CN115338414A - Light Al-ZrW with adjustable thermal expansion coefficient 2 O 8 Method for producing a material - Google Patents
Light Al-ZrW with adjustable thermal expansion coefficient 2 O 8 Method for producing a material Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title description 3
- 239000000843 powder Substances 0.000 claims abstract description 37
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000002844 melting Methods 0.000 claims abstract description 23
- 230000008018 melting Effects 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000007731 hot pressing Methods 0.000 claims abstract description 16
- 229910052786 argon Inorganic materials 0.000 claims abstract description 13
- 238000010891 electric arc Methods 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 25
- 239000000956 alloy Substances 0.000 claims description 17
- 238000005245 sintering Methods 0.000 claims description 17
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 239000000155 melt Substances 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 2
- 238000000889 atomisation Methods 0.000 abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 8
- 238000002679 ablation Methods 0.000 abstract description 5
- 238000011065 in-situ storage Methods 0.000 abstract description 3
- 239000007791 liquid phase Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 238000005275 alloying Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 239000012798 spherical particle Substances 0.000 description 5
- 238000000227 grinding Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000012300 argon atmosphere Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000004100 electronic packaging Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
- B22F1/0655—Hollow particles
-
- 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
- C22C21/00—Alloys based on aluminium
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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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
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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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0848—Melting process before atomisation
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- Chemical & Material Sciences (AREA)
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Abstract
Al-ZrW with adjustable thermal expansion coefficient 2 O 8 Preparation method of ultra-light material, adopting electric arc melting synthesis and ZrW preparation 2 O 8 ZrW atomized by melt, aluminum powder and high-pressure argon 2 O 8 Method for preparing Al-hollow ZrW by melt 2 O 8 An ultra-light near-zero expansion material; the specific method comprises the following steps: respectively mix ZrO 2 And WO 3 Powder is sintered into a block compact by hot pressing, and the compact is melted and synthesized into ZrW by arc ablation 2 O 8 Melting the materials; by mixing argon and Al powderAtomizing ZrW 2 O 8 Melting; zrW formed after atomization 2 O 8 The hollow micro powder and the aluminum powder are deposited together to form Al-hollow ZrW 2 O 8 The block body is used for preparing the ultra-light Al-ZrW with near-zero thermal expansion or negative thermal expansion coefficient 2 O 8 The material ensures compactness, realizes the liquid-phase in-situ preparation of the material with the zero thermal expansion coefficient and effectively reduces the density of the material.
Description
Technical Field
The invention relates to a near-zero thermal expansion coefficient adjustable material in the field of aerospace and precision instruments and equipment, in particular to a light Al-ZrW with an adjustable thermal expansion coefficient 2 O 8 A method for preparing the material.
Background
The material with the near-zero thermal expansion coefficient is widely applied to the occasions of precision instruments and the like of aerospace, military industry and the like, and is sensitive to the size requirement of parts and the service temperature, so that the material can normally operate at extreme temperature, the size change of the parts is ensured to be within a limited range, the thermal expansion coefficient is near zero, and the value is stable. Therefore, the near-zero thermal expansion material plays an important role in the fields of electronic packaging, aerospace, integrated circuits, optical communication, military industry and the like.
In recent years, research on near-zero thermal expansion coefficient materials is increasing, and ZrW is adopted 2 O 8 Alloys that are the second phase exhibit excellent thermal expansion properties due to ZrW over a wide temperature range (0.3K-1050K) 2 O 8 The material has isotropic negative thermal expansion performance, and the material with the near-zero thermal expansion coefficient in a wide temperature range can be obtained by compounding the material with other metals. Al-ZrW prepared by traditional powder metallurgy method 2 O 8 The alloy is difficult to realize hundred percent compactness, the performance of the zero thermal expansion material can be reduced by the existing pores, and ZrW is difficult to regulate and control 2 O 8 The size of the pores, so that the thermal expansion coefficient of the material cannot be accurately regulated, if ZrW can be changed 2 O 8 The structure of the phase is controlled by a technological means, so that ZrW is formed 2 O 8 Not only provides reverse deformation space for the aluminum phase in the micro-scale, but also can freely regulate and control the thermal expansion coefficient in the macro-scale.
The traditional alloy material has high density, and the prepared near-zero/negative thermal expansion coefficient material has high specific gravity, so that the application of the material in the fields of aerospace and electronic packaging is limited. Therefore, the structure of the material needs to be changed, the density is effectively reduced, the preparation of the light material is realized, and the application requirements in different fields are met.
Disclosure of Invention
In order to realize the liquid-phase in-situ preparation of the material with the zero thermal expansion coefficient and effectively reduce the density of the material to meet the requirements of different fields while ensuring the compactness, the invention aims to provide the light Al-ZrW with the adjustable thermal expansion coefficient 2 O 8 Method for producing a material by arc melting andpreparation of Al-hollow ZrW by atomization method 2 O 8 The powder alloy is prepared by controlling the size of powder particles and the wall thickness of a hollow sphere to regulate and control the thermal expansion coefficient and the density and utilizing a liquid phase sintering method of electric arc melting to prepare the Al-hollow ZrW with the second phase orderly arranged 2 O 8 And (3) alloying.
In order to achieve the purpose, the invention adopts the technical scheme that:
light Al-ZrW with adjustable thermal expansion coefficient 2 O 8 The preparation method of the material comprises the following steps:
(1) ZrO is prepared by 2 And WO 3 Powder is prepared by mixing the following components in a mass ratio of 1: (2-4) respectively carrying out hot-pressing sintering according to the set pressure and temperature curves to respectively obtain ZrO 2 And WO 3 Pressing into a blank;
(2) ZrO is prepared by 2 And WO 3 The pressed compact is put into an electric arc sintering device, the melting parameter is 2715-3500 ℃, the control voltage range is 20-30V, and the current range is 120-140A, and the ZrW is obtained by electric arc melting 2 O 8 Melting;
(3) Preparing Al-ZrW by adopting arc melting and atomizing method 2 O 8 Alloy: mixing argon with 200-300 mesh Al powder as atomizing gas for later use, adjusting the gas pressure to 3.5-5MPa 2 O 8 When the melt flows out through a conductive nozzle of the electric arc sintering device, atomizing gas is sprayed to break metal droplets to form Al-hollow ZrW 2 O 8 Collecting the cooled powder by using an ingot mold; the regulation and control of the aperture and the wall thickness are realized by adjusting the pressure of the atomizing gas and the smelting parameters.
The pressure range is as follows: pressure intensity range of 20-30 MPa.
The temperature curve is as follows: heating to 700-850 ℃ at the speed of 8-12 ℃/min, preserving the heat for 1-1.5h, and then cooling at the speed of 8-12 ℃/min.
The argon gas introduction speed is 150-300m/s.
The invention has the advantages that:
(1) Al-ZrW obtained by preparation 2 O 8 Middle ZrW 2 O 8 Phase of hollow spherical particles, size distribution range10-100 μm and 10-50 μm of wall thickness, so that the alloy can really realize negative thermal expansion when heated and has adjustable thermal expansion coefficient, and the density range is 2.652-3.728g/cm 3 The thermal expansion coefficient range is (-0.5-0.5) x 10 -6 K -1 。
(2) The invention prepares Al-ZrW in situ liquid state 2 O 8 The alloy improves the speed difference between the atomizing gas and the liquid metal, increases the speed gradient of the primary atomizing process, and ensures that ZrW 2 O 8 The shape of the powder is hollow sphere, and ZrW is changed by adjusting the flow of atomizing gas 2 O 8 The pore diameter and the wall thickness of the powder can freely regulate and control the thermal expansion coefficient and the density of the material.
Drawings
FIG. 1 shows that Al-ZrW is prepared by adopting an electric arc melting and atomizing method 2 O 8 Schematic representation of the alloy.
Detailed Description
The present invention will be described in detail with reference to examples.
Example 1
The steps of this embodiment are:
(1) Preparing WO by adopting hot-pressing sintering method 3 And ZrO 2 And (5) compacting. According to the following steps: 1 by mass ratio of ZrO 2 And WO 3 Respectively placing the powder into respective dies, cold-pressing and molding by using a hydraulic press (the pressure is 50 MPa), and then carrying out hot-pressing sintering in a hot-pressing furnace (the pressure is 20MPa, the temperature curve is that the temperature is raised to 700 ℃ at the speed of 8 ℃/min, the temperature is kept for 1.5h, and then the temperature is reduced at the speed of 8 ℃/min) to obtain ZrO 2 And WO 3 And (5) compacting.
(2) ZrW prepared by adopting arc melting method 2 O 8 And (4) melting the melt. Is reacted with ZrO 2 And WO 3 Grinding the pressed compact into cylindrical electrode wires with diameter of 2mm and height of 100mm, respectively serving as positive and negative electrodes, assembling on an arc spray atomization device, performing arc ablation under conditions of direct current voltage of 20-30V and current of 120-140A, and processing with WO 3 ：ZrO 2 =2:1 mass ratio of the molten droplets.
(3) Preparing Al-hollow ZrW by adopting atomization method 2 O 8 And (3) alloying. As shown in figure 1, 300 mesh Al powder is mixed into argon atmosphere with 3.5-5MPa pressure gradient as atomizing gas, and the argon gas is introduced at a speed of 150m/s; waiting for ZrW 2 O 8 When the melt flows out from the conductive nozzle, atomizing gas is sprayed out through the Laval nozzle to break the mother liquid drop, zrW 2 O 8 The hollow micro powder and the aluminum powder are jointly deposited to form Al-hollow ZrW 2 O 8 Collecting the cooled powder with ingot mold to obtain Al-hollow ZrW 2 O 8 Alloy of which ZrW 2 O 8 Hollow spherical particle size of 80 μm, wall thickness of 30-40 μm, al-hollow ZrW 2 O 8 The density range of the alloy is 2.652-3.128g/cm 3 The compactness reaches 99 percent, and the thermal expansion coefficient range is (-0.5) multiplied by 10 -6 K -1 。
Example two
The steps of this embodiment are:
(1) Preparing WO by adopting hot-pressing sintering method 3 And ZrO 2 And (5) compacting. According to the following steps: 3.8 weight ratio of ZrO 2 And WO 3 Respectively placing the powder into respective dies, cold-pressing and molding by using a hydraulic press (the pressure is 80 MPa), and then carrying out hot-pressing sintering in a hot-pressing furnace (the pressure is 25MPa, the temperature curve is that the temperature is increased to 850 ℃ at the speed of 10 ℃/min, the temperature is kept for 1h, and then the temperature is reduced at the speed of 10 ℃/min) to obtain ZrO 2 And WO 3 And (5) compacting.
(2) ZrW prepared by electric arc melting method 2 O 8 And (3) melting the melt. ZrO 2 is mixed with 2 And WO 3 Grinding the pressed compact into cylindrical electrode wire with diameter of 2mm and height of 100mm, placing into a contact nozzle, arc melting at a given position, arc ablating under the conditions of direct current voltage of 20-30V and current of 120-140A, and processing with WO 3 ：ZrO 2 =3.8:1 by mass ratio, the wire was melted into a liquid, and the molten droplets were mixed.
(3) Preparing Al-hollow ZrW by adopting multi-stage atomization method 2 O 8 And (3) alloying. As shown in figure 1, 200-mesh Al powder is mixed into argon atmosphere with pressure gradient of 2-3.5MPa to be used as atomizing gas, and the argon gas is introduced at the speed of 200m/s; to be ZrW 2 O 8 Atomizing gas when the melt flows out of the contact nozzleThe mother liquid drop is broken into 100-150 μm tiny particles by spraying through a Laval nozzle. The micro particles enter a through hole in a secondary atomizing device, are secondarily atomized and impact-crushed by atomizing gas of 5MPa high-speed argon mixed 200-mesh Al powder, and ZrW 2 O 8 The hollow micro powder and the aluminum powder are jointly deposited to obtain Al-hollow ZrW 2 O 8 Powder, collecting cooled powder with ingot mold. Obtaining Al-hollow ZrW 2 O 8 Alloy of which ZrW 2 O 8 Hollow spherical particle size 20 μm, wall thickness 10 μm, al-hollow ZrW 2 O 8 The density range of the alloy is 3.052-3.728g/cm 3 The compactness reaches 100 percent, and the thermal expansion coefficient range is (-0.1) multiplied by 10 -7 K -1 。
EXAMPLE III
The steps of this embodiment are:
(1) Preparing WO by adopting hot-pressing sintering method 3 And ZrO 2 And (5) compacting. According to the following steps of 3:1 by mass ratio of ZrO 2 And WO 3 Respectively placing the powder into respective dies, cold-pressing and molding by using a hydraulic press (the pressure is 60 MPa), and then carrying out hot-pressing sintering in a hot-pressing furnace (the pressure is 25MPa, the temperature curve is that the temperature is raised to 700 ℃ at the speed of 12 ℃/min, the temperature is kept for 1.2h, and then the temperature is lowered at the speed of 12 ℃/min) to obtain ZrO 2 And WO 3 And (5) compacting.
(2) ZrW prepared by arc plasma method 2 O 8 And (3) powder. Is reacted with ZrO 2 And WO 3 Grinding the pressed blank into a cylindrical electrode wire with the diameter of 2mm and the height of 100mm, assembling the cylindrical electrode wire on an electric arc atomization device, respectively heating to more than 2700 ℃ and 1473 ℃ for melting and preserving heat. Arc ablation is carried out under the conditions of 20-30V DC voltage and 120-140A current, and WO is added 3 ：ZrO 2 =3:1 to obtain ZrW 2 O 8 The droplets are melted.
(3) Preparation of Al-hollow ZrW by atomization method 2 O 8 And (3) alloying. Delivering the molten droplets into an arc plasma generator, and impacting by atomized gas of Al powder of 200 meshes mixed by argon with 3.5-5MPa high-pressure gradient, wherein the introducing speed of the argon is 300m/s; zrW 2 O 8 The hollow micro powder and the aluminum powder are jointly deposited to obtainAl-hollow ZrW 2 O 8 Cooling the powder, and collecting the powder by a cloth bag powder collector to obtain the Al-hollow ZrW 2 O 8 And (3) alloying. ZrW 2 O 8 Hollow spherical particle size of 30 μm, wall thickness of 20-30 μm, al-hollow ZrW 2 O 8 The density range of the alloy is 2.652-3.128g/cm 3 The compactness reaches 100 percent, and the thermal expansion coefficient range is (-0.2) multiplied by 10 -6 K -1 。
Example four
The steps of this embodiment are:
(1) Preparing WO by adopting hot-pressing sintering method 3 And ZrO 2 And (5) compacting. According to the following steps of 4:1 mass ratio of ZrO 2 And WO 3 Respectively placing the powder into respective dies, cold-pressing and molding by using a hydraulic press (the pressure is 50 MPa), and then carrying out hot-pressing sintering in a hot-pressing furnace (the pressure is 30MPa, the temperature curve is that the temperature is raised to 850 ℃ at the speed of 10 ℃/min, the temperature is kept for 1.5h, and then the temperature is lowered at the speed of 10 ℃/min) to obtain ZrO 2 And WO 3 And (5) compacting.
(2) ZrW prepared by adopting arc melting method 2 O 8 And (4) melting the melt. ZrO 2 is mixed with 2 And WO 3 Grinding the pressed compact into cylindrical electrode wires with diameter of 2mm and height of 100mm, respectively serving as positive and negative electrodes, assembling on an arc spray atomization device, performing arc ablation under DC voltage of 20-30V and current of 120-140A, and processing with WO 3 ：ZrO 2 =4:1, the molten droplets are mixed.
(3) Preparation of Al-hollow ZrW by atomization and SPS sintering 2 O 8 And (3) alloying. Mixing 300-mesh Al powder into argon atmosphere with a pressure gradient of 3.5-5MPa as atomizing gas, wherein the argon gas introduction rate is 250m/s; to be ZrW 2 O 8 When the melt flows out from the contact nozzle, the atomized gas is sprayed out through the Laval nozzle to break the mother liquid drop, zrW 2 O 8 The hollow micro powder and the aluminum powder are jointly deposited to form Al-hollow ZrW 2 O 8 And (3) collecting cooled powder by using an ingot mold, putting the powder into the mold, assembling an upper pressure head and a lower pressure head, and sintering in an SPS furnace (the set temperature is 1100 ℃, and the pressure is 20 MPa). Obtaining Al-hollow ZrW 2 O 8 An alloy of a metal and a metal,wherein ZrW 2 O 8 Hollow spherical particle size of 80 μm, wall thickness of 30-40 μm, al-hollow ZrW 2 O 8 The density range of the alloy is 2.652-3.128g/cm 3 The compactness reaches 99.99 percent, and the thermal expansion coefficient range is (-0.3) multiplied by 10 -7 K -1 。
The invention uses ZrO 2 And WO 3 Powder is sintered into a block compact by hot pressing, and the compact is melted by arc ablation to obtain ZrW 2 O 8 And melting, namely mixing argon and Al powder to obtain atomized gas. The ZrW is impacted by high-speed atomizing gas when the melt flows out of the contact nozzle 2 O 8 The hollow micro powder and the aluminum powder are jointly deposited to obtain the high-density low-density Al-hollow ZrW with the tissues in ordered arrangement 2 O 8 A lightweight material. ZrW in alloy 2 O 8 ZrW with controllable aperture and wall thickness and different particle diameters when temperature is changed 2 O 8 The shrinkage degrees are different, and the negative expansion performance of different degrees is further shown, so that the effective regulation and control of the thermal expansion coefficient are realized.
Claims (4)
1. Light Al-ZrW with adjustable thermal expansion coefficient 2 O 8 The preparation method of the material is characterized by comprising the following steps:
(1) ZrO is prepared by 2 And WO 3 Powder is prepared by mixing the following components in a mass ratio of 1: (2-4), respectively carrying out hot-pressing sintering, setting certain pressure and temperature curves to respectively obtain ZrO 2 And WO 3 Pressing into a blank;
(2) And ZrO is reacted 2 And WO 3 The pressed compact is put into an electric arc sintering device, the melting parameter is 2715-3500 ℃, the control voltage range is 20-30V, and the current range is 120-140A, and the ZrW is obtained by electric arc melting 2 O 8 Melting the materials;
(3) Preparing Al-ZrW by adopting arc melting and atomizing method 2 O 8 Alloy: mixing argon with 200-300 mesh Al powder as atomizing gas for later use, adjusting the gas pressure to 3.5-5MPa 2 O 8 When the melt flows out through a conductive nozzle of the electric arc sintering device, atomizing gas is sprayed to break metal droplets to form Al-hollow ZrW 2 O 8 Collecting the cooled powder by using an ingot mold; the regulation and control of the aperture and the wall thickness are realized by adjusting the pressure of atomizing gas and the smelting parameters.
2. The light Al-ZrW with adjustable thermal expansion coefficient as defined in claim 1 2 O 8 A method for preparing a material, which is characterized in that,
the pressure range is as follows: pressure intensity range of 20-30 MPa.
3. The light Al-ZrW with adjustable thermal expansion coefficient as defined in claim 1 2 O 8 A method for preparing a material, which is characterized in that,
the temperature curve is as follows: heating to 700-850 ℃ at the speed of 8-12 ℃/min, preserving the heat for 1-1.5h, and then cooling at the speed of 8-12 ℃/min.
4. The light Al-ZrW with adjustable and controllable thermal expansion coefficient of claim 1 2 O 8 A method for preparing a material, which is characterized in that,
the argon gas introduction speed is 150-300m/s.
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