92 results about "Reaction layer" patented technology

Provided is a method that allows for the etching of a silicon nitride film with respect to a silicon oxide film with high selectivity and high precision while preventing a degradation in the shape of the silicon oxide film portion during etching. The etching method of dry etching a film structure which is formed in advance on a wafer disposed in a processing chamber and in which an end portion of a film stack including a silicon nitride film and silicon oxide films vertically sandwiching the silicon nitride film forms a sidewall of a trench or hole, by supplying a gas for processing into the processing chamber, without using plasma includes: forming, as a first process, a reaction layer on the silicon nitride film by reaction of hydrogen fluoride gas at 30° C. or higher and 55° C. or lower; removing, thereafter, as a second process, the reaction layer having been formed in the first process, through volatilization by performing heating at 70° C. or higher and 110° C. or lower without causing the hydrogen fluoride gas to flow; and etching the silicon nitride film from the end portion in a lateral direction by performing the first and second processes a plurality of times.

The invention belongs to the technical field of surface engineering, and relates to a preparation method of a protective coating for a metal connector of a solid oxide battery. A compact transition metal oxide inner layer is deposited on a metal substrate in a reactive sputtering mode, then a transition metal alloy outer layer is deposited in a metal sputtering mode, a transition metal oxide / transition metal alloy composite coating is formed, and a spinel protective layer is formed after annealing treatment. According to the method, a transition metal oxide inner layer is used as a diffusion barrier layer, diffusion of elements such as Cr from a substrate to a coating and diffusion of oxygen to the substrate in the high-temperature annealing and long-term service process are effectively inhibited, and therefore the thickness of a reaction layer and the thickness of a thermal growth oxide layer are remarkably reduced. The composite coating is compact in structure, stable in component, good in matching with the thermal expansion coefficient of the substrate, excellent in oxidation resistance and low in surface specific resistance, and capable of effectively improving the long-term operation stability and prolonging the service life of the SOC connector.

The invention provides a nitrogen-containing boric acid ester-nano hybrid composite anti-wear additive as well as a preparation method and application thereof, and belongs to the technical field of lubricating oil additives. The nitrogen-containing boric acid ester, the functionalized nanoparticles, the ionic liquid, the auxiliary anti-wear agent and the dispersion stabilizer are subjected to nano-scale hybrid compounding, and the nitrogen-containing boric acid ester, the functionalized nanoparticles, the ionic liquid, the auxiliary anti-wear agent and the dispersion stabilizer have a synergistic effect on four aspects of physical bearing, chemical adsorption, interface modification and extreme pressure enhancement; a multi-synergistic lubrication and protection system of an adsorption film, a physical isolation layer, an extreme pressure reaction layer and rolling lubrication microspheres is constructed, efficient wear resistance, friction reduction, bearing and stability improvement are jointly achieved, and the lubricating oil is suitable for insoluble base oil.

A method for forming a semiconductor device provides a substrate having a patterned structure containing a semiconductor material, wherein the patterned structure has a side profile including depressions, such as a patterned film stack, and a spacer layer conformally deposited on and within the depressions of the patterned structure; and a reaction layer formed on the spacer layer by reacting the surface of the spacer layer with a plasma-excited first etching gas, wherein the plasma-excited first etching gas contains fluorine, hydrogen, and nitrogen to form the reaction layer, and at least a portion of the reaction layer is removed by ion bombardment caused by exposure to a plasma-excited second etching gas. The spacer layer may be SiOCN. The reaction layer may be ammonium silicofluoride. The first etching gas may contain SF6, H2, and N2, or NF3, H2, and N2. The reaction and removal may be carried out at room temperature in the same chamber.

The invention discloses a magnesia-carbon-based refractory brick and a preparation method thereof, relates to the technical field of display optical films, and belongs to the technical field of surface modification of refractory materials. A sacrificial reaction layer and a transition bonding layer are prepared on the surface of the magnesia carbon brick through pretreatment of a base brick, preparation of coating slurry, gradient coating, curing and heat treatment; wherein the sacrificial reaction layer can realize high-temperature instant cooling through a controllable endothermic reaction, and meanwhile, a reaction product forms a compact protective layer to block slag permeation; the preparation process is simple and controllable, the prepared coating is firmly combined with the magnesia carbon brick body, the high-temperature oxidation resistance and the slag penetration resistance of the magnesia carbon brick can be remarkably improved, the service life of the magnesia carbon brick can be remarkably prolonged, and the magnesia carbon brick has the advantages of low cost and high practicability. The method is suitable for magnesia carbon brick protection under severe working conditions of high-temperature metallurgical furnaces and kilns and the like.

The invention belongs to the field of interface structure characterization of a monofilament SiC fiber reinforced titanium / titanium aluminum-based composite material, and particularly relates to a quasi-in-situ measurement method for the thickness of an interface reaction layer of the monofilament SiC fiber reinforced titanium / titanium aluminum-based composite material. The monofilament SiC fiber reinforced titanium / titanium aluminum matrix composite is prepared by adopting a precursor wire method in combination with a hot pressing or hot isostatic pressing process, and an interface reaction layer can be formed on a fiber-matrix interface in the composite forming process of fibers and a titanium / titanium aluminum alloy matrix. And the thickness measurement positions and the number of measurement points of the composite material interface reaction layer in different states are specified, so that the accuracy and the consistency of measurement results are ensured. The method is suitable for measuring the thickness of the interface reaction layer of the monofilament SiC fiber reinforced titanium / titanium-aluminum-based composite material in a forming state and a heat treatment state, and a material data basis is provided for structural design and application of a monofilament SiC fiber reinforced titanium / titanium-aluminum-based composite material component.

The application provides a composite carbon material and a preparation method thereof, and the preparation method at least comprises the following steps: providing a carbon base; mixing a tantalum-containing compound with an organic solvent to obtain a tantalum-containing slurry; uniformly covering the tantalum-containing slurry on the surface of the carbon base to obtain a reaction layer on the carbon base; uniformly covering tantalum powder on the reaction layer to obtain a tantalum metal coating layer on the reaction layer; heating the carbon base with the tantalum metal coating layer to a preset temperature under a vacuum state, and keeping the temperature for a preset time; and cooling the heated carbon base to room temperature to obtain the composite carbon material. Through the composite carbon material and the preparation method thereof, the compactness and quality of the tantalum carbide coating layer can be improved.

The application discloses a brazing filler metal for titanium alloy and stainless steel connection and application thereof, and the brazing filler metal comprises an Ag-Cu eutectic brazing filler metal base and NiTi alloy particles. By introducing the NiTi alloy particles into the Ag-Cu eutectic brazing filler metal base, the Ni and Ti in the interface neighborhood are cooperatively involved in diffusion and reaction, the wetting and forming consistency of the brazing filler metal are cooperatively improved, the interface reaction layer is formed into a discrete thin layer, the continuous brittle reaction layer is inhibited from being generated, the risk of crack propagation along the interface is reduced, the shear strength of the brazing filler metal welding joint for titanium alloy and stainless steel connection is remarkably improved, and the forming quality and batch consistency of the brazing joint are improved.

This utility model belongs to the technical field of lubricating oil additive production equipment. Specifically, it discloses a reaction device for producing lubricating oil additives. The reaction tank is equipped with a stirring shaft, and the stirring shaft is fixedly connected from top to bottom with a paddle stirring blade, a double spiral stirring blade, and a turbine stirring blade. A processing box is fixedly connected to the top of the condenser, and a condenser tube is installed inside. A water pipe is sleeved on the outside of the straight part of the condenser tube, and a spiral guide plate is installed on the straight part inside. A vertically arranged reaction layer is fixedly connected in the second chamber, and several horizontally arranged activated carbon layers are fixedly connected in the first chamber. A liquid outlet pipe is fixedly connected to the bend at the lower end of the condenser tube. This utility model makes the reaction more uniform by setting three different stirring blades. By setting the condenser tube, reaction layer, and activated carbon layer, harmful gases can be purified multiple times to avoid environmental pollution.

The invention relates to the technical field of metal-based composite materials, in particular to a nanometer lanthanum hexaboride reinforced titanium-based composite material and a preparation method of the nanometer lanthanum hexaboride reinforced titanium-based composite material. The composite reinforcements are uniformly dispersed in the titanium alloy matrix; wherein the composite reinforcement is of a core-shell structure, the core of the core-shell structure is nano lanthanum hexaboride particles, and the shell layer of the core-shell structure is an in-situ reaction layer coating the outer surfaces of the nano lanthanum hexaboride particles; the in-situ reaction layer is a transition layer with components and a structure in gradient change, and the transition layer at least comprises a La / B-rich amorphous transition region and a TiB whisker layer which are distributed from inside to outside. According to the preparation method, low-energy mixing and spark plasma sintering are adopted, controllable in-situ reaction of nano LaB6 and Ti is induced, a LaB6 core and gradient reaction layer core-shell structure composite reinforcement is constructed, and nano La2O3 particles are separated out, so that reinforcement phase agglomeration is inhibited, interface bonding is improved, and the contradiction of strong plasticity inversion is solved.

The application relates to the technical field of ceramic surface metallization, in particular to a Si3N4 ceramic Cu-coated plate and a preparation method thereof. The Si3N4 ceramic Cu-coated plate comprises Si3N4 ceramic plates, an interface bonding layer and an oxygen-free copper layer arranged in sequence, the interface bonding layer comprises a filler metal layer and a foam copper layer, and the filler metal layer is located on at least one side of the foam copper layer. The filler metal layer is connected to the Si3N4 ceramic by forming a reaction layer through reaction with the Si3N4 ceramic, the foam copper layer is arranged between the Si3N4 ceramic plate and the oxygen-free copper layer, the AgCu eutectic structure in the filler metal has a relatively low melting point (779 DEG C), the foam copper intermediate layer is softened and agglomerated, under the action of tension, a periodic columnar array solid solution structure is uniformly distributed on the bonding interface, the periodic columnar array can form a mechanical engagement effect, plastic deformation occurs on the interface under stress, energy in the strain process is absorbed, the bonding strength of the interface is improved, and the mechanical properties of the brazed joint are improved.

The utility model discloses an assembly structure for synthesizing diamonds by a high-temperature and high-pressure method, which relates to the technical field of diamond synthesis and comprises an outer layer structure, a middle layer heating and insulating system, a core reaction layer and a top covering layer which are sequentially arranged from outside to inside, the outer-layer structure comprises a pyrophyllite composite block, a pyrophyllite ring surrounding the outer side of the pyrophyllite composite block and a conductive steel cap fixed to the top, the middle-layer heating and insulating system comprises a heating sleeve embedded into the pyrophyllite composite block, a heating piece is arranged in the heating sleeve, a magnesium oxide insulating sleeve is wrapped in the heating piece, and the outer-layer structure and the middle-layer heating and insulating system are arranged in the heating sleeve. A vertically supported thick zirconium oxide column is arranged below the heating sleeve, the core reaction layer comprises a magnesium oxide crystal bed, a carbon source is placed on the magnesium oxide crystal bed, alloy is distributed around the carbon source, and the top covering layer comprises a thin zirconium oxide column covering the core reaction layer. The problems that in the prior art, obtained seeds with high carbon content grow fast, but the impurity removal capacity is weak, and the quality is poor are solved; the seeds with low carbon content are good in quality but small in size, and the economic benefit is low.

The invention belongs to the technical field of superconducting material processing, and discloses a magic angle graphene modified niobium-tin superconducting wire and a preparation method thereof. The magic angle graphene is modified on the surface of the core wire of the Nb3Sn superconducting wire prepared by the bronze method, the material can eliminate work hardening of a bronze matrix, and one-time and uninterrupted continuous stretching forming from a composite billet to the final wire is realized. In addition, the Nb3Sn superconducting wire has excellent mechanical performance, superconducting performance and strain tolerance, the magic angle graphene layer can effectively inhibit crack initiation and expansion of the Nb3Sn reaction layer under strain, and the mechanical performance of the wire is improved; the material not only can be used as an additional magnetic flux pinning center, but also can induce formation of finer Nb3Sn grains with tough grain boundaries, so that the critical current density of the wire is remarkably improved; the critical current irreversible strain limit of the Ni3Sn superconducting wire modified by the magic angle graphene is 0.8% and is obviously higher than that of a Ni3Sn superconducting wire prepared by a traditional bronze method.

This invention relates to the field of nanomaterials technology, and discloses a vanadate composite material, its preparation method, and its application. A reaction solution containing a surfactant is prepared to generate bubbles. These bubbles then act as soft templates under rapid stirring and heating. Vanadium oxide is dispersed in this reaction solution and reacted at a specific temperature for a certain time, allowing the surfactant to intercalate the vanadium oxide, transforming it into vanadate. The surfactant then coats the outer surface of the vanadate, resulting in an in-situ surface-modified vanadate composite material. The surfactant layer of this composite material can regulate the reaction layer between the electrode surface and the electrolyte, preventing electrode material dissolution or structural collapse during the electrochemical reaction process, thus significantly improving the performance of electrochemical energy storage devices. The foaming effect of the surfactant ensures that the bubbles are uniformly dispersed in the liquid, acting as soft templates for the attachment and growth of vanadate crystals.

An expiration date indicator includes a first protective sheet that prevents oxygen intrusion, an oxygen transmission film disposed beneath the first protective sheet, wherein the oxygen transmission film is composed of a plurality of separable layers, a reaction layer disposed beneath the oxygen transmission film, wherein the reaction layer reacts with oxygen and changes color, a support layer disposed beneath the reaction layer, wherein the support layer is formed of an adhesive material, and a second protective sheet disposed beneath the support layer and preventing deterioration of the support layer.

The invention relates to a boron nitride ceramic and nickel-based superalloy connecting joint and a preparation method thereof, belongs to the technical field of ceramic / metal composite structures, and solves the problem that a structure for effectively connecting boron nitride ceramic and nickel-based superalloy in a micro-level at high strength does not exist in the prior art. The connecting joint comprises boron nitride ceramic, a middle layer and a nickel-based high-temperature alloy which are sequentially connected, wherein the middle layer comprises a brazing filler metal-boron nitride reaction layer, a brazing filler metal reaction layer and a brazing filler metal-nickel-based high-temperature alloy reaction layer; the brazing filler metal-boron nitride reaction layer contains TiN; the brazing filler metal-boron nitride reaction layer in the connecting joint can effectively connect the boron nitride ceramic and the nickel-based high-temperature alloy; through the boron nitride-Ti layer reaction layer, the Ti layer and the brazing filler metal-Ti layer reaction layer, high-strength connection between the boron nitride ceramic and the nickel-based high-temperature alloy can be achieved; the connection joint can promote boron nitride ceramic to be effectively applied to thermal management of high-temperature thermal structure materials in the fields of aerospace, nuclear energy and the like.

The invention relates to a ceramic-metal brazed joint with a nanocrystalline interface reaction layer and a preparation method and application of the ceramic-metal brazed joint, and belongs to the technical field of heterogeneous material connection. The invention discloses a ceramic-metal brazed joint with a nanocrystalline interface reaction layer. The ceramic-metal brazed joint comprises a ceramic matrix, a metal matrix, an active brazing filler metal layer and a nanocrystalline structure layer, wherein the active brazing filler metal layer is used for connecting the ceramic matrix and the metal matrix, and the nanocrystalline structure layer grows in situ between the active brazing filler metal layer and the ceramic matrix. According to the nanocrystalline reaction layer disclosed by the invention, the interface bonding strength and the thermal shock resistance of the joint are remarkably enhanced through a fine grain strengthening and toughening mechanism in combination with the structural isotropy of the nanocrystalline reaction layer, and the excellent sealing reliability of the joint in a severe environment is ensured; the method is suitable for aerospace thermal protection, high-power electronic device packaging and preparation of high-temperature and high-pressure sensor sealing components.

The invention relates to the technical field of metal-based composite material preparation and processing, in particular to a low-interface reaction metal-based composite material preparation method based on powder solid-phase deposition additive, which comprises the following steps: mixing nano or micron reinforced phase particles with metal matrix powder to form composite powder; then, friction heat between the rotating tool and the substrate / deposited layer serves as a unique external heat source, powder solid-phase deposition material adding is conducted under the condition that the temperature is lower than the melting point of the metal matrix, and contact type forced cooling is conducted on a deposition area in the process; the thickness of a composite material interface reaction layer is controllable by cooperatively controlling the rotating speed, the axial pressure, the radius of a shaft shoulder and the moving speed of a tool, and finally the thickness of the composite material interface reaction layer is smaller than or equal to 30 nm, the room-temperature tensile elongation at any position is larger than or equal to 3%, and the material density is larger than or equal to 99%. The density and plasticity index of the material are ensured, and the interface reaction between a reinforced phase and a matrix is reduced.

The invention belongs to the field of solid electric heating energy storage boilers, and provides a preparation method of a high-temperature-resistant, low-expansion, high-heat-storage and high-resistance heat storage material, the heat storage material is designed based on the microstructure of the material, magnesia particles with the particle size being larger than or equal to 1 mm are selected as aggregate, and organic matter coating is conducted on the magnesia particles through a coating technology; then mixing and twisting 30-50 parts of coated magnesia particles, 40-50 parts of high-alumina bauxite, 4-6 parts of binding clay, 2-3 parts of a binding agent and 3-6 parts of an aqueous solution, bundling the mixed and twisted materials, forming a green body by adopting a mechanical pressing process, and performing high-temperature heat treatment to obtain the heat storage material. The prepared heat storage material is of a magnesia particle-annular pore-spinel / cordierite reaction layer-mullite gradient structure, so that the cooperation of low thermal expansion coefficient, high heat storage capacity and high thermal resistance of the material is realized; the chemical composition of the prepared heat storage material is as follows: 10%-50% of MgO, 50%-80% of Al2O3, 10%-40% of SiO2 and a small amount of impurities.

The invention provides a ceramic / metal multilayer brazing structure and a preparation method and application thereof, and relates to the technical field of electronic packaging. The ceramic / metal multilayer brazing structure comprises a ceramic substrate, a titanium layer, a diffusion barrier layer and a nano bonding layer from bottom to top, wherein the thickness of the diffusion barrier layer is 10-40nm. According to the ceramic / metal multi-layer brazing structure, the diffusion barrier layer is additionally arranged between the titanium layer and the nano bonding layer, Ti atoms can be effectively prevented from diffusing upwards to the Cu or Ag layer, generation of a brittle Ti-Cu reaction layer is inhibited, disintegration of the multi-layer structure and interface embrittlement can be effectively prevented, and the service life of the ceramic / metal multi-layer brazing structure is prolonged. Therefore, the integrity of the amorphous Ag / Cu multilayer structure is kept, the long-term reliability of the joint is improved, the interface structure of the joint is more uniform, the stress concentration is reduced, and the reliability under long-term thermal cycle and mechanical shock is remarkably improved.

The application provides a soft and hard collaborative processing method for photoelectric materials, and the processing process comprises the following steps: S1, contacting soft abrasive particles with the surface of the photoelectric material and moving relative to the photoelectric material, and under the action of pressure, the soft abrasive particles react with the photoelectric material to form a chemical reaction layer, and the hardness of the chemical reaction layer is less than the hardness of the photoelectric material; S2, under the action of pressure, the hard abrasive particles can cut into the chemical reaction layer, and the cutting depth is equivalent to the depth of the chemical reaction layer, and the processing path coincidence degree of the hard grinding area and the soft grinding area is basically consistent, so that the hard grinding area can quickly remove the chemical reaction layer along the processing path of the soft grinding area, and expose the fresh surface of the photoelectric material, to complete the single soft and hard collaborative processing; S3, repeating steps S1 and S2 to complete the processing of the photoelectric material. The application can improve the processing efficiency, the processing controllability and the processing quality, and the processing method is simpler.

The utility model belongs to the technical field of ionizing radiation detection, and particularly relates to a halide scintillation crystal detector for petroleum logging. The device comprises a shell and a reaction layer, the shell is a sealed shell, a scintillation crystal is packaged in the shell, and a light transmission device is coupled to a light emitting surface, corresponding to the scintillation crystal, of the shell; and the reaction layer is filled between the shell and the scintillation crystal and is used for absorbing water and oxygen. The utility model is used for solving the problem that the scintillation crystal is easy to deliquesce at high temperature. By filling the reaction layer in the shell for sealing and packaging the scintillation crystal, trace water and oxygen in a sealing system are removed by utilizing the reaction between the reaction layer and water and oxygen in the shell, so that the problem of deliquescence of the scintillation crystal caused by reaction between water and oxygen and the scintillation crystal is avoided.

The invention discloses a method for reducing appearance marks on a copper surface after AMB solder etching, and the method comprises the following specific steps: S1, pressing and cutting a high-purity oxygen-free copper strip into a copper foil with the same size as supplied ceramic, and carrying out surface treatment; s2, stacking the high-purity oxygen-free copper strip and the ceramic for welding; s3, before silk-screen printing, the active metal brazing filler metal is taken out of the environment at the temperature below zero and placed at the room temperature for a period of time, and bubbles in the brazing filler metal are removed; s4, the active metal solder is combined with the high-purity oxygen-free copper strip and the ceramic substrate, and a reaction layer capable of being wetted by the liquid solder is generated; s5, performing chemical etching on the copper on the surface of the ceramic; s6, the preparation ratio of the hydrogen peroxide to the ammonia water to the EDTA-2Na is 13L: 10L: 1260g; s7, cutting the ceramic substrate; according to the method, the problem of copper surface corrosion is solved, the operation time is shortened, and the productivity is improved.

This invention provides a Joule-thermal hollow fiber membrane reactor and membrane separation method, belonging to the field of hydrogen production. It includes a reactor shell and a metal hollow fiber membrane. The reactor shell forms a chamber with a material inlet and outlet. The metal hollow fiber membrane is disposed within the chamber and is cylindrical, comprising a separation layer and a reaction layer stacked along its diameter. The separation layer and / or reaction layer are electrically connected to a power supply circuit. As the current intensity flowing through the separation layer increases, the temperature of the separation layer increases; as the current intensity flowing through the reaction layer increases, the temperature of the reaction layer increases. Along the axis of the metal hollow fiber membrane, the reaction layer forms reaction sections at different temperatures, and the separation layer forms separation sections at different temperatures. Compared with existing technologies, this invention solves the technical problem of poor hydrogen production efficiency caused by defects in the structure of existing Joule-thermal reactors in hydrogen production processes.

The utility model relates to resin magnetizing equipment for a high-speed water treatment stable suspension reaction layer, and discloses equipment which can magnetize magnetic ion exchange resin in a box body by driving a magnetic rod core frame and a plurality of magnetic rod cores connected with the magnetic rod core frame to slide through an air cylinder. The current intensity of a single drawing magnetic rod is small, the magnetic field change tends to be stable, a plurality of small-current drawing magnetic rods are uniformly arranged to directly magnetize the magnetic ion exchange resin, the generated magnetic field is more uniform, and the magnetic uniformity among magnetic ion exchange resin individuals is effectively improved. The device is characterized in that the device comprises an outer frame, a box body and a magnetizing assembly, the outer frame is arranged on the box body, the magnetizing assembly is arranged on the outer frame, the magnetizing assembly comprises a pull-out magnetic bar and a magnetic bar core fixing grid plate capable of sliding up and down, a shell of the pull-out magnetic bar is fixedly arranged on the outer frame, and a part of the shell is located in the box body; and a magnetic rod core of the drawing magnetic rod is connected with the magnetic rod core fixing grid plate.

The utility model relates to the technical field of ultrasonic handle testing, in particular to an ultrasonic handle temperature monitoring device. A reaction layer of the observation groove for monitoring the temperature of the ultrasonic handle is transversely arranged into a plurality of test areas in which test gel is placed respectively, the test gel is specifically thermochromic gel made of a temperature sensitive material, and the thermochromic gel in each test area is subjected to a color change reaction in different temperature ranges respectively; after the ultrasonic handle is arranged in the observation groove and is aligned with the test gel in the test area to work for a preset time period, if the working temperature of the ultrasonic handle reaches the sensitive temperature of the test gel in the test area, a color change reaction occurs, and a union set of all the test areas subjected to the color change reaction serves as the temperature range of the ultrasonic handle; the relation between the color and the temperature of the test gel in each area is calibrated in advance, so that the working temperature range of the ultrasonic handle can be directly deduced, and the relatively small temperature range of the ultrasonic handle can be measured relatively accurately.

The invention provides an anisotropic low-magnetic self-propagating connection thin film, a preparation method and a ceramic circuit board assembling method, and belongs to the technical field of semiconductor packaging. The anisotropic low-magnetic self-propagating connection thin film comprises a reaction layer and a light inhibition coating which are arranged in a stacked mode. Wherein the reaction layer comprises a plurality of first component layers and a plurality of second component layers, the first component layers and the second component layers are sequentially and alternately stacked, and the components of the first component layers and the second component layers are any one of Zr-B, Hf-B, Zr-Si, Ta-Si, Ti-C and V-Al; and the light-inhibiting coating is formed by nano-texture blackened carbon or coarsened TaN. The self-propagating system disclosed by the invention is a low-magnetism system, the high-speed electrical performance and magnetic cleaning requirements are met, and the high-frequency loss and EM interference on the CPW / microstrip line are reduced.

The invention provides a brazing method for modified porous SiC ceramic and 2507 duplex stainless steel, and belongs to the technical field of welding. The brazing method comprises the following steps that silicon carbide suspension slurry is prepared; adhering the silicon carbide suspension slurry to the surface of the porous SiC ceramic, drying, discharging glue, and sintering to obtain the modified porous SiC ceramic; and after the surface of the pretreated porous SiC ceramic is polished, 2507 duplex stainless steel, the high-entropy alloy brazing filler metal and the modified porous SiC ceramic are stacked from top to bottom, vacuum brazing is carried out, and natural cooling is carried out at the room temperature after the reaction is finished. According to the method, the porous SiC ceramic surface with poor welding performance is subjected to densification modification treatment, the high-entropy alloy brazing filler metal is good in fluidity and can be well combined with the densified surface layer, the residual stress of the porous ceramic and a metal reaction layer is reduced, and the porous ceramic and metal can form the compact reaction layer with a stable structure under the action of the brazing filler metal.

The application discloses a kind of nanocomposite aluminum base alloy for hot-dip aluminizing and hot-dip aluminizing method, and it relates to hot-dip plating technical field, it uses yttrium (Y) and cerium (Ce) to form composite rare earth modifier, synergistic nanocarbide strengthening phase, and compatibility necessary silicon (Si), iron (Fe), manganese (Mn) element, form a set of complete aluminum base alloy formula technical means, combined with supporting in-situ reaction synthesis and ultrasonic auxiliary preparation process, reached in significantly refining interface reaction layer, while greatly improving the effect of coating hardness, toughness, salt fog corrosion resistance and high temperature oxidation resistance comprehensive performance, successfully solved the key technical problems of existing hot-dip aluminizing technology nanometer reinforcing body dispersion difficulty, interface bonding force is weak, and traditional modification element function single, difficult to synergistically improve the key technical problems of coating strength and toughness and durability.

The invention relates to a method for transferring a structure (2', 2), which is arranged on a substrate (1, 1') and / or which is embedded in the substrate (1, 1'), from an actual state into a target state, in particular before further processing, e.g. singulation or accommodation into a substrate holder (6), or / or before and / or during a bonding of substrates (1, 1'), comprising: - Providing a substrate (1, 1') having at least one structure (2', 2) in the actual state, - Providing at least one reaction layer (5r) which is integrated in particular into a layer system (3), - Implementing an operative connection between the at least one reaction layer (5r) and the substrate (1, 1') in such manner that a state of change in the at least one reaction layer (5r) causes a deformation in the substrate (1, 1'), - Triggering the state of change in the at least one reaction layer (5r) by means of an influencing means (8), wherein the state of change in the at least one reaction layer (5r) is induced in a locally limited manner such that the structure (2', 2) is transferred from the actual state into the target state.