525 results about "Yttrium" patented technology

The invention discloses a rare-earth metal arylamine group compound as well as preparation method and application thereof. The invention discloses the rare-earth metal arylamine group compound which is characterized in that a general formula of the rare-earth metal arylamine group compound is (2,6-R12PhNH)5LnLi2(THF)2, wherein Ln is a rear-earth metal selected from one of neodymium, samarium, ytterbium or yttrium; R1 is selected from one of hydrogen, methyl or isopropyl. The rare-earth metal arylamine group compound has the advantages that the rare-earth metal arylamine group compound has a definite structure; raw materials used in the preparation method are simple, easily obtained and cheap; the reaction process is simple and easily operated; the rare-earth metal arylamine group compound product is conveniently purified and the yield of the product is high; the rare-earth metal arylamine group compound has a high activity when acting as a single component catalyst to catalyze a hydrogen phosphine reaction of aldehyde or ketone and phosphite ester; the use amount of the catalyst is less; the yield is high; a substrate has wide universality; a new and simple method is provided for synthesis of a-hydroxyphosphonate.

The invention relates to the technical field of rare earth metal electrolysis cathode protection coatings, in particular to a high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating on the surface of a tungsten cathode. A metallurgically bonded strong bonding bottom layer is constructed on a tungsten substrate through surface pretreatment and reactive sintering, then an atmosphere plasma technology is adopted to spray a creep-resistant gradient layer with continuous components to buffer thermal stress, and finally a sol-gel technology is utilized to construct an extremely compact corrosion-resistant surface layer in a superposition mode. The high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating is constructed through a multi-scale and multi-mechanism synergistic effect, the problems that a tungsten cathode coating is insufficient in binding force and poor in thermal shock resistance are fundamentally solved, molten salt permeation can be blocked, and the service life of a tungsten cathode in a severe environment is remarkably prolonged.

The invention discloses an yttrium-rich neodymium-iron-boron magnet and a preparation method thereof, and belongs to the technical field of rare earth permanent magnet material preparation. The preparation method comprises the following steps: mixing yttrium-rich neodymium-iron-boron matrix alloy powder with grain boundary doped alloy powder containing Gd and / or Ho, and carrying out compression molding and sintering tempering treatment to obtain a first yttrium-rich neodymium-iron-boron magnet. According to the invention, the grain boundary doped alloy powder containing Gd and / or Ho is added into the yttrium-rich neodymium iron boron matrix alloy powder and then is sintered, so that a continuous and uniform non-magnetic thin-wall grain boundary phase structure is formed in the grain boundary, and the coercive force of the magnet is enhanced. Dy and / or Tb heavy rare earth element grain boundary diffusion is carried out based on the first yttrium-rich neodymium-iron-boron magnet after grain boundary modification, a second yttrium-rich neodymium-iron-boron magnet is obtained, the diffusion depth of Dy and / or Tb in the magnet can be increased, the utilization rate can be increased, the cost can be reduced, the coercivity of the magnet can be improved, and the adverse effect of Dy and / or Tb on residual magnetism can be reduced.

The invention provides a rare earth heat insulation coating and a preparation method thereof. The coating comprises the following components in parts by weight: 50-60 parts of acrylic resin, 10-15 parts of polyurethane modified epoxy resin, 5-8 parts of nano rare earth powder, 3-5 parts of filler, 0.5-1 part of a coalescing agent, 1-2 parts of a defoaming agent, 1-3 parts of a dispersing agent, 0.5-1 part of an ultraviolet light absorber and 1-2 parts of a silane coupling agent. Wherein the nano rare earth powder comprises lanthanum oxide powder, cerium chloride powder and yttrium hexaboride powder, and the filler comprises nano hollow microspheres, nano calcium carbonate and nano aluminum silicate. The rare earth heat insulation coating has excellent heat insulation effect and mechanical property, and can be applied to various scenes.

The invention discloses a graphite crucible silicon infiltration resistant coating based on a gradient boron nitride-silicon carbide composite structure and a preparation method thereof. The coating is composed of hexagonal boron nitride nanosheets, beta-type silicon carbide nanowires, yttrium aluminum garnet precursor sol and the like, and effective blocking of 1500-1600 DEG C silicon melt is achieved through gradient structural design and an in-situ self-repairing mechanism. The preparation process comprises the steps of h-BN activation, S C carbon layer deposition, slurry mixing and spraying and segmented heat treatment. The molten silicon contact angle of the coating reaches 158 + / -2 degrees at the temperature of 1550 DEG C, through cracks do not exist after 50 times of thermal shock circulation, the coating is effective after being continuously used for 48 batches under the industrial working condition, the problems of silicon infiltration interface adhesion and thermal shock failure of a traditional graphite crucible are solved, and the coating has remarkable industrial application value.

The method comprises the following steps: weighing an oxide precursor of metal indium, an oxide precursor of metal M, an ammonium salt and a lithium salt according to a chemical formula of indium-based halide, fully mixing, and calcining in an inert atmosphere to obtain the indium-based halide solid electrolyte. Forming an indium-based halide solid electrolyte through a solid-phase reaction; wherein M is selected from at least one of magnesium, calcium, strontium, barium, aluminum, gallium, indium, bismuth, scandium, yttrium, zinc, germanium, tin, lanthanum, cerium, samarium, gadolinium, holmium, erbium and ytterbium. The method can greatly simplify the synthesis process, reduce the raw material cost and realize industrial batch preparation.

The invention relates to the technical field of diamond saw blades, in particular to a laser welding diamond saw blade for ultra-narrow slit cutting and a preparation method of the laser welding diamond saw blade. The copper-cobalt-tin alloy material comprises the following raw materials: copper-cobalt-tin alloy powder, tungsten carbide powder, titanium-aluminum nitride, spherical cobalt powder, rare earth yttrium powder, ferrophosphorus powder and diamond abrasive particles. According to the preparation method, the core of the preparation method lies in the combination of powder metallurgy prefabrication of the tool bit and the precise laser welding process, especially the innovative laser welding process, and the prepared diamond saw blade is high in welding seam strength, narrow in heat affected zone and extremely small in matrix deformation; the problems of base body deformation, insufficient welding seam strength, short service life and the like of a traditional saw blade in the ultra-narrow seam cutting process are solved, and the saw blade is perfectly suitable for ultra-narrow seam cutting scenes with extremely high requirements for precision and stability.

The invention relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method of the high-temperature-resistant flux-cored wire. The high-temperature-resistant flux-cored wire containing the rare earth elements comprises a welding wire skin and a flux core. The flux core comprises the following raw materials of dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, ferro-aluminum, potassium cryolite, potassium titanate, sodium titanate, fine iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, nitrided ferrochrome, bismuth oxide, auxiliaries and the balance reduced iron powder. The auxiliary agent is a mixture of a zirconium-iron alloy, a titanium-iron alloy and an aluminum-magnesium alloy. A specific alloy auxiliary is introduced into the flux core to protect stable transition of rare earth yttrium, yttrium and multiple components synergistically optimize the weld joint performance, 253MA heat-resistant steel is matched, slag and electric arc regulation and control components and a reasonable process are matched, and the welding quality of the welding wire is improved.

The invention discloses antibacterial ceramic glaze and a preparation method thereof, relates to the technical field of ceramic glaze, and solves the problems that part of ceramic glaze is poor in antibacterial effect, the mechanical strength of the glaze surface is relatively low, and the production process is relatively tedious. The invention discloses antibacterial ceramic glaze and a preparation method thereof. The antibacterial ceramic glaze comprises the following components in parts by weight: 25-45 parts of potassium feldspar, 5-10 parts of nano yttrium-doped zirconium oxide, 3-10 parts of a lanthanide silver composite antibacterial agent, 7-25 parts of a fluxing agent, 1-7 parts of a wear-resistant reinforcing agent, 2-6 parts of an adhesive and 20-50 parts of deionized water. According to the invention, the nano yttrium-doped zirconium oxide and the lanthanide silver composite antibacterial agent are added into the glaze for cooperation, so that rare earth metals yttrium, lanthanum and silver in the glaze have a synergistic effect, the produced glaze can form a stable antibacterial phase at a high temperature, and meanwhile, the mechanical strength of the glaze surface is remarkably improved by the nano zirconium oxide.

The invention belongs to the technical field of aluminum alloy surface treatment, and discloses an aluminum alloy micro-arc oxidation film layer with high plasma fluorination environment resistance and a preparation method thereof.The aluminum alloy serves as a matrix, the micro-arc oxidation film layer with high plasma fluorination environment resistance is formed on the surface of the matrix, the thickness of the film layer is 10-50 micrometers, the porosity is 3-5%, and the thickness of the film layer is 10-50 micrometers. The pore diameter is 0.5-1 [mu] m, and the alpha-Al2O3 accounts for 60-80%. According to the film layer, generation of more compact Al2O3 is promoted by adding zircon salt and yttrium salt, the structure and performance of the film layer are improved through introduced zirconium and yttrium elements, and the film layer has the advantages of being high in hardness, low in porosity, high in corrosion resistance and high in wear resistance.

The invention relates to the field of laser cladding powder, in particular to wear-resistant and corrosion-resistant laser cladding powder and a preparation method thereof. The laser cladding powder is used for solving the problem that a cladding layer formed by existing laser cladding powder is poor in abrasion resistance and corrosion resistance. According to the laser cladding powder, the carbon nano tube loaded lanthanum-yttrium oxide powder and the copolymer coated titanium diboride powder are added, and the carbon nano tube and the lanthanum-yttrium oxide have a synergistic effect to refine grains, so that the corrosion resistance of a cladding layer is improved, and the carbon nano tube has good wear resistance; after the surface of the titanium diboride powder is coated with the copolymer, the dispersity of the titanium diboride is improved, a product decomposed by the copolymer reacts with the titanium diboride under the action of laser to generate titanium carbide, and the wear resistance of a cladding layer is enhanced; the laser cladding powder is suitable for prolonging the service cycle of a mold, can be used for surface strengthening of mine equipment parts, enhances the wear resistance and corrosion resistance of the mine equipment parts, reduces the maintenance frequency of the equipment, and can provide an effective solution for surface strengthening of parts in various industrial fields.

The adjustable stretcher bin used on the ambulance and comprising the novel aluminum alloy parts comprises a bottom plate, a movable frame, a platform body, a first driving mechanism used for driving the movable frame to move transversely and a lifting mechanism used for driving the platform body to ascend and descend vertically. The lower end and the lower end of the lifting mechanism are connected with the movable frame and the platform body respectively, the movable frame is made of aluminum alloy, and the aluminum alloy comprises, by weight, 6.5%-8.2% of magnesium, 0.5%-1.5% of magnesium, and the balance aluminum. 2.3% to 3.5% of zinc; 0.8% to 1.5% of copper; the rare earth element is a mixture of yttrium and cerium, and the weight ratio of the yttrium to the cerium is (1: 1.5)-(1: 2.5); 0.2% to 0.5% of silicon; 0.1% to 0.3% of manganese; and the balance of aluminum. According to the adjusting platform, transverse displacement adjustment and vertical height adjustment of the platform body are achieved, and the durability of the adjusting platform is improved through the novel aluminum alloy parts.

The invention relates to the technical field of neodymium-iron-boron magnet production, in particular to a sintered neodymium-iron-boron magnet for preparing lanthanum-cerium-yttrium and a method of the sintered neodymium-iron-boron magnet. In the invention, the cerium element is used for replacing a praseodymium-neodymium alloy, meanwhile, the lanthanum and yttrium elements are introduced according to the proportion to generate a synergistic effect to regulate and control the structure of the high-cerium-content sintered neodymium-iron-boron magnet, the yttrium element is used for inhibiting main phase grain coarsening and improving the coercive force, and the lanthanum and yttrium elements can promote the flow of a rare earth-rich liquid phase in the sintering process and improve the diffusivity, so that the high-cerium-content sintered neodymium-iron-boron magnet is obtained. The density is improved.

Provided is a rare earth magnesium alloy based on high-temperature and high-pressure hydrogenation and a preparation method thereof, which belongs to the technical field of alloy materials. In the present disclosure, a microstructure of a rare earth magnesium alloy is regulated based on high-temperature and high-pressure hydrogenation to significantly improve the plasticity of the rare earth magnesium alloy. A similar microstructure can also be achieved in other high-gadolinium (Gd) and high-yttrium (Y) systems. The present disclosure provides a unique approach to enhance the plasticity of a magnesium alloy, and makes it more likely to regulate the mechanical properties of such a rare earth alloy subsequently through other deformation processes. The rare earth magnesium alloy based on high-temperature and high-pressure hydrogenation can be used for neutron-shielding, and is a material with a structure-function integrated design that can be used in the nuclear energy field and space field.

The invention relates to the technical field of structural ceramics, and discloses an aluminum oxide ceramic, the aluminum oxide ceramic comprises a doping element, the doping element comprises at least one of magnesium, calcium, yttrium, lanthanum, zirconium and cerium, and the doping amount of the doping element is 600ppm-1000ppm. According to the aluminum oxide ceramic provided by the invention, through uniform doping of trace doping elements in aluminum oxide, modification of a grain boundary structure, grain morphology and size of the aluminum oxide ceramic is realized, so that the aluminum oxide ceramic provided by the invention is high-purity aluminum oxide ceramic with excellent mechanical strength, electrical properties and thermal conductivity.

The invention relates to the technical field of casting powder, in particular to special casting powder for nib steel, which comprises the following raw materials: calcium oxide, silicon dioxide, aluminum oxide, boric oxide, modified magnesium oxide-zirconium oxide solid solution particles and yttrium-silicon nitrogen oxygen complex phase particles. Modified magnesium oxide-zirconium oxide solid solution particles are subjected to phenyltrimethoxysilane surface coupling treatment, so that the interfacial compatibility and dispersion stability with a casting powder matrix are greatly enhanced, the viscosity of the casting powder can be stabilized at high temperature, fluctuation can be reduced, heterogeneous nucleation points can be provided, and the casting powder can be used for preparing a high-temperature-resistant casting powder material. A slag film is promoted to form a fine and uniform crystal structure, so that the lubrication continuity is greatly improved, and casting blank friction and surface defects are reduced; the yttrium-silicon-nitrogen-oxygen complex phase particles have the characteristic of promoting crystallization of silicon nitride, the yttrium element enhances the high-temperature stability and slag corrosion resistance of the particles, the crystallization behavior of slag can be regulated and controlled more lastingly and effectively, and the strength of a lubricating film is higher and more uniform.

The invention discloses a preparation method of a neodymium-yttrium-iron-boron magnet with core-shell heterostructure crystal grains. The method comprises the following steps: preparing neodymium-yttrium-iron-boron rapid-quenching amorphous strips with different yttrium contents through a melting rapid-quenching technology; carrying out crystallization annealing on the amorphous rapid quenching belt at different temperatures, and preparing powder particles with the particle size of 2-5 microns through hydrogen demolishing and jet milling; and the neodymium-yttrium-iron-boron magnet with the core-shell heterostructure is prepared through high-temperature vacuum sintering after orientation forming and cold isostatic pressing of the neodymium-yttrium-iron-boron magnet in a magnetic field. According to the method, dynamic adjustment of distribution of yttrium in a crystal grain core-shell area is achieved by controlling the crystallization temperature of an amorphous rapid quenching zone, and therefore the coercive force of the magnet is improved.

The invention relates to a composite coating for a graphite mold and a preparation method of the composite coating. The composite coating comprises an yttrium-stabilized zirconia layer, a transition layer containing yttrium-stabilized zirconia and boron nitride and a boron nitride layer which are sequentially arranged from the inner surface of the graphite mold to the outside. The composite coating provided by the invention can reduce the cooling speed of a melt on a contact interface with the mold in the casting process, reduce the occurrence of cold shut, prolong the service life of the graphite mold and reduce the demolding resistance.

Gate stack fabrication techniques are disclosed for capacitance equivalent thickness scaling. An exemplary method for forming a gate stack includes forming an interfacial layer, forming a high-k dielectric layer over the interfacial layer, and forming an electrically conductive gate layer over the high-k dielectric layer. Forming the high-k dielectric layer includes forming a group 4 element-containing dielectric layer (e.g., an HfO2 layer and / or a ZrO2 layer) and forming a rare earth element-containing dielectric layer. In some embodiments, the rare earth element-containing dielectric layer includes yttrium and oxygen, nitrogen, carbon, or a combination thereof. The electrically conductive gate layer is formed over the rare earth element-containing dielectric layer (i.e., the rare earth element-containing dielectric layer is not removed and remains in the gate stack). The rare earth element-containing dielectric layer can be formed before, after, or between forming sublayers of group 4 element-containing dielectric layer.

A catalyst suitable for dehydrogenation of hydrocarbons may include from 0.0005 wt.% to 0.1 wt.% of platinum, palladium, rhodium, iridium, ruthenium, osmium, or combinations thereof; from 0.1 wt.% to 10 wt.% of gallium, indium, thallium, or combinations thereof; from 0.1 wt.% to 5 wt.% of lanthanum, yttrium, or zirconium; at least 85 wt.% support, and from 0 wt.% to 0.001 wt.% cerium.

The invention discloses a method for in-situ leaching mining of sandstone uranium ore, the concentration of bicarbonate radical ions in ore bed water in the sandstone uranium ore is lower than 0.5 g / L, the sandstone uranium ore comprises yttrium-containing uranium ore, and the carbonate content is 1.5%-2.5%; the ore bed water serves as a solvent, 500 mL of leaching agents with different pH values adjusted through sulfuric acid are prepared, and the concentration of hydrogen peroxide in the leaching agents is 2 g / L; and determining the maximum pH value when the uranium ore in the slice sample is corroded by using the leaching agents with different pH values, and taking the maximum pH value as a critical pH value. The leaching agent with the critical pH value is used for exploiting the sandstone uranium ore, corrosion to gangue minerals in the leaching process can be reduced, the number of formed colloids and CaSO4 precipitates is reduced, the precipitates are prevented from blocking an ore bed, in addition, the method can be used for target corrosion of the refractory uranium ore, and therefore efficient leaching is achieved.

The invention discloses an yttrium-doped gradient structure environmental barrier coating and a preparation method and application thereof, the yttrium-doped gradient structure environmental barrier coating comprises a substrate, a Si-HfO2-Y bonding layer, a Yb < 2-x > Y < x > Si2O7 intermediate layer, a y > Yb < 1.6 > Y < 0.4 > DS-(1-y) Yb < 1.6 > Y < 0.4 > MS transition layer and a Yb < 2-z > Y < z > MS environmental barrier layer which are sequentially arranged, x is 0 to 1.2, y is 0.55 to 0.85, and z is 0.2 to 1.0. In the multi-layer structure of the yttrium-doped gradient structure environmental barrier coating, a continuous yttrium-doped gradient structure is formed, so that the thermal expansion coefficient of each layer in the continuous yttrium-doped gradient structure environmental barrier coating is increased in a gradient manner, the layers have good chemical compatibility, and the continuous yttrium-doped gradient structure environmental barrier coating can stably serve for a long time in the temperature range of room temperature to 1450 DEG C.

The invention discloses a manufacturing process of multifunctional stainless steel, belongs to the technical field of stainless steel manufacturing, and aims to solve the problems that an existing nano reinforced phase is easy to agglomerate and difficult to uniformly disperse in molten steel, and the performance improvement effect of a material is influenced. By introducing the rare earth-intermetallic compound composite additive, rare earth elements yttrium and scandium can effectively refine grains, purify grain boundaries and improve the strength, toughness and corrosion resistance of the material, nickel trialuminide and a steel matrix are well combined, the dispersion strengthening effect is achieved, and meanwhile the high-temperature performance and thermal conductivity of the material are improved; vanadium and niobium elements are added to form fine carbides, the material is further strengthened, the various elements and the additive have a synergistic effect, parameters of all steps of the preparation process are clear, required equipment can be realized by properly modifying existing metal material processing equipment, the process stability is good, the production efficiency is high, and the production cost is low. The method is suitable for large-scale industrial production.

The invention provides a rare earth dispersion strengthened electrothermal alloy ribbon and a preparation method thereof. The rare earth dispersion strengthened electrothermal alloy ribbon comprises the following raw materials: chromium Cr, silicon Si, titanium Ti, aluminum Al, carbon C, yttrium Y, cerium Ce, Yb ytterbium, niobium Nb, vanadium V and iron Fe. The preparation method comprises the steps that the raw materials are subjected to smelting, forming, heat treatment and oxidation film treatment, a dispersed phase of rare earth oxides Y2O3, CeO2 and Yb2O3 and carbides NbC and VC is formed, an electrothermal alloy thin strip is subjected to triple dispersion strengthening, an Al2O3 + Cr2O3 + Nb2O5 + V2O5 + Yb2O3 composite oxidation film is formed on the surface of the thin strip, and finally the electrothermal alloy thin strip with thermal shock resistance and oxidation film stability is prepared.

The application discloses a composite pre-coating, a metal bipolar plate and a preparation method. The composite pre-coating comprises a soft metal layer, a first diffusion layer, a transition metal layer, a second diffusion layer, a ceramic transition layer, a third diffusion layer and a conductive carbon layer which are sequentially stacked; the material of the soft metal layer is any one of gold, silver, tin, magnesium, indium, copper, aluminum and yttrium. The composite pre-coating has small interface contact resistance and good conductivity, can effectively resist the strain force in the stamping process, has high bonding strength, prevents the peeling and cracking of the coating due to stamping, and effectively improves the compactness and corrosion resistance.

A ceramic sintered body contains a first particular element consisting of five or six elements selected from among titanium (Ti), vanadium (V), zirconium (Zr), niobium (Nb), molybdenum (Mo), hafnium (Hf), tantalum (Ta), and tungsten (W); a second particular element consisting of one element selected from yttrium (Y) and aluminum (Al); and elemental carbon (C). The total amount of the first particular element, the second particular element, and elemental carbon is 98 at % or more. The ceramic sintered body has a plurality of microstructures having respective compositions different from one another. One of the plurality of microstructures includes a solid solution containing at least three members of the first particular element.

The present invention discloses a phase change junction film, a phase change memory and a preparation method thereof. The phase change junction film comprises a structural phase change layer and a structural stabilization layer alternately stacked; wherein the structural phase change layer is a cubic phase M x Sb2Te3 layer, the structural stabilizing layer is a hexagonal Ti y Te 1‑y layer, M is one of scandium and yttrium. The present invention is based on the cubic phase of M x Sb2Te3 structure phase change layer and hexagonal Ti y Te 1‑y The phase-shifting heterojunction film, formed by alternating stacking of structurally stable layers, offers faster operating speeds, lower operating power consumption, and improved fatigue cycle life. It also possesses the performance advantages common to heterojunction materials, namely, extremely low resistance drift and resistance fluctuation under weaker atomic diffusion conditions.

This application belongs to the field of target material production technology and discloses a method for preparing zirconium-yttrium alloy targets. First, zirconium is melted and cooled to obtain a zirconium ingot. Then, the zirconium ingot is flipped over and melted a second time. At the same time, metallic yttrium is added to the molten zirconium ingot to melt it to obtain a primary eutectic. Then, the primary eutectic is cooled to room temperature within 85 minutes to obtain a primary eutectic body. The primary eutectic body is then flipped over and melted a third time to obtain a secondary eutectic. Then, the primary eutectic is cooled to room temperature within 70 minutes to obtain a secondary eutectic body. Finally, the secondary eutectic body is machined, hot rolled, and hot isostatically pressed to obtain a zirconium-yttrium alloy target. This application improves the uniformity of zirconium and yttrium distribution by repeatedly flipping the zirconium ingot or eutectic body and remelting it. In addition, this application also discloses a zirconium-yttrium alloy target.

This invention discloses a method for repairing hot corrosion on the blade of a single-crystal gas turbine, comprising a process for removing the hot corrosion layer and a process for spraying a repair coating. In the process of removing the hot corrosion layer, high-pressure water jet is used to locally remove the hot corrosion layer on the blade. In the process of spraying the repair coating, a spray gun is used to spray the coating onto the area on the blade where the hot corrosion layer was removed. During the spraying process, the blade remains stationary while the spray gun moves horizontally. The use of high-pressure water jet technology to locally remove the hot corrosion layer on the surface of the working blade, and the optimized spraying parameters ensure that no damage is caused to the original coating and substrate, while reducing blade repair costs while ensuring thorough coating removal. By improving the spraying method and related parameters of supersonic flame spraying of nickel-cobalt-chromium-aluminum-yttrium-tantalum coatings, the coating thickness in each hot corrosion area can be effectively controlled within the range of 0.02-0.07 mm, while ensuring the antioxidant and corrosion resistance of the repair coating, meeting the blade design requirements, and ensuring that the blade returns to its pre-repair condition.

The invention discloses an H65 brass alloy doped with rare earth element yttrium and a preparation method and application thereof, and belongs to the technical field of alloy materials, and the H65 brass alloy doped with rare earth element yttrium comprises the following components in percentage by mass: 65% of copper element, 0.05-0.35% of rare earth element yttrium and the balance of zinc. Based on thermodynamic calculation, the range of the yttrium adding amount is obtained through phase change, and H65 brass and rare earth element yttrium are smelted in a vacuum induction smelting furnace. According to the H65 brass alloy doped with the rare earth element yttrium and the preparation method and application of the H65 brass alloy doped with the rare earth element yttrium, 0.5-0.35 wt% of the rare earth element yttrium is added into H65 brass in the smelting stage, impurities in the H65 brass are purified through the rare earth element yttrium, crystal grains are refined, the composition of the alpha / beta'phase is adjusted, the dezincification reaction is inhibited, and the quality of the H65 brass is improved. And the tensile strength, microhardness and corrosion resistance of the material are remarkably improved.