1034 results about "Metal coating" patented technology

The invention discloses high-strength concrete and a preparation method thereof in the field of concrete. The high-strength concrete is prepared from the following raw materials in parts by weight: superfine sulphoaluminate cement; coarse aggregate; quartz sand; silica fume; coal ash; nano metakaolin; silicon carbide whiskers; a graphene oxide; a pH responsive microcapsule; coating the steel fibers with liquid metal; a carbon nanotube; and a polycarboxylic acid water reducer. Release of the repairing agent is accurately regulated and controlled by adopting the pH response microcapsule, the interface performance is enhanced by combining with the liquid metal coating steel fiber, and the composite dispersion process of the nano material is optimized. Wherein the environment response efficiency of the microcapsule is remarkably improved through the collaborative design of a calcium oxide-slow release agent system and a methyl methacrylate / acrylic acid copolymerization shell layer; according to the gallium-based liquid metal coating, metallurgical bonding of fibers and a matrix is achieved through the low-melting-point characteristic, and traditional physical bonding limitation is broken through.

The invention discloses equipment and technology for plasma spray welding of a metal coating on the surface of a ball valve, and relates to the technical field of ball valve machining, the equipment comprises a base, two sliding tables, a lifting table, a clamping assembly, a guide rail mechanism, a sliding seat, a first telescopic support, a second telescopic support and a spray gun rod, the two sliding tables are symmetrically arranged on the base in a sliding mode, and the lifting table is arranged on the sliding tables; a clamping assembly is arranged on the lifting table, the guide rail mechanism is fixedly arranged at the center of the base, the sliding base is arranged above the guide rail mechanism in a sliding mode, a first telescopic support is fixedly arranged on the sliding base, a second telescopic support is vertically and fixedly arranged at the output end of the first telescopic support, and the spray gun rod is fixedly installed on the second telescopic support. The guide rail mechanism comprises a fixed table, a sliding block, a hydraulic telescopic rod, a guide block, a sleeve gasket and a connecting block. According to the method, the remodeling time and cost can be greatly reduced, the application range is effectively expanded, and the spray welding efficiency of the ball valve is further improved.

The invention discloses an annealing temperature control method based on a differentiated ohmic contact material, and aims to solve the problems that the annealing temperature of an N-surface Au / Ge ohmic contact layer of an existing AlGaInP-based red light Micro-LED is not accurately monitored, a temperature field is not uniform and is difficult to detect, and abnormal response lags, the method comprises seven steps of processes (two times of patterning, two times of metal coating, two times of photoresist removal, annealing and observation), and the annealing temperature of the N-surface Au / Ge ohmic contact layer of the existing AlGaInP-based red light Micro-LED is controlled. Preparing a first Au / Ge ohmic contact layer (for function) and a second Au / Ge / Ni ohmic contact layer (for detection) on the N surface of the wafer; by means of the characteristic that Ni inhibits Au / Ge agglomeration, the two-layer agglomeration state difference is observed through an optical microscope, and the temperature is judged (in the normal state, the former agglomerates, and the latter does not agglomerate); the method is convenient in detection, supports batch detection, can find temperature abnormity in real time, improves the process stability, and is suitable for industrial mass production.

The invention relates to a metallized microbubble and a preparation method thereof, a construction method of a multifunctional composite probe, and a rapid bacterium capturing and sterilizing method, and belongs to the technical field of functional material preparation. The method aims at solving the technical problems that in the prior art, a metal coating on the surface of the hollow glass microbubble is not uniform, combination is not firm, and stability is poor. According to the technical scheme, the method is characterized by comprising the following steps: mixing surface-activated hollow glass microbubbles with a polyethyleneimine solution for reaction, and washing and drying to obtain polyethyleneimine-coated hollow glass microbubbles; then reacting with a single-stranded DNA buffer solution to obtain an intermediate product loaded with DNA; then introducing a silver nitrate solution to load silver ions on the surface of the compound; and finally, reducing through a sodium borohydride solution to prepare the metallized microbubbles. The metalized microbubbles prepared by the method can be used for constructing a multifunctional composite probe to realize efficient capture and synergistic antibiosis of targets such as bacteria.

Embodiments of the present disclosure provide methods for forming optical device structures. An exemplary method generally includes disposing a first material device layer on a substrate; patterning a portion of the first material device layer to form a first plurality of device structures in the first material device layer; disposing a second material device layer on an unpatterned portion of the first device material layer; performing a nanoimprint lithography process on the second material device layer to form a second plurality of device structures on the first material device layer; and disposing a metal coating on the second plurality of device structures.

The invention relates to the technical field of electricity testing devices, in particular to a non-contact electricity testing device for alternating current and direct current overhead line mixing and an electricity testing method.The non-contact electricity testing device comprises a moving plate and an electrode plate, the moving plate is rotationally arranged, and the moving plate and the electrode plate are arranged in the extending direction of the rotating axis of the moving plate; metal coatings are arranged on the surfaces, close to and away from the movable plate, of the electrode plates. Through the design that the moving plate and the electrode plate are arranged in the direction of the rotating axis, the double-sided metal coating structure of the electrode plate is combined, the alternating-current and direct-current electric field is detected through one device, integration of the electricity testing device is achieved, and the operation efficiency is improved.

The invention discloses a corrosion-resistant anti-static composite structure for a storage tank and a preparation method of the corrosion-resistant anti-static composite structure, a conductive grid layer is innovatively introduced into the structure, a corrosion-resistant resin coating and a corrosion-resistant anti-static metal coating are arranged at the same time, and by controlling the relative position and the section thickness size of each layer structure, the corrosion-resistant anti-static composite structure is obtained. The bonding strength of the anti-corrosion and anti-static structure and the storage tank base body can be improved, the problem that the anti-static performance of a traditional anti-static structure is low due to the fact that conductive filler is not evenly dispersed or abraded can be solved, and the anti-corrosion and anti-static storage tank has excellent, lasting and reliable anti-corrosion performance and anti-static performance; in the preparation process, by controlling the operation process and related parameters and increasing the modification process, the combination effect between the layers in the composite structure is further enhanced, and a conductive network path with excellent charge transfer capacity is constructed, so that the composite structure has high corrosion resistance and antistatic performance and long service life.

The embodiment of the invention discloses a scanning NV probe microscope which comprises an atomic force microscopy system used for detecting surface topography information of a sample and an optical detection magnetic resonance system used for detecting surface magnetic field distribution information of the sample, and the atomic force microscopy system comprises a vibration arm and a diamond probe. The optical detection magnetic resonance system comprises an NV color center, a transition excitation light path and a fluorescence detection light path; a sample to be scanned and the transition excitation light path are respectively positioned on two opposite sides of the diamond probe, and the transition excitation light path and the fluorescence detection light path are positioned on the same side of the diamond probe; a first metal coating film is arranged on one side, close to the sample, of the diamond probe and is used for blocking surface fluorescence of the sample. According to the scanning NV probe microscope provided by the embodiment of the invention, the metal coating is arranged at the bottom of the diamond probe to block stray fluorescence from the surface of the sample, so that the problems of low magnetic field imaging signal-to-noise ratio and limited measurement precision of the existing scanning NV probe microscope are solved.

The invention discloses a seawater conductivity sensor electrode material based on a copper-nickel-based nanostructure and a preparation method, the electrode material comprises: a substrate, a copper-nickel-based nanostructure layer being formed on the surface of the substrate; the substrate comprises an insulating compound and a coating coated on the surface of the insulating compound, the insulating compound comprises at least one of high-resistance silicon, silicon oxide, aluminum oxide ceramic and plastic, the coating comprises a metal coating and / or a semiconductor coating, and the copper-nickel-based nanostructure layer is in a dendritic crystal or cluster form. The copper-nickel alloy nanostructure is a core material of the electrode, so that the electrode material has high specific surface area and rich active sites, the measurement accuracy and measurement limit of the electrode material can be improved, the service life can be prolonged, the manufacturing cost can be reduced, and the application requirements of the ocean Internet of Things can be met.

A steel sheet, coated with a metallic coating including, by weight percent, from 7.5 to 9.0% of zinc, from 1.1 to 4.0% of silicon, from 1.1 to 8.0% of magnesium, up to 3.0% of iron, optional elements chosen from Pb, Ni, Zr, or Hf, the content by weight of each element being less than 0.3%, optionally up to 100 ppm of Calcium and unavoidable impurities up to 0.02%, a balance being aluminum, and wherein the coating weight of the metallic coating is from 50 to 500 g / m2 for the sum of both sides of the-steel sheet.

The invention discloses a spectral selective greenhouse cooling water-saving film and a preparation method thereof. The film sequentially comprises a polymer thermal radiation material layer, a metal coating and a polymer multilayer optical film from top to bottom. Wherein the polymer thermal radiation material layer on the top layer can dissipate heat in a thermal radiation form; the metal coating on the middle layer is used for reflecting near-infrared light with the wavelength larger than 800 nm; the polymer multilayer optical film on the bottom layer is used for reflecting green light of 500-600 nm. The spectrum separation technology and the radiation refrigeration technology are coupled, the polymer multilayer film and the metal coating are combined, the polymer multilayer film is used for replacing a dielectric layer in traditional coating, the technological process is effectively simplified, the cost is greatly reduced, and the machining speed is increased; in addition, the polymer multilayer film can serve as a protective layer of a metal coating, the oxidation speed of the metal coating is slowed down, and the overall durability of the film material is improved.

The utility model provides a high-temperature superconducting cable and a high-temperature superconducting magnet. The high-temperature superconducting cable comprises a metal coating layer and a plurality of superconducting sub-cables arranged in an array. The superconducting sub-cable comprises a superconducting conductor extending in the cable extending direction and a heat conduction layer wrapping the periphery of the superconducting conductor, and the periphery of the superconducting conductor is tightly attached to the inner wall of the heat conduction layer. A first attaching part and a first gap part are arranged between the outer walls of the heat conduction layers of the adjacent parts of any two adjacent superconducting sub-cables, and a second attaching part and a second gap part are arranged between the inner wall of the metal coating layer and the outer wall of the heat conduction layer of the closest superconducting sub-cable. The first gap portion and the second gap portion each form at least one cooling channel. The current of the quenched superconducting sub-cable can be shunted to the heat conduction layer of the adjacent superconducting sub-cable through the heat conduction layer, and the heat conduction layer can exchange heat with the cooling liquid of the cooling channel, so that the temperature of the superconducting sub-cable can be quickly reduced to a superconducting interval, and the cable can be prevented from being burnt down due to quenching.

The invention provides a dynamic polarization three-dimensional imaging system, which relates to the technical field of anti-counterfeiting encryption and comprises a light source, a polarization film and a color three-dimensional imaging module which are sequentially arranged along a light path, the light source is used for providing visible band incident light; the polarizing film is configured to transmit TM polarized light when rotating 0 degree and transmit TE polarized light when rotating 90 degrees; the color three-dimensional imaging module comprises a micro lens array, a transparent spacing layer and a micro image-text array which are sequentially arranged along a light path; the micro image-text array comprises a metal coating layer, a grating layer and a glass substrate which are stacked from top to bottom, wherein the grating layer forms a Fabry-Perot-like microcavity resonance structure; the polarization state of the incident light is switched by rotating the polarization film, so that the stereo image of the micro image-text array is dynamically switched among an appearing state, a hiding state or a color changing state. According to the invention, wide-color-gamut and dynamically-adjustable color stereo imaging is realized, and the complexity and the identifiability of anti-counterfeiting encryption are improved.

The invention discloses a multi-layer polymeric membrane functional current collector and a preparation method thereof, a pole piece and a battery, and the preparation process comprises the following steps: S1, blending and granulating ultra-high molecular weight polyethylene and high density polyethylene to prepare a composite layer raw material; s2, adding the composite layer raw material and the middle layer nylon raw material into a screw extruder, and carrying out co-extrusion casting to form a composite layer-middle layer-composite layer three-layer structure film; s3, carrying out plasma activation treatment on the obtained three-layer structure film; s4, forming nanoscale pits in the outer surface of the three-layer structure film by dipping the three-layer structure film in the treating fluid; and S5, preparing a metal layer on the outer side of the three-layer structure film to obtain the multi-layer polymer film functional current collector. Through material blending optimization, multi-layer structure design and surface functionalization treatment, the mechanical property and dimensional stability of the current collector base film and the binding force between the current collector base film and a metal coating are remarkably improved.

Compositions and methods involving latent base-catalyzed Michael addition reaction are described herein. The compositions described herein are derived from a Michael addition reaction and provide coatings, including primer coatings and direct-to-metal coatings that have optimal adhesion, corrosion resistance, and cure response when applied to a substrate and cured.

Captured carbon dioxide, preferably carbon dioxide captured from emissions such as carbon dioxide from flue gas emissions, can be provided in the form of purified carbon dioxide after undergoing one or more purification processes, such that the purified carbon dioxide is capable of being utilized in the formation of one or more other economically viable chemicals, such as an oxalate salt and / or oxalic acid via an electrochemical reduction process. The electrochemical reduction process utilizing a modified cathode having a metal coating for the efficient and high yield of oxalate salt and / or oxalic acid. The economically viable chemicals derived from captured carbon dioxide capable of being utilized in other applications including the treatment of waste-products, such as in the neutralization of red mud and / or the extraction of rare earth minerals from neutralized red mud.

The invention discloses a lubricating process of a surface treatment process of a corrosion-resistant steel member, which comprises the following steps: S1, rust removal: carrying out first rust removal on the steel member by adopting a chemical mode, and then carrying out second rust removal on the steel member by adopting a mechanical mode; s2, oil removal: removing non-saponified oil stains by using an organic solvent, and removing saponified animal and vegetable oil by using an alkaline solvent; s3, phosphate is adopted for phosphating treatment, and a microporous structure layer is formed; s4, spraying is conducted on the steel component, and a metal coating is formed; s5, spraying an organic sealing layer on the metal coating; s6, drying: drying by adopting a dryer or a natural air-drying mode; and S7, sealing pores by using a silane impregnant to form a hydrophobic protection layer. Compared with the prior art, the problems that the protection effect is poor, severe environments cannot be handled and the service life is short due to the fact that anti-corrosion paint is mostly coated on the surfaces of the steel components for protection in existing steel component anti-corrosion treatment can be solved.

The utility model relates to a gasification burner for a coal water slurry gasification furnace. Comprising a gasification burner body, a metal protective cover is arranged on the gasification burner body, the metal protective cover comprises a fixed protective part arranged on the outer circumference of the gasification burner body and an end face protective part arranged on the end face of the gasification burner body, and the fixed protective part and the end face protective part are of an integrated structure; a through hole used for gasifying materials sprayed out of the burner body is formed in the center of the end face protection part. A high-temperature-resistant metal coating is fixedly arranged on the outer circumferential surface of the fixed protection part; the gasification burner has the advantages that the gasification burner body can be effectively protected, and the service life of the gasification burner body is prolonged.

The invention discloses a position-sensitive reactor core optical fiber detector and a preparation method thereof, and relates to the field of radiation detection, the position-sensitive reactor core optical fiber detector comprises a probe (1), an optical fiber bundle (2) and an electronics system (3), and the probe (1), the optical fiber bundle (2) and the electronics system (3) are externally connected in sequence by using a high-temperature-resistant sealant (4); the probe (1) comprises a scintillator (11), an optical glass light guide rod (12) and a protective shell (13); the scintillator (11) and the optical glass light guide rod (12) are sequentially arranged according to a sandwich structure and are arranged in the protective shell (13); the optical fiber bundle (2) comprises a metal coating optical fiber (21), a high-temperature-resistant adhesive (22) and a stainless steel metal coil (23). The problems that an existing optical fiber detector cannot be used for detection work under the conditions of high temperature, high pressure and strong irradiation, and the existing optical fiber detector can only achieve flux detection and cannot be used for position detection are solved.

The invention belongs to the technical field of battery electrodes, and particularly relates to a coated modified ternary positive electrode material as well as a preparation method and application thereof. The invention provides a coating modified ternary positive electrode material. The coating modified ternary positive electrode material comprises a ternary positive electrode material and a high-entropy metal coating layer coating the surface of the ternary positive electrode material, the metal elements in the high-entropy metal coating layer comprise Li, Al and Ti; the metal elements in the high-entropy metal coating layer further comprise at least one of Mg, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Sn, Ta and W. The coated modified ternary positive electrode material provided by the invention is excellent in specific capacity, first effect and cycle stability.

The invention discloses a diamond-metal composite material with six surfaces coated with metal as well as a processing method and application of the diamond-metal composite material. The diamond-metal composite material with the six surfaces coated with the metal is a composite material formed by sintering a hexahedral metal shell and at least one diamond-metal composite layer arranged in the metal shell. The diamond-metal composite layer comprises a metal net and diamond particles, the surfaces of the diamond particles are coated with coatings, the diamond particles are arranged in grids of the metal net, and gaps between the grids and the diamond particles are filled with metal powder; metal atoms in the metal net penetrate through the coating to diffuse towards the surface of the diamond, and a mixed transition area is formed. The structural composition of the diamond-metal composite material is adjusted, and the surface of the diamond-metal composite material is coated with metal to form the diamond-metal composite material with six surfaces coated with metal, so that the diamond in the composite material is prevented from being exposed, and the problem that the surface of the diamond is difficult to machine and gold is difficult to plate is solved.

The invention belongs to the field of aqueous zinc ion batteries, and provides a zinc composite negative electrode and a preparation method and application thereof. The zinc composite negative electrode is provided with a current collector layer and two zinc foil layers, the current collector layer is arranged between the two zinc foil layers, the surface of the current collector layer is provided with a metal coating, metal is one or more than two of Bi, Ni, Sn, Te, MXene and a carbon material, and the current collector layer and the zinc foil layers are combined in a physical rolling mode. The composite negative electrode is used for the zinc ion battery, so that the service life of the zinc ion battery is prolonged, and the coulombic efficiency of the zinc ion battery under the high zinc utilization rate can be improved. Button-type and soft-package zinc ion batteries assembled by using the electrolyte have excellent cycle life. The preparation process is simple and is suitable for large-scale production.

A method for forming a metallic coating from a metallization solution, wherein the metallization solution comprises at least one metal ionic precursor, at least one structuring liquid, and at least one driving liquid, wherein the at least one metal ionic precursor comprises at least one metal cation and at least one counterion, the at least one structuring liquid serves to dissolve the at least one metal ionic precursor in the metallization solution, the at least one driving liquid serves to nebulize the metallization solution; and wherein the method comprises: applying the metallization solution to a substrate, and exposing the metallization solution to a plasma under atmospheric conditions, thereby obtaining the metallic coating.

The present application relates to optical fiber surface coating treatment device technical field, especially to a kind of optical fiber metal coating spraying device, including the spraying mechanism of lower shell, shunt chamber, combustion chamber and ring spray component composition, and for driving the linear drive mechanism and rotary drive mechanism of rotary movement of spraying mechanism.The present application is by being provided with independent oxygen passage, hydrogen passage and metal powder passage in shunt chamber, and by corresponding oxygen hole, hydrogen hole and metal powder hole spray into combustion chamber, it is realized in the state that oxygen content is higher, to metal powder realizes rapid melting, improves the purity of metal molten liquid;And by the ring array side nozzle on annular jet pipe, it is realized to the overall metal coating of optical fiber surface;While improving the controllability of optical fiber surface metal coating quality and coating thickness and uniformity.

A battery pack with electromagnetic compatibility (EMC) for an electric vehicle is presented that includes a battery pack housing, at least one battery module enclosed within the battery pack housing, and an electronics assembly enclosed within the battery pack housing, in which the electronics assembly comprises a DC-DC converter and an electronics assembly casing, wherein at least one of the electronics assembly and battery pack housing includes an electromagnetic interference (EMI) shield to enable EMC. The electronics assembly includes a battery management system (BMS) circuit board and a DC-DC converter control circuit board and a DC-DC converter power electronics board. The electronics assembly is of substantially a same dimension of a battery module, in which the EMI shield comprises at least one of a metallic screen, metallic wires, a metallic tape, a metallic sheet, a metallic coating, paramagnetic materials, carbon based materials and metallic and / or carbon particle-infused composites.

The embodiment of the invention provides a self-powered microneedle patch for repairing hypertrophic scars as well as a preparation method and application of the self-powered microneedle patch. The self-powered microneedle patch comprises: a friction nano-generator for generating a current; the conductive drug-loaded microneedle patch is connected with the friction nano-generator, and the friction nano-generator is connected with the conductive drug-loaded microneedle patch; the conductive drug-loaded microneedle patch comprises a conductive microneedle patch body and a crosslinked gelatin-crosslinked hyaluronic acid microneedle bearing Sb4. The surface of the conductive micro-needle patch is provided with a metal coating, and the conductive micro-needle patch is used for mediating current generated by the friction nano-generator and applying percutaneous electrical stimulation; the cross-linked gelatin-cross-linked hyaluronic acid microneedle is coated at the tip of the conductive microneedle patch. According to the self-powered microneedle patch provided by the embodiment of the invention, myofibroblasts of hypertrophic scars are transdifferentiated into adipocytes by providing percutaneous electrochemical stimulation, inflammatory factor release is inhibited, and a tissue microenvironment is remodeled, so that the hypertrophic scars are reversed, and skin repair and tissue regeneration are realized.

The invention belongs to the field of high-thermal-conductivity composite materials, and particularly relates to a 3D printing copper-diamond composite high-thermal-conductivity material and a preparation method thereof.The 3D printing copper-diamond composite high-thermal-conductivity material comprises a copper matrix and diamond particles dispersed in the copper matrix, and the surfaces of the diamond particles are provided with metal coatings; the copper matrix is formed by copper powder with the particle size of 10-100 microns, and the volume fraction of the diamond particles in the composite material is 40%-50%; according to the method, the titanium plating layer is prepared on the surface of the diamond, the stable titanium carbide transition layer is formed through the reaction of titanium and carbon, the interface thermal resistance between the diamond and copper is remarkably reduced, the interface bonding strength is improved, and heat conduction is facilitated. The selected area green laser 3D printing technology is adopted, a green laser device shows remarkable advantages in the field of 3D printing of copper alloy, and the heat conductivity of the prepared composite material can reach and is remarkably higher than that of pure copper by optimizing the diamond volume fraction and 3D printing process parameters.

The utility model discloses a coating device for a bridge steel structural member, which relates to the technical field of metal coating, and comprises a mounting plate and a sealing box device, the upper end face of the mounting plate is bilaterally symmetrically provided with fixing supports extending outwards, the fixing supports are hinged with telescopic cylinders, and the left and right end faces of the mounting plate are provided with rotating shaft sleeves. Two sets of universal columns are arranged on the lower end face of the mounting plate in a bilateral symmetry mode, the sealing box devices are arranged in a bilateral symmetry mode and comprise sealing vertical plates and lower plates which are perpendicular to each other, the upper ends of the sealing vertical plates are hinged to the rotating shaft sleeves, the outer side faces of the sealing vertical plates are hinged to telescopic air cylinders, and sliding block devices corresponding to the universal columns are arranged on the lower plates; according to the steel part spraying device, a closed spraying space can be locally formed in the steel part during spraying, the contact degree of the steel part and paint is increased, meanwhile, the dispersion degree of the paint is reduced, the spraying effect is improved, and paint waste is reduced.

The invention provides transport vehicle laminated glass and an intelligent control system with the transport vehicle laminated glass, and belongs to the technical field of vehicles. The front windshield comprises an outer front windshield body, an inner front windshield body and a thermoplastic middle layer clamped between the outer front windshield body and the inner front windshield body, the outer front windshield body is provided with a first surface and a second surface, the inner front windshield body is provided with a third surface and a fourth surface, and the second surface and the fourth surface are oppositely arranged. An infrared high-transmittance PVB (Polyvinyl Butyral) membrane is locally spliced on the thermoplastic middle layer to form an infrared high-transmittance area of which the infrared transmittance is greater than or equal to 90%; a laser radar is arranged on the third surface of the inner front windshield, and the field angle of the laser radar is aligned with the infrared high-transmittance area so that the transmittance of infrared rays emitted by the laser radar to the front windshield can be larger than or equal to 90%. The middle cementing layer diaphragm adopts a locally-spliced infrared high-transmittance PVB diaphragm structure, so that the problem of infrared signal shielding caused by a metal coating layer is completely avoided.

The invention relates to the technical field of metal material connection, in particular to a magnesium alloy low-temperature diffusion welding method and a magnesium alloy connector, and the magnesium alloy low-temperature diffusion welding method comprises the steps that metal powder is adopted to conduct cold spraying on the surfaces of two magnesium alloys to be welded, a metal coating is formed on the surface of each magnesium alloy to be welded, and the metal powder comprises at least one of copper powder, nickel powder, titanium powder and silver powder; carrying out surface self-nanocrystallization treatment on the metal coating of each magnesium alloy to be welded; and diffusion welding is conducted on the two to-be-welded magnesium alloys subjected to surface self-nanocrystallization treatment through the spark plasma sintering technology. The method aims at solving the problem that the welding effect of the magnesium alloy is affected due to the existence of an oxidation film.