CN115448724A - Method for preparing silicon carbide ceramic chest insert plate by tape casting method - Google Patents
Method for preparing silicon carbide ceramic chest insert plate by tape casting method Download PDFInfo
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- CN115448724A CN115448724A CN202211078903.2A CN202211078903A CN115448724A CN 115448724 A CN115448724 A CN 115448724A CN 202211078903 A CN202211078903 A CN 202211078903A CN 115448724 A CN115448724 A CN 115448724A
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- Prior art keywords
- silicon carbide
- carbide ceramic
- insert plate
- powder
- preparing
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 187
- 239000000919 ceramic Substances 0.000 title claims abstract description 139
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 136
- 238000000034 method Methods 0.000 title claims abstract description 79
- 238000010345 tape casting Methods 0.000 title claims abstract description 36
- 210000000481 breast Anatomy 0.000 claims abstract description 70
- 238000005245 sintering Methods 0.000 claims abstract description 69
- 239000000835 fiber Substances 0.000 claims abstract description 56
- 239000002994 raw material Substances 0.000 claims abstract description 38
- 238000002360 preparation method Methods 0.000 claims abstract description 35
- 238000004537 pulping Methods 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000002002 slurry Substances 0.000 claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims abstract description 26
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 238000005303 weighing Methods 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 42
- 239000002270 dispersing agent Substances 0.000 claims description 34
- 239000011230 binding agent Substances 0.000 claims description 32
- 239000000843 powder Substances 0.000 claims description 31
- 238000001914 filtration Methods 0.000 claims description 27
- 239000004014 plasticizer Substances 0.000 claims description 26
- 238000005266 casting Methods 0.000 claims description 20
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
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- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 11
- 239000004584 polyacrylic acid Substances 0.000 claims description 11
- 229920000647 polyepoxide Polymers 0.000 claims description 11
- 235000019353 potassium silicate Nutrition 0.000 claims description 11
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 10
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 10
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 10
- 239000005642 Oleic acid Substances 0.000 claims description 10
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 10
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 10
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 10
- 239000004115 Sodium Silicate Substances 0.000 claims description 9
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 9
- 229910052863 mullite Inorganic materials 0.000 claims description 9
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 9
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 9
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 7
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 5
- 239000002113 nanodiamond Substances 0.000 claims description 5
- 235000021313 oleic acid Nutrition 0.000 claims description 5
- 229920001568 phenolic resin Polymers 0.000 claims description 5
- 239000005011 phenolic resin Substances 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 235000019794 sodium silicate Nutrition 0.000 claims description 5
- 229910052580 B4C Inorganic materials 0.000 claims description 4
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 4
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 4
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 4
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 229910052743 krypton Inorganic materials 0.000 claims description 3
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052754 neon Inorganic materials 0.000 claims description 3
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229910052724 xenon Inorganic materials 0.000 claims description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 3
- 210000000038 chest Anatomy 0.000 abstract description 19
- 239000000428 dust Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 12
- 238000005452 bending Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 229910010293 ceramic material Inorganic materials 0.000 description 3
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- 229910000838 Al alloy Inorganic materials 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/023—Armour plate, or auxiliary armour plate mounted at a distance of the main armour plate, having cavities at its outer impact surface, or holes, for deflecting the projectile
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Abstract
The invention relates to the field of chest insert plate preparation, in particular to a method for preparing a silicon carbide ceramic chest insert plate by a tape casting method, which comprises the following steps: step one, preparing materials; step two, proportioning: weighing the raw materials in parts by weight through proportioning equipment according to the parts by weight of each component of the silicon carbide ceramic breast insert plate; step three, pulping: uniformly mixing the raw materials of the components obtained by the proportion by pulping equipment to prepare the silicon carbide ceramic slurry; step four, blank making: preparing the silicon carbide ceramic slurry into a silicon carbide ceramic green sheet by adopting tape casting forming equipment; step five, sintering: obtaining a silicon carbide ceramic substrate; and step six, cutting the pieces. The silicon carbide ceramic is prepared by adopting a tape casting method, so that the dust pollution of a chest insert plate preparation process is reduced, the environment is protected, the forming material is uniform, the quality of a chest insert plate product is improved, and the weight of the chest insert plate can be reduced while the chest insert plate has excellent flexibility by combining the toughening fiber.
Description
Technical Field
The invention relates to the field of chest insert plate preparation, in particular to a method for preparing a silicon carbide ceramic chest insert plate by a tape casting method.
Background
With the continuous progress of science and technology, the technology of the silicon carbide ceramic material is continuously perfected, the silicon carbide ceramic has excellent normal-temperature mechanical properties, such as high bending strength, excellent oxidation resistance, good corrosion resistance, high abrasion resistance and low friction coefficient, and the high-temperature mechanical properties (strength, creep resistance and the like) are the best of the known ceramic materials.
In the existing chest insert plate manufacturing process of silicon carbide ceramics, the silicon carbide ceramics are granulated by a dry method, a large amount of dust is generated in the operation environment, and the mode increases the environmental pollution in the chest insert plate manufacturing process, so that relative environmental pollution treatment equipment such as air purification equipment needs to be arranged in the process, the energy consumption and the cost of the chest insert plate manufacturing process are increased, the silicon carbide ceramics used for manufacturing the chest insert plate lack toughness, and the chest insert plate has poor performance.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for preparing a silicon carbide ceramic breast insert plate by a tape casting method.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for preparing a silicon carbide ceramic breast insert plate by a tape casting method comprises the following steps:
step one, material preparation: obtaining raw materials of each component for manufacturing the silicon carbide ceramic breast insert plate through material preparation equipment;
step two, proportioning: weighing the raw materials in parts by weight through proportioning equipment according to the parts by weight of each component of the silicon carbide ceramic chest insert plate;
step three, pulping: uniformly mixing the raw materials of the components obtained by the proportion by pulping equipment to prepare the silicon carbide ceramic slurry;
step four, blank making: preparing the silicon carbide ceramic slurry into a silicon carbide ceramic green sheet by adopting tape casting forming equipment;
step five, sintering: sintering the prepared silicon carbide ceramic green sheet by sintering equipment to obtain a silicon carbide ceramic substrate;
step six, cutting the pieces: and cutting the prepared silicon carbide ceramic substrate into pieces by cutting equipment according to the shape of the breast insert plate.
Specifically, the silicon carbide ceramic breast insert plate in the first step comprises the following raw materials: silicon carbide powder, graphite powder, toughening fiber, a sintering aid, a dispersing agent, a binder, a plasticizer, absolute ethyl alcohol and deionized water;
the toughening fiber is one or more of glass fiber, mullite fiber, polypropylene fiber, carbon fiber and aromatic polyamide organic fiber;
the sintering aid is one or more of aluminum nitride powder, yttrium oxide powder, boron carbide powder and calcium fluoride powder;
the dispersing agent is one or more of polyacrylic acid, water glass, oleic acid, sodium silicate and sodium tripolyphosphate;
the binder is one or more of epoxy resin, phenolic resin, polyurethane, polyvinyl alcohol, potassium feldspar powder, quartz sand and kaolin powder;
the plasticizer is one of nano diamond, fibrofelt and nano ceramic whisker.
Specifically, in the first step, the silicon carbide powder and the graphite powder respectively sequentially undergo drying, ball milling and screening pretreatment in the material preparation process, so that the silicon carbide powder and the graphite powder which are used for preparing the silicon carbide ceramic breast insert plate are obtained, wherein the granularity of the silicon carbide powder is as follows: 10-60 μm, the particle size of the graphite powder is as follows: 5-30 μm.
Specifically, after pretreatment of the silicon carbide powder in the first step, modification treatment is performed to obtain the modified silicon carbide powder with the surface coated with silicon dioxide.
Specifically, in the second step, the silicon carbide ceramic breast insert plate comprises the following raw materials in parts by weight: 40-75 parts of silicon carbide powder, 5-18 parts of graphite powder, 5-10 parts of toughening fiber, 4-10 parts of sintering aid, 1-4 parts of dispersant, 2-6 parts of binder and 2-5 parts of plasticizer.
Specifically, the pulping in the third step comprises the following steps:
s1, mixing a dispersing agent with absolute ethyl alcohol to obtain a dispersing agent solution;
s2, adding a binder and deionized water into the pulping container, mixing to obtain a binder solution, and then adding silicon carbide powder, graphite powder, toughening fibers, a sintering aid and a plasticizer into the pulping container, and mixing with the binder solution;
s3, adding a dispersant solution into the pulping container in the S2, and uniformly mixing to obtain silicon carbide ceramic slurry;
and S4, filtering the silicon carbide ceramic slurry prepared in the S3 before entering a hopper of a casting machine through filtering equipment.
Specifically, the filtration comprises primary filtration and secondary filtration, wherein the primary filtration adopts a filter screen of 40 μm for filtration, and the secondary filtration adopts a filter screen of 10 μm for filtration.
Specifically, the casting speed of the blank-making casting method forming equipment in the fourth step is controlled to be 0.3m/min-0.5m/min.
Specifically, the sintering process in the fifth step is carried out under the protection of inert atmosphere, the sintering temperature is 1500-2100 ℃, the sintering heat preservation time is 0.5-4h, and the inert gas is one of helium, neon, argon, krypton and xenon.
The invention has the beneficial effects that:
(1) According to the method for preparing the silicon carbide ceramic chest insert plate by the tape casting method, the chest insert plate is made of the silicon carbide ceramic material, the silicon carbide ceramic is formed by the tape casting method, the silicon carbide ceramic slurry is subjected to the wet-process forming of the silicon carbide ceramic by the tape casting method, the dust pollution of the chest insert plate preparation process can be reduced, the method is environment-friendly, the formed material is uniform, the performance is improved, the preparation method is reliable, the method has the advantages of good operability and repeatability and the like, the process flow is simple, the technical risk is low, the industrial production and application are easy to realize, the parameters of the silicon carbide ceramic preparation process are controlled, and the quality of the chest insert plate product is improved.
(2) According to the method for preparing the silicon carbide ceramic breast insert plate by the tape casting method, silicon carbide ceramic molding raw material silicon carbide powder is used for preparing the breast insert plate for modification, so that the surface state of the silicon carbide powder is improved, the surface activity is reduced, the dispersity, the solid content and the powder flowability are improved, the uniformity, the stability, the high polymer compatibility and other performances of the silicon carbide powder can be improved, meanwhile, the toughening fibers are combined, the weight of the breast insert plate can be reduced while the breast insert plate has excellent flexibility, and the protective force can be increased by at least 1 time under the condition of the same mass in unit area, so that the breast insert plate has better performance.
Drawings
FIG. 1 is a flow chart of a method for preparing a silicon carbide ceramic breast insert plate by a tape casting method according to the present invention;
FIG. 2 is a flow chart of a pulping process for preparing a silicon carbide ceramic breast insert plate by a tape casting method.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1-2, the method for preparing the silicon carbide ceramic breast insert plate by the casting method comprises the following steps:
step one, material preparation: obtaining raw materials of each component for manufacturing the silicon carbide ceramic breast insert plate through material preparation equipment;
step two, proportioning: weighing the raw materials in parts by weight through proportioning equipment according to the parts by weight of each component of the silicon carbide ceramic breast insert plate;
step three, pulping: uniformly mixing the raw materials of the components obtained by the proportion by pulping equipment to prepare the silicon carbide ceramic slurry;
step four, blank making: preparing the silicon carbide ceramic slurry into a silicon carbide ceramic green sheet by adopting tape casting equipment;
step five, sintering: sintering the prepared silicon carbide ceramic green sheet by sintering equipment to obtain a silicon carbide ceramic substrate;
step six, cutting the pieces: and cutting the prepared silicon carbide ceramic substrate into pieces by a cutting device according to the shape of the breast insert plate.
Specifically, in the first step, the silicon carbide ceramic breast insert plate comprises the following raw materials in parts by weight: silicon carbide powder, graphite powder, toughening fiber, sintering aid, dispersant, binder, plasticizer, absolute ethyl alcohol and deionized water;
the toughening fiber is one or more of glass fiber, mullite fiber, polypropylene fiber, carbon fiber and aromatic polyamide organic fiber;
the sintering aid is one or more of aluminum nitride powder, yttrium oxide powder, boron carbide powder and calcium fluoride powder;
the dispersing agent is one or more of polyacrylic acid, water glass, oleic acid, sodium silicate and sodium tripolyphosphate;
the binder is one or more of epoxy resin, phenolic resin, polyurethane, polyvinyl alcohol, potassium feldspar powder, quartz sand and kaolin powder;
the plasticizer is one of nano diamond, fibrofelt and nano ceramic whisker.
Specifically, in the first step, the silicon carbide powder and the graphite powder respectively sequentially undergo drying, ball milling and screening pretreatment in the material preparation process, so that the silicon carbide powder and the graphite powder which are used for preparing the silicon carbide ceramic breast insert plate are obtained, wherein the granularity of the silicon carbide powder is as follows: 10-60 μm, the particle size of the graphite powder is as follows: 5-30 μm.
Specifically, after pretreatment of the silicon carbide powder in the first step, modification treatment is performed to obtain modified silicon carbide powder with the surface coated with silicon dioxide.
Specifically, in the second step, the silicon carbide ceramic breast insert plate comprises the following raw materials in parts by weight: 40-75 parts of silicon carbide powder, 5-18 parts of graphite powder, 5-10 parts of toughening fiber, 4-10 parts of sintering aid, 1-4 parts of dispersant, 2-6 parts of binder and 2-5 parts of plasticizer.
Specifically, the pulping in the third step comprises the following steps:
s1, mixing a dispersant with absolute ethyl alcohol to obtain a dispersant solution;
s2, adding a binder and deionized water into the pulping container, mixing to obtain a binder solution, and then adding silicon carbide powder, graphite powder, toughening fibers, a sintering aid and a plasticizer into the pulping container, and mixing with the binder solution;
s3, adding a dispersant solution into the pulping container in the S2, and uniformly mixing to obtain silicon carbide ceramic slurry;
and S4, filtering the silicon carbide ceramic slurry prepared in the S3 before entering a hopper of a casting machine through a filtering device.
Specifically, the filtration comprises primary filtration and secondary filtration, wherein the primary filtration adopts a filter screen of 40 μm for filtration, and the secondary filtration adopts a filter screen of 10 μm for filtration.
Specifically, the casting speed of the blank-making casting method forming equipment in the fourth step is controlled to be 0.3m/min-0.5m/min.
Specifically, the sintering process in the fifth step is carried out under the protection of inert atmosphere, the sintering temperature is 1500-2100 ℃, the sintering heat preservation time is 0.5-4h, and the inert gas is one of helium, neon, argon, krypton and xenon.
When the silicon carbide ceramic breast insert plate is used, raw materials of silicon carbide powder, graphite powder, toughening fibers, a sintering aid, a dispersing agent, a binder, a plasticizer, absolute ethyl alcohol and deionized water for manufacturing the silicon carbide ceramic breast insert plate are obtained through material preparation equipment, the silicon carbide powder and the graphite powder are subjected to drying, ball milling and screening pretreatment in sequence respectively in the material preparation process to obtain silicon carbide powder and graphite powder which are in accordance with the preparation of the silicon carbide ceramic breast insert plate, the raw materials are weighed according to the weight parts of the components of the silicon carbide ceramic breast insert plate through proportioning equipment, the raw materials obtained according to the proportioning are uniformly mixed through pulping equipment to obtain silicon carbide ceramic slurry, the dispersing agent and the absolute ethyl alcohol are mixed to obtain a dispersing agent solution during pulping, the binder and the deionized water are added into the pulping container to obtain a binder solution, then the silicon carbide powder, the graphite powder, the toughening fibers, the sintering aid and the plasticizer are added into the pulping container to be mixed with the binder solution, the dispersing agent solution is added into the pulping container to obtain silicon carbide ceramic slurry, the silicon carbide ceramic slurry is subjected to a casting machine to prepare a ceramic green ceramic wafer, the ceramic wafer is subjected to be subjected to a secondary silicon carbide wafer cutting through a silicon carbide wafer casting machine, and then a wafer cutting machine is prepared, and the wafer is prepared, and then the wafer is subjected to be subjected to a wafer cutting through a wafer cutting process, and subjected to a wafer casting process, and then the secondary silicon carbide wafer casting process, and the secondary silicon carbide ceramic.
The technical solution is described in detail below with reference to specific examples.
Example 1:
in this embodiment, a method for preparing a silicon carbide ceramic breast insert plate by a tape casting method includes the following steps:
step one, material preparation: the preparation method comprises the steps of obtaining raw materials of all components for manufacturing the silicon carbide ceramic breast insert plate through material preparation equipment, wherein the raw materials comprise silicon carbide powder, graphite powder, toughening fibers, sintering aids, dispersing agents, binders, plasticizers, absolute ethyl alcohol and deionized water, the silicon carbide powder and the graphite powder sequentially undergo drying, ball milling and screening pretreatment in the material preparation process respectively, and the silicon carbide powder and the graphite powder which are in accordance with the preparation of the silicon carbide ceramic breast insert plate are obtained, wherein the granularity of the silicon carbide powder is as follows: 50 μm, the particle size of the graphite powder is: 30 mu m;
step two, proportioning: according to the weight parts of the components of the silicon carbide ceramic breast insert plate, the silicon carbide ceramic breast insert plate is prepared from the raw materials in parts by weight through proportioning equipment, wherein the silicon carbide ceramic breast insert plate comprises the following raw materials in parts by weight: 70 parts of silicon carbide powder, 8 parts of graphite powder, 5 parts of toughening fibers, 7 parts of sintering aid, 3 parts of dispersant, 4 parts of binder and 3 parts of plasticizer;
step three, pulping: uniformly mixing the raw materials of the components obtained by the proportion by pulping equipment to prepare the silicon carbide ceramic slurry;
step four, blank making: preparing the silicon carbide ceramic slurry into a silicon carbide ceramic green sheet by adopting casting method forming equipment, wherein the casting speed of the blank-making casting method forming equipment is controlled to be 0.4m/min;
step five, sintering: sintering the prepared silicon carbide ceramic green compact sheet through sintering equipment to obtain a silicon carbide ceramic substrate, wherein the sintering process is carried out under the protection of inert atmosphere, the sintering temperature is 1800 ℃, and the sintering heat preservation time is 3.5 hours;
step six, cutting the pieces: and cutting the prepared silicon carbide ceramic substrate into pieces by cutting equipment according to the shape of the breast insert plate.
The toughening fiber is a mixture of glass fiber, mullite fiber, polypropylene fiber and aromatic polyamide organic fiber, and the weight ratio of the glass fiber to the mullite fiber to the polypropylene fiber to the aromatic polyamide organic fiber is 2;
the sintering aid is calcium fluoride powder;
the dispersing agent is a mixture of polyacrylic acid, water glass, oleic acid and sodium silicate, and the weight ratio of the polyacrylic acid to the water glass to the oleic acid to the sodium silicate is 2;
the adhesive is a mixture of epoxy resin, quartz sand and kaolin powder, and the weight ratio of the epoxy resin to the quartz sand to the kaolin powder is (2);
the plasticizer adopts nano diamond.
Example 2:
in this embodiment, a method for preparing a silicon carbide ceramic breast insert plate by a tape casting method includes the following steps:
step one, material preparation: the preparation method comprises the steps of obtaining raw materials of all components for manufacturing the silicon carbide ceramic breast insert plate through material preparation equipment, wherein the raw materials comprise silicon carbide powder, graphite powder, toughening fibers, sintering aids, dispersing agents, binders, plasticizers, absolute ethyl alcohol and deionized water, the silicon carbide powder and the graphite powder sequentially undergo drying, ball milling and screening pretreatment in the material preparation process respectively, and the silicon carbide powder and the graphite powder which are in accordance with the preparation of the silicon carbide ceramic breast insert plate are obtained, wherein the granularity of the silicon carbide powder is as follows: 40 μm, the particle size of the graphite powder is: 20 mu m;
step two, proportioning: according to the weight parts of each component of the silicon carbide ceramic breast insert plate, the silicon carbide ceramic breast insert plate is weighed by the raw materials through proportioning equipment according to the weight parts, wherein the weight parts of each component of the silicon carbide ceramic breast insert plate are as follows: 65 parts of silicon carbide powder, 10 parts of graphite powder, 6 parts of toughening fibers, 8 parts of sintering aid, 2 parts of dispersant, 5 parts of binder and 4 parts of plasticizer;
step three, pulping: uniformly mixing the raw materials of the components obtained by the proportion by pulping equipment to prepare a slurry, thereby obtaining silicon carbide ceramic slurry;
step four, blank making: preparing the silicon carbide ceramic slurry into a silicon carbide ceramic green sheet by adopting casting method forming equipment, wherein the casting speed of the blank-making casting method forming equipment is controlled to be 0.3m/min;
step five, sintering: sintering the prepared silicon carbide ceramic green sheet by sintering equipment to obtain a silicon carbide ceramic substrate, wherein the sintering process is carried out under the protection of inert atmosphere, the sintering temperature is 1900 ℃, and the sintering heat preservation time is 3 hours;
step six, cutting the pieces: and cutting the prepared silicon carbide ceramic substrate into pieces by a cutting device according to the shape of the breast insert plate.
The toughening fiber is a mixture of glass fiber, mullite fiber, carbon fiber and aramid organic fiber, and the weight ratio of the glass fiber to the mullite fiber to the carbon fiber to the aramid organic fiber is 2;
the sintering aid is boron carbide powder;
the dispersing agent is a mixture of polyacrylic acid, water glass, oleic acid and sodium tripolyphosphate, and the weight ratio of the polyacrylic acid to the water glass to the oleic acid to the sodium tripolyphosphate is (2);
the binder is a mixture of epoxy resin and kaolin powder, and the weight ratio of the epoxy resin to the kaolin powder is 2;
the plasticizer is a fiber felt.
Example 3:
in this embodiment, a method for preparing a silicon carbide ceramic breast insert plate by a tape casting method includes the following steps:
step one, material preparation: the preparation method comprises the steps of obtaining raw materials of all components for manufacturing the silicon carbide ceramic breast insert plate through material preparation equipment, wherein the raw materials comprise silicon carbide powder, graphite powder, toughening fibers, sintering aids, dispersing agents, binders, plasticizers, absolute ethyl alcohol and deionized water, the silicon carbide powder and the graphite powder sequentially undergo drying, ball milling and screening pretreatment in the material preparation process respectively, and the silicon carbide powder and the graphite powder which are used for preparing the silicon carbide ceramic breast insert plate are obtained, wherein the granularity of the silicon carbide powder is as follows: 30 μm, the particle size of the graphite powder is: 15 μm;
step two, proportioning: according to the weight parts of each component of the silicon carbide ceramic breast insert plate, the silicon carbide ceramic breast insert plate is weighed by the raw materials through proportioning equipment according to the weight parts, wherein the weight parts of each component of the silicon carbide ceramic breast insert plate are as follows: 60 parts of silicon carbide powder, 12 parts of graphite powder, 9 parts of toughening fibers, 7 parts of sintering aid, 3 parts of dispersant, 5 parts of binder and 4 parts of plasticizer;
step three, pulping: uniformly mixing the raw materials of the components obtained by the proportion by pulping equipment to prepare a slurry, thereby obtaining silicon carbide ceramic slurry;
step four, blank making: preparing the silicon carbide ceramic slurry into a silicon carbide ceramic green sheet by adopting tape casting equipment, wherein the tape casting speed of the tape casting equipment for preparing the blank is controlled to be 0.4m/min;
step five, sintering: sintering the prepared silicon carbide ceramic green compact sheet through sintering equipment to obtain a silicon carbide ceramic substrate, wherein the sintering process is carried out under the protection of inert atmosphere, the sintering temperature is 2000 ℃, and the sintering heat preservation time is 2.5 hours;
step six, cutting the pieces: and cutting the prepared silicon carbide ceramic substrate into pieces by cutting equipment according to the shape of the breast insert plate.
The toughening fiber is a mixture of glass fiber, polypropylene fiber, carbon fiber and aromatic polyamide organic fiber, and the weight ratio of the glass fiber to the polypropylene fiber to the carbon fiber to the aromatic polyamide organic fiber is 2;
the sintering aid is yttrium oxide powder;
the dispersing agent is a mixture of polyacrylic acid, water glass, oleic acid, sodium silicate and sodium tripolyphosphate, and the weight ratio of the polyacrylic acid to the water glass to the oleic acid to the sodium silicate to the sodium tripolyphosphate is 3;
the binder is a mixture of epoxy resin, polyurethane and kaolin powder, and the weight ratio of the epoxy resin to the polyurethane to the kaolin powder is (2): 2;
the plasticizer adopts nano ceramic whiskers.
Example 4:
in this embodiment, a method for preparing a silicon carbide ceramic breast insert plate by a tape casting method includes the following steps:
step one, material preparation: the preparation method comprises the steps of obtaining raw materials of all components for manufacturing the silicon carbide ceramic breast insert plate through material preparation equipment, wherein the raw materials comprise silicon carbide powder, graphite powder, toughening fibers, sintering aids, dispersing agents, binders, plasticizers, absolute ethyl alcohol and deionized water, the silicon carbide powder and the graphite powder sequentially undergo drying, ball milling and screening pretreatment in the material preparation process respectively, and the silicon carbide powder and the graphite powder which are used for preparing the silicon carbide ceramic breast insert plate are obtained, wherein the granularity of the silicon carbide powder is as follows: 20 μm, the particle size of the graphite powder is: 10 mu m;
step two, proportioning: according to the weight parts of each component of the silicon carbide ceramic breast insert plate, the silicon carbide ceramic breast insert plate is weighed by the raw materials through proportioning equipment according to the weight parts, wherein the weight parts of each component of the silicon carbide ceramic breast insert plate are as follows: 53 parts of silicon carbide powder, 15 parts of graphite powder, 10 parts of toughening fibers, 8 parts of sintering aid, 3 parts of dispersant, 6 parts of binder and 5 parts of plasticizer;
step three, pulping: uniformly mixing the raw materials of the components obtained by the proportion by pulping equipment to prepare the silicon carbide ceramic slurry;
step four, blank making: preparing the silicon carbide ceramic slurry into a silicon carbide ceramic green sheet by adopting tape casting equipment, wherein the tape casting speed of the tape casting equipment for preparing the blank is controlled to be 0.4m/min;
step five, sintering: sintering the prepared silicon carbide ceramic green sheet by sintering equipment to obtain a silicon carbide ceramic substrate, wherein the sintering process is carried out under the protection of inert atmosphere, the sintering temperature is 2000 ℃, and the sintering heat preservation time is 2.5 hours;
step six, cutting the pieces: and cutting the prepared silicon carbide ceramic substrate into pieces by a cutting device according to the shape of the breast insert plate.
The toughening fiber is a mixture of glass fiber, mullite fiber and aromatic polyamide organic fiber, and the weight ratio of the glass fiber to the mullite fiber to the aromatic polyamide organic fiber is (2);
the sintering aid is aluminum nitride powder;
the dispersing agent is a mixture of polyacrylic acid, water glass, sodium silicate and sodium tripolyphosphate, and the weight ratio of the polyacrylic acid to the water glass to the oleic acid to the sodium silicate to the sodium tripolyphosphate is 3;
the adhesive is a mixture of epoxy resin, phenolic resin, quartz sand and kaolin powder, and the weight ratio of the epoxy resin to the phenolic resin to the quartz sand to the kaolin powder is (2);
the plasticizer adopts nano diamond.
The silicon carbide ceramic breast insert plates prepared in examples 1 to 4 were respectively tested for thermal conductivity, hardness and bending strength, and the test results are shown in table 1.
TABLE 1
| Thermal conductivity W/(m X K) | Hardness (HRA) | Bending Strength (MPa) | |
| Example 1 | 143 | 98.2 | 28 |
| Example 2 | 142 | 98.3 | 28 |
| Example 3 | 145 | 98.6 | 29 |
| Example 4 | 146 | 98.7 | 29 |
The heat conductivity test adopts a KEM rapid heat conductivity coefficient tester for testing;
testing the hardness of the ceramic layer on the surface of the aluminum alloy plate by a Mohs hardness test method;
the bending strength refers to the capability of the material to resist bending without fracture, the bending strength of the material measured in the bending test refers to the maximum normal stress of the tensile side surface when a sample is damaged, a universal material testing machine is used for testing, examples 1-4 are all tested by a three-point bending method, and a three-point bending strength formula is tested: r = (3F × L)/(2b × h), where F is the failure load, L is the span, b is the width, and h is the thickness.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A method for preparing a silicon carbide ceramic breast inserting plate by a tape casting method is characterized by comprising the following steps:
step one, preparing materials: obtaining raw materials of each component for manufacturing the silicon carbide ceramic breast insert plate through material preparation equipment;
step two, proportioning: weighing the raw materials in parts by weight through proportioning equipment according to the parts by weight of each component of the silicon carbide ceramic breast insert plate;
step three, pulping: uniformly mixing the raw materials of the components obtained by the proportion by pulping equipment to prepare the silicon carbide ceramic slurry;
step four, blank making: preparing the silicon carbide ceramic slurry into a silicon carbide ceramic green sheet by adopting tape casting forming equipment;
step five, sintering: sintering the prepared silicon carbide ceramic green compact sheet through sintering equipment to obtain a silicon carbide ceramic substrate;
step six, cutting the pieces: and cutting the prepared silicon carbide ceramic substrate into pieces by cutting equipment according to the shape of the breast insert plate.
2. The method for preparing the silicon carbide ceramic breast insert plate by the tape casting method according to claim 1, wherein the method comprises the following steps: the silicon carbide ceramic breast insert plate in the first step comprises the following raw materials: silicon carbide powder, graphite powder, toughening fiber, a sintering aid, a dispersing agent, a binder, a plasticizer, absolute ethyl alcohol and deionized water;
the toughening fiber is one or more of glass fiber, mullite fiber, polypropylene fiber, carbon fiber and aromatic polyamide organic fiber;
the sintering aid is one or more of aluminum nitride powder, yttrium oxide powder, boron carbide powder and calcium fluoride powder;
the dispersing agent is one or more of polyacrylic acid, water glass, oleic acid, sodium silicate and sodium tripolyphosphate;
the binder is one or more of epoxy resin, phenolic resin, polyurethane, polyvinyl alcohol, potassium feldspar powder, quartz sand and kaolin powder;
the plasticizer is one of nano diamond, fibrofelt and nano ceramic whisker.
3. The method for preparing the silicon carbide ceramic breast insert plate by the tape casting method according to claim 2, wherein the method comprises the following steps: in the first step, the silicon carbide powder and the graphite powder respectively sequentially undergo drying, ball milling and screening pretreatment in the material preparation process to obtain the silicon carbide powder and the graphite powder which are used for preparing the silicon carbide ceramic breast insert plate, wherein the granularity of the silicon carbide powder is as follows: 10-60 μm, the particle size of the graphite powder is: 5-30 μm.
4. The method for preparing the silicon carbide ceramic breast insert plate by the tape casting method according to claim 3, wherein the method comprises the following steps: and (4) after pretreatment of the silicon carbide powder in the first step, carrying out modification treatment to obtain the modified silicon carbide powder with the surface coated with silicon dioxide.
5. The method for preparing the silicon carbide ceramic breast insert plate by the tape casting method according to claim 3, wherein the method comprises the following steps: in the second step, the silicon carbide ceramic breast insert plate comprises the following raw materials in parts by weight: 40-75 parts of silicon carbide powder, 5-18 parts of graphite powder, 5-10 parts of toughening fiber, 4-10 parts of sintering aid, 1-4 parts of dispersant, 2-6 parts of binder and 2-5 parts of plasticizer.
6. The method for preparing the silicon carbide ceramic breast insert plate by the tape casting method according to claim 1, wherein the method comprises the following steps: the pulping in the third step comprises the following steps:
s1, mixing a dispersant with absolute ethyl alcohol to obtain a dispersant solution;
s2, adding a binder and deionized water into the pulping container, mixing to obtain a binder solution, and then adding silicon carbide powder, graphite powder, toughening fibers, a sintering aid and a plasticizer into the pulping container, and mixing with the binder solution;
s3, adding a dispersant solution into the pulping container in the S2, and uniformly mixing to obtain silicon carbide ceramic slurry;
and S4, filtering the silicon carbide ceramic slurry prepared in the S3 before entering a hopper of a casting machine through filtering equipment.
7. The method for preparing the silicon carbide ceramic breast insert plate by the tape casting method according to claim 6, wherein the method comprises the following steps: the filtration comprises primary filtration and secondary filtration, wherein the primary filtration adopts a filter screen of 40 mu m to carry out filtration, and the secondary filtration adopts a filter screen of 10 mu m to carry out filtration.
8. The method for preparing the silicon carbide ceramic breast insert plate by the tape casting method according to claim 1, wherein the method comprises the following steps: the casting speed of the blank-making casting method forming equipment in the fourth step is controlled to be 0.3m/min-0.5m/min.
9. The method for preparing the silicon carbide ceramic breast insert plate by the tape casting method according to claim 1, wherein the method comprises the following steps: and the sintering process in the fifth step is carried out under the protection of inert atmosphere, the sintering temperature is 1500-2100 ℃, the sintering heat preservation time is 0.5-4h, and the inert gas adopts one of helium, neon, argon, krypton and xenon.
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