WO2024032163A1 - Procédé de préparation d'un revêtement céramique résistant à l'usure et aux hautes températures - Google Patents

Procédé de préparation d'un revêtement céramique résistant à l'usure et aux hautes températures Download PDF

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WO2024032163A1
WO2024032163A1 PCT/CN2023/102078 CN2023102078W WO2024032163A1 WO 2024032163 A1 WO2024032163 A1 WO 2024032163A1 CN 2023102078 W CN2023102078 W CN 2023102078W WO 2024032163 A1 WO2024032163 A1 WO 2024032163A1
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temperature
wear
resistant ceramic
coating
hours
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PCT/CN2023/102078
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Chinese (zh)
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王保军
拾振洪
李海洋
金传亮
回留柱
王家振
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安徽新大陆特种涂料有限责任公司
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Publication of WO2024032163A1 publication Critical patent/WO2024032163A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
    • C04B35/195—Alkaline earth aluminosilicates, e.g. cordierite or anorthite
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C12/00—Powdered glass; Bead compositions
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/62222—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining ceramic coatings
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/082—Coating starting from inorganic powder by application of heat or pressure and heat without intermediate formation of a liquid in the layer
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3241—Chromium oxides, chromates, or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/36—Glass starting materials for making ceramics, e.g. silica glass
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6562—Heating rate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567—Treatment time
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Definitions

  • the invention belongs to the technical field of ceramic coatings, and in particular is a preparation method of high-temperature-resistant and wear-resistant ceramic coatings.
  • High-temperature protection of materials from oxidation has important economic and social significance for countries around the world. After a single metal is oxidized and corroded, its shape, color, and mechanical properties will change, causing equipment damage, pipeline leakage, product pollution, and It can cause serious accidents such as combustion or explosion, as well as serious waste of resources and energy, causing huge losses to the national economy. It is estimated that the economic losses caused by metal corrosion in developed countries around the world account for approximately 3.5% to 4.2% of their gross national product every year, exceeding the total losses caused by major disasters (fires, wind disasters, earthquakes, etc.) every year. Some people even estimate that about 100 million tons of metal are corroded, scrapped and lost every year around the world.
  • Japan's Toyo Rubber Industry Co., Ltd. has developed a patented product of wear-resistant ceramic coating in recent years.
  • the main film-forming material of this coating is epoxy resin or unsaturated polyester resin, which is composed of ceramic powder as filler and curing agent.
  • Another example is an improved ceramic anti-corrosion coating disclosed in Chinese patent CN2017114572480, which uses polymers The components are not resistant to high temperatures and are not ceramic anti-corrosion coatings in the true sense. Ceramic anti-corrosion coatings are different from traditional anti-corrosion coatings such as water-based polymer coatings and clays.
  • Ceramic anti-corrosion and heat-insulating coatings can be evenly applied before curing where anti-corrosion is required. On the base material to protect or enhance the repair, it is cured to form a seamless and sealed coating. It not only has excellent anti-corrosion properties, but also has high strength, high wear resistance, high adhesion, high insulation, long service life and flame retardancy. performance. Ceramic coating is a very important fine chemical product, and its application has penetrated into various fields of the national economy. Scope of application of wear-resistant ceramic coatings: It can be widely used in cement, steel, thermal power, petrochemical industries, and defense industries in areas where many materials are subject to strong erosion, corrosion, and heavy wear.
  • High-temperature resistant ceramic coatings are widely used in high-tech fields such as aerospace, electronics, automobiles, and machinery manufacturing.
  • the key wear-resistant and anti-corrosion treatment layer suitable for various high and low-temperature equipment in cement, national defense, petroleum, chemical industry and other industries. It is a new generation of ideal material to replace the existing wear-resistant ceramic sheets and wear-resistant steel. It solves the problems caused by wind in various industries. Select problems such as abrasion, impact abrasion, and frequent component shutdowns for maintenance.
  • Those skilled in the art urgently need to develop a method for preparing high-temperature and wear-resistant ceramic coatings to meet existing usage needs and performance requirements.
  • the present invention aims to provide a preparation method of high-temperature-resistant and wear-resistant ceramic coatings.
  • a method for preparing high-temperature and wear-resistant ceramic coatings including the following steps:
  • step (1) Mix the glass-glued powder obtained in step (1) and the ceramic powder obtained in step (2) in a mass ratio of 40-50:50-60 respectively, then add 42-43% acrylic acid copolymer aqueous solution with a mass fraction of 42-43%, stir and disperse evenly to obtain a solid High temperature and wear-resistant ceramic coating with a content of 65-70%.
  • the homogeneous mixture in step one is a mixture of 15.0-29.8% CaO, 28.3-33.3% Al 2 O 3 , 40.4-56.7% SiO 2 and 1-2% ZnO in weight percentage.
  • the acrylic acid copolymer is one of maleic acid-acrylic acid copolymer or acrylic acid/itaconic acid copolymer.
  • Maleic acid-acrylic acid copolymer has good temperature resistance and strong corrosion, scale, scale, and dispersion effects. It has been used in various types of circulating cooling water systems in the past like acrylic acid/itaconic acid copolymer.
  • the present invention uses acrylic copolymer to react with glass powder to prepare sticky glass powder.
  • the coating has good coating adhesion effect at room temperature and good construction effect.
  • the blackening agent in step three is one of manganese oxide and iron chrome black.
  • the acrylic acid copolymer when the acrylic acid copolymer is mixed with the glass powder, Al 3+ and Ca 2+ ions can react with polyacrylic acid to form polycarboxylate, forming a cross-linked network structure, and The unreacted glass powders are combined together and gradually change from paste to gel. Pure ionic bonds are formed between the polycarboxylic acid chains through electrostatic attraction, and there are some complex bonds.
  • the sticky glass powder can easily absorb moisture. Can be eroded and dissolved. After further mixing with cordierite powder, it becomes hard and difficult to dissolve without pre-treatment after coating. Since cordierite contains Al 2 O 3 components, it can be evenly dispersed in the glass matrix at a certain temperature.
  • the glass components CaO and SiO 2 can react at the interface with Al 2 O 3 to form anorthite, and the speed of anorthite formation is much greater than the speed of quartz precipitation from the glass, thereby achieving the purpose of inhibiting quartz precipitation.
  • its hardness is higher.
  • the presence of high-hardness ceramic crystals in the coating will significantly increase the hardness of the composite material. Since both cordierite and anorthite have higher hardness than glass, the ceramic coating has a higher hardness.
  • the wear-resistant ceramic coating of the present invention is a non-metallic cementitious material. At the construction site, the construction personnel apply the coating evenly on Metals and concrete have high bonding strength and hardness at room temperature.
  • transition metal oxide blackening agent added can easily dissolve in it to form a solid solution.
  • Silicic acid with a cyclic structure Salt belongs to the hexagonal crystal system.
  • the transition metal ions form a solid solution, causing lattice distortion, reducing the symmetry of ion vibration and increasing the infrared radiation rate of the material.
  • the distance between transition metal ions and surrounding oxygen ions in the six-membered ring cavity is unequal, the dipole moment changes greatly, and the spectral bands overlap, increasing the emissivity.
  • the present invention has the following advantages:
  • the wear-resistant ceramic coating disclosed in the present invention is a non-metallic cementitious material that is applied manually or mechanically on the lining or surface substrate. It has extremely high mechanical strength and stiffness, high density, no large macroscopic defects, and can be effectively Resist the impact force and shear stress of the material, and use polycarboxylate gel in combination, which can form a chemical bond after sintering, resulting in high strength, good environmental compatibility, and will not react with slag. At the same time, due to this The materials are mostly high-temperature synthetic raw materials with well-developed crystals and complete structures. The ambient temperature will not have a big impact on it. It is an environmentally inert material, so it has poor environmental sensitivity and no environmental pollution.
  • the first step is to prepare sticky glass powder: the composition of the glass powder is: 15.0% CaO, 28.3% Al 2 O 3 , 56.7% SiO 2 , 2% ZnO, and the chemical purity of the raw materials used is >99.0%.
  • Various raw materials weighed according to composition are mixed evenly and put into a corundum crucible, and then melted in a silicon-aluminum rod electric furnace at 1400°C for 1 hour. After the glass is melted evenly, it is poured into water and quenched into fine particles, dried, crushed and ball milled.
  • the second step is to prepare cordierite powder: mix MgO, Al 2 O 3 and SiO 2 with a purity of >99.0% according to the stoichiometric ratio of cordierite, MgO 13.8%, Al 2 O 3 34.8%, SiO 2 51.4%, And add 1.5% mass proportion of blackening agent manganese oxide.
  • the batch materials were placed in a ball mill, absolute ethanol was added and ball milled for 24 hours, and the ball milling medium was agate balls.
  • Step 3 Preparation of coating: Mix glass powder and ceramic powder in a mass ratio of 40:60, ball-mill for 16 hours with absolute ethanol as the medium, agate balls as the ball-milling medium, and then add 42% acrylic acid copolymer aqueous solution by mass.
  • the maleic acid-acrylic acid copolymer MA/AA of Shandong Taihe Water Treatment Technology Co., Ltd. was stirred and dispersed evenly to obtain a high-temperature and wear-resistant ceramic coating with a solid content of 65%.
  • the fourth step, coating with high temperature and wear-resistant ceramic coating is the fourth step, coating with high temperature and wear-resistant ceramic coating:
  • (2)Baking stage Heating to 600°C at a rate of 50°C/h and keeping warm for 4 hours. The purpose is to completely eliminate moisture in the furnace lining.
  • Semi-sintering stage heat up to 900°C at 50°C/h, hold for 3 hours, heat up to 1200°C at 100°C/h, hold for 3 hours. The heating rate must be controlled to prevent cracks.
  • Complete sintering stage During high-temperature sintering, the sintered structure of the crucible is the basis for improving its service life. If the sintering temperature is different, the thickness of the sintering layer is insufficient, and the service life is significantly reduced.
  • the initial setting time of wear-resistant ceramic coating is not less than 30 minutes, bonding strength, Q420FRWZ35 substrate ⁇ 5.0MPa, LMJ10 concrete substrate ⁇ 2.0MPa; heat resistance, 300°C, 24h, the paint film does not blister or Cracking, non-sticking; resistant to Cold and hot alternation, room temperature of 300°C-23°C, natural cooling for 10 cycles, no bubbling, no cracking, no powdering; emissivity ⁇ ⁇ 0.923, adhesion level 2, no clear liquid or delamination.
  • the first step is to prepare sticky glass powder: the composition of the glass powder is: 29.8% CaO, 28.3% Al 2 O 3 , 40.4% SiO 2 , 1% ZnO, and the chemical purity of the raw materials used is >99.0%.
  • Various raw materials weighed according to composition are mixed evenly and put into a corundum crucible, and then melted in a silicon-aluminum rod electric furnace at 1400°C for 1 hour. After the glass is melted evenly, it is poured into water and quenched into fine particles, dried, crushed and ball milled.
  • the second step is to prepare cordierite powder: mix MgO, Al 2 O 3 and SiO 2 with a purity of >99.0% according to the stoichiometric ratio of cordierite, MgO 13.8%, Al 2 O 3 34.8%, SiO 2 51.4%. And add 1.5% mass proportion of blackening agent ferrochrome black, and then place the batch in a ball mill, add absolute ethanol, and ball mill for 24 hours.
  • the ball milling medium is agate ball.
  • Step 3 Preparation of coating: Mix glass powder and ceramic powder in a mass ratio of 50:50, ball-mill for 16 hours with absolute ethanol as the medium, agate balls as the ball-milling medium, and then add 42% acrylic acid copolymer aqueous solution by mass. Tangshan Yonghe Water Treatment Agent Co., Ltd.'s BF-211 acrylic acid/itaconic acid copolymer is stirred and dispersed evenly to obtain a high temperature and wear-resistant ceramic coating with a solid content of 70%.
  • the fourth step, coating with high temperature and wear-resistant ceramic coating is the fourth step, coating with high temperature and wear-resistant ceramic coating:
  • Coating spraying After the treated metal substrate is preheated to 30°C, the high-temperature resistant ceramic anti-corrosion and heat-insulating coating is sprayed on the substrate;
  • Baking stage Heating at a speed of 50°C/h to 600°C and keep warm for 4 hours. The purpose is to completely eliminate the moisture in the furnace lining.
  • Semi-sintering stage heat up to 900°C at 50°C/h, hold for 3 hours, heat up to 1200°C at 100°C/h, hold for 3 hours. The heating rate must be controlled to prevent cracks.
  • Complete sintering stage During high-temperature sintering, the sintered structure of the crucible is the basis for improving its service life. If the sintering temperature is different, the thickness of the sintering layer is insufficient, and the service life is significantly reduced.
  • the initial setting time of wear-resistant ceramic coating is not less than 30 minutes, bonding strength, Q420FRWZ35 substrate ⁇ 5.0MPa, LMJ10 concrete substrate ⁇ 2.0MPa; heat resistance, 300°C, 24h, the paint film does not blister or Cracking, non-sticky; resistant to alternating hot and cold temperatures, 300°C-23°C room temperature, 10 cycles of natural cooling, no foaming, no cracking, no powdering; emissivity ⁇ ⁇ 0.937, adhesion level 2, no clear liquid Or layered.
  • the test method is carried out with reference to the following standards and methods.
  • the sample preparation is carried out according to YB/T5202.2; the porosity detection of the sample is carried out according to YB/T5200; the bulk density detection is carried out according to YB/T5200; the flexural strength and compressive strength
  • the inspection is carried out according to YB/T5201; the inspection of wear value is carried out according to GB/T18301; the inspection of heating permanent line change is carried out according to YB/T5203; YB/T5200-1993 Test method for apparent porosity and bulk density of dense refractory castables; YB/T5201 -1993 Test method for room temperature flexural strength and compressive strength of dense refractory castables.
  • GB/T17617-1998 Sampling of refractory raw materials and unshaped refractory materials; YB/T5202.2-2003 Sample preparation method for unshaped refractory castables; YB/T5203-1993 Line change test method for dense refractory castables; GB/T18301 -2012 Test method for normal temperature wear resistance of refractory materials; YB/T 134-2015 High temperature infrared radiation environmentally friendly coating.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

La présente invention se rapporte au domaine technique des revêtements. L'invention divulgue un procédé pour préparer un revêtement céramique résistant à l'usure et aux hautes températures. Le revêtement céramique résistant à l'usure selon l'invention peut être appliqué sur un parement ou une surface d'un substrat d'une manière manuelle ou mécanique. Le revêtement céramique résistant à l'usure présente une résistance mécanique et une rigidité extrêmement élevées, une densité élevée, et aucun défaut macroscopique important, et peut résister efficacement à un impact et à une contrainte de cisaillement des matériaux. L'utilisation de gel de polycarboxylate permet une liaison chimique après frittage, de sorte qu'une résistance élevée est obtenue. Après densification par frittage, des cristaux de céramique de dureté élevée sont présents dans le revêtement, de sorte que le revêtement a une force de liaison et une dureté élevées à température ambiante. Un agent de noircissement d'oxyde de métal de transition ajouté est susceptible de se dissoudre dans des cristaux pour former une solution solide, de sorte que l'émissivité est améliorée, une excellente ténacité et une excellente résistance aux vibrations sont obtenues, et les dommages et les décollements dus aux impacts peuvent être efficacement empêchés. Comme une liaison ionique et une liaison covalente sont des liaisons fortes, l'énergie de liaison est élevée, les fissures ou les dommages dues aux vibrations thermiques sont moins susceptibles de se produire, et la résistance à l'usure est bonne.
PCT/CN2023/102078 2022-08-09 2023-06-25 Procédé de préparation d'un revêtement céramique résistant à l'usure et aux hautes températures WO2024032163A1 (fr)

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CN202210947689.3A CN115108820B (zh) 2022-08-09 2022-08-09 一种耐高温耐磨陶瓷涂料的制备方法
CN202210947689.3 2022-08-09

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CN115108820B (zh) * 2022-08-09 2023-03-28 安徽新大陆特种涂料有限责任公司 一种耐高温耐磨陶瓷涂料的制备方法

Citations (7)

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Publication number Priority date Publication date Assignee Title
US4196004A (en) * 1978-03-22 1980-04-01 Manfred Berretz Corrosion resistant glasses that contain chemical additives for application over metal substrates
CN1583904A (zh) * 2004-06-07 2005-02-23 华东船舶工业学院 自润滑防粘涂料及其制备方法
CN106587965A (zh) * 2016-12-06 2017-04-26 武汉钢铁股份有限公司 适用于金属基材的低温烧结高导热陶瓷涂料及其制备方法和应用
CN106752132A (zh) * 2016-12-06 2017-05-31 武汉钢铁股份有限公司 用于金属换热器的高导热防腐蚀陶瓷涂料及其制备方法和应用
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