CN117327953A - Novel MAB metal ceramic material and preparation method thereof - Google Patents
Novel MAB metal ceramic material and preparation method thereof Download PDFInfo
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- CN117327953A CN117327953A CN202311294519.0A CN202311294519A CN117327953A CN 117327953 A CN117327953 A CN 117327953A CN 202311294519 A CN202311294519 A CN 202311294519A CN 117327953 A CN117327953 A CN 117327953A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 42
- 239000002184 metal Substances 0.000 title claims abstract description 42
- 229910010293 ceramic material Inorganic materials 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 74
- 238000005245 sintering Methods 0.000 claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000011812 mixed powder Substances 0.000 claims abstract description 15
- 230000005684 electric field Effects 0.000 claims abstract description 12
- 238000007731 hot pressing Methods 0.000 claims abstract description 10
- 238000004321 preservation Methods 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 3
- 239000010439 graphite Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 38
- 239000011195 cermet Substances 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 238000003786 synthesis reaction Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims 1
- 239000000919 ceramic Substances 0.000 description 8
- 239000013078 crystal Substances 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 238000000227 grinding Methods 0.000 description 6
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910018173 Al—Al Inorganic materials 0.000 description 3
- 229910017262 Mo—B Inorganic materials 0.000 description 3
- 238000005411 Van der Waals force Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 238000011031 large-scale manufacturing process Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000001272 pressureless sintering Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002490 spark plasma sintering Methods 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000008261 resistance mechanism Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
-
- 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
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0073—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only borides
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention provides a novel MAB metal ceramic material and a preparation method thereof, wherein the method comprises the following steps: (1) Mo is added with 2 B 5 Uniformly preparing mixed powder of the powder, the Al powder and the Mo powder according to the mol ratio of 1:5.5-7.5:3; (2) And (3) placing the mixed powder into a graphite mold, performing electric field-assisted direct current rapid hot-pressing sintering on the powder in a vacuum environment, and maintaining the pressure and the heat preservation. The novel MAB metal ceramic material prepared by the method has high phase conversion rate and excellent tissue compactness.
Description
Technical Field
The invention belongs to the technical field of novel MAB metal ceramic materials, and particularly relates to a novel MAB metal ceramic material and a preparation method thereof.
Background
The MAB phase is a processable ternary lamellar transition metal boride material, and successfully improves the fracture toughness, oxidation resistance and the like of the binary boride, wherein M represents a transition metal element, A represents an Al or Zn element and B represents elemental boron. A typical representative material for the MAB phase is the MoAlB phase, which, unlike ceramic materials, is processable and also enhances the mechanical properties of the material. Therefore, many researchers in recent years have developed a great deal of research into machinable MoAlB cermet materials, and in particular, the preparation process is continually optimized. The material has important significance for the development of materials in modern engineering material science, and the material has wide application prospect in the fields of high-temperature structural materials, antioxidation coatings, transition layers for metal and ceramic connection and the like.
In recent years, most of researches focus on theoretical calculation of MoAlB crystal structures and the like, and systematic researches on preparation processes, mechanical property strengthening mechanisms, oxidation resistance mechanisms and the like of the MoAlB crystal structures are still lacking. The main preparation method of the metal ceramic material comprises the following steps: pressureless Sintering (PS), self-propagating high temperature synthesis (SHS), hot press sintering (HP), spark Plasma Sintering (SPS), and the like. The spark plasma sintering method in the reaction sintering process cannot realize large-scale production, and has the advantages of high energy consumption and high cost. The self-propagating high-temperature synthesis method has low cost, but the existence of impurity phases is unavoidable in the preparation process, so that the prepared material has low purity and has adverse effects on the performances such as conductivity, oxidation resistance, corrosion resistance and the like of the material. The pressureless sintering method also has the preparation defects which cannot be solved, the prepared sample has larger grain size, and the mechanical property cannot reach the ideal value. The material prepared by the hot-pressed sintering method has high strength and density, but the preparation cost is very high. The electric field assisted direct current rapid hot pressing sintering method adopts a direct current power supply system, and the direct current and axial pressure are used for rapidly performing compact sintering. During sintering, the direct current continuously generates joule heat in the sample, thereby shortening the processing time and realizing rapid sintering. Solves the problems that the metal ceramic cannot realize large-scale production in the preparation process, has larger energy consumption and high cost, has more impurity phases, has low conversion rate and the like.
Disclosure of Invention
The invention provides a novel MAB metal ceramic material and a preparation method thereof, wherein the novel MAB metal ceramic material is prepared from Mo 2 B 5 The powder, al powder and Mo powder are prepared by adopting an electric field-assisted direct current rapid hot-pressing sintering method according to the mol ratio of 1:5.5-7.5:3 as raw materials.
Preferably, the conversion rate of the MoAlB block material generated by sintering is high.
The invention also provides a preparation method of the novel MAB metal ceramic material, which comprises the following steps:
mo is added with 2 B 5 Uniformly mixing the powder, the Al powder and the Mo powder according to the mol ratio of 1:5.5-7.5:3 to prepare mixed powder;
and (3) placing the mixed powder into a graphite mold, performing electric field-assisted direct current rapid hot-pressing sintering on the powder in a vacuum environment, and maintaining the pressure and the heat preservation.
Preferably, the drying treatment temperature of the mixed powder is 90 ℃ and the time is 2 hours.
Preferably, mo 2 B 5 The granularity of the powder is 400 meshes, the granularity of Al powder is 325 meshes, and the granularity of Mo powder is 325 meshes.
Preferably, the sintering application pressure is maintained at 30-50MPa.
Preferably, the sintering temperature is 1050-1450 ℃.
Preferably, the sintering reaction temperature rise rate is 150 ℃/min.
Preferably, the incubation time is 10-15min.
Preferably, the electric field assisted direct current rapid hot-pressing sintering technology which is relatively low in cost, easy to industrialize and environment-friendly is adopted, the process parameters are optimized from the in-situ reaction synthesis mechanism of the material, the product composition and the reaction proceeding trend are regulated, and the conversion rate of the in-situ reaction synthesized material is improved.
In the novel MAB metal ceramic material and the preparation method thereof provided by the invention, a direct current electric field auxiliary sintering technology which is relatively low in cost, easy to industrialize and environment-friendly is adopted, and Mo is adopted 2 B 5 The sintering reaction of the Al-Mo system generates MoAlB phase, moAlB crystal grains are in a strip shape and are arranged in a layered manner, the synthesized MoAlB material has high conversion rate, compact structure and excellent performance, and the problems that the metal ceramic cannot realize large-scale production, high energy consumption, high cost and the like in the preparation process are solved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
FIG. 1 is a view of Mo according to the invention 2 B 5 XRD pattern of powder, al powder and Mo powder mixed powder;
FIG. 2 is an XRD pattern of a novel MAB cermet material according to the present invention;
fig. 3 is an SEM image of the novel MAB cermet material of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent, and the embodiments described in detail, but not necessarily all, in connection with the accompanying drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The first embodiment of the invention provides a preparation method of a novel MAB metal ceramic material, which comprises the following steps:
mo is adopted 2 B 5 Powder, al powder and Mo powder asPreparing raw materials, wherein Mo 2 B 5 The purities of the powder, al powder and Mo powder were 99.9%, 99.5% and 99.7%, and the particle sizes were 400 mesh, 325 mesh and 325 mesh, respectively. Mo is added with 2 B 5 The powder, al powder and Mo powder are mixed according to the mol ratio of 1:5.5:3. Mixing the mixed powder on a planetary ball mill for 8 hours to obtain uniformly mixed powder, wherein the grinding balls of the ball mill are zirconia balls, the mass ratio of the balls is 5:1, and the volume ratio of the absolute ethyl alcohol to the balls is 3:2.
Pouring the ball-milled powder into a 0.5L beaker, and cleaning the grinding balls and the ball-milling tank with absolute ethyl alcohol so as to avoid powder loss. The beaker filled with the absolute ethyl alcohol and the powder is placed into a blast drying box for blast drying, the temperature is set to 90 ℃, and the powder is taken out after being completely dried.
And sintering the MoAlB sample by adopting an electric field assisted direct current rapid hot-pressing sintering device (FHP-828), wherein the heating rate is 150 ℃/min, the sintering temperature is 1150 ℃, and the heat preservation time is 10min.
In the novel MAB metal ceramic material prepared by the method, the conversion rate of MoAlB is high, the energy consumption is low, and the novel MAB metal ceramic material is green and environment-friendly, and the main phase of the novel MAB metal ceramic material is MoAlB phase.
In the preparation method of the novel MAB cermet material provided by the embodiment of the invention, mo is adopted 2 B 5 The sintering reaction of the Al-Mo system generates a novel MoAlB metal ceramic material, wherein MoAlB grains are in a strip shape and are distributed in a layered manner; the Al element has the function of promoting sintering, and the prepared synthesized MoAlB metal ceramic material has compact structure.
It should be noted that, moAlB is one of ternary boride MAB phases, and has a 111-type structure, strong covalent bond linkage is formed between Mo-B and B-B, and weak metal bond and weak bond similar to van der waals force are combined between Al-Al and Al-MoB, and this special bond structure is favorable for interlayer sliding of crystal so as to improve fracture toughness of cermet, and the unique lamellar structure makes the material have lower friction coefficient and good workability, and can be processed into various shaped products without plastic deformation in the processing process. The purity, high temperature and other properties of the novel metal ceramic MoAlB material prepared by the method are obviously improved.
The second embodiment of the invention provides a preparation method of a novel MAB metal ceramic material, which comprises the following steps:
mo is adopted 2 B 5 Powder, al powder and Mo powder are used as preparation raw materials, wherein Mo 2 B 5 The purities of the powder, al powder and Mo powder were 99.9%, 99.5% and 99.7%, and the particle sizes were 400 mesh, 325 mesh and 325 mesh, respectively. Mo is added with 2 B 5 The powder, al powder and Mo powder are mixed according to the mol ratio of 1:6.5:3. Mixing the mixed powder on a planetary ball mill for 8 hours to obtain uniformly mixed powder, wherein the grinding balls of the ball mill are zirconia balls, the mass ratio of the balls is 5:1, and the volume ratio of the absolute ethyl alcohol to the balls is 3:2.
Pouring the ball-milled powder into a 0.5L beaker, and cleaning the grinding balls and the ball-milling tank with absolute ethyl alcohol so as to avoid powder loss. The beaker filled with the absolute ethyl alcohol and the powder is placed into a blast drying box for blast drying, the temperature is set to 90 ℃, and the powder is taken out after being completely dried.
And sintering the MoAlB sample by adopting an electric field assisted direct current rapid hot-pressing sintering device (FHP-828), wherein the heating rate is 150 ℃/min, the sintering temperature is 1200 ℃, and the heat preservation time is 10min.
In the novel MAB metal ceramic material prepared by the method, the conversion rate of MoAlB is high, the energy consumption is low, the novel MAB metal ceramic material is green and environment-friendly, and the main peak of the novel MAB metal ceramic material is MoAlB phase.
In the preparation method of the novel MAB cermet material provided by the embodiment of the invention, mo is adopted 2 B 5 The sintering reaction of the Al-Mo system generates a novel MoAlB metal ceramic material, wherein MoAlB grains are in a strip shape and are distributed in a layered manner; the Al element has the function of promoting sintering, and the prepared and synthesized processable metal ceramic MoAlB material has compact structure.
It should be noted that, moAlB is one of ternary boride MAB phases, and has a 111-type structure, strong covalent bond linkage is formed between Mo-B and B-B, and weak metal bond and weak bond similar to van der waals force are combined between Al-Al and Al-MoB, and this special bond structure is favorable for interlayer sliding of crystal so as to improve fracture toughness of cermet, and the unique lamellar structure makes the material have lower friction coefficient and good workability, and can be processed into various shaped products without plastic deformation in the processing process. The conversion rate, high temperature and other performances of the novel MAB metal ceramic MoAlB material prepared by the method are obviously improved.
The third embodiment of the invention provides a preparation method of a novel MAB metal ceramic material, which comprises the following steps:
mo is adopted 2 B 5 Powder, al powder and Mo powder are used as preparation raw materials, wherein Mo 2 B 5 The purities of the powder, al powder and Mo powder were 99.9%, 99.5% and 99.7%, and the particle sizes were 400 mesh, 325 mesh and 325 mesh, respectively. Mo is added with 2 B 5 Mixing the powder, al powder and Mo powder according to the mol ratio of 1:6.5:3, wherein the Mo 2 B 5 The XRD patterns of the powder, al powder and Mo powder mixture powder are shown in FIG. 1. Mixing the mixed powder on a planetary ball mill for 8 hours to obtain uniformly mixed powder, wherein the grinding balls of the ball mill are zirconia balls, the mass ratio of the balls is 5:1, and the volume ratio of the absolute ethyl alcohol to the balls is 3:2.
Pouring the ball-milled powder into a 0.5L beaker, and cleaning the grinding balls and the ball-milling tank with absolute ethyl alcohol so as to avoid powder loss. The beaker filled with the absolute ethyl alcohol and the powder is placed into a blast drying box for blast drying, the temperature is set to 90 ℃, and the powder is taken out after being completely dried.
And sintering the MoAlB sample by adopting an electric field assisted direct current rapid hot-pressing sintering device (FHP-828), wherein the heating rate is 150 ℃/min, the sintering temperature is 1250 ℃, and the heat preservation time is 10min.
In the novel MAB metal ceramic material prepared by the method, the conversion rate of MoAlB is high, the energy consumption is low, the novel MAB metal ceramic material is green and environment-friendly, the XRD pattern of the novel MAB metal ceramic material is shown in figure 2, and the main peak of the novel MAB metal ceramic material is MoAlB phase.
The embodiment of the invention provides a novel MAB metal ceramic materialIn the preparation method of the material, mo is adopted 2 B 5 The sintering reaction of the Al-Mo system generates a novel MoAlB metal ceramic material, wherein MoAlB grains are in a strip shape and are distributed in a layered manner; the Al element has the function of promoting sintering, and the prepared synthesized MoAlB metal ceramic material has compact structure. SEM pictures of the novel MAB cermet material are shown in figure 3.
It should be noted that, moAlB is one of ternary boride MAB phases, and has a 111-type structure, strong covalent bond linkage is formed between Mo-B and B-B, and weak metal bond and weak bond similar to van der waals force are combined between Al-Al and Al-MoB, and this special bond structure is favorable for interlayer sliding of crystal so as to improve fracture toughness of cermet, and the unique lamellar structure makes the material have lower friction coefficient and good workability, and can be processed into various shaped products without plastic deformation in the processing process. The purity, high temperature and other properties of the novel metal ceramic MoAlB material prepared by the method are obviously improved.
The invention has been described above by way of example with reference to the accompanying drawings, it is clear that the implementation of the invention is not limited to the above-described manner, but it is within the scope of the invention to apply the inventive concept and technical solution to other situations as long as various improvements made by the inventive concept and technical solution are adopted or without any improvement.
Claims (6)
1. A novel MAB metal ceramic material is characterized in that the material is prepared from Mo 2 B 5 The powder, al powder and Mo powder are sintered according to the mol ratio of 1:5.5-7.5:3.
2. The preparation method of the novel MAB metal ceramic material is characterized by comprising the following steps of:
(1) Mo is added with 2 B 5 The powder, al powder and Mo powder are put into a planetary ball mill according to the mol ratio of 1:5.5-7.5:3 for wet ball milling to prepare uniform mixed powder;
(2) And (3) placing the mixed powder into a graphite mold, and carrying out electric field assisted direct current rapid hot-pressing sintering on the powder and maintaining the pressure and the heat preservation under the vacuum environment and the applied pressure of 30-50MPa.
3. The novel MAB cermet material of claim 1 in which Mo 2 B 5 The particle size of the powder was 400 mesh, the particle size of the Al powder was 325 mesh, and the particle size of the Mo powder was 325 mesh.
4. The method for preparing a novel MAB cermet material according to claim 2, wherein the uniform mixing in the step (1) is as follows: mo is added with 2 B 5 The powder, al powder and Mo powder are added into a planetary ball mill according to the mol ratio of 1: (5.5-7.5) to 3 for wet mixing by adding absolute ethyl alcohol, the mixing time is 8 hours, the mass ratio of the ball materials is 5:1, the balls are zirconia balls, and the volume ratio of the absolute ethyl alcohol to the ball materials is 3:2. And (3) drying the mixed powder in an oven at 90 ℃ for 2 hours until the powder is dried.
5. The method for preparing a novel MAB cermet material according to claim 2, wherein in the step (2), the electric field assisted direct current rapid hot pressed sintering and maintaining the pressurizing and heat preserving process: the pressure is kept at 30-50MPa, the temperature rising speed of the sintering reaction is 150 ℃/min, the sintering temperature is 1050-1450 ℃, and the heat preservation time is 10-15min.
6. The method for preparing a novel MAB cermet material according to claim 2, wherein in step (2), the electric field assisted direct current rapid hot pressing sintering technology which is relatively low in cost, easy to industrialize and environment friendly is adopted, and starting from the material in-situ reaction synthesis mechanism, the process parameters are optimized, the product composition and the trend of reaction progress are regulated, and the conversion rate of the in-situ reaction synthesized material is improved.
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| CN202310813751 | 2023-07-04 | ||
| CN2023108137514 | 2023-07-04 |
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