709 results about "Coated surface" patented technology

The invention discloses a passive radiation refrigeration coating and a preparation method thereof, and relates to the technical field of industrial coatings. Comprising a fluoroacrylate emulsion, hollow glass beads, nano titanium dioxide, flaky silicon dioxide aerogel powder, polytetrafluoroethylene micro powder, hydroxyl-terminated polydimethylsiloxane, a hydroxyl acrylic acid modified silane coupling agent, a super-hydrophobic modified fluorosilicone surface additive, nano cerium oxide, aluminum fluoride doped zinc oxide infrared enhancement powder and deionized water. The paint is prepared on the basis of the formula. According to the invention, a multi-scale spectrum regulation and control and surface self-cleaning system is constructed cooperatively, so that the synergistic effect of high reflection of a sunlight region and high emission of a middle infrared region is realized. The coating can maintain continuous passive refrigeration in a day and night period, the surface of the coating has self-cleaning capability and excellent ultraviolet aging resistance, and high reflectivity and high radiation emissivity can be maintained for a long time in a complex outdoor environment, so that the thermal management efficiency of buildings and equipment is remarkably improved.

The invention discloses a treatment method for helium holes of an electrostatic chuck, and belongs to the technical field of electrostatic chucks, and the treatment method comprises the following steps: S1, pretreating a gas passage opening and the surface of a substrate: cleaning the helium holes and fine cracks of the substrate, and roughening the surface of the substrate; s2, a ceramic piece is glued to the helium hole opening, wherein the ceramic piece and the side wall of the helium hole opening are tightly attached and bonded together through an adhesive; s3, filling the helium hole ceramic piece with insulating glue: filling holes, cracks and other fine interfaces; s4, grinding the insulation paste filling part to be flush with the surface of the substrate so as to keep the overall flatness; s5, performing meltallizing on the surface of the substrate by using a meltallizing process to obtain the meltallizing coating, uniformly covering the insulating glue filling layer with the meltallizing coating, and forming good combination with the substrate; and S6, grinding and polishing: after the meltallizing coating is completed, grinding or polishing the meltallizing coating to ensure that the surface of the meltallizing coating is smooth.

The invention relates to the technical field of metal wire processing, and discloses a high-performance metal wire plastic coating process for aerospace engineering, which comprises the following steps: carrying out base material type selection on a metal wire, and carrying out surface treatment of precise cleaning, etching and depth gradient activation; a Ti-Cr alloy and graphene-copper composite transition layer is deposited through a magnetron sputtering technology, and a multi-layer coating structure is formed through electrostatic spraying of a base coating, a fluidized bed dipping function layer and high velocity oxy-fuel spraying of a nano composite coating in sequence; the molybdenum-gold composite sealing layer is prepared by adopting an electric arc spraying technology, and is subjected to vacuum ultraviolet curing enhancement, high-temperature gradient annealing, gradient sintering and vacuum curing treatment; and heat radiation on the surface of the coating is enhanced through laser-induced micro-nano structure regulation and silicon nitride film sputtering. Through collaborative optimization of base material treatment, coating construction, function strengthening and quality control, the interface bonding strength, the comprehensive performance and the environmental adaptability of the spaceflight metal wire coating are remarkably improved, and the service life of the spaceflight metal wire coating is remarkably prolonged.

The metasurface array antenna housing comprises a plurality of array units of the same structure, each array unit sequentially comprises a first lightning protection layer from top to bottom, and each first lightning protection layer comprises four copper metal cylinders and a lightning protection top layer drainage metal patch; the second metasurface wave absorbing and transmitting layer comprises a first dielectric substrate, and four quasi-rectangular patches, four lumped resistors, four quasi-triangular patches and four quasi-square rings which are arranged on the upper surface of the first dielectric substrate; the third metasurface wave-transparent layer comprises a square metal patch, and a first circular ring and a second circular ring are etched on the square metal patch. Lightning is guided to the third metasurface wave-transparent layer through the first lightning protection layer, the lightning is conducted to other areas through the metal patch, damage of the lightning to the antenna housing is effectively avoided, and the antenna housing can directly replace a lightning protection strip for use; the structural size is greatly reduced, the angle stability is improved, and integration is facilitated; the copper-clad surface of the third metasurface wave-transparent layer can be used as a metal back plate of the second metasurface wave-absorbing layer, and structural multiplexing is achieved.

The invention relates to a sample preparation method for coating thickness detection, which comprises the following steps: circularly heating and cooling a base material to obtain a weakly combined base material with a base material body and a coating locally separated; and forming a cut extending along the thickness direction of the coating in a local separation area of the coating of the weak combination base material to obtain a coating section sample vertical to the surface of the base material. Due to the difference of linear cutting expansion coefficients of a base material body and a coating, alternating thermal stress is initiated at the interface of the base material body and the coating through cyclic heating and cooling processes, so that the base material and the coating are controllably and locally separated, a weakly combined base material is obtained, and a cut extending in the thickness direction is prepared in the surface of the locally separated coating. A coating section sample perpendicular to the surface of the base material can be obtained through simple mechanical separation. The method can be used for efficiently preparing a coating sample with clear section and good integrity at low cost on the premise of not depending on expensive or high-damage equipment.

The invention relates to the technical field of special functional coating materials for lost foam casting, and particularly discloses a special coating for a large machine tool casting lost foam as well as application and a use method of the special coating. According to the invention, the full-temperature-range functional composite material and the composite aggregate are used for synergistic reinforcement, and mullite is used for high-temperature reinforcement; the temperature-sensitive polymer modified graphite can realize intelligent temperature response of graphite performance; spodumene is used as a thermal expansion adaptive fluxing agent, so that medium-temperature healing and thermal expansion adjustment of a coating system are facilitated; the composite reinforced fibers are reinforced and toughened aiming at large thermal stress of thick and large parts; as an ultralow-temperature glazing agent, the boron-containing glazing agent can form an initial liquid phase at about 450 DEG C to seal the surface of the coating and purify a ventilation channel; the rare earth oxide serving as a high-temperature phase stabilizer can be dissolved in mullite crystal lattices, so that the high-temperature phase stability is improved, and ceramic nodes are refined. Through raw material design, on the premise of ensuring moderate air permeability, the ultrahigh strength and crack resistance of a coating system at extremely high temperature are improved.

The invention discloses a coating and a method for recovering precious metals in a physical vapor deposition process. The coating mainly comprises a silver coating positioned on the lower layer and an organic silicon modified layer positioned on the surface of the silver coating. Before precious metal is recycled, the coating is prepared on the surface of the position where precious metal needs to be recycled in the physical vapor deposition process, after physical vapor deposition is completed, an adhesive tape is adopted to be pasted to the surface of the coating, and then the precious metal is stripped from the surface of the coating in a mode of tearing the adhesive tape; or scraping the surface of the coating by adopting a tool, so that the noble metal is stripped from the surface of the coating, and stripped noble metal chips are collected; and finally, the adhesive tape with the precious metal or the collected precious metal scraps are heated, and the precious metal is recycled from a heating product. According to the method, efficient stripping and efficient recycling of the precious metal can be achieved, the coating has no influence on physical vapor deposition equipment and the technological process, and the method is simple in technology, high in operability, environmentally friendly, free of pollution and high in economical efficiency when the precious metal is recycled and can be applied to the recycling process of the precious metal on a large scale.

The invention discloses a super-amphiphobic flame-retardant ice-resistant coating as well as a preparation method and application of the super-amphiphobic flame-retardant ice-resistant coating with a multi-layer surface coating, and belongs to the technical field of functional materials of electrical equipment. The coating comprises micron-sized ammonium polyphosphate, a nano-sized inorganic filler, fluorinated alkyl silane and a fluorine surfactant, the super-amphiphobic, flame-retardant and ice-resistant coating is constructed through multi-scale components, and the super-amphiphobic, flame-retardant and ice-resistant coating is spontaneously assembled on the surface of a base material in the coating process to form a coating surface with a molecular nanometer, micrometer and macroscopic multi-level structure; the coating shows good super-amphiphobic characteristics, the contact angle of the structure surface after long-time placement under the room temperature condition is basically kept unchanged, the contact angle to water and oil is still larger than 150 degrees after multiple times of cyclic friction and washing, meanwhile, the coating has excellent flame retardance, ice resistance and wear resistance, the icing delay time is greatly prolonged, and the coating has the good anti-freezing effect. And no open fire is generated when the cable is in contact with an external fire source, so that the cable has important engineering application value for electric power facilities under harsh environmental conditions.

The invention discloses a material with a silver coating for low-temperature brazing of brazing filler metal, and particularly relates to the field of brazing welding, which comprises the following steps: silver amalgam paste is prepared by oscillating and mixing silver powder and mercury according to the mass ratio of 1: 9-0.5: 9.5 in a manner and method for plating silver on the surface of base metal (metal, semiconductor, ceramic or glass); when brazing is carried out, the surface of the silver plating layer of the to-be-welded piece is coated with brazing filler metal, and then heating and pressurizing are carried out in a low-temperature interval of 120-350 DEG C in a vacuum, protective atmosphere or atmospheric environment to complete connection. According to the method, the amalgam reaction and isothermal solidification principles are utilized, a tough welding spot mainly comprising a silver-based solid solution is finally formed, generation of a large number of brittle intermetallic compounds is avoided, a connector has high strength, high reliability and excellent thermal fatigue resistance, and therefore the problems that gold-tin brazing filler metal is high in cost, the brittleness of the welding spot is large, and the welding temperature is high are successfully solved.

The preparation method comprises the following steps: firstly, pretreating the surface of an aluminum plate, then uniformly mixing and stirring a skeleton structure, a cross-linked structure, a tethered structure and a lubricating liquid, then adding a catalyst, stirring for a proper time, spin-coating the pretreated aluminum plate with the mixture, and heating and curing. The content proportion of the tether structure has great influence on the anti-ice-dredging effect, the tether structure plays a role in integration of a loose network and slow consumption, the hole size in a coating cross-linked network is adjusted, the elastic modulus is adjusted, and the mechanical performance of the coating is changed; one end of the coating is connected with a cross-linked network, and the other end of the coating is freely relaxed, so that the anti-icing performance of the surface is improved. Meanwhile, due to the existence of the lubricant in the cross-linked structure, the coating has solid-liquid synergistic effect anti-icing performance, so that the coating prepared by the method has good mechanical performance and durable anti-icing performance.

The invention relates to a high-performance hafnium-based ultrahigh-temperature ceramic-based composite material and a preparation method thereof. The method comprises the following steps: depositing pyrolytic carbon on the carbon fiber surface of a carbon fiber preform through a CVD (Chemical Vapor Deposition) method; preparing a hafnium oxide interface layer on the surface of the pyrolytic carbon through an atomic layer deposition method, and performing ultra-fast annealing treatment to form a pyrolytic carbon-hafnium oxide composite interface layer; carrying out a reaction with a matrix containing a pyrolytic carbon-hafnium oxide composite interface layer through an impregnation pyrolysis method; a hafnium carbide coating is prepared on the surface of the composite material matrix through a CVD method; and preparing a hafnium oxide coating on the surface of the hafnium carbide coating through an atomic layer deposition method, and carrying out ultra-fast annealing treatment to prepare the high-performance hafnium-based ultra-high-temperature ceramic-based composite material. According to the preparation method, the pyrolytic carbon-hafnium oxide composite interface layer is prepared by adopting an atomic layer deposition process and depending on ultra-fast annealing treatment, and meanwhile, the hafnium carbide-hafnium oxide composite coating is prepared, so that the mechanical property of the composite material in a high-temperature aerobic environment is remarkably improved.

The invention discloses a gradient coating preparation method combined with a gas phase aluminizing process, and relates to the technical field of thermal spraying, and the gradient coating preparation method comprises the following technological processes: S1, carrying out sand blasting treatment on a common gas turbine hot part material GH3536, and then carrying out transferred arc activation treatment on the sand-blasted surface by using vacuum plasma equipment; s2, Ni < 23 > Co < 20 > Cr < 12 > Al < 4 > Ta < 0.6 > Y powder is sprayed; s3, spraying of Ni < 23 > Co < 20 > Cr < 10 > Al < 0.6 > Y powder is conducted; s4, spraying of Ni20Cr10Al powder is carried out; s5, Ni5Al powder is sprayed; s6, a beta-NiAl layer containing an Al2O3 protective film is prepared on the surface of the coating and the surface of the part through the gas phase aluminizing technology; gradient coatings with different components are prepared through atmospheric plasma spraying, and finally a beta-NiAl layer containing an Al2O3 protective film is formed on the surfaces of the gradient coatings through gas phase aluminizing.

Valves with a coated surface are described. A surface of the valve can include a surface coating. For example, the surface coating can include many different materials and may include a metal or metal alloy such as, for example, a molybdenum alloy or a nickel alloy or a nickel molybdenum alloy. Systems and devices including the valves are also described.

The invention discloses an intelligent coating control method and device capable of sensing the state of a coating surface in real time, and relates to the technical field related to intelligent coating control. The method comprises the steps that a multi-source sensor is started to execute data collection, and a coating state multi-source data set is established; after timestamp alignment and drift compensation are carried out, a coating state time sequence data set is established; inputting to a Koopman prediction model under physical constraint, and establishing a coating state prediction sequence; carrying out residual analysis and generating a coating state uncertainty set containing a confidence interval by utilizing Gaussian process regression; inputting into a dual model prediction controller, and executing dual-target optimization analysis; intelligent coating control is performed using the control input trajectory. The technical problems that in the prior art, due to the fact that dynamic changes in the coating process are difficult to sense and predict in real time, the coating control precision is low, and the stability and the coating quality are poor are solved, and the technical effects that high-precision coating control is achieved, and the coating control stability and the coating quality are improved are achieved.

The invention firstly provides a structure of environment-friendly bottomless paper type thermo-sensitive paper. The structure comprises a base material, and a thermo-sensitive coating and a silicone oil layer which are sequentially laminated on one surface of the base material, the thermosensitive coating comprises a color developing layer, a pre-coating layer and a bottom coating layer which are laminated in sequence, and the bottom coating layer is laminated on one surface of the base material; secondly, a coating system is provided, and a color developing agent comprises 4, 4 '-sulfonyl diphenol; the invention also provides a preparation method which is used for preparing the thermo-sensitive paper by adopting the structure and the coating system, and comprises the following steps: coating the color developing layer on the surface of the pre-coating layer by using curtain coating; a novel structure is designed, a basis is provided for the self-curling release performance of the thermo-sensitive paper, a coating system uses 4, 4 '-sulfonyldiphenol, so that the color saturation, the light resistance and the stability of the thermo-sensitive paper can be improved, the thermo-sensitive paper does not react with silicone oil, the release performance is improved, a curtain coating method is adopted based on the structure and the coating system, and the self-curling release performance of the thermo-sensitive paper is improved. And the coating uniformity, color development and other properties of the thermo-sensitive paper are effectively improved, and the environment-friendly thermo-sensitive paper which is fast in reaction, bright in color and high in definition during printing is integrally formed.

The invention discloses a preparation method and application of a liquid-phase-coated surface-passivated silicon-carbon negative electrode material based on a fluidized bed product, and belongs to the field of battery negative electrode materials.The preparation method of a silicon-carbon negative electrode comprises the steps that a, the silicon-carbon negative electrode material prepared through a fluidized bed is placed in a fluidized bed reactor; fluidizing gas is introduced, so that the silicon-carbon negative electrode material is in a fluidized state; b) atomizing a coating agent solution containing a carbon precursor and a solvent, and spraying the atomized coating agent solution into the fluidized bed reactor to uniformly coat the surface of the silicon-carbon negative electrode material with the coating agent solution; and c) carrying out heat treatment on the coated silicon-carbon negative electrode material, and converting the carbon precursor into a carbonaceous passivation layer. The method has the advantages of low cost, high efficiency and high quality.

The invention belongs to the technical field of photocuring coatings, and discloses a high-light-transmittance skin-touch coating and a preparation method thereof.The preparation method comprises the steps that a photoinitiator, a diluent, a cross-linking agent and a prepolymer are mixed, and a photocuring coating is obtained; the photoinitiator is a macromolecular photoinitiator with a surface anti-oxidation polymerization inhibition effect, or is a macromolecular photoinitiator and a micromolecular photoinitiator with a surface anti-oxidation polymerization inhibition effect; the photocureable coating is coated on a base material to obtain a wet film, and the wet film is exposed under ultraviolet light to obtain the high-light-transmittance skin-touch coating. The preparation method effectively solves the problems that the surface of a photocuring system is sticky in air and the internal stress of the curing system is released, the skin-touch coating is prepared through one-time exposure, the surface is not sticky, hydrolysis resistance is achieved, the light transmittance of the coating is high, and the skin-touch coating can be used for product outer packaging.

The invention relates to a preparation method of a high-hardness composite coating on a titanium alloy surface, which comprises the following steps: pretreating a titanium alloy base material to remove a surface oxide layer to obtain the treated titanium alloy base material; prepared high-entropy alloy powder is dried and evenly laid on the surface of the treated titanium alloy base material, and the titanium alloy base material with the powder laid is obtained; performing laser cladding treatment on the titanium alloy base material subjected to powder laying in a protective gas atmosphere to obtain a high-entropy alloy strengthened coating; the particle size of the powder is controlled to be 65-90 microns. The Al powder, the Co powder, the Ni powder, the Ti powder and the B powder with the purity higher than 99.5 wt% are selected as raw materials, the high-entropy alloy powder and the high-strength titanium alloy matrix are molten on the surface of the high-strength titanium alloy through a laser high-energy heat source, the metallurgical bonding effect is achieved, high-entropy phase strengthening is achieved, grains can be fine, and the hardness and abrasion resistance of a surface coating can be improved. The surface hardness of the coating prepared by laser cladding of the high-entropy alloy powder on the surface of the titanium alloy is not lower than 677 HV, and the wear resistance is not lower than 1.128 hmm.

A multispectral imaging film coating uniformity on-line detection system comprises the following steps: carrying out full-spectrum response curve test on a standard coating sample, screening basic candidate wavelengths corresponding to different coating materials, carrying out industrial scene test on the basic candidate wavelengths, and determining the uniformity of the coating according to the basic candidate wavelengths. The comprehensive adaptive value of the basic candidate wavelength of each coating material under different thicknesses is obtained; acquiring a sensitive wave band combination of a to-be-detected coating of a current production line based on the comprehensive adaptive value, acquiring a spectral image of each sensitive wave band on the surface of the to-be-detected coating, performing adaptive fitting baseline correction preprocessing on the spectral image of each sensitive wave band, performing spectral feature mining and correlation screening on the spectral image, and acquiring a low-dimensional feature vector; and performing thickness inversion based on the low-dimensional feature vector, generating a coating thickness two-dimensional distribution heat map, performing uniformity judgment on the coating thickness two-dimensional distribution heat map, and outputting a uniformity judgment result. According to the invention, the accuracy and pertinence of coating uniformity detection are obviously improved.

The invention discloses a preparation method of a graphene composite coating with multifunctional characteristics, which comprises the following steps: processing a substrate, coating a carbon source polymer solution on the surface of a substrate material to form a polymer liquid film, and treating a polymer to form a polymer film; laser induction: carbonizing the polymer film by using laser to form a laser-induced graphene (LIG) coating; functional particles are added, nanoparticles are doped on the surface of the LIG coating in a coating mode, and a composite structure is formed; integrating the multifunctional coating, and forming the graphene-based multifunctional composite coating through post-treatment.

The utility model relates to a coating device for a corrosion-resistant insulating coating surface, which belongs to the technical field of corrosion-resistant insulating coating and comprises a processing bin, two storage boxes are fixed at the rear end of the processing bin, two spraying pipes are arranged in the processing bin, a plurality of spraying heads are fixed and communicated with opposite walls of the two spraying pipes, and the spraying heads are communicated with the processing bin. A frame plate is fixed to the rear wall of the processing bin, and an adjusting mechanism used for adjusting the distance between the two spraying pipes is arranged at the rear ends of the two spraying pipes. The adjusting mechanism comprises sleeve blocks fixed to the outer surfaces of the two spraying pipes. According to the coating device for the surface of the corrosion-resistant insulating coating, the distance between the two spraying pipes can be shortened, so that the height of the positions where the two spraying pipes are located can be adjusted according to the thickness of a workpiece, adjustment can be conducted according to the thickness of the workpiece, and the problems that due to the fact that the distance is too short, a paint film becomes thick, sagging is possibly caused, the spraying distance is too long, and the spraying efficiency is high are solved. The paint film is thinned, the surface is rough, and the paint loss is large.

The present application relates to the technical field of special functional coating materials for lost foam casting, and specifically discloses a special coating for large machine tool castings, and application and use method thereof. The present application synergistically strengthens full-temperature-range functional composite materials and composite aggregates, and uses mullite for high-temperature strengthening. Temperature-sensitive polymer modified graphite can realize intelligent temperature response of graphite performance. Lithium feldspar as a thermal expansion adaptive fluxing agent is more conducive to the medium-temperature healing and thermal expansion adjustment of the coating system. Composite reinforcing fibers are used to enhance and toughen the thick and large workpiece with large thermal stress. Boron-containing glazing agent as an ultralow-temperature glazing agent can form an initial liquid phase at about 450 DEG C, seal the surface of the coating, and purify the air passage. Rare earth oxides as high-temperature phase stabilizers can be solid-solved in the mullite lattice, improve the high-temperature phase stability, and refine the ceramic nodes. Through raw material design, the coating system has improved ultrahigh strength and crack resistance at extreme high temperatures under the premise of ensuring moderate air permeability.

Disclosed are a negative electrode material for a secondary battery and a preparation method thereof, the negative electrode material enhancing the initial discharge capacity, initial efficiency and life characteristics of the secondary battery. The negative electrode material for a secondary battery according to the present disclosure comprises an active material having a carbon-coated surface, a conductive material, and a binder. The active material comprises a magnesium-doped composite. The magnesium-doped composite comprises silicon oxide (SiOx, 0.5<x≤2) nanoparticles, silicon (Si) nanoparticles, and magnesium oxide nanoparticles. The diameter of the magnesium oxide nanoparticles may be 30-150 nm.

The application relates to the technical field of materials, and discloses a kind of corrosion-resistant coated steel pipes and preparation method thereof, the coated steel pipe includes steel pipe body and is coated in functional coating, functional coating is formed by coating functional coating on the surface of steel pipe body, and is cured, functional coating is formed by mixing with epoxy resin as film-forming material and glass flake modified material as additive, glass flake modified material is modified by macromolecular material with benzene sulfone-fluorosilane alternate connection structure on the surface of glass flake, due to the benzene sulfone structure in the structure of macromolecular material can produce pi-pi conjugation between epoxy resin matrix, the compatibility of glass flake and epoxy resin is improved, the strength and corrosion resistance of coating are enhanced, macromolecular material can form highly hydrophobic layer on the surface of coating, construct the synergistic effect of "interface strengthening-network crosslinking-corrosion prevention", greatly enhance the corrosion resistance of coating.

The application provides a heat insulation performance testing device for thermal barrier coating, which comprises a hollow cavity with a through mold loading groove, a cylindrical graphite mold placed in the mold loading groove, and a temperature rising device and a first temperature measuring device which are opposite to each other and face one end surface of the cylindrical graphite mold; wherein one end surface of the cylindrical graphite mold is sprayed with a thermal barrier coating to be measured, and the side surface of the cylindrical graphite mold is sprayed with a heat insulation coating. The heat insulation condition of the heat insulation performance testing device for thermal barrier coating is set by spraying the heat insulation coating on the side surface of the graphite mold, and the heat insulation condition is set ingeniously so that the device can meet the Fourier heat transfer law under one-dimensional condition as much as possible, unnecessary heat escape is avoided, the heat flow on the coating surface completely realizes conduction to the back of the substrate, and thus, the measurement error caused by neglecting is avoided, and the result is accurate and reliable.

The present application provides a carbon-coated current collector containing a lithium replenishment coating layer, a method for manufacturing the same, and a lithium battery, which belongs to the technical field of lithium battery materials. [Solution] A method for manufacturing a carbon-coated current collector containing a lithium-replenished coating layer includes chemically etching a current collector substrate to embed a lithium-replenished material therein to form a lithium-replenished coating layer, and then applying a conductive carbon coating layer slurry to the surface of the lithium-replenished coating layer to form a conductive carbon coating layer. By chemically etching a current collector substrate to attach a lithium-replenished coating layer and then attaching a conductive carbon coating layer, the surface tension of the current collector can be improved, which is advantageous for the application and attachment of an electrode active material. At the same time, the introduction of the conductive carbon coating layer reduces the contact resistance between the electrode active material and the current collector, improving the usage consistency of lithium battery packs and significantly reducing the cost of lithium battery packs.

The invention relates to a method for inspecting a coated surface for a surface defect. The method comprises: using (102) a device (200, 300, 400, 700, 800, 900) for covering the coated surface to be inspected, the device being configured to create an enclosed space to isolate the surface coating to be inspected from ambient illumination in order to provide predefined photographic acquisition conditions within the enclosed space; acquiring (104) a photo of the coated surface being within the enclosed space; and inspecting (106) the photo for the presence of the surface defect.

The invention relates to a blue light excited quantum dot lens and a preparation method thereof, the blue light excited quantum dot lens comprises a lens body and a hydrophobic coating, the hydrophobic coating is formed by coating the surface of the lens body with a hydrophobic coating, and the hydrophobic coating comprises composite resin, a curing agent, fluorine-containing resin and modified silicon dioxide. The surface of the lens body is coated with the hydrophobic coating containing the composite resin, the curing agent, the fluorine-containing resin and the modified silicon dioxide, the hydrophobic coating is formed, the fluorine-containing resin increases the contact angle on the surface of the hydrophobic coating, the fluorine-containing resin and the modified silicon dioxide act synergistically, and the water resistance of the lens is improved.

The invention relates to an optical fiber drawing method integrated with a coloring function and a production system, and relates to the technical field of optical fiber manufacturing, and the method comprises the following steps: melting and drawing an optical fiber preform to form a bare fiber; the bare fiber is cooled; coating the cooled bare fiber twice to form an inner coating and an outer coating; performing primary UV curing on the inner coating and the outer coating to enable the outer coating to reach a semi-cured state; coating coloring ink on the surface of the outer coating in a semi-cured state; performing secondary UV curing on the coloring ink, so that the coloring ink is cured, and the inner coating and the outer coating are finally cured; and the cured optical fiber is detected and taken up. The coloring procedure is integrated into the wire drawing process, integrated continuous production is achieved, and optical fiber microbend loss caused by multiple times of winding and unwinding is avoided; by means of molecular activity in a semi-cured state, coloring ink permeates to form an interpenetrating network structure, and adhesive force is improved.

This invention discloses a wear-resistant coating for Peak rackets, comprising the following main components by weight: 40-60 parts epoxy resin, 2-4 parts curing agent, 1-3 parts accelerator, 10-20 parts anti-wear additive, and 30-50 parts mixed powder. By selecting a composite of metal powder and silicon carbide powder as fillers and adding them to the resin system, the coating formed on the surface of the Peak racket creates microscopic protrusions, increasing the coefficient of friction. This significantly increases the controllability of the ball during impact. Furthermore, the silicon carbide forms a sufficiently hard and wear-resistant skeleton within the resin, resisting external friction and preventing performance degradation. Simultaneously, the metal powder distributed between the silicon carbide powders, with their different particle shapes, alleviates stress concentration caused by the hard silicon carbide. When the coating is impacted, the metal powder absorbs some deformation energy, providing cushioning for the racket and further increasing the controllability of the ball during impact.