2761results about "Superimposed coating process" patented technology

The invention relates to an optical fiber hydrogen sensor based on a silver film-nanowire hole array structure and a preparation method thereof in the field of photochemical sensors. The optical fiber hydrogen sensor comprises a multimode optical fiber, and a sensing area is formed on the multimode optical fiber; the sensing area is formed by stripping a coating layer with a preset length from the multimode optical fiber, thinning the optical fiber in the area, plating a silver film on the surface of the thinned optical fiber, and adsorbing a nanowire hole array structure which is sequentially and vertically arranged on the surface of the silver film in a liquid level self-assembly manner; the nanowire hole array is of a metal-medium-metal (MIM) structure, a gold-palladium nanowire array is arranged at the bottom, an intermediate medium layer is made of aluminum oxide, and a silver film with a hole array in any shape is arranged at the top. When light is transmitted to a sensing area from a fiber core of the multimode optical fiber, the light and a metal silver film can excite a surface plasmon resonance (SPR) effect, meanwhile, an MIM structure formed by a gold-palladium nanowire, an aluminum oxide dielectric layer and a porous silver film serves as an optical coupling antenna through a local surface plasmon resonance (LSPR) effect at the edge of a top hole, and the optical coupling antenna is used for transmitting the light to the sensing area. Light energy is efficiently converged and excited in an extremely bound gap plasmon (Gap Plasmon) in an aluminum oxide dielectric layer, so that far-unconventional electromagnetic field enhancement is generated in a sensing core area, and the sensitivity of the sensor is greatly improved.

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.

A cutting tool comprising a base material and a coating disposed on the base material, wherein the coating comprises a hard particle layer; the hard particle layer is formed from a plurality of hard particles including titanium, silicon, carbon, and nitrogen; in the hard particles, a concentration of the silicon periodically changes along a first direction set in the hard particles; and an orientation of the hard particle layer is a (311) orientation.

The invention provides a thermal barrier coating with an interface three-dimensional bionic structure and a preparation method and application of the thermal barrier coating, and belongs to the technical field of thermal barrier coatings. By means of 3D printing, preparation of a complex, special and arrangement-distribution-controllable three-dimensional texture component with a complex geometrical shape and an internal structure can be achieved, and therefore the coating interface residual stress, the contact area and the pinning effect are improved; 3D printing can avoid internal oxidation of the bonding layer, and meanwhile it is ensured that the structure of the multi-level interface is uniform and stable; and then the ceramic layer is prepared by combining the spraying technology, preparation of the interface three-dimensional bionic structure thermal barrier coating is achieved, interface mechanical engagement of the bonding layer and the ceramic layer can be increased through the structure, an interlocking mechanism is achieved, the coating interface structure and residual stress are improved, and therefore the service life of the coating is greatly prolonged, and the bonding strength of the coating is greatly improved.

The invention relates to the technical field of titanium-steel composite plates, and particularly discloses a high-thermal-conductivity titanium-steel cold-rolled composite plate and a preparation method thereof.The preparation method comprises the steps that plasma etching treatment is conducted on a titanium plate, a TiB2-graphene heat conduction layer is arranged on the etched surface in a laser cladding mode, and an aluminum oxide whisker layer is deposited on a stainless steel plate through plasma electrolysis; the preparation method comprises the following steps: spraying nano-copper slurry on the surface of aluminum oxide whiskers, curing, carrying out composite rolling on a modified titanium plate and a stainless steel plate, and carrying out annealing and tempering treatment after rolling to obtain the high-thermal-conductivity titanium steel cold-rolled composite plate.

The invention provides a preparation method of a bipolar current collector based on a selective double-sided modified masking film. The preparation method comprises the following steps: depositing a Ni-Cr alloy layer on a single side surface of an aluminum substrate; one side of the masking film is etched to form a roughened surface, and the other side of the masking film is hydrophobic to form a hydrophobic surface; the roughened surface of the masking film and the surface, without the Ni-Cr alloy layer, of the aluminum matrix are pressed, and the edge is coated with curing glue; and placing the pressed and glued sample in an electroplating solution to electroplate a copper layer, finally cutting off an edge glue sealing area, and stripping the masking film. According to the preparation method, the masking film used for protecting the back surface of the aluminum substrate is subjected to double-sided differential treatment, the edge sealing technology is matched, and the Ni-Cr alloy is adopted for bottoming, so that the adhesive force between the copper plating layer and the aluminum substrate is improved, the risk of causing corrosion of a primary battery is reduced, the bipolar current collector which is firmly combined and has a pure interface can be prepared, and the service life of the bipolar current collector is prolonged. And a feasible solution is provided for realizing light-weight and high-performance current collectors for electronic devices such as lithium batteries and the like.

The invention discloses an anti-deformation industrial furnace water beam structure made of a gradient composite material and a preparation method. The water beam structure sequentially comprises a high-temperature-resistant gradient layer, a thermal stress buffer layer and a heat conduction base body layer from outside to inside. Wherein the high-temperature-resistant gradient layer is composed of a ceramic and / or metal ceramic material, and the components of the high-temperature-resistant gradient layer are in continuous or stepped transition from the outer surface to the inside in the thickness direction to form a metal material for resisting high-temperature oxidation and hot corrosion; the thermal stress buffer layer is composed of a metal-based composite material, the coefficient of thermal expansion (CTE) of the thermal stress buffer layer is between that of the high-temperature-resistant gradient layer and that of the heat-conducting matrix layer, and the thermal stress buffer layer is used for relieving And the heat-conducting matrix layer is made of a high-heat-conductivity metal material and is used for rapidly conducting out heat. Through collaborative optimization of materials and structures, the problems that a traditional water beam is concentrated in thermal stress and poor in thermal shock resistance are solved, and the water beam is suitable for long-term stable operation of a high-temperature industrial furnace.

The invention provides a gradient self-repairing sealing coating and a preparation method thereof, and relates to a high-temperature protection material. The gradient self-repairing sealing coating comprises a bonding layer, a gradient middle layer, a transition layer and an abradable surface layer which are sequentially arranged from a base body to the surface. A bonding layer in the gradient self-repairing sealing coating contains silicate, so that the bonding strength and the heat-resistant stability of a matrix are improved; rare earth silicate and Ir elements are introduced into the gradient intermediate layer, so that high-temperature corrosion resistance is enhanced, and thermal stress is relieved; the transition layer contains zirconium oxide and graphene and has the functions of thermal isolation and stress regulation; the abradable surface layer is formed by combining rare earth silicate and graphite, low friction and preferential abrasion are achieved, and effective sacrifice protection is provided. The overall structure can have multiple properties of heat, corrosion resistance and abrasion resistance, and is suitable for the surface protection requirement under the complex hot end working condition.

The invention discloses an AlCrN / TiSiN / AlCrTiSiON pre-oxidation multilayer composite coating and a preparation process thereof, belonging to the technical field of coatings. The bottom layer of the composite coating is an AlCrN transition layer, and an AlCrN / TiSiN nano multilayer film and a TiSiN high-hardness layer are sequentially stacked for 1-4 times on the transition layer; The outermost layer is a compact AlCrTiSiON pre-oxidation coating, wherein the AlCrTiSiON pre-oxidation coating has excellent wear resistance and heat resistance. The coating is prepared by adopting an arc ion plating technology. The invention prepares the pre-oxidation coating with high hardness, high wear resistance and high heat resistance through process design and optimization of coating structure and pre-oxidation layer process parameters.

The invention belongs to the technical field of surface engineering protective coatings, and discloses a nitrogen heterocyclic compound modified corrosion-resistant high-entropy alloy coating as well as a preparation method and application thereof. The preparation method comprises the following steps that firstly, a magnetron sputtering technology is adopted, a CoCrFeMnNi target serves as a cathode target material, and a corrosion-resistant high-entropy alloy coating is obtained through deposition on the surface of a base body; and then, in a three-electrode system, the corrosion-resistant high-entropy alloy coating is placed in an electrolyte containing a nitrogen heterocyclic onium salt compound to be subjected to electro-deposition, and the nitrogen heterocyclic compound modified corrosion-resistant high-entropy alloy coating is prepared. The corrosion-resistant inorganic-organic hybrid coating prepared by the invention has excellent corrosion resistance, can keep high stability and durability in a complex corrosion environment, and has relatively high corrosion potential and relatively low corrosion current density. The coating can remarkably prolong the service life of a structural base material, is suitable for various harsh working conditions, and provides an efficient and reliable protection solution for industrial application.

The invention discloses a high-potential-corrosion-resistant composite coating as well as a preparation method and application thereof. The high-potential-corrosion-resistant composite coating comprises a metal transition layer, a graphite-like amorphous carbon layer and a SnO2 hole sealing layer which are sequentially formed on the surface of the metal bipolar plate serving as a substrate, wherein the SnO2 hole sealing layer is prepared in an atomic layer deposition mode. According to the high-potential-corrosion-resistant composite coating provided by the invention, the SnO2 layer is deposited on the surface of the amorphous carbon coating, so that the effect of closing amorphous carbon defects is achieved, and the high-potential-corrosion-resistant composite coating has excellent corrosion-resistant protection performance under 1.6 V high-potential corrosion.

Disclosed are a corrosion-resistant film for a magnesium alloy wheel and a preparation method thereof, The corrosion-resistant film for a magnesium alloy wheel includes: a micro-arc oxidation (MAO) coating, a chemically blocked coating, a physical vapor deposition (PVD) high-density inorganic hybrid coating, a high oxidation-resistant powder coating which are sequentially stacked from inside to outside by using the magnesium alloy wheel as a substrate. In the present disclosure, based on a micro-arc oxidation technology, zirconium, titanium, an iron salt, nano silicon, polymer resin are added into an electrolytic solution, and under a constant voltage mode of an adjustable power supply, the MAO coating is generated on the surface of the magnesium alloy wheel, followed by chemical blocking; the PVD high-density inorganic hybrid coating is obtained by coating on the chemically blocked coating, physical blocking is performed; the high oxidation-resistant powder coating is spray-coated on the PVD high-density inorganic hybrid coating.

The invention discloses a preparation method of a rare earth element doped high-corrosion-resistance self-healing PEO / LDHs composite coating on the surface of a magnesium alloy. The preparation method comprises the following specific steps: firstly, putting a pretreated base material into a micro-arc oxidation electrolyte to obtain a micro-arc oxidation (PEO) layer; then the PEO layer is placed in a rare earth salt solution for a hydrothermal reaction, then ultrasonic treatment is carried out in absolute ethyl alcohol to prepare a rare earth doped PEO layer, and finally the rare earth doped PEO layer is immersed in an LDHs growth solution for hydrothermal treatment to obtain the composite coating. According to the method, the problems that single rare earth modified PEO is poor in binding force and long in cycle period can be effectively solved, the PEO / LDHs composite coating prepared through the hydrothermal method has high corrosion resistance, rare earth cations with corrosion inhibition performance can be released when the coating is exposed to a corrosion environment, LDH nanosheet reconstruction covers the defects in the coating, and the corrosion resistance of the coating is improved. The magnesium alloy has an obvious self-repairing effect, and the service life of the magnesium alloy can be remarkably prolonged.

The invention belongs to the technical field of optical glass, and discloses an optical glass structure with a high-hardness scratch-resistant coating, which comprises the following structures: a chemically strengthened glass substrate; the refractive index gradient transition layer is deposited on the surface of the substrate; and the diamond-like carbon-based hard coating covers the surface of the transition layer. The defect is thoroughly overcome through a gradient strengthening system, the diamond-like carbon coating resists invasion of external abrasion particles through a crystal bonding network close to absolute hardness, so that the surface microhardness breaks through the upper limit of a brittle material, the gradient transition layer constructs an elastic buffer strip below the coating, impact stress is dissipated through the porous nano laminated layer, and the hardness of the coating is improved. The cooperation of the two ensures that no visible scratch is generated on the glass surface even if the glass surface is exposed to a high-wear environment for a long time, thereby fundamentally blocking linkage failures such as light path scattering, imaging blurring and dispersion imbalance caused by surface damage, and ensuring that the light transmittance of a precise optical system in the whole life cycle is stabilized at a theoretical extreme value.

A gas turbine engine component, comprises a densified three-dimensional woven ceramic matrix composite comprising the shape of the gas turbine engine component, the densified three-dimensional woven ceramic matrix composite further comprises a three-dimensional woven structure comprising a densified ceramic matrix disposed on, within and throughout a three-dimensional weave comprising at least one inorganic fiber comprising at least one multilayer coating material structure disposed thereupon, wherein the at least one multilayer coating material structure comprises at least one first interface coating material layer comprising a boron nitride; at least one coating material layer comprising a silicon nitride; at least one second interface coating material layer comprising the boron nitride; and at least one third interface coating material layer comprising a Si3N4-BN multilayer coating having one or more alternating layers comprising at least one layer of silicon nitride at a first thickness; and at least one layer of boron nitride at a second thickness.

The invention belongs to the technical field of electronic packaging carrier plates, and discloses an ultrathin diamond carrier plate and a preparation method and application thereof.The preparation method comprises the steps that a heterogeneous substrate is selected, cleaned and subjected to seed crystal, and then a sacrificial layer is introduced; growing a compact and continuous ultrathin diamond film on the substrate pretreated in the step 1 through chemical vapor deposition; sequentially carrying out surface cleaning, activation and modification on the diamond film; constructing a metal layer structure required by conductive wiring and a heat dissipation substrate on the surface of the diamond carrier plate; the ultrathin diamond film deposited on the heterogeneous substrate is separated from the substrate, and a self-supporting diamond carrier plate is obtained; the heat-conducting property of the packaging substrate is remarkably improved, and an ultrathin structure with controllable thickness can be prepared; a reliable diamond film heterogeneous substrate growth and stripping process is provided, so that an independent support plate can be conveniently obtained from a growth substrate by the thin film; the metallization adhesive force of the surface of the carrier plate is enhanced, high-density circuit patterning on the surface of the substrate is supported, and the packaging reliability is improved.

A razor blade is proposed. The razor blade may include a blade substrate having a blade edge formed therein, and a coating layer formed on the blade substrate. The coating layer may contain a matrix-forming atom, a first atom, and a second atom. The coating layer may contain a first coating region and a second coating region located at different depths in the thickness direction. The second coating region may have a larger number of nanocrystal regions than the first coating region.

A galvannealed steel sheet includes: a cold-rolled steel sheet having a chemical composition containing Si in an amount of 0.1 mass % or more and 3.0 mass % or less; and a galvannealed layer formed on one or both surfaces of the cold-rolled steel sheet. An Fe-based electroplating layer is absent between the galvannealed layer and the cold-rolled steel sheet. In an emission intensity profile, a value of (ISi,Fe) / (ISi,bulk) is 0.90 or less, where (ISi,Fe) denotes an average Si intensity in a range from an interface between the galvannealed layer and the cold-rolled steel sheet to +0.5 μm towards the cold-rolled steel sheet, and (ISi,bulk) denotes an average Si intensity in the cold-rolled steel sheet. An average value of C concentration in a range of 10 μm to 20 μm in a thickness direction from the interface between the galvannealed layer and the cold-rolled steel sheet is 0.10 mass % or less.

The present invention provides a graphene-containing laminate comprising. in order: a substrate: a graphene layer structure: a first metal oxide layer formed of a first metal oxide, wherein the first metal oxide is a transition metal oxide: and a second metal oxide layer formed of a second metal oxide: wherein the first metal oxide layer has a thickness of from 0.1 nm to 5 nm; and wherein the first metal oxide layer has a work function of 5 eV or more.

The invention provides a gradient nano composite high-entropy alloy coating system with a self-monitoring function and a preparation method, and relates to the technical field of material surface engineering.The system comprises a functional gradient coating module used for achieving gradient dispersion distribution of nano ceramic particles on the curved surface of a shield hob so as to form a gradient nano composite high-entropy alloy coating; the fiber bragg grating sensing module is used for collecting strain data of the shield hob through a fiber bragg grating sensor integrated on the shield hob; the surface thermal image monitoring module is used for collecting temperature data and image data of the surface of the shield hob through an infrared thermal imager; and the self-adaptive repairing module is used for determining repairing parameters of the shield hob and generating a repairing instruction, so that self-adaptive repairing is carried out on the shield hob through preset repairing equipment according to the repairing instruction. According to the invention, the sensor network is successfully integrated in the gradient coating, and integrated fusion of structural health monitoring and protection functions is realized.

The present invention relates to a method for obtaining a multi-layer lubricant coating by magnetron sputtering, wherein the deposition of each layer of steps b) and c) is performed using the High-Power Impulse Magnetron Sputtering (HIPIMS) technique. Additionally, the present invention relates to a multi-layer lubricant coating formed on a substrate obtainable by said method. Finally, the present invention is directed to the use of the multi-layer lubricant coating obtainable by the method of the present invention in automotive, aeronautical, space, metal-mechanic and cryogenic sectors.

The invention relates to the technical field of coating production, in particular to a method for improving the corrosion resistance of a coating through a PVD and ALD composite preparation technology, according to the method, the advantages of PVD and ALD preparation technologies are combined to deposit the coating, ALD intercalation layers are deposited at different positions of the coating prepared through PVD, and therefore the defects generated in the PVD coating deposition process are overcome. And analyzing the section and phase of the deposited coating by utilizing characterization equipment, and detecting electrochemical and corrosive wear properties in a 3.5 wt.% NaCl solution. The PVD coating is subjected to intermediate or surface treatment by adopting an ALD preparation technology, so that the electrochemical performance of the coating is effectively improved.

The invention provides a composite nickel seed layer and a preparation method thereof, a solar cell and a photovoltaic module, and relates to the technical field of solar cells. The composite nickel seed layer comprises a nickel-based alloy layer and a nickel main body layer; wherein the nickel-based alloy layer is a nickel-phosphorus alloy layer or a nickel-boron alloy layer; and a nano nickel crystal nucleus is coated in the nickel-based alloy layer. The composite seed layer structure is used for replacing a seed layer of a single material or structure, and the problems that the resistivity of a nickel seed layer main body material is high, the thickness of a nickel plating layer is not uniform, and the electrical performance and the yield of a battery are poor are solved.

A plated steel material including a plated layer and a base steel material. In a cross section perpendicular to a surface of the plated steel material, a length L of a boundary line between the plated layer and the base steel material satisfies (L−L0) / L0×100≥2.0 (%), wherein L0 is a linear distance between ends of the boundary line in an observation region, and L is a length of the boundary line between the ends. The plated layer includes a first region where an Fe concentration is less than 5.0 mass %, a second region where an Fe concentration is 5.0 mass % or more and less than 30.0 mass %, and a third region where an Fe concentration is 30.0 mass % or more and 80.0 mass % or less, the first region including an Al-containing phase at an area fraction of 5% or more.

A plated steel material including a plated layer and a base steel material. In a cross section perpendicular to a surface of the plated steel material, a length L of a boundary line between the plated layer and the base steel material satisfies (L-L0) / L0 ×100≥2.0 (%), wherein L0 is a linear distance between ends of the boundary line in an observation region, and L is a length of the boundary line between the ends. The plated layer includes a first region where an Fe concentration is less than 5.0 mass %, a second region where an Fe concentration is 5.0 mass % or more and less than 30.0 mass %, and a third region where an Fe concentration is 30.0 mass % or more and 80.0 mass % or less, the first region including an Al-containing phase at an area fraction of 0% and less than 5%.

An alloy wheel is formed having a three dimensional configuration defining a face and recessed surfaces. The face of the wheel is machined providing a smooth surface at the face and defining an edge between the smooth surface of the face and the recessed surfaces. A nozzle element for projecting a plasma jet toward the wheel is provided. The plasma jet is projected toward the smooth surface of the face, the edge, and toward at least a portion of the recessed surfaces forming an alloy oxide at least on the face and the edge disposed between the face and the recessed surfaces. A first polymeric coating is applied over the face, the recessed surfaces and the edge disposed between the face and the recessed surfaces.

The invention discloses a preparation method of a copper-zirconium alloy wear-resistant coating based on laser cladding, relates to the technical field of wear-resistant coatings, and is used for solving the technical problem that a high-performance wear-resistant coating cannot be prepared due to poor bonding quality and low cladding efficiency of a cladding layer and a copper-zirconium alloy matrix in the existing laser cladding process. The preparation method of the copper-zirconium alloy wear-resistant coating based on laser cladding comprises the following steps: obtaining a copper-zirconium alloy matrix; preparing a CuSn film layer on the surface of the copper-zirconium alloy matrix, wherein the thickness of the CuSn film layer is 0.5-2 microns; preparing an iron-based coating on the surface of the CuSn film layer, wherein the thickness of the iron-based coating is 0.8-1.0 mm; preparing a wear-resistant layer on the surface of the iron-based coating, wherein the thickness of the wear-resistant layer is 1-1.2 mm; the material for preparing the wear-resistant layer is nickel-based alloy composite ceramic powder, and the nickel-based alloy composite ceramic powder comprises nickel-based alloy and ceramic powder.

The invention discloses an uncooled infrared detector and a manufacturing method thereof, and relates to the technical field of detectors, the uncooled infrared detector comprises a readout circuit, the readout circuit is provided with a micro-bridge structure and an umbrella-shaped absorption structure, the micro-bridge structure comprises a metal electrode, a reflecting layer, a first sacrificial layer, a first supporting layer, an electrode layer and a thermosensitive layer, and the electrode layer is arranged on the supporting layer. The thermosensitive layer is arranged on the electrode layer, and the first passivation layer is arranged at the top of the microbridge structure. By adopting the thermosensitive layer with a three-layer structure of vanadium oxide, vanadium and vanadium oxide and optimizing sputtering process parameters, the sensitivity and the stability of the thermosensitive film are improved, secondly, due to the design of an umbrella-shaped absorption structure and the synergistic effect of the second sacrificial layer, the second supporting layer and the absorption layer, the absorption rate and the filling rate of an infrared pixel are improved, and the stability of the film is improved. Not only is the absorption efficiency of infrared radiation enhanced, but also a heat conduction path is optimized, so that the response speed and the signal-to-noise ratio of the detector are improved.

A cutting tool includes a substrate at least partially coated with a coating. The substrate is a cemented carbide, cermet or ceramic. The coating includes a layer of Ti(C,N), a layer of Al2O3 and there between a bonding layer. The Ti(C,N) layer is composed of columnar grains, wherein an average grain size D422 of the Ti(C,N) layer is 25-50 nm, and wherein the Ti(C,N) layer includes a portion B1 that is adjacent to the bonding layer. An average grain size of the Ti(C,N) grains in portion B1 is larger than the average grain size D422 in the whole Ti(C,N) layer. In the portion B1 of Ti(C,N) layer the Ti(C,N) grains has an average grain size of 140-300 nm.

The present invention relates to a method for manufacturing a part (1) with improved resistance to oxidation and high-temperature corrosion, comprising at least the deposition of a non-cracked crystalline β-Yb2Si2O7 environmental barrier layer (7) on an at least partially ceramic matrix composite material (3), wherein the environmental barrier layer is deposited by chemical vapour deposition from a gas phase comprising a precursor mixture of (a) a compound A of formula SiClxHy, in which x is an integer from 1 to 4 and y is an integer from 0 to 3, with x + y = 4, and (b) elementary ytterbium or ytterbium(III) chloride, and wherein, during deposition, a temperature between 1100°C and 1300°C and a pressure of 150 mbar or less are imposed.