CN113154882A - Non-pressure rapid sintering device and method for 3D printing - Google Patents

Non-pressure rapid sintering device and method for 3D printing Download PDF

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CN113154882A
CN113154882A CN202110460023.0A CN202110460023A CN113154882A CN 113154882 A CN113154882 A CN 113154882A CN 202110460023 A CN202110460023 A CN 202110460023A CN 113154882 A CN113154882 A CN 113154882A
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sintering
control system
electrode
graphite
furnace body
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CN113154882B (en
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张庆茂
蔡鹏�
郭亮
刘亮志
郑章鉴
甘甜
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South China Normal University
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South China Normal University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0056—Regulation involving cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The invention relates to the technical field of 3D printing, in particular to a pressureless rapid sintering device and a sintering method for 3D printing. The pressureless rapid sintering device comprises a furnace body, a base, an upper electrode, a lower electrode, an upper graphite electrode, a lower graphite electrode, a sintering mold, a current control system and a sintering control system; the upper graphite electrode and the lower graphite electrode are respectively positioned at two ends of the sintering mold, the upper graphite electrode and the lower graphite electrode are respectively connected with the upper electrode and the lower electrode, and the lower electrode is separated from the furnace body through the base; the current control system is connected with the upper electrode and the lower electrode and is used for controlling the voltage and the current of the upper electrode and the lower electrode; the sintering control system is connected with the current control system and is used for controlling the starting of the equipment and the parameters of the sintering process. The invention effectively solves the problem that the existing rapid sintering equipment cannot be used for sintering a 3D printing complex structural member, greatly improves the production and research and development efficiency, and can obtain a 3D printing product with special performance of nanocrystalline ceramics.

Description

Non-pressure rapid sintering device and method for 3D printing
Technical Field
The invention relates to the technical field of 3D printing, in particular to a pressureless rapid sintering device and a sintering method for 3D printing.
Background
The 3D printing is an additive manufacturing technology based on a discrete/stack forming principle, a mold is not needed in the forming process, rapid manufacturing of parts with complex structures such as hollow parts and thin walls can be achieved, and the method has wide application prospects in the fields of micro-fluidic chips, micromachines, aerospace, automobiles and the like and is one of current research hotspots. After the ceramic material is processed by 3D printing technologies such as photocuring forming, adhesive injection forming, extrusion forming and the like, a sintering treatment process is also needed. Sintering is one of the most critical steps in the preparation process of advanced structural and functional materials such as high-performance ceramics.
The rapid sintering not only can improve the production efficiency and reduce the energy consumption, but also can obtain materials with special properties, such as nanocrystalline ceramics, and the like, and is the research direction of the current domestic and foreign concerns. The rapid sintering can inhibit neck growth and low-efficiency loss of sintering activation energy caused by surface diffusion at the initial stage of sintering in the heating process through a very fast heating rate, so that a blank body retains stronger sintering activity and substance diffusion speed in the middle stage of sintering, and the sintering densification rate is improved. The sintering temperature can be reduced to a certain extent and the sintering time can be greatly shortened by rapidly raising the temperature, and the whole process can be completed even within seconds. Because the sintering time is short, the grain growth is inhibited in the sintering process, and a sintered product with finer grains can be obtained.
Current rapid sintering techniques mainly include microwave sintering (MW), Spark Plasma Sintering (SPS), and flash Firing (FS). The microwave sintering depends on the microwave absorption characteristics of the material, and the application range is narrow. The SPS technique requires a die to constrain the sintering material during sintering, and only can obtain products with simple structures such as sheets, rods and the like. The flash firing needs to coat conductive electrodes on two sides of a sample, certain pollution is caused to the sample, and the shape mainly is dog-bone shape and disc shape, so that the rapid sintering of a complex structural part is difficult to realize.
Disclosure of Invention
In view of the above, there is a need to provide a pressureless rapid sintering apparatus and a sintering method for 3D printing, which are used for sintering a complex structural member printed by a 3D printing technology, and increase the sintering rate of pressureless sintering, thereby improving the production and research and development efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a pressureless rapid sintering device for 3D printing, comprising a furnace body, a base, an upper electrode, a lower electrode, an upper graphite electrode, a lower graphite electrode, a sintering mold, a current control system and a sintering control system;
the upper graphite electrode and the lower graphite electrode are respectively positioned at two ends of the sintering mold, the upper graphite electrode and the lower graphite electrode are respectively connected with the upper electrode and the lower electrode, and the lower electrode is separated from the furnace body through the base;
the current control system is connected with the upper electrode and the lower electrode and is used for controlling the voltage and the current of the upper electrode and the lower electrode;
the sintering control system is connected with the current control system and is used for controlling the starting of the equipment and the parameters of the sintering process.
Further, in the non-pressure rapid sintering device for 3D printing, the sintering mold includes an upper graphite cushion block, a hollow cylindrical graphite mold, a setter plate, a heat insulation block, and a lower graphite cushion block; the upper graphite cushion block and the lower graphite cushion block are respectively connected with the upper graphite electrode and the lower graphite electrode; the upper graphite cushion block, the hollow cylindrical graphite mould and the lower graphite cushion block form a sealed sintering chamber; the heat insulation block is positioned in the sintering chamber and is arranged above the lower graphite cushion block; the burning bearing plate is positioned above the heat insulation block and used for placing a green body to be sintered; the heat insulation block separates the burning board from the bottom of the sintering mold, so that the green body to be sintered on the burning board is heated more uniformly.
Further, in the above pressureless rapid sintering device for 3D printing, the sintering mold further includes a temperature measuring element disposed on an outer surface of the hollow cylindrical graphite mold. The temperature of the sintering die can be measured and controlled by the temperature measuring element.
Further, in the non-pressure rapid sintering device for 3D printing, the sintering device further comprises an atmosphere control system, and the furnace body is provided with an air inlet and an air outlet; the atmosphere control system is communicated with the interior of the furnace body through an air inlet and an air outlet on the furnace body; the atmosphere control system can control the interior of the furnace body to be vacuum or atmosphere environment.
Further, in the above pressureless rapid sintering apparatus for 3D printing, the sintering apparatus further includes a cooling control system; the cooling control system is connected with the furnace body, the base, the upper electrode, the lower electrode, the current control system, the atmosphere control system and the sintering control system through the cooling water channel, and can help heat dissipation and accelerate cooling speed.
Further, in the non-pressure rapid sintering device for 3D printing, the current control system is a direct current power supply, a direct current pulse power supply or an alternating current power supply.
In a second aspect, the present invention provides a sintering method of the above pressureless rapid sintering apparatus for 3D printing, including the following steps:
(1) preparing a green body to be sintered by a 3D printing technology;
(2) placing the prepared green body to be sintered on a sintering bearing plate of a sintering mold;
(3) starting the equipment through a sintering control system; then starting a cooling control system; vacuumizing the furnace body or introducing inert gas through an atmosphere control system;
(4) inputting sintering technological parameters through a sintering control system, and operating a sintering program;
(5) and after sintering is finished, stopping the atmosphere control system after the temperature of the sintering mold is reduced to room temperature, and taking out the sintered product after the furnace body recovers to the atmospheric environment.
Further, in the sintering method, the sintering process parameters include sintering temperature, heating rate, holding time and cooling mode.
Further, in the above sintering method, the inert gas is nitrogen, argon or helium.
Further, in the sintering method, the cooling mode may be natural cooling or temperature-controlled cooling.
The invention has the beneficial effects that:
1. the invention provides a non-pressure rapid sintering device and a sintering method for 3D printing, which can effectively solve the problem that the conventional rapid sintering equipment cannot be used for sintering a 3D printing complex structural part, so that the production and research and development efficiency is greatly improved, and 3D printing products with special performances such as nanocrystalline ceramics and the like can be obtained through rapid sintering.
2. The traditional spark plasma sintering equipment or hot pressing equipment needs to apply load force on two ends of a sample, so that only quick sintering of the sample with simple structure such as a sheet shape, a rod shape and the like can be realized, and a complex pressure control system is needed, so that the equipment has complex structure, difficult operation and high price. Compared with the traditional discharge plasma equipment or hot-pressing equipment, the pressureless rapid sintering device provided by the invention has the advantages of simple structure and cost saving.
3. Compared with the conventional pressureless sintering device which is used for sintering in a furnace body, the pressureless rapid sintering device for 3D printing provided by the invention has the advantages that the sample is rapidly heated by concentrated heat release of the sintering mold to the internal narrow space, the heating rate can reach more than 500 ℃/min, and the heating rate of the conventional pressureless sintering device is generally not more than 20 ℃/min.
Drawings
FIG. 1 is a schematic structural diagram of a pressureless rapid sintering apparatus according to the present invention;
FIG. 2 is a schematic representation of a green body to be sintered and a sintered product in example 1 of the present invention;
FIG. 3 is a physical diagram of a green body to be sintered in examples 2 and 3 of the present invention;
FIG. 4 is a physical representation of the sintered product of examples 2 and 3 of the present invention;
the respective labels in FIG. 1 are as follows:
1-an upper electrode, 2-an upper graphite electrode, 3-an upper graphite cushion block, 4-a hollow cylindrical graphite mold, 5-a green body to be sintered, 6-a burning bearing plate, 7-a heat insulation block, 8-a lower graphite cushion block, 9-a lower graphite electrode, 10-a lower electrode, 11-a base, 12-a temperature measuring element, 13-a furnace body, 14-a current control system, 15-a cooling control system, 16-a sintering control system, 17-an atmosphere control system and 18-a sintering mold.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be further clearly and completely described below with reference to the embodiments of the present invention. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the scope of the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a pressureless rapid sintering apparatus for 3D printing, which includes a furnace body 13, a base 11, an upper electrode 1, a lower electrode 10, an upper graphite electrode 2, a lower graphite electrode 9, a sintering mold 18, a current control system 14, and a sintering control system 16;
the upper graphite electrode 2 and the lower graphite electrode 9 are respectively positioned at two ends of the sintering mold 18, the upper graphite electrode 2 and the lower graphite electrode 9 are respectively connected with the upper electrode 1 and the lower electrode 10, and the lower electrode 10 is separated from the furnace body 13 through a base 11;
the current control system 14 is connected with the upper electrode 1 and the lower electrode 10 and is used for controlling the voltage and the current of the upper electrode 1 and the lower electrode 10;
the sintering control system 16 is connected to the current control system 14 for controlling the start-up of the apparatus and the sintering process parameters.
The sintering mold 18 comprises an upper graphite cushion block 3, a hollow cylindrical graphite mold 4, a burning bearing plate 6, a heat insulation block 7 and a lower graphite cushion block 8; the upper graphite cushion block 3 and the lower graphite cushion block 8 are respectively connected with the upper graphite electrode 2 and the lower graphite electrode 9; the upper graphite cushion block 3, the hollow cylindrical graphite mould 4 and the lower graphite cushion block 3 form a sealed sintering chamber; the heat insulation block 7 is positioned in the sintering chamber and is arranged above the lower graphite cushion block 8; the setter plate 6 is located above the heat insulation block 7.
Wherein the sintering mold 18 further comprises a temperature measuring element 12 arranged on the outer surface of the hollow cylindrical graphite mold 4.
Wherein, the pressureless rapid sintering device also comprises an atmosphere control system 17 and a cooling control system 15; the atmosphere control system 17 is communicated with the interior of the furnace body 13 through an air inlet and an air outlet on the furnace body 13; for controlling the interior of the furnace body 13 to be vacuum or atmospheric environment. The cooling control system 15 is connected with the furnace body 13, the base 11, the upper electrode 1, the lower electrode 10, the current control system 14, the atmosphere control system 17 and the sintering control system 16 through a cooling water channel, so that heat dissipation can be facilitated and the cooling speed can be increased; the pressureless rapid sintering device for 3D printing of the present embodiment adopts the following sintering method: the method comprises the following steps:
(1) preparing a green body 5 to be sintered by a photocuring 3D printing technology;
(2) placing the prepared green body 5 to be sintered on a burning bearing plate 6 of a sintering mold 18;
(3) starting the apparatus by the sintering control system 16; the cooling control system 15 is then turned on; the furnace body 13 is vacuumized through an atmosphere control system 17;
(4) inputting sintering process parameters through a sintering control system 16, setting the sintering temperature to 1250 ℃, the heat preservation time to 20min, and the heating rate to 312.5 ℃/min, and operating a sintering program;
(5) after sintering, the atmosphere control system 17 is stopped after the temperature of the sintering mold 18 is reduced to room temperature, and the sintered product is taken out after the furnace body 13 is restored to the atmospheric environment. The sintered material of this example is silica and the green body to be sintered and the sintered product are shown in fig. 2a and 2 b.
Example 2
A pressureless rapid sintering device for 3D printing has the same structure as embodiment 1.
The following sintering method was used in this example:
(1) preparing a green body 5 to be sintered by a photocuring 3D printing technology;
(2) placing the prepared green body 5 to be sintered on a burning bearing plate 6 of a sintering mold 18;
(3) starting the apparatus by the sintering control system 16; the cooling control system 15 is then turned on; the furnace body 13 is vacuumized through an atmosphere control system 17;
(4) inputting sintering process parameters through a sintering control system 16, setting the sintering temperature to be 1500 ℃, the heat preservation time to be 5min, and the heating rate to be 150 ℃/min, and operating a sintering program;
(5) after sintering, the atmosphere control system 17 is stopped after the temperature of the sintering mold 18 is reduced to room temperature, and the sintered product is taken out after the furnace body 13 is restored to the atmospheric environment. The sintered material of this example is alumina and the green body to be sintered and the sintered product are shown in fig. 3a and 4 a.
Example 3
A pressureless rapid sintering device for 3D printing has the same structure as embodiment 1.
The following sintering method was used in this example:
(1) preparing a green body 5 to be sintered by a photocuring 3D printing technology;
(2) placing the prepared green body 5 to be sintered on a burning bearing plate 6 of a sintering mold 18;
(3) starting the apparatus by the sintering control system 16; the cooling control system 15 is then turned on; the furnace body 13 is vacuumized through an atmosphere control system 17;
(4) inputting sintering process parameters through a sintering control system 16, setting the sintering temperature to 1450 ℃, the heat preservation time to 5min, and the heating rate to 145 ℃/min, and operating a sintering program;
(5) after sintering, the atmosphere control system 17 is stopped after the temperature of the sintering mold 18 is reduced to room temperature, and the sintered product is taken out after the furnace body 13 is restored to the atmospheric environment. The sintered material of this example is zirconia and the green body to be sintered and the sintered product are shown in fig. 3b and 4 b.
Comparative example 1
The same 3D printed silicon oxide green body to be sintered as in example 1 was sintered using spark plasma sintering equipment, and the discharge plasma sintering loaded pressure on the green body to be sintered caused the destruction of the complex structure of the green body to be sintered.
Comparative example 2
The same 3D printed body of silicon oxide to be sintered as in example 1 was sintered using a conventional pressureless sintering apparatus (GF16Q, tokyo intrinsic instrument science and technology ltd), with a sintering curve of raising the temperature to 1000 ℃ at 5 ℃/min, then raising the temperature to 1250 ℃ at 3 ℃/min and holding the temperature for 1.5 h. And cooling along with the furnace after sintering.
The experimental results are as follows: the sintered sample shape remained intact, but the sintering time for comparative example 2 was approximately 24h, while the time for rapid sintering for example 1 was approximately 30 min.
Comparative example 3
The same 3D printed aluminum oxide green body to be sintered as in example 2 was sintered using a conventional pressureless sintering apparatus (GF16Q, tokyo intrinsic instrument science and technology ltd) with a sintering curve of raising the temperature to 1500 ℃ at 5 ℃/min and maintaining the temperature for 3 h. And cooling along with the furnace after sintering.
The experimental results are as follows: the sintered sample shape remained intact, but the sintering time for comparative example 3 was approximately 24h, while the time for rapid sintering for example 2 was approximately 30 min.
Comparative example 4
The same 3D printed zirconia green body to be sintered as in example 3 was sintered using a conventional pressureless sintering apparatus (GF16Q, tokyo intrinsic instrument science and technology ltd) with a sintering curve of 5 ℃/min up to 1450 ℃ and 3h of incubation. And cooling along with the furnace after sintering.
The experimental results are as follows: the sintered sample shape remained intact, but the sintering time for comparative example 4 was approximately 24h, while the time for rapid sintering for example 3 was approximately 30 min.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A pressureless rapid sintering device for 3D printing is characterized by comprising a furnace body, a base, an upper electrode, a lower electrode, an upper graphite electrode, a lower graphite electrode, a sintering mold, a current control system and a sintering control system;
the upper graphite electrode and the lower graphite electrode are respectively positioned at two ends of the sintering mold, the upper graphite electrode and the lower graphite electrode are respectively connected with the upper electrode and the lower electrode, and the lower electrode is separated from the furnace body through the base;
the current control system is connected with the upper electrode and the lower electrode and is used for controlling the voltage and the current of the upper electrode and the lower electrode;
the sintering control system is connected with the current control system and is used for controlling the starting of the equipment and the parameters of the sintering process.
2. The pressureless rapid sintering device for 3D printing according to claim 1, wherein the sintering mold comprises an upper graphite block, a hollow cylindrical graphite mold, a setter plate, a heat insulation block, and a lower graphite block; the upper graphite cushion block and the lower graphite cushion block are respectively connected with the upper graphite electrode and the lower graphite electrode; the upper graphite cushion block, the hollow cylindrical graphite mould and the lower graphite cushion block form a sealed sintering chamber; the heat insulation block is positioned in the sintering chamber and is arranged above the lower graphite cushion block; the burning bearing plate is positioned above the heat insulation block.
3. The pressureless rapid sintering device for 3D printing according to claim 2, wherein the sintering mold further comprises a temperature measuring element disposed on an outer surface of the hollow cylindrical graphite mold.
4. The pressureless rapid sintering device for 3D printing according to claim 1, further comprising an atmosphere control system, wherein the furnace body is provided with an air inlet and an air outlet; the atmosphere control system is communicated with the interior of the furnace body through an air inlet and an air outlet on the furnace body; the atmosphere control system can control the interior of the furnace body to be vacuum or atmosphere environment.
5. The pressureless rapid sintering device for 3D printing according to claim 4, wherein the sintering device further comprises a cooling control system; the cooling control system is connected with the furnace body, the base, the upper electrode, the lower electrode, the current control system, the atmosphere control system and the sintering control system through a cooling water channel.
6. The pressureless rapid sintering device for 3D printing according to claim 1, wherein the current control system is a direct current power supply, a direct current pulse power supply, or an alternating current power supply.
7. The sintering method of the pressureless rapid sintering device for 3D printing according to any one of claims 1 to 6, comprising the following steps:
(1) preparing a green body to be sintered by a 3D printing technology;
(2) placing the prepared green body to be sintered on a sintering bearing plate of a sintering mold;
(3) starting the equipment through a sintering control system; then starting a cooling control system; vacuumizing the furnace body or introducing inert gas through an atmosphere control system;
(4) inputting sintering technological parameters through a sintering control system, and operating a sintering program;
(5) and after sintering is finished, stopping the atmosphere control system after the temperature of the sintering mold is reduced to room temperature, and taking out the sintered product after the furnace body recovers to the atmospheric environment.
8. The sintering method according to claim 7, wherein the sintering process parameters comprise sintering temperature, heating rate, holding time and cooling mode.
9. The sintering method according to claim 7, wherein the inert gas is nitrogen, argon or helium.
10. The sintering method according to claim 7, wherein the cooling mode is natural cooling or temperature-controlled cooling.
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CN103819202A (en) * 2014-01-14 2014-05-28 苏州永佳超硬耐磨材料有限公司 Ceramic material sintering furnace and isostatic pressing field-controlled spark pulse sintering method
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CN106312067A (en) * 2016-10-11 2017-01-11 河海大学 Graphite die for pressureless spark plasma sintering
CN107498038A (en) * 2017-08-09 2017-12-22 河海大学 Multicarity pressureless sintering graphite jig
CN111981847A (en) * 2020-07-24 2020-11-24 北京科技大学 Pressure-assisted induction heating vacuum atmosphere flash sintering device
CN111912227A (en) * 2020-07-30 2020-11-10 清华大学 Rapid sintering equipment and sintering method for dynamically loading coupled alternating current

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