CN202942867U - Device for rapidly preparing powder assisted by current - Google Patents
Device for rapidly preparing powder assisted by current Download PDFInfo
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- CN202942867U CN202942867U CN 201220325988 CN201220325988U CN202942867U CN 202942867 U CN202942867 U CN 202942867U CN 201220325988 CN201220325988 CN 201220325988 CN 201220325988 U CN201220325988 U CN 201220325988U CN 202942867 U CN202942867 U CN 202942867U
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- end cover
- reaction cavity
- pressure head
- cavity
- electric current
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Abstract
The utility model provides a device for rapidly preparing powder assisted by current. The device comprises a reaction cavity, an upper electrode pressure head and a lower electrode pressure head which are connected with two ends of the reaction cavity and which are used for fast warming the reaction cavity by inputting direct current or high-frequency pulse current, and a thermometer hole arranged on the reaction cavity and used for placing a thermometer component for monitoring the temperature in the reaction cavity, wherein the reaction cavity is an enclosed space formed by the cavity side wall, the upper end cover and the lower end cover, the upper end cover is connected with the upper electrode pressure head, the lower end cover is connected with the lower electrode pressure head, when the device is in the working state, the pressure produced by the upper electrode pressure head and the lower electrode pressure head is born by the cavity side wall, the upper end cover and the lower end cover, and the volume of the enclosed space is invariant. The device provided by the utility model can be used for conveniently and rapidly preparing metal powder, ceramic powder and the like, and has a good application prospect.
Description
Technical field
The utility model relates to the Preparation Technique of Powders fields such as metal, pottery, relates in particular to the auxiliary quick powder preparation facilities of a kind of electric current.
Background technology
Electric current assisted sintering technology (EAST) is to utilize DC current or high-frequency pulse current to realize being rapidly heated, and the sintering process of high thermal efficiency is exerted pressure to realize in the electrode two ends simultaneously.This sintering processing claims again electric field assisted sintering (EFS), electric field activated sintering (EAS), pulse current activation pressure sintering (PECPS) and discharge plasma sintering (SPS) etc.
At present, can realize the device of electric current assisted sintering technology as shown in Figure 1, mainly comprise be used to the reaction cavity 1 of placing material to be sintered, the upper/lower electrode pressure head 2 and 3 that is arranged on reaction cavity 1 two ends, reaction cavity 1 is rapidly heated by input direct-current electric current or high-frequency pulse current, and be positioned on the reaction cavity 1, be used for placing temperature-measuring part with the thermometer hole 4 of monitoring reaction cavity 1 temperature; Wherein, as shown in Figure 2, reaction cavity 1 is the enclosure space that is surrounded by cavity wall 7, upper end cover 5 and bottom end cover 6, upper end cover 5 is connected with top electrode pressure head 2, bottom end cover 6 is connected with bottom electrode pressure head 3, and upper end cover 5 is or/and bottom end cover 6 can be along the cavity wall upper and lower displacement, namely the volume of described enclosure space with upper end cover 5 or/and the upper and lower displacement of bottom end cover 6 change.This installs when in running order, the question response material is placed in the reaction cavity 1, input direct-current electric current or high-frequency pulse current between top electrode pressure head 2 and the bottom electrode pressure head 3, reaction cavity 1 is rapidly heated, simultaneously upper end cover 5 and bottom end cover 6 since bear top electrode pressure head 2 with the load of bottom electrode pressure head 3 along cavity wall downwards with to top offset, namely not only treat reaction material and realized sintering process, also it has been realized mould pressing process.Therefore, this device is applicable to realize the quick densifying of metal, ceramic material, especially having unique advantage for block materials such as realizing nanocrystalline ceramics, superhigh temperature structural ceramics, texturing function and structural ceramics, thermoelectric functional material, intermetallic compound, carbide alloy, high-performance metal target material, glass-metal material, nonequilibrium state solid material, is the quantum jump in sintering technology field in recent years.
This seminar is explored on the basis in long-term scientific research, need in conjunction with present application, propose recently, electric current assisted sintering technology is used in the Preparation Technique of Powders fields such as metal, pottery, make powder in electric current assisted sintering process, experience the processes such as phase transformation, solid phase reaction, thereby obtain required powder.But, when adopting above-mentioned electric current assisted sintering device that powder is carried out sintering, because the design feature of present reaction cavity, although powder has experienced the processes such as phase transformation, solid phase reaction in sintering process, finally but can only obtain full densification or the fine and close block of part that sintering forms, but not keep former powder morphology.
The utility model content
Technical purpose of the present utility model is for utilizing above-mentioned electric current assisted sintering device can only obtain the deficiency of block materials, a kind of quick powder preparation facilities is provided, this device can be realized the quick preparation of the powders such as metal, pottery quickly and easily based on electric current assisted sintering principle.
The utility model realizes that the technical scheme that above-mentioned purpose adopts is: a kind of electric current is assisted quick powder preparation facilities, comprise for the reaction cavity of placing powder, the upper and lower electrode pressure head that is arranged on the reaction cavity two ends, reaction cavity is rapidly heated by input direct-current electric current or high-frequency pulse current, and be positioned on the reaction cavity, be used for placing temperature-measuring part with the thermometer hole of monitoring reaction cavity temperature; Wherein, reaction cavity is the enclosure space that is surrounded by cavity wall, upper end cover and bottom end cover, upper end cover is connected with the top electrode pressure head, bottom end cover is connected with the bottom electrode pressure head, in the time of in working order, the pressure that top electrode pressure head and bottom electrode pressure head produce is born by cavity wall, upper end cover and bottom end cover, and the volume of the enclosure space that described cavity wall, upper end cover and bottom end cover surround immobilizes.
As a kind of optimal technical scheme, as shown in Figure 3, the cross section of a certain position of upper end cover is greater than the reaction cavity interior diameter, it is the diameter of reaction cavity inwall enclosed space, can make upper end cover be buckled in cavity wall top, the cross section of a certain position of bottom end cover can make bottom end cover be buckled in the cavity wall bottom greater than the reaction cavity interior diameter, thereby keeps the volume of enclosure space to immobilize.
As another kind of optimal technical scheme, as shown in Figure 4, bottom end cover and cavity wall are combined as a whole, and the cross section of a certain position of upper end cover is greater than the reaction cavity diameter, can make upper end cover be buckled in cavity wall top, thereby keep the volume of enclosure space to immobilize.
In the technique scheme, the shape of the enclosure space that described cavity wall, upper end cover and bottom end cover surround is not limit, include but not limited to cylindrical, cross section be rectangle, square, triangle, trapezoidal, other are regular or erose column structure.
Described cavity wall, upper end cover and bottom end cover are made by the high-melting-point conductive material respectively, include but not limited to be made by graphite material.
As preferably, described thermometer hole is arranged on upper end cover or bottom end cover position.
As preferably, described temperature-measuring part is upper infrared radiation thermometer; Described temperature-measuring part is directly measured the temperature of powder in the reaction cavity, perhaps measures the temperature on reaction cavity surface.
As preferably, at the flushing outer temperature measurer of reaction cavity sidewall additional side, to measure the reaction cavity side wall temperatures, perhaps add and the contacted thermocouple temperature measurement of cavity.
In sum, the utility model provides a kind of electric current to assist quick powder preparation facilities, this device has improved the reaction cavity of existing electric current assisted sintering device for block preparation, to be designed to be born by cavity wall, upper end cover and bottom end cover by the reaction cavity of the adjustable sealing of the volume that cavity wall, upper end cover and bottom end cover surround the contact of upper/lower electrode pressure head, and the changeless reaction cavity structure of maintenance enclosure space volume, thereby the auxiliary Fast Sintering of the electric current that can realize the powders such as metal, pottery has following advantage:
(1) by being rapidly heated of direct current or high-frequency pulse current realization response cavity is provided, provide the powder reaction required thermal environment, be conducive to that powder is rapidly heated, fast reaction, greatly shorten powder and prepared required time;
(2) can obtain arbitrary temp in 400～2200 degrees centigrade, can adopt inert atmosphere and reaction atmosphere, and can realize condition of high vacuum degree; Heating rate is controlled between 1～400 degrees celsius/minute;
(3) be applicable to conduction, non-conductive powder or hybrid conductive powder;
For non-conductive powder, powder is among the reaction cavity internal electric field; For conductive powder or hybrid conductive powder, the electric current that electric current assisted sintering device provides is at the reaction cavity powder of flowing through, with electric field (electric current) coupling of powder generation, thereby solid phase reaction is produced special effect, further realize low temperature, fast powder reaction;
(4) simplicity of design, practicality can realize the basic structure transformation of existing electric current assisted sintering equipment, have expanded the function of electric current assisted sintering equipment, and can realize the quick preparation of powder;
(5) kinds of processes of utilizing the auxiliary quick powder preparation facilities of this electric current can carry out the powder preparation comprises powder heat treatment (annealing and normalizing), solid-state phase changes, solid phase reaction is synthetic, the solid and gas two phase reaction is synthetic etc.
Description of drawings
Fig. 1 is existing electric current assisted sintering device schematic diagram;
Fig. 2 is the reaction cavity structural representation among Fig. 1;
Fig. 3 is the auxiliary quick powder preparation facilities structural representation of the electric current of the utility model embodiment 1;
Fig. 4 is the vertical section structure schematic diagram of reaction cavity in the auxiliary quick powder preparation facilities of the electric current of the utility model embodiment 1;
Fig. 5 is the vertical section structure schematic diagram of reaction cavity in the auxiliary quick powder preparation facilities of the electric current of the utility model embodiment 2.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail, it is pointed out that the following stated embodiment is intended to be convenient to understanding of the present utility model, and it is not played any restriction effect.
The drawing reference numeral of Fig. 1 to Fig. 5 is: 1, reaction cavity, 2, the top electrode pressure head, 3, the bottom electrode pressure head, 4, thermometer hole, 5, upper end cover, 6, bottom end cover, 7, cavity wall.
Embodiment 1:
In the present embodiment, the structural representation of the quick powder preparation facilities of electric current assisted sintering principle comprises as shown in Figure 3 for the reaction cavity 1 of placing powder, the upper/lower electrode pressure head 2 and 3 that links to each other with reaction cavity 1.Reaction cavity 1 is the enclosure space that is surrounded by cavity wall 7, upper end cover 5 and bottom end cover 6, and upper end cover 5 is connected with top electrode pressure head 2, and bottom end cover 6 is connected with bottom electrode pressure head 3, and the volume of this enclosure space is fixed.Arranging on the upper end cover 5 for placing the thermometer hole 4 of temperature-measuring part with monitoring reaction cavity 1 interior temperature, this temperature-measuring part is selected infrared radiation thermometer.
As shown in Figure 4, the cross section of a certain position of upper end cover 5 can make upper end cover 6 be buckled in the top of cavity wall 7 greater than the interior diameter of reaction cavity 1.The cross section of a certain position of bottom end cover 6 can make bottom end cover 6 be buckled in the bottom of cavity wall 7, thereby keep the volume of enclosure space to immobilize greater than the interior diameter of reaction cavity 1.
The method of utilizing the auxiliary quick powder preparation facilities of above-mentioned electric current to prepare powder comprises the steps:
1, opens reaction cavity 1, can place conduction or non-conductive crucible in reaction chamber 1 inside, powder is placed in the crucible;
2, the off-response cavity 1, keep the enclosure space volume of reaction cavity to immobilize, directly connect direct current or high-frequency pulse current at top electrode pressure head 2 and bottom electrode pressure head 3, electric current produces heat by reaction cavity, provide the powder reaction required thermal environment, being rapidly heated of realization response cavity 1, programming rate is by direct current or the control of high-frequency pulse current size;
3, measure the temperature of reaction cavity 1 interior powder by upper infrared radiation thermometer, powder heats up according to preset temperature, reaches required heating-up temperature and after this temperature is incubated the corresponding time, finishes the heating preparation process of powder until powder;
4, close current is opened reaction cavity after the device cooling, take out powder.
Embodiment 2:
In the present embodiment, the structural representation of the quick powder preparation facilities of electric current assisted sintering principle is as shown in Figure 3 similar, comprises for the reaction cavity 1 of placing powder, the upper/lower electrode pressure head 2 and 3 that links to each other with reaction cavity 1.Reaction cavity 1 is the enclosure space that is surrounded by cavity wall 7, upper end cover 5 and bottom end cover 6, and upper end cover 5 is connected with top electrode pressure head 2, and bottom end cover 6 is connected with bottom electrode pressure head 3, and the volume of this enclosure space is fixed.Arranging on the upper end cover 5 for placing the thermometer hole 4 of temperature-measuring part with monitoring reaction cavity 1 interior temperature, this temperature-measuring part is selected infrared radiation thermometer.
As shown in Figure 5, bottom end cover 6 is combined as a whole with cavity wall 7, and the cross section of upper end cover 5 a certain positions can make upper end cover 5 be buckled in the top of cavity wall 7, thereby keep the volume of enclosure space to immobilize greater than reaction cavity 1 diameter.
The method of utilizing the auxiliary quick powder preparation facilities of above-mentioned electric current to prepare powder comprises the steps:
1, opens reaction cavity 1, can place conduction or non-conductive crucible in reaction cavity 1 inside, powder is placed in the crucible;
2, the off-response cavity 1, keep the enclosure space volume of reaction cavity to immobilize, directly connect direct current or high-frequency pulse current at top electrode pressure head 2 and bottom electrode pressure head 3, electric current produces heat by reaction cavity, provide the powder reaction required thermal environment, being rapidly heated of realization response cavity 1, programming rate is by direct current or the control of high-frequency pulse current size;
3, measure the temperature of reaction cavity 1 interior powder by upper infrared radiation thermometer, when treating that the powder temperature reaches preset temperature, powder heats up according to preset temperature, reaches required heating-up temperature and after this temperature is incubated the corresponding time, finishes the heating preparation process of powder until powder;
4, close current is opened reaction cavity after the device cooling, take out powder.
Above-described embodiment has been described in detail the technical solution of the utility model; be understood that the above only is specific embodiment of the utility model; be not limited to the utility model; all any modifications of in principle scope of the present utility model, making, replenish or similar fashion substitutes etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. an electric current is assisted quick powder preparation facilities, comprise for the reaction cavity (1) of placing powder, the top electrode pressure head (2) and bottom electrode pressure head (3) that are arranged on reaction cavity (1) two ends, reaction cavity (1) are rapidly heated by input direct-current electric current or high-frequency pulse current, and be positioned at reaction cavity (1) upper, be used for placing temperature-measuring part with the thermometer hole (4) of monitoring reaction cavity (1) temperature; It is characterized in that: described reaction cavity (1) is the enclosure space that is surrounded by cavity wall (7), upper end cover (5) and bottom end cover (6), upper end cover (5) is connected with top electrode pressure head (2), bottom end cover (6) is connected with bottom electrode pressure head (3), during duty, top electrode pressure head (2) is born with bottom end cover (6) by cavity wall (7), upper end cover (5) with the pressure that bottom electrode pressure head (3) produces, and the volume of described enclosure space immobilizes.
2. electric current according to claim 1 is assisted quick powder preparation facilities, it is characterized in that: the cross section of a certain position of described upper end cover (5) is greater than reaction cavity (1) interior diameter, make upper end cover (5) be buckled in cavity wall (7) top, the cross section of a certain position of bottom end cover (6) makes bottom end cover (6) be buckled in cavity wall (7) bottom greater than reaction cavity (1) interior diameter.
3. electric current according to claim 1 is assisted quick powder preparation facilities, it is characterized in that: described bottom end cover (6) is combined as a whole with cavity wall (7), the cross section of a certain position of upper end cover (5) makes upper end cover (5) be buckled in cavity wall (7) top greater than reaction cavity (1) diameter.
4. the auxiliary quick powder preparation facilities of the described electric current of arbitrary claim in 3 according to claim 1, it is characterized in that: described cavity wall (7), upper end cover (5) are made by the high-melting-point conductive material respectively with bottom end cover (6).
5. electric current according to claim 4 is assisted quick powder preparation facilities, it is characterized in that: described cavity wall (7), upper end cover (5) are made by graphite material respectively with bottom end cover (6).
6. electric current according to claim 4 is assisted quick powder preparation facilities, and it is characterized in that: described thermometer hole (4) is arranged on upper end cover (5) or bottom end cover (6) position.
7. electric current according to claim 4 is assisted quick powder preparation facilities, and it is characterized in that: described temperature-measuring part is upper infrared radiation thermometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220325988 CN202942867U (en) | 2012-07-05 | 2012-07-05 | Device for rapidly preparing powder assisted by current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220325988 CN202942867U (en) | 2012-07-05 | 2012-07-05 | Device for rapidly preparing powder assisted by current |
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| CN202942867U true CN202942867U (en) | 2013-05-22 |
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| CN 201220325988 Expired - Lifetime CN202942867U (en) | 2012-07-05 | 2012-07-05 | Device for rapidly preparing powder assisted by current |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333731A (en) * | 2015-11-20 | 2016-02-17 | 燕山大学 | Discharge smelting device and smelting method for ZrTiAlV alloy |
| CN106197755A (en) * | 2016-08-22 | 2016-12-07 | 郑州磨料磨具磨削研究所有限公司 | Mold center's thermometry and hot-press sintering equipment |
| CN108089616A (en) * | 2017-12-25 | 2018-05-29 | 哈尔滨工业大学 | A kind of humidity control system of gauze reactor |
-
2012
- 2012-07-05 CN CN 201220325988 patent/CN202942867U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333731A (en) * | 2015-11-20 | 2016-02-17 | 燕山大学 | Discharge smelting device and smelting method for ZrTiAlV alloy |
| CN105333731B (en) * | 2015-11-20 | 2017-05-31 | 燕山大学 | A kind of method of smelting of discharge smelting apparatus and ZrTiAlV alloys |
| CN106197755A (en) * | 2016-08-22 | 2016-12-07 | 郑州磨料磨具磨削研究所有限公司 | Mold center's thermometry and hot-press sintering equipment |
| CN106197755B (en) * | 2016-08-22 | 2018-11-06 | 郑州磨料磨具磨削研究所有限公司 | Mold center's thermometry and hot-press sintering equipment |
| CN108089616A (en) * | 2017-12-25 | 2018-05-29 | 哈尔滨工业大学 | A kind of humidity control system of gauze reactor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130522 |