CN 103555984 A CN103555984 A CN 103555984A
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Abstract
The invention discloses a gradient-density metal foam with through holes in the technical field of nano materials and a preparation method thereof. The gradient-density metal foam with the through holes is prepared by using a metal foam with uniform structural through holes as an original framework, i.e., the metal foam with uniform structural through holes is welded on the upper surface of a red copper heater with a sealed boiling container, the red copper heater is switched on, metal nano liquor is poured into the sealed boiling container in batch and dried under an argon gas environment to prepare the gradient-density metal foam with the through holes. According to the invention, the fiber diameter of the metal foam with the uniform structural through holes is changed by adjusting the concentration and liquid level of the nano liquor, and the deposited metal foam is heated and dried under the argon gas atmosphere to prepare gradient-density metal foams of different specifications. Moreover, the production cost of the gradient-density metal foam is lowered, and popularization and application of the gradient-density metal foam with the through holes are promoted.
Description
Technical field
What the present invention relates to is a kind of method of technical field of nano material, specifically refers in the nano-solution of different concns after boiling, and the metal nanoparticle of identical material is deposited on and on cellular fibre skeleton, changes hole density.
Background technology
Open-pore metal foam is as a kind of novel porous material, its heat exchange specific surface area is large, relative density is less, has noise reduction, filtration and good heat transfer and mechanical property, in damping noise reduction, environmental protection, chemical industry catalysis and energy source and power field, has huge researching value and market application foreground.Open-pore metal foam is comprised of metallic framework and sinuous internal communication passage.And terraced density open-pore metal foam is due to the internal channel structure of its unique gradual change, can improve phase-change heat transfer coefficient and efficiency of combustion, be a kind of porous medium of excellent property.
Through the retrieval of prior art is found, Chinese patent literature CN1179474A, day for announcing 1998-04-22, recorded a kind of preparation method of adjustable foam size foamed aluminium, it is characterized in that first treating foaming metal aluminium and alloy melting thereof, then tackifier aluminium or waste foam aluminium have been covered on it, after insulation, stir, after mixing thoroughly, add whipping agent, then stir and 600～700 ℃ of insulations, from stove, take out the rear cooling uniform foamed aluminium of pore structure that obtains, Chinese patent literature CN101037734A, day for announcing 2007-09-19, recorded the preparation method of the controlled magnesium foam material of a kind of porosity, aperture, it is characterized in that first magnesium dust and be of a size of the urea granules of millimeter magnitude and after additive mixes, pressurization obtains green compact, again by green compact as for soaking in alkaline aqueous solution, then the green compact that soaked are placed under argon atmospher 240～260 ℃ at least 3 hours, then it just can be made to porosity, the controlled magnesium foam material in aperture at least 2.5 hours in 610～630 ℃, Chinese patent literature CN101445883A, day for announcing 2009-06-03, recorded a kind of preparation method of porous foam metal, it is characterized in that after entity metal preparation, being immersed in plating solution, and at the surface uniform plastic pellet of arranging, be electroplated to plastic pellet and be completely covered front taking-up, with solvent, plastic pellet is dissolved, obtain the combination of entity metal and foam metal layer, above-mentioned combination is immersed in plating solution again, so repeatedly carry out, to the foam metal layer volume making, reaching necessary requirement stops, finally the combination of entity metal and foamed metal is carried out separated.Yet, aforesaid method for be the preparation of even structure metal foam, and be not suitable for terraced density metal foam, and technique is comparatively complicated, cost of manufacture is high.
Summary of the invention
The present invention is directed to prior art above shortcomings, a kind of terraced density open-pore metal foam and preparation method thereof is provided, by regulating the concentration of nano-solution and the Fibre diameter of the even metal foam of liquid level change structure, then to post-depositional metal foam heating, drying under argon atmospher, can prepare the terraced density metal foam of different size.
The present invention is achieved by the following technical solutions:
The present invention relates to a kind of preparation method of terraced density open-pore metal foam, by usining even structure open-pore metal foam, as original skeleton, prepare, by even structure open-pore metal foam being welded in after the upper surface with the red copper well heater of airtight boiling container, open red copper well heater and metal nano solution is poured in batches in airtight boiling container and under ar gas environment and dried, making terraced density open-pore metal foam.
Described even structure open-pore metal foam prepares by investment cast mode.
Described welding adopts Pb-free solder; Its concrete steps comprise: first heat the surface of red copper well heater to the fusing point of Pb-free solder, again Pb-free solder is put to red copper heater surfaces and melted, then even structure open-pore metal foam is pressed onto on red copper heater surfaces, then turn off red copper heater power source naturally cooling, realize even structure open-pore metal foam is soldered on red copper well heater.
Described metal nano solution refers to: adopt and pour in deionized water with the nano particle of the identical material of even structure open-pore metal foam, by using ultrasonic stirrer to be prepared into nano-solution.
Described unlatching red copper well heater refers to: make the upper surface of red copper well heater be heated to heat flow density and reach 10
6～1.5 * 10
6wm
～2, and continuous heating naturally cooling after 5～10 hours.
Described pours into and refers in batches: after red copper well heater is opened, first metal nanoparticle is deposited on the skeleton of metal foam bottom, then substep promotes the liquid level of metal nano solution, reopen red copper well heater at every turn, until nanoparticle deposition is to the top skeleton of even structure open-pore metal foam, now the diameter of the bottom fibrous skeleton of even structure open-pore metal foam, apparently higher than top fibrous skeleton, has formed terraced density open-pore metal foam.
The technical requirements of the liquid level of described distribution lifting metal nano solution or minimum/be restricted to greatly: 3mm～20mm.
Described red copper well heater is extractd by welding process after preparation finishes; concrete steps are: red copper well heater is poured out and opened to metal nano solution; make its upper surface temperature be increased to scolding tin fusing point; terraced density metal foam is taken off; and put to the process furnace inner heating drying under argon shield; retain original foam framework, can obtain required terraced density metal foam.
The material of described metal nanoparticle is aluminium, copper or nickel.
Described metal nanoparticle particle size range is 10nm～50nm.
The volumetric concentration scope of described nano-solution is 0.1%～5%.
The present invention relates to the terraced density open-pore metal foam that aforesaid method prepares, the hole density of this metal foam changes in gradient, and porosity is identical, and hole density increases or reduces along a direction.
The variation range of described hole density is 5PPI～130PPI, is preferably the graded of 30～40～50～60～70～80PPI.
The scope of described porosity is 0.88～0.98.
Technique effect
Compared with prior art, the present invention prepares terraced density open-pore metal foam by the nano-solution sedimentation of seething with excitement, and has reduced production cost, has expanded hole density gradient variable range, has promoted applying of terraced density open-pore metal foam.
Embodiment
Below embodiments of the invention are elaborated, the present embodiment is implemented take technical solution of the present invention under prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
The present embodiment is realized by following steps:
The first step, by lost wax process, to prepare hole density be the even structure through hole copper foam that 60PPI, porosity are 0.9.
Second step, open red copper well heater, make the temperature of its heating surface rise to the fusing point (186 ℃) to Pb-free solder, then melt Pb-free solder to red copper heater surfaces, then by the hole density of same size, be that 60PPI, porosity are that 0.9 through hole copper foam is pressed onto on red copper heater surfaces, turn off red copper heater power source, cooling, copper foam is soldered on red copper well heater.
Second step, by being 20nm with median size, nano copper particle is poured in deionized water, by using ultrasonic stirrer to prepare concentration, it is 5% copper nano-solution, then nano-solution is poured in boiling container, made its liquid level be positioned at 1/3rd bronze medal foam height places.
The 3rd step, open red copper well heater, make upper surface heat flow density reach 10
6wm
-2, continuous heating 8 hours, covers layer of copper nano-particle layer on copper cellular fibre skeleton, and the hole density of 1/3rd bronze medal foam segments increases to 70PPI.
The 4th step, the concentration that continues to pour into are 5% copper nano-solution, make its liquid level be positioned at 2/3rds bronze medal foam height places.Open red copper well heater, make upper surface heat flow density reach 10
6wm
-2, continuous heating 8 hours, covers again layer of copper nano-particle layer on copper cellular fibre skeleton, and the hole density of copper foam bottom three/part increases to 80PPI, and 1/3rd to 2/3rds part hole density increase to 70PPI.
The 5th step, nano-solution is poured out; open red copper well heater; make its upper surface temperature be increased to scolding tin fusing point (186 ℃); terraced density copper foam is taken off; and put to the process furnace inner heating drying under argon shield the terraced density copper foam that can obtain porosity and be 0.92, hole density changes by 60PPI～70PPI～80PPI.
Embodiment 2
The present embodiment is realized by following steps:
The first step, by lost wax process, to prepare hole density be the even structure through hole aluminum foam that 30PPI, porosity are 0.95.
Second step, open red copper well heater, make the temperature of its heating surface rise to the fusing point (186 ℃) to Pb-free solder, then melt Pb-free solder to red copper heater surfaces, then by the hole density of same size, be that 30PPI, porosity are that 0.95 through hole aluminum foam is pressed onto on red copper heater surfaces, turn off red copper heater power source, cooling, aluminum foam is soldered on red copper well heater.
Second step, by being 40nm with median size, nano aluminum particle is poured in deionized water, by using ultrasonic stirrer to prepare concentration, it is 5% aluminium nano-solution, then nano-solution is poured in boiling container, made its liquid level be positioned at 1/3rd aluminum foam At The Heights.
The 3rd step, open red copper well heater, make upper surface heat flow density reach 1.2 * 10
6wm
-2, continuous heating 10 hours, covers one deck aluminum nanoparticles layer on copper cellular fibre skeleton, and the hole density of 1/3rd aluminum foam parts increases to 40PPI.
The 4th step, the concentration that continues to pour into are 5% aluminium nano-solution, make its liquid level be positioned at 2/3rds aluminum foam At The Heights.Open red copper well heater, make upper surface heat flow density reach 1.2 * 10
6wm
-2, continuous heating 10 hours, is capped again one deck aluminum nanoparticles layer on aluminum foam fiber reinforcement, and the hole density of 1/3rd aluminum foams parts increases to 50PPI, and 1/3rd to 2/3rds part hole density increase to 40PPI.
The 5th step, nano-solution is poured out; open red copper well heater; make its upper surface temperature be increased to scolding tin fusing point (186 ℃); terraced density aluminum foam is taken off; and put to the process furnace inner heating drying under argon shield the terraced density aluminum foam that can obtain porosity and be 0.96, hole density changes by 30PPI～40PPI～50PPI.
Claims (10)
1. the preparation method of a terraced density open-pore metal foam, it is characterized in that, by usining even structure open-pore metal foam, as original skeleton, prepare, by even structure open-pore metal foam being welded in after the upper surface with the red copper well heater of airtight boiling container, open red copper well heater and metal nano solution is poured in batches in airtight boiling container and under ar gas environment and dried, making terraced density open-pore metal foam.
2. method according to claim 1, is characterized in that, described welding adopts Pb-free solder.
3. method according to claim 1 and 2, it is characterized in that, described welding concrete steps comprise: first heat the surface of red copper well heater to the fusing point of Pb-free solder, again Pb-free solder is put to red copper heater surfaces and melted, then even structure open-pore metal foam is pressed onto on red copper heater surfaces, then turn off red copper heater power source naturally cooling, realize even structure open-pore metal foam is soldered on red copper well heater.
4. method according to claim 1, is characterized in that, described metal nano solution refers to: adopt and pour in deionized water with the nano particle of the identical material of even structure open-pore metal foam, by using ultrasonic stirrer to be prepared into nano-solution.
5. method according to claim 1, is characterized in that, described unlatching red copper well heater refers to: make the upper surface of red copper well heater be heated to heat flow density and reach 10
6～1.5 * 10
6wm
～2, and continuous heating naturally cooling after 5～10 hours.
6. method according to claim 1, it is characterized in that, described pours into and refers in batches: after red copper well heater is opened, first metal nanoparticle is deposited on the skeleton of metal foam bottom, then substep promotes the liquid level of metal nano solution, reopen red copper well heater at every turn, until nanoparticle deposition is to the top skeleton of even structure open-pore metal foam, now the diameter of the bottom fibrous skeleton of even structure open-pore metal foam, apparently higher than top fibrous skeleton, has formed terraced density open-pore metal foam.
7. method according to claim 1, is characterized in that, described metal nanoparticle particle size range is 10nm～50nm.
8. method according to claim 1, is characterized in that, the volumetric concentration scope of described nano-solution is 0.1%～5%.
9. the terraced density open-pore metal foam preparing according to method described in above-mentioned arbitrary claim, is characterized in that, the hole density of this metal foam changes in gradient, and porosity is identical, and hole density increases or reduces along a direction; The variation range of hole density is 5PPI～130PPI, and the scope of porosity is 0.88～0.98.
According to described in above-mentioned arbitrary claim terraced density open-pore metal foam, it is characterized in that, the material of described metal nanoparticle is aluminium, copper or nickel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310499157.9A CN103555984B (en) | 2013-10-22 | 2013-10-22 | Gradient-density metal foam with through holes and preparation method thereof |
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|---|---|---|---|
| CN201310499157.9A CN103555984B (en) | 2013-10-22 | 2013-10-22 | Gradient-density metal foam with through holes and preparation method thereof |
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| CN103555984A true CN103555984A (en) | 2014-02-05 |
| CN103555984B CN103555984B (en) | 2015-04-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104149404A (en) * | 2014-07-14 | 2014-11-19 | 华南理工大学 | Fiber-reinforced foam gradient thermal-insulation vibration-reduction laminated plate |
| CN106694884A (en) * | 2016-12-29 | 2017-05-24 | 西安铂力特激光成形技术有限公司 | Hollowed-out lattice sandwich layer with gradient functionality and manufacturing method of hollowed-out lattice sandwich layer |
| CN109830647A (en) * | 2019-03-14 | 2019-05-31 | 福建猛狮新能源科技有限公司 | A kind of 3D lithium metal battery cathode, lithium metal battery and its preparation and application |
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| CN101086043A (en) * | 2007-07-13 | 2007-12-12 | 东南大学 | Method for preparing foam aluminum and alloy product with closed gradient pore structure |
| JP2009249693A (en) * | 2008-04-07 | 2009-10-29 | Seiko Epson Corp | Method for producing foamed metal sintered compact, and foamed metal sintered compact |
| CN103060592A (en) * | 2013-01-11 | 2013-04-24 | 上海交通大学 | Through-hole metal foam with gradually varied morphologic characteristics, preparation method of through-hole metal foam, and heat exchange device |
-
2013
- 2013-10-22 CN CN201310499157.9A patent/CN103555984B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086043A (en) * | 2007-07-13 | 2007-12-12 | 东南大学 | Method for preparing foam aluminum and alloy product with closed gradient pore structure |
| JP2009249693A (en) * | 2008-04-07 | 2009-10-29 | Seiko Epson Corp | Method for producing foamed metal sintered compact, and foamed metal sintered compact |
| CN103060592A (en) * | 2013-01-11 | 2013-04-24 | 上海交通大学 | Through-hole metal foam with gradually varied morphologic characteristics, preparation method of through-hole metal foam, and heat exchange device |
Non-Patent Citations (1)
| Title |
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| 杨保军 等: "梯度多孔金属材料制备及其应用的研究进展", 《粉末冶金工业》, vol. 18, no. 2, 30 April 2008 (2008-04-30), pages 28 - 32 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104149404A (en) * | 2014-07-14 | 2014-11-19 | 华南理工大学 | Fiber-reinforced foam gradient thermal-insulation vibration-reduction laminated plate |
| CN106694884A (en) * | 2016-12-29 | 2017-05-24 | 西安铂力特激光成形技术有限公司 | Hollowed-out lattice sandwich layer with gradient functionality and manufacturing method of hollowed-out lattice sandwich layer |
| CN106694884B (en) * | 2016-12-29 | 2020-02-21 | 西安铂力特增材技术股份有限公司 | Hollow dot matrix interlayer with gradient functionality and manufacturing method thereof |
| CN109830647A (en) * | 2019-03-14 | 2019-05-31 | 福建猛狮新能源科技有限公司 | A kind of 3D lithium metal battery cathode, lithium metal battery and its preparation and application |
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| CN103555984B (en) | 2015-04-01 |
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