CN112195461A - Nano material cold spraying device - Google Patents
Nano material cold spraying device Download PDFInfo
- Publication number
- CN112195461A CN112195461A CN202010955507.8A CN202010955507A CN112195461A CN 112195461 A CN112195461 A CN 112195461A CN 202010955507 A CN202010955507 A CN 202010955507A CN 112195461 A CN112195461 A CN 112195461A
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- spraying
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- spray pipe
- particles
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- 238000010288 cold spraying Methods 0.000 title claims abstract description 33
- 239000002086 nanomaterial Substances 0.000 title claims abstract description 33
- 239000007921 spray Substances 0.000 claims abstract description 34
- 239000002105 nanoparticle Substances 0.000 claims abstract description 32
- 239000002245 particle Substances 0.000 claims abstract description 23
- 238000005507 spraying Methods 0.000 claims abstract description 22
- 239000011810 insulating material Substances 0.000 claims abstract description 6
- 239000004020 conductor Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 19
- 239000011370 conductive nanoparticle Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 4
- 239000000084 colloidal system Substances 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 claims description 2
- 239000012811 non-conductive material Substances 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000576 coating method Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000005054 agglomeration Methods 0.000 abstract description 4
- 230000002776 aggregation Effects 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 239000011163 secondary particle Substances 0.000 abstract description 4
- 239000011159 matrix material Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002103 nanocoating Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
- C23C24/045—Impact or kinetic deposition of particles by trembling using impacting inert media
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Nozzles (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to the technical field of nano material spraying, in particular to a nano material cold spraying device which comprises a spraying pipe, wherein the spraying pipe is provided with an air inlet and a feeding port, an inner cavity of the spraying pipe is made of a conductive material and is electrified, the spraying pipe is provided with an ultrasonic module, the acoustic module is a sound pressure module, and the sound pressure module is arranged in the transverse direction and the longitudinal direction of the spraying pipe. The inner cavity of the spray pipe is corrugated, the spray pipe is provided with a plurality of air inlets and a feeding port, and the outer surface of the spray pipe is made of insulating materials. The invention avoids particle agglomeration on the premise of not changing the characteristics of the nano material in the cold spraying process of the nano material, and the ultrasonic module arranged on the spray pipe vibrates and disperses the nano particles, thereby avoiding the influence of secondary particles formed after the particles are agglomerated on the formation and performance of a cold spraying coating in the cold spraying process of the nano particles, leading the cold spraying of the nano material to have better spraying effect and realizing precise spraying.
Description
Technical Field
The invention relates to the technical field of nano material spraying, in particular to a nano material cold spraying device.
Background
Cold spraying is a low-temperature spraying process, particles are accelerated to a critical speed by adopting compressed air and then are ejected from a nozzle, and the particles directly impact the surface of a matrix to generate physical deformation and are embedded into the matrix to form a coating. The particles are not melted in the whole process, and the temperature of the surface of the substrate to be sprayed is not more than 150 ℃. The cold spraying has the advantages that the spraying temperature is low, the driving force for phase change is small, solid particle grains are not easy to grow, and the oxidation phenomenon is difficult to occur, so that the cold spraying can be prepared into special materials and coatings with special properties.
The particle size currently used for cold spraying is typically on the order of microns. The nano material can keep the basic structure and properties of the cold spraying nano material due to the grain size effect and the existence of a large number of grain boundaries and interfaces, and can obtain some special mechanical properties and chemical properties of the surface, so that the nano material is easier to accelerate to high speed in cold spraying. Compared with the traditional coating, the nano coating prepared by cold spraying has better performance and becomes one of the future development directions of cold spraying.
However, cold spraying of nanomaterials has certain drawbacks. The nanoparticles are easy to agglomerate due to the surface effect, van der waals force and chemical bond, secondary particles are formed after the nanoparticles are agglomerated, the particle size of the particles is enlarged, and the original performance of the nanoparticles is influenced. The main factor influencing the formation and performance of the cold spray coating is the speed of particles when impacting a substrate, and the coating with a certain thickness can be formed only when the collision speed of the particles and the substrate is higher than a certain critical value; below the critical velocity, there is a rebound between the particle and the matrix, causing erosion or even destruction of the matrix. The particle velocity is closely related to the particle size, and the particle diameter of the agglomerated nanoparticles is increased, so that the velocity is changed, and certain loss is generated.
Therefore, in order to achieve better spraying effect and precise spraying of the cold spraying of the nano material, a technology is needed to avoid particle agglomeration without changing the characteristics of the nano material in the cold spraying process of the nano material.
Disclosure of Invention
The invention provides a nano material cold spraying device for overcoming the defects that secondary particles are formed after nano particles are agglomerated during spraying in the prior art, and the formation and the performance of a cold spraying coating are influenced, and the agglomeration of the particles is avoided on the premise of not changing the characteristics of the nano material in the cold spraying process of the nano material.
In order to solve the technical problems, the invention adopts the technical scheme that: a cold spraying device for nano materials comprises a spray pipe, wherein the spray pipe is provided with an air inlet and a feeding port, an inner cavity of the spray pipe is made of a conductive material and is electrified, and the spray pipe is provided with an ultrasonic module.
In one embodiment, the ultrasound module is an acoustic pressure module. The sound pressure module can cause the vibration of the inner cavity of the spray pipe and disperse the nano particles, so that the nano particles are prevented from agglomerating.
Preferably, the acoustic pressure module is disposed in both lateral and longitudinal directions of the nozzle. The sound pressure modules in the transverse direction and the longitudinal direction cause the oscillation of the inner cavity of the spray pipe in different directions, so that the agglomeration of nano particles is more effectively and comprehensively avoided.
Preferably, the sound pressure module comprises a coil and a vibrating membrane, the vibrating membrane is matched with the coil to realize vibration, and the vibrating membrane is connected with the rigidity component. The arrangement of the rigidity component can amplify the vibration near the natural frequency of the rigidity component and the vibrating membrane, and further increase the technical effect of the sound pressure module.
Preferably, the sound pressure module is made of magnetostrictive material; the sound pressure module is connected with a stiffness assembly. The arrangement of the rigidity component can amplify the vibration, and the technical effect of the sound pressure module is further improved.
Preferably, the sound pressure module is formed by stacking and compounding piezoelectric materials and electrodes, and the electrodes are connected with the stiffness component in series. After the rigidity component is connected with the electrode in series, vibration can be amplified, and the technical effect of the sound pressure module is further improved.
In one embodiment, the interior cavity of the spout is corrugated. The corrugated inner cavity limits the traveling mode of the gas, and the nano particles are further dispersed through the corrugated inner cavity.
Preferably, the outer surface of the nozzle is made of an insulating material; the spray pipe is provided with a plurality of air inlets and a plurality of material feeding ports.
In one embodiment, the nozzle is provided with an air inlet for inputting conductive nanoparticles, and the conductive nanoparticles are coated with a thin organic substance protective layer or a thin non-conductive substance layer on the surfaces of the particles so as to enable the nanoparticles to be charged with static electricity.
In one embodiment, the spray pipe is provided with an air inlet for inputting colloid made of nano particles, and the surfaces of the nano particles are coated with organic matters with charges for spraying.
Compared with the prior art, the invention has the following characteristics:
according to the nano material cold spraying device provided by the invention, the ultrasonic module is arranged on the spray pipe to vibrate and disperse the nano particles, so that the influence on the formation and performance of a cold spraying coating due to secondary particles formed after the particles are agglomerated in the cold spraying process of the nano particles is avoided, the nano material cold spraying has a better spraying effect, and the precise spraying is realized. Meanwhile, the inner cavity of the spray pipe is made of a conductive material and is electrified, so that an electrostatic environment is formed in the spray pipe, the dispersion of nano particles is better realized, and a better spraying effect is realized.
Drawings
Fig. 1 is a schematic view of the overall structure in the embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an acoustic pressure module according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an acoustic pressure module according to an embodiment of the present invention.
Detailed Description
The drawings are for illustration purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
The first embodiment is as follows:
as shown in fig. 1, the present invention provides a cold spraying apparatus for nano-materials, which comprises a nozzle 1, wherein the nozzle 1 is provided with an air inlet 2 and a material feeding port 3, the air inlet 2 inputs high-pressure gas into the nozzle 1, and the high-pressure gas carrying nano-particles or a solution mixed with nano-particles is fed into the nozzle 1 from the material feeding port 3. The air pressure of the air inlet 2 or the material feeding port 3 can be dynamically changed, the air pressure of the air inlet 2 or the material feeding port 3 can be dynamically changed by using the vibrating air pump, and high-frequency pulse type fluctuation is generated at a set frequency. The frequency of the high-frequency pulsed oscillations may be ultrasonic or close to the resonance frequency of the interior of the nozzle tube 1. The internal cavity of the nozzle 1 is shaped and sized to have a specific resonant frequency.
The spray pipe 1 is equipped with supersound module 4, and supersound module 4 can select to sound pressure module 5, and sound pressure module 5 sets up in the horizontal and longitudinal direction of spray pipe 1, can arouse the vibration of spray pipe 1 inner chamber in the equidirectional vibration and dispersion nanoparticle, avoids the nanoparticle reunion.
As shown in fig. 2, in the present embodiment, the sound pressure module 5 includes a coil and a diaphragm 11, the diaphragm 11 is connected to a lead 10, and the diaphragm 11 cooperates with the coil to realize vibration. The diaphragm 11 is connected in series with the stiffness assembly 9 such that vibrations are amplified around the natural frequencies of the stiffness assembly 9 and the diaphragm 11.
In this embodiment, the horizontally disposed sound pressure module 5 may be disposed on the outer surface of the nozzle 1 or the inner cavity of the nozzle 1, and the vertically disposed sound pressure module 5 is disposed on the top of the nozzle 1.
The nozzle 1 is provided with a corrugated inner cavity, and the gas entering from the gas inlet 2 travels along the corrugated inner cavity to cause the nano particles to be further dispersed. The inner cavity is made of a conductive material and is electrified, so that the nano particles are charged in the spray gun and dispersed, the outer surface of the spray pipe 1 is made of an insulating material, and the insulating property of the insulating material is utilized to provide protection.
In this embodiment, a plurality of air inlets 2 and a feeding port 3 can be uniformly arranged on the spray pipe 1, so that successive dispersion of nanoparticles is realized, or multiple nanoparticles are mixed, and simultaneous mixed spraying of different types of nanoparticles is realized.
In this embodiment, for the conductive nanoparticles, the surface of the particles may be coated with a thin organic protective layer or a thin non-conductive layer, so that the nanoparticles are easily charged with static electricity and the dispersibility under static electricity is improved. Or the nano particles can be made into colloid, and the surface of the nano particles is coated with organic matter with charges and sprayed.
Example two:
as shown in fig. 3, the present embodiment is similar to the first embodiment, except that in the present embodiment, the sound pressure module 5 is formed by stacking and compounding the piezoelectric material 7 and the electrode 8, and the piezoelectric material 7 is provided with multiple layers, so that the amplitude is increased by the stacked and compounded structure of the piezoelectric material 7. The electrodes 8 are connected to leads 10, and the electrodes 8 are connected in series with the stiffness assembly 9, so that vibrations are amplified around the natural frequency of the stiffness assembly and the acoustic compression module.
Example three:
the present embodiment is similar to the first embodiment, except that in the present embodiment, the sound pressure module 5 is made of a magnetostrictive material, and the sound pressure module 5 made of the magnetostrictive material is connected to the stiffness component 9.
The specific embodiment is as follows: the cold spraying material adopts nano copper powder, the diameter of spherical particles is 50nm, a PVP protective layer with the thickness of 2nm is coated on the surfaces of the particles, and the charge of the treated particles is 2000 e. The ultrasonic frequency of the ultrasonic module 4 is 80 khz; the sound pressure module is made of magnetostrictive material iron-based alloy, and alternating current with the frequency of 50khz is applied to the sound pressure module; the cavity part of the spray pipe 1 is provided with two air inlets 2 and two material feeding ports 3, the caliber phi is 1mm, and the length L is 40 mm; the inner cavity is made of silver, high voltage electricity of 20kv is supplied to the inner cavity, and the outer surface of the nozzle 1 is made of insulating material; the copper powder strikes the surface of the substrate 6 at a velocity v of 340m/s, exceeding the critical deposition rate, and effective deposition is achieved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A cold spraying device for nano materials comprises a spray pipe, wherein the spray pipe is provided with an air inlet and a feeding port, and is characterized in that an inner cavity of the spray pipe is made of a conductive material and is electrified, and the spray pipe is provided with an ultrasonic module.
2. The nanomaterial cold spray apparatus according to claim 1, wherein the ultrasonic module is an acoustic pressure module.
3. The nanomaterial cold spray apparatus according to claim 2, wherein the sound pressure module is disposed in a transverse and longitudinal direction of the spray pipe.
4. The cold spraying device of nano material according to claim 2, wherein the sound pressure module comprises a coil and a diaphragm, the diaphragm and the coil cooperate to realize vibration, and the diaphragm is connected with a stiffness component.
5. The nano-material cold spray device according to claim 2, wherein the sound pressure module is made of a magnetostrictive material; the sound pressure module is connected with a rigidity component.
6. The cold spray device of nano material according to claim 2, wherein the sound pressure module is formed by stacking and compounding piezoelectric material and electrodes, and the electrodes are connected in series with a stiffness component.
7. The cold spray device of nanomaterials of claim 1, wherein the internal cavity of the nozzle is corrugated.
8. The cold spray device of nanomaterials of claim 7, wherein the lance outer surface is made of an insulating material; the spray pipe is provided with a plurality of air inlets and a feeding port.
9. The cold spraying apparatus of nano material as claimed in claim 1, wherein the nozzle has an air inlet for inputting conductive nano particles, and the conductive nano particles are coated with a thin layer of organic protective material or a thin layer of non-conductive material on the surface of the particles to make the nano particles charged with static electricity.
10. The cold spraying apparatus of nano material as claimed in claim 1, wherein the spraying tube has an air inlet for inputting colloid made of nano particles, and the surface of the nano particles is coated with charged organic matter for spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010955507.8A CN112195461A (en) | 2020-09-11 | 2020-09-11 | Nano material cold spraying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010955507.8A CN112195461A (en) | 2020-09-11 | 2020-09-11 | Nano material cold spraying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112195461A true CN112195461A (en) | 2021-01-08 |
Family
ID=74016298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010955507.8A Pending CN112195461A (en) | 2020-09-11 | 2020-09-11 | Nano material cold spraying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112195461A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6025034A (en) * | 1995-11-13 | 2000-02-15 | University Of Connecticut And Rutgers | Method of manufacture of nanostructured feeds |
| CN101563170A (en) * | 2006-10-19 | 2009-10-21 | 纳米技术有限公司 | Methods and apparatus for making coatings using ultrasonic spray deposition |
| CN102747363A (en) * | 2012-07-17 | 2012-10-24 | 河南理工大学 | Nano metal particle cold spraying technique |
-
2020
- 2020-09-11 CN CN202010955507.8A patent/CN112195461A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6025034A (en) * | 1995-11-13 | 2000-02-15 | University Of Connecticut And Rutgers | Method of manufacture of nanostructured feeds |
| CN101563170A (en) * | 2006-10-19 | 2009-10-21 | 纳米技术有限公司 | Methods and apparatus for making coatings using ultrasonic spray deposition |
| CN102747363A (en) * | 2012-07-17 | 2012-10-24 | 河南理工大学 | Nano metal particle cold spraying technique |
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Application publication date: 20210108 |
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| RJ01 | Rejection of invention patent application after publication |