CN209726776U - A kind of ultrasonic wave added direct current sintering furnace - Google Patents
A kind of ultrasonic wave added direct current sintering furnace Download PDFInfo
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- CN209726776U CN209726776U CN201920169399.4U CN201920169399U CN209726776U CN 209726776 U CN209726776 U CN 209726776U CN 201920169399 U CN201920169399 U CN 201920169399U CN 209726776 U CN209726776 U CN 209726776U
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Abstract
The utility model relates to a kind of ultrasonic wave added direct current sintering furnaces, it is characterised in that: comprising: furnace body, ultrasonic control system, DC current control system, uniaxial pressure control system and sintering control centre；Uniaxial pressure control system includes pressure generating unit interconnected and pressure control portion, and pressure generating unit is arranged in furnace body, for unidirectionally being pressurizeed to setting in the intracorporal material to be sintered of furnace；Pressure control portion is connected with sintering control centre；Ultrasonic control system is connected with pressure generating unit, applies mechanical oscillation signal by pressure generating unit and acts on material to be sintered；DC current generator is connected with the pressure generating unit of control pressurer system and sintering control centre respectively.The utility model can be used in the sintering of various advanced materials.
Description
Technical field
The utility model relates to a kind of sintering furnaces, especially with regard to a kind of ultrasonic wave added direct current sintering furnace.
Background technique
The densification sintering of the advanced materials such as high-performance ceramic, hard alloy is the key that scientific and technical in its preparation process
One of problem.By taking advanced structural ceramic material as an example, sintering can promote stomata to be discharged, and improve intergranular bond strength, make
Ceramic particle densification is finally obtained close to theoretical density and with the dense ceramic material of outstanding mechanical property.
Ceramic material usually has high theoretical strength, such as the theoretical strength range of aluminium oxide is 38~76GPa；Carbon
The theoretical strength of SiClx is 44~88GPa.However, it is far not achieved in the actual strength of ceramic material obtained by existing sintering method
Theoretical strength: the actual strength of usual polycrystalline ceramics is only about the 1/500~1/50 of theoretical strength.Ceramic material actual strength is not
It is enough ideal be on the one hand because there are manufacturing defect and fault of construction, such as stomata field trash, crackle, reunion in material, thus
Stress is caused to be concentrated, the strength of materials reduces；It on the other hand is because ceramic crystalline grain is excessive.According to Hall-Petch formula, material
Crystal grain is bigger, then intensity is lower.Sintering method common at present mainly has normal pressure-sintered, gas pressure sintering, hot pressed sintering, electric discharge etc.
Gas ions are sintered (SPS) etc..It is normal pressure-sintered not apply additional pressure to material during the sintering process, i.e., at atmosheric pressure into
Row sintering；Gas pressure sintering then makes to be sintered in the protective atmosphere of material under a certain pressure；With normal pressure-sintered and gas pressure sintering
It compares, hot pressed sintering applies the pressure of tens of megapascal in sintering by pressure head to material, to improve the sintering driving of material
Power promotes stomata to be discharged and crystal grain is inhibited to grow up.Usually, hot pressed sintering material is more caused than normal pressure and air pressure agglomerated material
It is close, crystal grain is smaller, mechanical property is more preferable, but since material internal is still with the presence of significantly holding one's breath hole, performance is improved the standard
It is still not ideal enough.Discharge plasma sintering refers to during the sintering process without external heat source, but is directly passed through pulse electricity to material
Stream, makes its heating by material heating power itself, and use the power on the plasma and activating effect acceleration of sintering of generation, this
Method can shorten sintering time, improve sintering efficiency, however since Current Heating usually makes temperature field in sample uneven
It is even, therefore large scale sample can not be sintered；Structure is complicated for discharge plasma agglomerating plant simultaneously, and cost is very high, is not suitable for work
Industry large-scale application.It is lasting that electric discharge fire is provided if the pulse current in sintering process can be changed to constant DC current
Flower, then can be improved the Uniformity of Temperature Field of agglomerated material, to improve sintered body performance.
Ultrasonic wave is widely used in fields such as modern military, industry, lives, when ultrasonic wave and medium interact
When, it can be with the high-frequency vibration of excitation material each point, to cause various unique physical chemistry effects.For example, ultrasonic wave passes through
Adjoint cavitation effect can produce localized hyperthermia, high pressure and strong shock wave when liquid；Ultrasonic wave acts on material
Material can be promoted to generate strong high-frequency vibration when material, promote the processes such as diffusion, the dissolution of substance.It is envisioned that if energy
Ultrasonication is introduced in material sintering process, further stomata can be promoted to be discharged by the strenuous exercise of particle to be sintered
And crystal grain is inhibited to grow up.
Summary of the invention
In view of the above problems, the object of the present invention is to provide a kind of no external heat sources, by DC current to various
The material to be sintered of size is sintered, and can be synchronized during the sintering process and be carried out ultrasonic wave added processing to material, and gas is promoted
Hole discharge, significantly inhibits crystal grain and grows up, and sintered body consistency is improved, to further increase existing various advanced material performances
Ultrasonic wave added direct current sintering furnace.
To achieve the above object, the utility model takes following technical scheme: a kind of ultrasonic wave added direct current sintering furnace, packet
It includes: furnace body, ultrasonic control system, DC current control centre, uniaxial pressure control system and sintering control centre；It is described unidirectional
Control pressurer system includes pressure generating unit interconnected and pressure control portion, and the pressure generating unit is arranged in the furnace body
It is interior, for unidirectionally being pressurizeed to the intracorporal mold for being clamped with material to be sintered of the furnace is arranged in；The pressure control portion
It is connected with the sintering control centre, the pressure for generating to the pressure generating unit controls；The ultrasound control
System is connected with the pressure generating unit, and applies mechanical oscillation signal by the pressure generating unit and act on material to be sintered
Material；The DC current generator is connected with the pressure generating unit of the control pressurer system and sintering control centre respectively,
DC current is applied to the material to be sintered.
Further, the pressure generating unit includes seaming chuck and push-down head；The seaming chuck is fixed at the furnace
In vivo, the seaming chuck upper end after being pierced by the top of the furnace body with the ultrasonic control system by being connected；The push-down head upper end
Extend into the furnace body by the bottom of furnace body, be on same axis with the seaming chuck, and the push-down head at the top of with
The space for placing material to be sintered is reserved between the seaming chuck bottom；The pressure control portion includes hydraulic cylinder and pressure control
Center processed, the hydraulic cylinder are arranged outside the furnace body, and one end is connected with the push-down head bottom, the other end and the pressure
Power control centre is connected, and the pressure control centre is connected with the sintering control centre.
Further, the ultrasonic control system includes ultrasonic amplitude transformer, ultrasonic transducer, the ultrasonic wave hair being sequentially connected
Raw device and ultrasonic control centre；It is connect at the top of the ultrasonic amplitude transformer other end and the seaming chuck, the ultrasound control centre
Input terminal connect with the sintering control centre.
Further, the input terminal of the DC current control centre connects the sintering control centre, the direct current
The output end at flow control center is separately connected seaming chuck and push-down head in the uniaxial pressure control system, and the direct current
The junction periphery of the output end at flow control center and the seaming chuck and push-down head is surrounded with flexible insulating layer.
Further, the operating voltage of the DC current control centre is 0~1000V, the output electric current of generation is 0~
5000A。
Further, the ultrasonic wave added direct current sintering furnace further includes atmosphere control system, the atmosphere control system packet
Include air inlet/outlet and atmosphere control centre；Described air inlet/outlet one end is connected to the furnace interior, the other end and the atmosphere
Control centre's connection；The control climate center is connect with the sintering control centre.
Further, the ultrasonic wave added direct current sintering furnace further includes cooling water recirculation system；The cooling water cyclic system
System includes water inlet, water outlet, cooling water circulation channel and cooling water control center；The water inlet is located at the furnace body bottom
Portion, the water outlet are located at the top of the furnace body, and the cooling water circulation channel is set to the furnace interior, and with it is described into
The mouth of a river is connected to water outlet；The cooling water control center is connect with the sintering control centre.
Further, the ultrasonic wave added direct current sintering furnace further includes temp measuring system, and the temp measuring system includes temperature measuring window
Mouth and thermometric center；The thermometric window is located in the middle part of the furnace body；The thermometric center passes through the thermometric windows detecting institute
The temperature of material to be sintered in furnace body is stated, and is sent to the sintering control centre.
Further, the furnace body includes bolted upper bell, furnace body and lower bell.
Because the utility model adopts the above technical scheme, it has the following advantages: 1, the utility model is due to can be
Agglomerated material is synchronously treated in sintering process to be ultrasonically treated, and compared with existing sintering technology, can pass through reinforcement
Grain is reset, the roughening of crystal grain when further promoting stomata discharge, and inhibiting high temperature sintering, prepares that consistency is higher, and crystal grain is more
It is small, the advanced material of performance boost.2, the utility model is sintered due to treating agglomerated material using DC current, is being sintered
External heat source is not introduced in the process, thus can further shorten sintering time, improves sintering efficiency, while greatly reducing sintering
Energy consumption in the process is suitble to industrialization large-scale application.3, the utility model due at home and abroad take the lead in using ultrasonic field,
The advanced sintering technology of electric field and field of force THM coupling, can be to prepare performance more excellent than existing various sintering technology products
While different advanced material, promote the discovery and solution of various new phenomenons, new problem, reinforces to advanced material sintering theory
Research and understanding.In conclusion the utility model can be widely applied in a series of sintering process of high-performance advanced materials.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model ultrasonic wave added direct current sintering furnace.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the utility model provides a kind of ultrasonic wave added direct current sintering furnace comprising furnace body 1, uniaxial pressure control
System 2, ultrasonic control system 3, DC current control system 4 and sintering control centre 5 processed；It is sintered control centre 5 and unidirectional pressure
Force control system 2, ultrasonic control system 3, DC current control centre 4 are connected and control each system, and then to setting
Material to be sintered in furnace body 1 applies ultrasonic field, DC current and uniaxial pressure, to realize the burning of high-performance advanced material
Knot.
Uniaxial pressure control system 2 includes seaming chuck 21, push-down head 22, hydraulic cylinder 23 and pressure control centre 24.Upper pressure
First 21 are fixed in furnace body 1, and the upper end at the top of furnace body 1 by being pierced by and being connected with ultrasonic control system 3；22 upper end of push-down head
It is extend into furnace body 1 by 1 bottom of furnace body, is on same axis with seaming chuck 21, and 22 top of push-down head and 21 bottom of seaming chuck
The space for placing the mold 6 for clamping material to be sintered is reserved between portion；22 lower end of push-down head is by being arranged in outside furnace body 1
Hydraulic cylinder 23 is connected with pressure control centre 24, and pressure control centre 24 is connected with sintering control centre 5, is sintered control centre 5
It is required for uniaxial pressure signal to be sent to pressure control centre 24 according to sintering process, pressure control centre 24 is single based on the received
Uniaxial pressure is applied to material to be sintered by push-down head 22 to pressure signal control hydraulic cylinder 23, makes material to be sintered unidirectional
It is sintered under the action of pressure.
Ultrasonic control system 3 includes ultrasonic amplitude transformer 31, ultrasonic transducer 32,33 and of supersonic generator being sequentially connected
Ultrasonic control centre 34.Wherein, it connects, surpasses at the top of 31 other end of ultrasonic amplitude transformer and the seaming chuck 21 by being pierced by inside furnace body 1
The input terminal at acoustic control center 34 is connect with sintering control centre 5；Control centre 5 is sintered to be required according to sintering process by ultrasonic wave
Control signal sends ultrasonic control centre 34 to, and ultrasonic control centre 34 controls supersonic generator 33 according to the signal received
It generates the ultrasonic electrical signal of specific frequency and exports to ultrasonic transducer 32；Ultrasonic transducer 32 is according to piezoelectric effect or mangneto
The ultrasonic electrical signal received is changed into mechanical oscillation signal and exported to ultrasonic amplitude transformer 31 by flex effect；Ultrasonic amplitude of fluctuation
Bar 31 is by the mechanical oscillation signal Amplitude amplification received and realizes cumulative；The mechanical oscillation letter enhanced by ultrasonic amplitude transformer 31
Number material to be sintered is acted on by seaming chuck 21, be sintered material to be sintered can under the action of ultrasonic field simultaneously.
The input terminal connection sintering control centre 5 of DC current control centre 4, the output end of DC current control centre 4
Connect seaming chuck 21 and push-down head 22, and the connection of the output end of DC current control centre 4 and seaming chuck 21 and push-down head 22
Place periphery is surrounded with flexible insulating layer；Sintering control centre 5 requires to send to DC current control signal according to sintering process
DC current control centre 4；DC current control centre 4 passes through 21 He of seaming chuck according to the DC current control signal received
Push-down head 22 is applied across the DC current of mold or material to be sintered, makes material to be sintered can be simultaneously in the effect of DC current
Under be sintered.
In above-described embodiment, ultrasonic wave added direct current sintering furnace further includes atmosphere control system 7, and atmosphere control system 7 includes
Air inlet/outlet 71 and atmosphere control centre 72；It is connected to inside 71 one end of air inlet/outlet and furnace body 1, the other end and control climate center
72 connections；Control climate center 72 is connect with sintering control centre 5；It is sintered control centre 5 and requires to take out very according to sintering process
Spacing wave is passed through gas signal and sends control climate center 72 to, control climate center 72 according to the signal received by into
Operation of the venthole 71 to being vacuumized or being passed through specific gas inside furnace body 1, makes material to be sintered in vacuum environment or guarantor
It is sintered under shield atmosphere.
In above-described embodiment, ultrasonic wave added direct current sintering furnace further includes cooling water recirculation system 8, cooling water recirculation system 8
Including water inlet 81, water outlet 82, cooling water circulation channel 83 and cooling water control center 84；Water inlet 81 is located at 1 bottom of furnace body
Portion, water outlet 82 are located at 1 top of furnace body, and cooling water circulation channel 83 is set to 1 inner wall of furnace body；Water inlet 81 and water outlet 82 are same
When connect with cooling water control center 84, cooling water control center 84 with sintering control centre 5 connect；It is sintered 5, control centre
It requires to send cooling water cycle signal to cooling water control center 84 according to sintering process, cooling water control center 84 is according to receiving
Circulation flow rate of the Signal Regulation cooling water in cooling water circulation channel 83.
In above-described embodiment, ultrasonic wave added direct current sintering furnace further includes temp measuring system 9, and temp measuring system 9 includes thermometric window
91 and thermometric center 92；Thermometric window 91 is located at 1 middle part of furnace body, and thermometric window 91 is connect with thermometric center 92, thermometric center 92
Control centre 5 connect with sintering；During the sintering process, the temperature on 6 surface of mold is detected at thermometric center 92 by thermometric window 91,
And it is transferred to sintering control centre 5；It is sintered control centre 5 and unidirectional pressure is adjusted according to the surface temperature signal of the mold 6 received
The working condition of Force control system 2, ultrasonic control system 3 and DC current control centre 4.
In above-described embodiment, furnace body 1 includes bolted upper bell 11, lower bell 12 and furnace body 13.
In above-described embodiment, ultrasonic wave added direct current sintering furnace further includes grate 10, and grate 10 plays support, fixation to furnace body 1
Effect.
In above-described embodiment, the operating voltage of DC current control centre 4 is about 0~1000V, and the output electric current of generation is about
For 0~5000A.
The utility model also provides a kind of sintering method of ultrasonic wave added direct current sintering furnace, comprising the following steps:
1) checking ensures that each component working condition of sintering furnace is normal, opens lower bell 12, the mould of material to be sintered will be housed
Tool 6 is placed between seaming chuck 21 and push-down head 22, closes lower bell 12；
When using this sintering furnace, before being put into material to be sintered, lower bell 12 is opened.Deployment method is the company of unloading
Lower bell 12 is connect with after the bolt of furnace body 13, lower bell 12, push-down head 22 and hydraulic cylinder 23 are in pressure control centre 24
It is moved down together under effect.Then material to be sintered is placed in mold 6, is closed in 22 upper end of push-down head by the lower end cap of mold 6
Lower bell 13 is closed, that is, bell 12, push-down head 22 and hydraulic cylinder 23 is descended to move up under the action of pressure control centre 24, and even
Connect the bolt between lower bell 12 and furnace body 13；
2) required according to sintering process, sintering control centre 5 by atmosphere control system 7 to being vacuumized inside furnace body 1, and
It is passed through protective atmosphere；
3) ultrasonic control system 3 is controlled by sintering control centre 5 and ultrasonic vibration is carried out to the material to be sintered in furnace body 1
Processing；
4) DC current control centre 4 is controlled by sintering control centre 5 to control between seaming chuck 21 and push-down head 22
Current strength makes material warms to be sintered；
5) uniaxial pressure control system 2 is controlled by sintering control centre 5 and controls pressure suffered by material to be sintered；
6) adjustment above-mentioned 3) 4) 5) sequencing of three steps and duration are required according to sintering process, makes material to be sintered
Expect ultrasonic field, DC current, uniaxial pressure coupling under be sintered；It is supervised during the sintering process by temp measuring system 9
Control in-furnace temperature；
7) supersonic generator 33, DC current control centre 4 are closed after being sintered, and operate uniaxial pressure control system
2 slow removal pressure, and descent of temperature is promoted by cooling water recirculation system 8；
8) in the complete removal of pressure, and furnace temperature is cooled to room temperature, and is opened lower bell 12, is taken out sintered body；Inside furnace body 1
It is cleared up, closes each system, sintering is completed.
The various embodiments described above are merely to illustrate the utility model, wherein the structure of each component, connection type and manufacture craft
Etc. may be changed, all equivalents and improvement carried out on the basis of technical solutions of the utility model,
It should not exclude except the protection scope of the utility model.
Claims (9)
1. a kind of ultrasonic wave added direct current sintering furnace, it is characterised in that: comprising: which furnace body, ultrasonic control system, DC current control
Center, uniaxial pressure control system and sintering control centre；
The uniaxial pressure control system includes pressure generating unit interconnected and pressure control portion, and the pressure generating unit is set
It sets in the furnace body, for unidirectionally being pressurizeed to the intracorporal mold for being clamped with material to be sintered of the furnace is arranged in；Institute
Pressure control portion is stated to be connected with the sintering control centre；
The ultrasonic control system is connected with the pressure generating unit, and applies mechanical oscillation signal by the pressure generating unit
And act on material to be sintered；
The DC current control centre respectively with the pressure generating unit of the uniaxial pressure control system and sintering control centre
It is connected.
2. a kind of ultrasonic wave added direct current sintering furnace as described in claim 1, it is characterised in that: the pressure generating unit includes upper
Pressure head and push-down head；
The seaming chuck is fixed in the furnace body, and the seaming chuck upper end at the top of the furnace body by being pierced by and the ultrasound
Control system is connected；
The push-down head upper end is extend into the furnace body by the bottom of furnace body, is on same axis with the seaming chuck,
And the space for placing material to be sintered is reserved between the seaming chuck bottom at the top of the push-down head；
The pressure control portion includes hydraulic cylinder and pressure control centre, and the hydraulic cylinder is arranged outside the furnace body, one
End is connected with the push-down head bottom, and the other end is connected with the pressure control centre, the pressure control centre and the burning
Control centre is tied to be connected.
3. a kind of ultrasonic wave added direct current sintering furnace as claimed in claim 2, it is characterised in that: the ultrasonic control system includes
Ultrasonic amplitude transformer, ultrasonic transducer, supersonic generator and the ultrasonic control centre being sequentially connected；The ultrasonic amplitude transformer is another
It is connect at the top of end and the seaming chuck, the input terminal of the ultrasound control centre is connect with the sintering control centre.
4. a kind of ultrasonic wave added direct current sintering furnace as claimed in claim 2, it is characterised in that: the DC current control centre
Input terminal connect the sintering control centre, the output end of the DC current control centre is separately connected the uniaxial pressure
Seaming chuck and push-down head in control system, and the output end of the DC current control centre and the seaming chuck and push-down head
Junction periphery be surrounded with flexible insulating layer.
5. a kind of ultrasonic wave added direct current sintering furnace as claimed in claim 4, it is characterised in that: the DC current control centre
Operating voltage be 0~1000V, the output electric current of generation is 0~5000A.
6. a kind of ultrasonic wave added direct current sintering furnace as described in claim 1, it is characterised in that: the ultrasonic wave added direct current sintering
Furnace further includes atmosphere control system, and the atmosphere control system includes air inlet/outlet and atmosphere control centre；The air inlet/outlet
One end is connected to the furnace interior, and the other end is connect with the control climate center, the control climate center and the burning
Tie control centre's connection.
7. a kind of ultrasonic wave added direct current sintering furnace as described in claim 1, it is characterised in that: the ultrasonic wave added direct current sintering
Furnace further includes cooling water recirculation system；
The cooling water recirculation system includes water inlet, water outlet, cooling water circulation channel and cooling water control center；
The water inlet is located at the bottom of furnace body, and the water outlet is located at the top of the furnace body, the cooling water circulation channel
It is set to the furnace interior, and is connected to the inlet and outlet；
The cooling water control center is connect with the sintering control centre.
8. a kind of ultrasonic wave added direct current sintering furnace as described in claim 1, it is characterised in that: the ultrasonic wave added direct current sintering
Furnace further includes temp measuring system, and the temp measuring system includes thermometric window and thermometric center；The thermometric window is located at the furnace body
Middle part；The thermometric center is sent to described by the temperature of material to be sintered in furnace body described in the thermometric windows detecting
It is sintered control centre.
9. a kind of ultrasonic wave added direct current sintering furnace as described in claim 1, it is characterised in that: the furnace body includes being bolted
Upper bell, furnace body and lower bell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920169399.4U CN209726776U (en) | 2019-01-30 | 2019-01-30 | A kind of ultrasonic wave added direct current sintering furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920169399.4U CN209726776U (en) | 2019-01-30 | 2019-01-30 | A kind of ultrasonic wave added direct current sintering furnace |
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| CN209726776U true CN209726776U (en) | 2019-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682202A (en) * | 2019-01-30 | 2019-04-26 | 清华大学 | A kind of ultrasonic wave added direct current sintering furnace and sintering method |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682202A (en) * | 2019-01-30 | 2019-04-26 | 清华大学 | A kind of ultrasonic wave added direct current sintering furnace and sintering method |
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Granted publication date: 20191203 Termination date: 20220130 |