CN113878117A - Method for controlling growth orientation of metal solid phase reaction tissue by using electric field assistance - Google Patents
Method for controlling growth orientation of metal solid phase reaction tissue by using electric field assistance Download PDFInfo
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- 238000003746 solid phase reaction Methods 0.000 title claims abstract description 47
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- 238000000034 method Methods 0.000 title claims abstract description 26
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F3/00—Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
- B22F2003/1051—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding by electric discharge
Abstract
The invention discloses a method for controlling the growth orientation of a metal solid phase reaction tissue by using the assistance of an electric field, which comprises the following steps: step 1: selecting dissimilar metal to be reacted, and grinding and polishing the surface of the metal; step 2: cleaning and drying the dissimilar metal block in the step 1, pressing contact surfaces of two dissimilar metal samples tightly to enable the surfaces to be connected of the two dissimilar metal samples to be contacted and reacted, and applying direct current to the interfaces of the two dissimilar metal samples in the reaction process through discharge plasma sintering (SPS) or direct current power supply equipment; and step 3: and stopping applying the current after the preset reaction time is reached, and cooling the reaction system. In the process of the solid-solid interface reaction of dissimilar metals, strong direct current is applied to induce intermetallic compound grains generated by the solid-solid reaction to preferentially grow along a certain crystal direction, so that a novel method is provided for preparing the strong textured polycrystalline metal material.
Description
Technical Field
The invention relates to a method for regulating and controlling tissues by aid of an external field, in particular to a method for controlling growth orientation of a metal solid-phase reaction tissue by aid of an electric field.
Background
The metal material with preferred orientation has important application in the fields of light, electricity, magnetism and the like because of the special anisotropic property, but the preparation technology of the metal material is a difficult problem which always troubles the material world. At present, methods for preparing a polycrystalline metal material with preferred orientation include directional solidification, a pulling method and the like, but the methods have long growth period and low efficiency.
In recent years, the organization technology of the external field assisted regulation material is more and more emphasized, wherein the research of the microstructure of the metal material assisted regulation by the strong current has attracted extensive interest in academia. High currents tend to impart special microstructures and fine structures to the material. A large number of researches find that the texture of the metal material is changed remarkably when high current is applied in the processes of rolling, solidification, heat treatment and the like. If the researchers found that the texture of Fe-Si steel is transformed by applying pulse current in the cold rolling process. It has been reported that applying a certain current during the annealing treatment after cold rolling is advantageous for the formation of cubic texture in the cubic metal. Research shows that the titanium alloy is directly beneficial to being processed by pulse current, and the texture component of the titanium alloy is obviously different from that of the alloy which is not processed by the pulse current. Recently, the researchers found that the growth orientation of the Cu/Sn/Cu interface compounds (Cu3Sn, Cu6Sn5) under the action of high current density is closely related to the direction of current flow, and the intermetallic compound directionally grows along a certain crystal plane under the action of current. The researches provide a new idea for electric field auxiliary control of the crystal orientation of the material. The crystal growth orientation in the metal material is adjusted and controlled by the aid of an external field, so that the technical difficulty of preparing the preferred orientation polycrystalline metal material is undoubtedly greatly reduced.
Disclosure of Invention
Based on the vacancy of the prior external field assisted control crystal preferential growth technology, the invention provides a method for controlling the growth orientation of a metal solid phase reaction tissue by using an electric field, which specifically comprises the following steps:
a method for controlling the growth orientation of a metal solid phase reaction structure by using an electric field is characterized in that direct current is applied to a metal solid phase interface in the reaction process through Spark Plasma Sintering (SPS) or direct current power supply equipment to induce the crystal of the metal interface to grow preferentially, and finally a material with the preferred growth orientation is obtained.
Specifically, the method comprises the following steps:
step 1: selecting dissimilar metal to be reacted, and grinding and polishing the surface of the metal;
step 2: cleaning and drying the dissimilar metal block in the step 1, pressing contact surfaces of two dissimilar metal samples tightly to enable the surfaces to be connected of the two dissimilar metal samples to be contacted and reacted, and applying direct current to interfaces of the two dissimilar metal samples in a reaction process through Spark Plasma Sintering (SPS) or direct current power supply equipment;
and step 3: and stopping applying the current after the preset reaction time is reached, and cooling the reaction system until the temperature is cooled to the room temperature.
Specifically, in the step 2, after the dissimilar metal samples in the step 1 are cleaned and dried, the dissimilar metal samples are mutually overlapped and placed in a graphite mold to form a diffusion couple, an upper pressure head and a lower pressure head in the mold are used for pressing the samples, the surfaces to be connected of the two samples are ensured to be contacted, the contact surfaces of the two samples are aligned to temperature measurement holes of the graphite mold, and an infrared thermometer is used for measuring the temperature at the interface through the temperature measurement holes; then putting the graphite mold into an SPS furnace, opening a vacuum pump to ensure that the vacuum degree in the furnace is not higher than 10Pa, and setting the solid phase reaction parameters of two metal samples: the contact surface pressure of the two metal samples is 15MPa-40MPa, the temperature rising speed in the furnace is 50 ℃/min-200 ℃/min, the temperature rising is stopped after the temperature rises to the set heat preservation temperature, the heat preservation temperature is 500 ℃ to 1800 ℃, the heat preservation time is 10min-120min, and after the parameters are set, the current starts to be introduced.
Specifically, in the step 2, after the dissimilar metal samples in the step 1 are cleaned and dried, the dissimilar metal samples are mutually superposed to form a diffusion couple, so that the surfaces to be connected of the two samples are ensured to be in contact; then pre-pressing the diffusion couples for 0.5min-2min to connect the diffusion couples; and then putting the diffusion couple into heating equipment filled with protective gas, heating to a certain temperature, preserving heat, and introducing direct current at two ends of the diffusion couple.
Specifically, a hot pressing device or an SPS device is adopted to carry out pre-pressing treatment on the diffusion couple.
Specifically, the heating equipment is a tube furnace, and the protective gas is argon.
Specifically, the heating rate of the heating equipment is 50-200 ℃/min, the heat preservation temperature is 500-1800 ℃, and the heat preservation time is 10-120 min.
Specifically, the current density of the direct current is 100A/cm2-5000A/cm2The voltage is 1V-12V, and the electrifying time is 5min-120 min.
Specifically, the dissimilar metal sample is W/Co, Cu/Al, Ti/Ni, Ti/Al or Fe/Al.
The invention has the beneficial effects that: in the process of the solid-solid interface reaction of dissimilar metals, strong direct current is applied to induce intermetallic compound grains generated by the solid-solid reaction to preferentially grow along a certain crystal direction. That is, intermetallic compound crystal grains generated by solid phase reaction of dissimilar metal interface under the action of strong current have the characteristic of preferentially growing along a certain specific orientation, and finally, a preferred orientation structure with completely consistent orientation height is obtained. Provides a new method for preparing the strong textured polycrystalline metal material.
Drawings
FIG. 1 is a W/Co high temperature solid phase reaction interface structure treated by SPS and a conventional hot pressing sintering furnace in example 1;
FIG. 1(a) is an EBSD phase distribution diagram of a W/Co high-temperature solid-phase reaction interface;
FIG. 1(b) is a crystal grain orientation diagram of W/Co high-temperature solid-phase reaction interface;
FIG. 1(c) is a reverse polarity diagram of the W/Co high temperature solid phase reaction interface orientation;
FIG. 2 is an orientation diagram of the Cu/Al high temperature solid phase reaction interface structure and EBSD treated by SPS and a conventional hot pressing sintering furnace in example 2;
FIG. 3 is a diagram of a W/Fe high temperature solid phase reaction apparatus and an interface structure processed by a regulated DC power supply in example 3.
Detailed Description
The present invention will be described in detail with reference to the accompanying fig. 1 to 3 and the embodiments. The embodiments shown below do not limit the inventive content described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Example 1
An industrial pure tungsten piece and a high-purity cobalt piece are used as raw materials and processed into a wafer with the thickness of 3mm and the diameter of 20 mm. And (3) grinding the wafer by using 600#, 800#, 1500# and 2000# sandpaper respectively, cleaning by using absolute ethyl alcohol, and drying for later use. The welded surfaces of the W, Co round pieces were polished with 3000# sandpaper to remove surface oxide films and then overlapped with each other for diffusion reaction. A discharge plasma sintering furnace (HP D25, FCT System GmbH, Rauenstein) of Germany FCT company is adopted, a vacuum pump is started to ensure that the vacuum degree in the furnace is not higher than 10Pa, the pressure between samples is set to be 15MPa, the temperature rise rate in the furnace is 100 ℃/min, the solid phase reaction temperature is set to be 1000-1200 ℃, and the heat preservation time is respectively 10min, 30 min, 60min and 90 min. In order to compare W, Co solid phase reaction structure under the traditional heating mode, the W/Co is processed under the same temperature by adopting a traditional atmosphere furnace.
And cutting the sample into a required size after the solid-phase reaction to prepare the metallographic sample. EBSD is adopted to characterize the crystal orientation of the intermetallic compound phase at the diffusion interface. As shown in FIG. 1, the grains of the solid-solid reaction layer formed on the W/Co interface after the SPS strong current treatment are all columnar grains, which are completely different from the irregular grains of the reaction structure formed under the no current action of the traditional high-temperature atmosphere furnace. In addition, through EBSD characterization, the reaction formed under the action of SPS current has a remarkable preferred growth orientation, and the preferred growth orientation of the reaction in an X-Y plane is [0001 ]]Calculated preferred growth orientation in the direction of current flow is
(and their equivalent crystal orientations). While the solid phase reaction tissue of the traditional hot pressing treatment has no preferred growth orientation.
Example 2
Pure copper and pure aluminum metal were processed into wafers 3mm thick and 20mm in diameter. Sanding with 600#, 800#, 1500# and 2000# sandpaper, cleaning with absolute ethyl alcohol, and drying for later use. The copper sheet and the aluminum sheet are mutually overlapped and loaded into a graphite die, the graphite die is subjected to heat treatment by adopting a discharge plasma sintering furnace (HP D25, FCT System GmbH, Rauenstein) of Germany FCT company, a vacuum pump is started to ensure that the vacuum degree in the furnace is not higher than 10Pa, the pressure between samples is set to be 40MPa, the heating rate is 50 ℃/min, the solid phase reaction temperature is 500 ℃, and the heat preservation time is 60 min. Meanwhile, the Cu/Al combination pattern is processed by a traditional hot-pressing sintering furnace at the same temperature.
And cutting the sample into a required size after the solid-phase reaction to prepare the metallographic sample. EBSD is adopted to characterize the crystal orientation of the intermetallic compound phase at the diffusion interface. As a result, as shown in FIG. 2, a solid-solid reaction layer Al was formed at the Cu/Al interface after the SPS strong current treatment4Cu9、Al2The Cu phase crystal grains have obvious preferential growth characteristics, and are completely different from a non-preferential growth structure formed under the action of no current of the traditional Hot Pressing (HP). The EBSD shows that Al formed by the reaction under the SPS current4Cu9、Al2The preferential growth orientation of Cu in the (X-Z) plane in the current direction is [111 ]]And [001 ]](and their equivalent crystal orientations). The solid phase reaction tissue of the traditional hot pressing treatment has no preferred growth orientation.
Example 3
Pure W and pure Fe metals were processed into cylinders 30mm thick and 10mm in diameter. Grinding the round section with 600#, 800#, 1500# and 2000# sandpaper, cleaning with absolute ethyl alcohol, and drying. The W and Fe cylinders are mutually overlapped and arranged in a graphite die, prewelding treatment is carried out on the W and Fe cylinders by adopting a LABOX-350 discharge plasma sintering furnace of the company Sinter Land inc, a vacuum pump is opened to ensure that the vacuum degree in the furnace is not higher than 10Pa, the pressure between samples is set to be 30MPa, the heating rate is set to be 200 ℃/min, the solid phase reaction temperature is 900 ℃, and the heat preservation time is 1 min. Welding thick copper wires on two ends of the prewelded W/Fe solid-phase reaction sampleAnd is connected with a voltage-stabilizing direct-current power supply. And meanwhile, placing the tube-type atmosphere furnace in a tube-type atmosphere furnace, and introducing argon for protection. The temperature is set at 1100 ℃ and kept for 120min to start heating. When the temperature reaches 900 ℃, the direct current power supply is switched on to supply current, and the current is 800A/cm2. And turning off the power supply and cooling after the holding time. And cutting the sample into a required size after the solid-phase reaction to prepare the metallographic sample.
And adopting SEM to characterize the phase structure of the intermetallic compound at the diffusion interface. As a result, Fe produced by the interfacial reaction is shown in FIG. 37W6Has typical preferential growth characteristics.
Example 4
Pure copper and pure aluminum metal were processed into wafers 3mm thick and 20mm in diameter. Sanding with 600#, 800#, 1500# and 2000# sandpaper, cleaning with absolute ethyl alcohol, and drying for later use. The copper sheet and the aluminum sheet are mutually overlapped and loaded into a graphite die, the graphite die is subjected to heat treatment by adopting a discharge plasma sintering furnace (HP D25, FCT System GmbH, Rauenstein) of Germany FCT company, a vacuum pump is started to ensure that the vacuum degree in the furnace is not higher than 10Pa, the pressure between samples is set to be 20MPa, the heating rate is 80 ℃/min, the solid-phase reaction temperature is 1800 ℃, and the heat preservation time is 120 min. Meanwhile, the Cu/Al combination pattern is processed by a traditional hot-pressing sintering furnace at the same temperature. And cutting the sample into a required size after the solid-phase reaction to prepare the metallographic sample. EBSD is adopted to characterize the crystal orientation of the intermetallic compound phase at the diffusion interface. The results of the experiment were consistent with the previous results.
Example 5
Pure W and pure Fe metals were processed into cylinders 30mm thick and 10mm in diameter. Grinding the round section with 600#, 800#, 1500# and 2000# sandpaper, cleaning with absolute ethyl alcohol, and drying. The W and Fe cylinders are mutually overlapped and arranged in a graphite die, prewelding treatment is carried out on the W and Fe cylinders by adopting a LABOX-350 discharge plasma sintering furnace of the company Sinter Land inc, a vacuum pump is opened to ensure that the vacuum degree in the furnace is not higher than 10Pa, the pressure between samples is set to be 30MPa, the heating rate is set to be 50 ℃/min, the solid phase reaction temperature is 1000 ℃, and the heat preservation time is 1 min. And (3) welding thick copper wires at two ends of the prewelded W/Fe solid-phase reaction sample and connecting the two ends of the prewelded W/Fe solid-phase reaction sample with a voltage-stabilizing direct-current power supply. Simultaneously placing the mixture in a tubular atmosphere furnace, and introducing argon for protection. The temperature is set at 500 ℃, the temperature is kept for 120min, and the heating rate is 50 ℃/min. When the temperature reaches 500 ℃, a direct current power supply is switched on to supply current, and the current is 100A/cm2And the voltage is 1V, the power-on time is 120min, and the power supply is turned off and cooled after the preset time. And cutting the sample into a required size after the solid-phase reaction to prepare the metallographic sample. And (3) representing the phase structure of the intermetallic compound on the diffusion interface by adopting SEM, and keeping the experimental result consistent with the result.
Example 6
Pure W and pure Fe metals were processed into cylinders 30mm thick and 10mm in diameter. Grinding the round section with 600#, 800#, 1500# and 2000# sandpaper, cleaning with absolute ethyl alcohol, and drying. The W and Fe cylinders are mutually overlapped and arranged in a graphite die, prewelding treatment is carried out on the W and Fe cylinders by adopting a LABOX-350 discharge plasma sintering furnace of the company Sinter Land inc, a vacuum pump is opened to ensure that the vacuum degree in the furnace is not higher than 10Pa, the pressure between samples is set to be 30MPa, the heating rate is set to be 50 ℃/min, the solid phase reaction temperature is 1000 ℃, and the heat preservation time is 1 min. And (3) welding thick copper wires at two ends of the prewelded W/Fe solid-phase reaction sample and connecting the two ends of the prewelded W/Fe solid-phase reaction sample with a voltage-stabilizing direct-current power supply. And meanwhile, placing the tube-type atmosphere furnace in a tube-type atmosphere furnace, and introducing argon for protection. The temperature is set at 1800 ℃, the temperature is kept for 10min, and the heating rate is 100 ℃/min. When the temperature reaches 900 ℃, a direct current power supply is switched on to supply current, and the current is 5000A/cm2And the voltage is 12V, the electrifying time is 5min, and the power supply is turned off and cooled after the preset time. And cutting the sample into a required size after the solid-phase reaction to prepare the metallographic sample. And (3) representing the phase structure of the intermetallic compound on the diffusion interface by adopting SEM, and keeping the experimental result consistent with the result.
Example 7
Pure W and pure Fe metals were processed into cylinders 30mm thick and 10mm in diameter. Grinding the round section with 600#, 800#, 1500# and 2000# sandpaper, cleaning with absolute ethyl alcohol, and drying. The W and Fe cylinders are mutually overlapped and arranged in a graphite die, prewelding treatment is carried out on the W and Fe cylinders by adopting a LABOX-350 discharge plasma sintering furnace of the company Sinter Land inc, a vacuum pump is opened to ensure that the vacuum degree in the furnace is not higher than 10Pa, the pressure between samples is set to be 30MPa, the heating rate is set to be 50 ℃/min, the solid phase reaction temperature is 1000 ℃, and the heat preservation time is 1 min. Will be preweldedTwo ends of the W/Fe solid phase reaction sample are welded with thick copper wires and connected with a voltage-stabilizing direct current power supply. And meanwhile, placing the tube-type atmosphere furnace in a tube-type atmosphere furnace, and introducing argon for protection. The temperature is set at 1000 ℃, the temperature is kept for 100min, and the heating rate is 50 ℃/min. When the temperature reaches 800 ℃, a direct current power supply is switched on to supply current, and the current is 2000A/cm2And the voltage is 5V, the power-on time is 60min, and the power supply is turned off and cooled after the preset time. And cutting the sample into a required size after the solid-phase reaction to prepare the metallographic sample. And (3) representing the phase structure of the intermetallic compound on the diffusion interface by adopting SEM, and keeping the experimental result consistent with the result.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A method for controlling the growth orientation of a metal solid phase reaction structure by using an electric field is characterized in that direct current is applied to a metal solid phase interface in the reaction process through Spark Plasma Sintering (SPS) or direct current power supply equipment to induce the crystal of the metal interface to grow preferentially, and finally a material with the preferred growth orientation is obtained.
2. The method for controlling the growth orientation of the metal solid phase reaction tissue by the aid of the electric field according to claim 1, which is characterized by comprising the following steps:
step 1: selecting dissimilar metal to be reacted, and grinding and polishing the surface of the metal;
step 2: cleaning and drying the dissimilar metal block in the step 1, pressing contact surfaces of two dissimilar metal samples tightly to enable the surfaces to be connected of the two dissimilar metal samples to be contacted and reacted, and applying direct current to interfaces of the two dissimilar metal samples in a reaction process through Spark Plasma Sintering (SPS) or direct current power supply equipment;
and step 3: and stopping applying the current after the preset reaction time is reached, and cooling the reaction system until the temperature is cooled to the room temperature.
3. The method for controlling the growth orientation of the metal solid phase reaction tissue by the aid of the electric field according to claim 2, wherein in the step 2, the dissimilar metal samples in the step 1 are firstly cleaned and dried, then are mutually superposed and placed in a graphite mold to form a diffusion couple, an upper pressure head and a lower pressure head in the mold are used for pressing the samples to ensure that the surfaces to be connected of the two samples are contacted, the contact surfaces of the two samples are aligned with the temperature measuring holes of the graphite mold, and the temperature at the interface is measured by an infrared thermometer through the temperature measuring holes; then putting the graphite mold into an SPS furnace, opening a vacuum pump to ensure that the vacuum degree in the furnace is not higher than 10Pa, and setting the solid phase reaction parameters of two metal samples: the contact surface pressure of the two metal samples is 15MPa-40MPa, the temperature rising speed in the furnace is 50 ℃/min-200 ℃/min, the temperature rising is stopped after the temperature rises to the set heat preservation temperature, the heat preservation temperature is 500 ℃ to 1800 ℃, the heat preservation time is 10min-120min, and after the parameters are set, the current starts to be introduced.
4. The method for controlling the tissue growth orientation of metal solid phase reaction with the assistance of electric field according to claim 2, wherein in the step 2, after the dissimilar metal samples in the step 1 are firstly cleaned and dried, they are mutually stacked to form a diffusion couple, so as to ensure that the surfaces to be connected of the two samples are contacted; then pre-pressing the diffusion couples for 0.5min-2min to connect the diffusion couples; and then putting the diffusion couple into heating equipment filled with protective gas, heating to a certain temperature, preserving heat, and introducing direct current at two ends of the diffusion couple.
5. The method for controlling the growth orientation of metal solid phase reaction tissue using electric field assistance as claimed in claim 4, wherein the diffusion couple is pre-pressed by using a hot pressing device or an SPS device.
6. The method for controlling the growth orientation of the metal solid phase reaction structure by the aid of the electric field as claimed in claim 4, wherein the heating device is a tube furnace, and the shielding gas is argon.
7. The method for controlling the growth orientation of the metal solid phase reaction tissue by the aid of the electric field according to claim 4, wherein the heating rate of the heating equipment is 50-200 ℃/min, the heat preservation temperature is 500-1800 ℃, and the heat preservation time is 10-120 min.
8. The method for controlling the tissue growth orientation of metal solid phase reaction with the assistance of electric field as claimed in claim 4, wherein the current density of the direct current is 100A/cm2-5000A/cm2The voltage is 1V-12V, and the electrifying time is 5min-120 min.
9. The method for controlling the growth orientation of the metal solid phase reaction structure by the aid of the electric field according to any one of claims 1 to 8, wherein the dissimilar metal sample is W/Co, Cu/Al, Ti/Ni, Ti/Al or Fe/Al.
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| CN106676292A (en) * | 2016-11-14 | 2017-05-17 | 西安理工大学 | Preparation method of Al-CuZn bimetallic conducting material |
| CN106825885A (en) * | 2017-02-24 | 2017-06-13 | 合肥工业大学 | A kind of connection method of TZM alloys and WRe alloys under electric field-assisted |
| CN107096987A (en) * | 2017-03-22 | 2017-08-29 | 华南理工大学 | A kind of quick diffusion welding method of metal bar based on pulsed current annealing |
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| CN106676292A (en) * | 2016-11-14 | 2017-05-17 | 西安理工大学 | Preparation method of Al-CuZn bimetallic conducting material |
| CN106825885A (en) * | 2017-02-24 | 2017-06-13 | 合肥工业大学 | A kind of connection method of TZM alloys and WRe alloys under electric field-assisted |
| CN107096987A (en) * | 2017-03-22 | 2017-08-29 | 华南理工大学 | A kind of quick diffusion welding method of metal bar based on pulsed current annealing |
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