711 results about "Inter layer" patented technology

The invention relates to the technical field of packaging film production, and discloses a production process of a three-layer co-extrusion FFS (fringe field switching) heavy coating film, which comprises the following steps: S1, selecting proper raw materials including an outer layer material, an inner layer material and a middle layer material; s2, drying the selected raw materials respectively to ensure that the moisture content is lower than 0.1%; s3, uniformly mixing different materials and additives through premixing equipment; s4, feeding the three materials into co-extrusion equipment, simultaneously extruding melt materials of different layers through a co-extrusion machine, and forming a multi-layer film structure through a die head; and S5, controlling the temperature and the flow speed at the die head to ensure the fluidity and the pressure distribution uniformity of the material melt of each layer. Through a dynamic stretching device, a pressure feedback control system, an optimized die head design and an intelligent control system, uniform film bubble expansion, accurate film thickness control and improvement of film quality stability are realized, the production efficiency and automation are improved, and the consistency and overall performance of film quality are remarkably improved.

The invention discloses a method for preparing a copper-aluminum layered composite board by introducing laser into an intermediate layer, which comprises the following steps: introducing laser into the intermediate layer (Al-Cu-Mg-Si-Zr-Sc series alloy), so that on one hand, copper and aluminum to be compounded are in a heating state to be subjected to rolling compounding by utilizing the heat conduction effect of the heated intermediate layer; the rolling reduction rate and the rolling mill capacity requirement are obviously reduced; and on the other hand, the added middle layer has excellent obdurability, so that the cooperative deformation capacity between the to-be-compounded dissimilar materials can be improved, and the interface bonding performance of the composite material is improved. And a mode of'introducing laser into the middle layer and carrying out short-time online annealing treatment 'is adopted to replace'large down pressure and long-time diffusion annealing' adopted by a traditional copper-aluminum composite material, so that the processing and forming efficiency of the copper / aluminum composite material is remarkably improved, and the method has the characteristic of short process.

The invention discloses a multilayer co-extrusion heat-shrinkable film and a preparation method thereof, the film comprises an outer wear-resistant layer, a middle support layer and an inner functional layer, the thickness ratio of each layer is 1: 3: 1-1: 5: 1, the total thickness is 50-150 [mu] m, and the raw materials are prepared according to respective formulas. The preparation method comprises the steps of raw material preparation, melt mixing, die head extrusion, two-way stretching, water-cooling shaping, electronic crosslinking, aging treatment, heating softening and cold and hot shaping. The carbon nanotubes (CNT) and the h-BN nanosheets synergistically hinder crack propagation in the middle layer, so that the crack propagation resistance of the film is remarkably improved, the tensile strength, the thermal shrinkage rate and other properties are also optimized, compared with a traditional film, the comprehensive properties of wear resistance, high strength and high thermal shrinkage rate are achieved through interface collaborative design, meanwhile, the production cost is reduced by 20-30%, and the application prospect is wide. The method is suitable for food packaging, electronic device protection and other fields.

The invention belongs to the technical field of composite material casting, and relates to an aluminum / iron bimetal composite material based on a micro-textured intermediate layer and a preparation method thereof.The micro-textured intermediate layer is pre-arranged on the surface of an iron base material in advance in an electro-deposition and laser etching composite mode, and in the liquid-solid composite casting process, the micro-textured intermediate layer is pre-arranged on the surface of the iron base material in advance; the middle layer plays a role in isolating direct contact between the liquid aluminum alloy melt and the solid iron base material, and the microstructure on the surface of the middle layer plays a role in inducing stress coordinated distribution. The problem that the interface is easy to crack can be effectively solved through dual control of the interface phase composition and the interface structure of the aluminum / iron double-metal composite material, so that the interface bonding strength of the aluminum / iron double-metal composite material is stably improved.

The invention relates to the field of bimetal composite materials, in particular to a method for researching the influence of an intermediate layer on bimetal interface assembly and performance, which comprises the following steps: electrochemically depositing a FeCoNiCr-M high-entropy alloy coating; a micro-textured high-entropy alloy coating is constructed in a laser controllable manner; according to Al / HEA / Fe composite material liquid-solid forming process optimization and structure property characterization, the Al / HEA / Fe composite material liquid-solid forming process optimization and structure property characterization method has the following beneficial effects that according to the requirement for Al / Fe bimetal high interface bonding strength, the microtextured high-entropy alloy coating is prepared through the electrochemical and femtosecond laser composite technology, the microtextured high-entropy alloy coating serves as a middle layer between a solid steel matrix and a liquid aluminum alloy melt, and the high-strength Al / HEA / Fe composite material is obtained; the Al / HEA / Fe composite material is obtained through a liquid-solid forming technology, and the Al / HEA / Fe composite material is obtained through high-entropy alloy component / content optimization, coating surface structure design, technological parameter regulation and control and the like on the basis of thermal and dynamic calculation and experimental data analysis. And research on the aspects of a high-entropy alloy coating solid solution phase forming mechanism, a composite material interface structure evolution rule, an interface strengthening mechanism and the like is carried out.

The utility model discloses a multilayer composite enameled wire and a painting device thereof, the multilayer composite enameled wire comprises a copper wire core (1), the surface of the copper wire core (1) is provided with a primer layer (2), a middle layer (3) and a finishing coat layer (4) from inside to outside in sequence, the primer layer (2) is formed by compounding 12-14 high-toughness polyurethane layers with the same thickness, the thickness of the primer layer (2) is 12-28 microns, and the thickness of the finishing coat layer (4) is 12-28 microns. The middle layer (3) is formed by compounding 8-10 thermosetting resin layers with the same thickness, the thickness of the middle layer (3) is 8-20 microns, the finish paint layer (4) is formed by compounding 4-6 epoxy resin layers with the same thickness, and the thickness of the finish paint layer (4) is 4-12 microns; and the high-toughness polyurethane layer, the thermosetting resin layer and the epoxy resin layer are formed by independently baking. According to the utility model, the insulating property of the enameled wire can be improved, and the painting effect of the enameled wire is improved while the painting cost of the enameled wire is reduced.

The invention provides a wave-absorbing material, and belongs to the technical field of electromagnetic wave absorption. The wave-absorbing material comprises a metal reflection bottom layer, a wave-absorbing middle layer and a scattering upper layer, the wave-absorbing middle layer is made of a ferroferric oxide loaded reduced graphene oxide and epoxy resin (Fe3O4 (at) RGO / EP) composite material and used for absorbing electromagnetic wave energy, and the scattering upper layer is of a patterned metasurface structure made of chopped carbon fiber reinforced epoxy resin (SCF / EP). And a phase-regulated two-dimensional periodic array is formed. By arranging a three-layer structure of the metal reflecting layer, the Fe3O4 (at) RGO / epoxy composite wave-absorbing layer and the chopped carbon fiber scattering layer, broadband absorption and directional scattering control of electromagnetic waves within the range of 2-18 GHz are achieved, a stealth function composite material system with dissipation and deflection dual-mechanism cooperative work is formed, the structure utilizes the patterning design of the scattering layer, and the structure has the advantages that the structure is simple, the structure is compact, and the application range is wide. On the basis of the generalized Snell's law, engineering regulation and control of the radar wave reflection direction are achieved by regulating and controlling the reflection phase difference between pattern units, reflection energy is effectively deviated from the main lobe direction of a radar receiver, and therefore the reflection signal intensity of a target in a radar detection system is reduced.

The invention discloses an interface enhancement gradient design method of an anti-impact aviation glass laminated structure, and relates to the technical field of composite material design, the method comprises the steps of glass material preparation, interface enhancement gradient design, lamination compounding, quality detection and performance testing, the glass material comprises a glass layer material, a middle layer material and a transition layer material, the laminated composite process comprises the steps of pre-strain treatment, pre-pressing treatment, hot-pressing combination and cooling demolding, and has the advantages that by arranging the transition layers with components and performance in gradient change, the content of reinforcing materials such as nanometer titanium dioxide particles and graphene nanosheets in each transition layer is gradually increased; and compared with a traditional uniform or simple layered structure, the gradient design has the advantage that the phenomenon of interface stress concentration caused by performance difference between the glass layer and the polymer intermediate layer is remarkably reduced.

The invention provides a transparent bulletproof ceramic composite structure with an electric heating function and a preparation method of the transparent bulletproof ceramic composite structure. The composite structure comprises an anti-splashing layer (1), a first middle layer film (2), a multi-layer stacked structure (3) of glass sheets and films, a first transition layer (4), an electric heating film layer (5), a second transition layer (6), a ceramic layer (7), a first antireflection film layer (8), a second antireflection film layer (9), a third antireflection film layer (10), a second middle layer film (11), an inorganic glass layer (12), a third transition layer (13) and an anti-static layer (14) which are arranged in sequence. The composite structure provided by the invention has excellent impact resistance and bulletproof grade, can effectively resist the damage of high-speed elastic sheets or impact objects, and meets the requirements of high-safety application scenes such as weapon armors, armed airplanes and high-speed trains; and the anti-static film has clear optical observation capability, high transmissivity and anti-static property.

A load structure may include a first honeycomb layer, a second honeycomb layer, and a plurality of intermediate layers. The plurality of intermediate layers may be disposed between the first and second honeycomb layers. The intermediate layers may include one or more adhesive layers, a fiberglass layer, and a paper layer.

The invention discloses a hard coating with thermal stability and high-temperature oxidation resistance as well as a preparation method and application of the hard coating, and belongs to the technical field of nitride hard coatings. The hard coating is composed of a bottom columnar crystal TiAlN base coat, a middle columnar crystal AlTiCrN middle layer and an AlCrSiBN surface layer of a surface nanometer composite structure. Low-aluminum TiAl target deposition is adopted for the TiAlN base layer, high-aluminum AlTi target and AlCr target co-deposition is adopted for the middle of the TiAlN base layer, and high-aluminum AlCrSiB target deposition is adopted for the AlCrSiBN surface layer; the thickness of the TiAlN base coat is 0.1 to 0.5 [mu] m; the thickness of the AlTiCrN intermediate layer is 1.0 to 2.0 [mu] m; and the thickness of the AlCrSiBN surface layer is 0.05 to 0.2 [mu] m. The coating has high film-substrate binding force, thermal stability and high-temperature oxidation resistance. The inner layer of the coating has excellent thermal stability, and the outer layer of the coating has excellent high-temperature oxidation resistance, so that the coating has wide application prospects on the surfaces of products such as cutting tools and molds.

The present invention relates to the technical field of thermally conductive composite materials, and discloses a polymer-based composite material with high thermal conductivity and high insulation, wherein the composite material comprises the following components in mass percentage: a modified liquid crystal polymer matrix: 55% to 60%, wherein a benzene ring or a biphenyl rigid chain segment is introduced through an esterification reaction to improve the elastic modulus and phonon matching performance; and a surface-modified flaky boron nitride filler: 38% to 43%, wherein the filler has a thickness of 20 to 50 nanometers, a diameter of 1 to 5 micrometers, and a silicon oxide intermediate layer is coated on the surface, and the coating thickness is 5 to 10 nanometers, which is used to optimize the phonon conduction performance and reduce the interface thermal resistance. By adopting the technical scheme of coating a silicon oxide intermediate layer on the surface of the flaky boron nitride filler, a uniform and dense silicon oxide coating is prepared by a sol-gel method, and the coating thickness is optimized to be within 5 to 10 nanometers through a spin coating process and high-temperature calcination, so as to ensure that the interface performance and phonon conduction performance of the filler surface are significantly improved.

The invention discloses a low-temperature and low-pressure connection method for copper surface in-situ nanocrystallization, and relates to a copper connection method. The method aims at solving the technical problems that operation of current copper sintering connection is complex, an intermediate layer needs to be added for assistance, the connection strength is low, the interface welding rate is low, the connection temperature and pressure are too high, and the heat preservation time is long. The nanolayer is prepared on the surface of the copper substrate by adopting an in-situ nanocrystallization method, the nanostructure has relatively large surface energy, sintering connection can be realized at low temperature and low pressure, a high-strength joint is formed, and the method can be applied to the fields of copper connection, electronic packaging and the like. And under the condition of 125 DEG C / 10min / 5MPa, the shear strength of the obtained joint can reach 118.9 MPa without additionally adding a nano-particle sintering middle layer, and a connection structure with low connection temperature, short time, low required pressure and high mechanical stability is realized. The method is simple and effective to operate, can realize low-temperature connection of large-size samples, and has a wide application prospect.

Techniques for joining dissimilar materials in microelectronics are provided. Example techniques direct-bond dissimilar materials at an ambient room temperature, using a thin oxide, carbide, nitride, carbonitride, or oxynitride intermediary with a thickness between 100-1000 nanometers. The intermediary may comprise silicon. The dissimilar materials may have significantly different coefficients of thermal expansion (CTEs) and / or significantly different crystal-lattice unit cell geometries or dimensions, conventionally resulting in too much strain to make direct-bonding feasible. A curing period at ambient room temperature after the direct bonding of dissimilar materials allows direct bonds to strengthen by over 200%. A relatively low temperature anneal applied slowly at a rate of 1° C. temperature increase per minute, or less, further strengthens and consolidates the direct bonds. The example techniques can direct-bond lithium tantalate LiTaO3 to various conventional substrates in a process for making various novel optical and acoustic devices.

The present application relates to a sheath tube capable of multi-directional bending and a transcatheter intervention system. The sheath tube capable of multi-directional bending includes: a main body section; a bending section connected to the distal end of the main body section. The bending section is a multi-layer composite tube body and includes a plurality of segments. The middle layer of the multi-layer composite tube body is a braided mesh, and the density of the braided mesh of the plurality of segments gradually decreases along the direction from the proximal end to the distal end; at least a pair of traction mechanisms, each pair of the traction mechanisms sequentially passes through the bending section and the main body section to adjust the bending angle of the bending section in different directions. In the present application, the density of the braided mesh at the distal end of the bending section is set to be the smallest, so that by only controlling the traction mechanism with a relatively small acting force, the distal end of the sheath tube can be quickly adjusted to the bending angle adapted to the delivery path, thereby effectively improving the bending performance of the bending section.

The invention relates to an anti-CMAS layer-column composite structure environmental barrier coating and a preparation method thereof, belongs to the technical field of high-temperature ceramic composite materials and environmental barrier coatings, and solves the problem of corrosion failure of the environmental barrier coating caused by adhesion and permeation of corrosive substances such as water vapor or CMAS and the like into the coating in the prior art. The anti-CMAS layer-column composite structure environmental barrier coating comprises a SiC-based ceramic matrix, a bonding layer, an environmental barrier intermediate layer and an anti-CMAS corrosion layer which are sequentially stacked, the anti-CMAS corrosion layer comprises a compact sub-layer and a columnar sub-layer which are stacked in sequence; the compact sub-layer is laminated on the environmental barrier intermediate layer; the columnar sub-layer is of a columnar structure. On the premise of improving the water vapor corrosion resistance of the SiC ceramic-based composite material, the wettability of CMAS on the surface of the coating can be reduced, the infiltration speed of CMAS is delayed, and the high-temperature stability and CMAS corrosion resistance of a ceramic-based structural component are improved.

The invention provides an aluminum matrix composite laser welding structure and a welding method thereof. The welding structure comprises a first base material, a second base material, a middle layer, a first foil layer and a second foil layer. The first base material is made of a silicon carbide particle reinforced aluminum-based composite material; the second base material is a silicon carbide particle reinforced aluminum-based composite material; the middle layer is formed by mixing and pressing modified silicon carbide particles and active metal powder; one side of the first foil material layer abuts against the first base material, and the other side of the first foil material layer abuts against the middle layer; one side of the second foil material layer abuts against the second base material, and the other side of the second foil material layer abuts against the middle layer. The structure of the weld joint can be effectively improved, welding defects are reduced, and the connection strength and overall performance of the weld joint are improved.

The invention discloses a titanium-based interlayer for titanium-aluminum series dissimilar alloy diffusion welding and a preparation method and application of the titanium-based interlayer, and belongs to the field of dissimilar metal diffusion welding. The middle layer is prepared from the following components in percentage by mass: 72.7%-83.1% of Ti, 13.5%-14.8% of Mo and 2.1%-13.8% of Ta, and the sum of the mass percentages of all the components is 100%. According to the method, the oxidation resistance of the diffusion welding head is remarkably improved while the welding quality and precision are guaranteed, high-quality and high-performance diffusion welding of the TiAl / Ti2AlNb composite component is achieved, and the design index and use reliability requirements are met.

The invention discloses a preparation method of a high-toughness low-conductivity anti-radiation thermal barrier coating. The invention belongs to the technical field of thermal barrier coating materials. Aiming at the problems of thermal expansion mismatch of a precious metal second phase, failure of a multilayer structure interface and insufficient toughness of a glass ceramic-based coating in an existing coating, the invention provides a composite gradient structure design. By introducing the glass ceramic intermediate layer and the gradient functional surface layer and combining plasma spraying and high-temperature sintering processes, the characteristics of high toughness, low heat conductivity, radiation resistance and high-temperature self-healing of the coating are realized. The method comprises the following specific steps: step 1, substrate pretreatment; step 2, bonding layer preparation; step 3, glass ceramic intermediate layer deposition; step 4, functional surface layer gradient spraying; the thermal conductivity of the obtained coating is lower than 0.8 W / (m.K), the bonding strength is larger than 35 MPa, the fracture toughness reaches 4.0 MPa.m < 1 / 2 >, the infrared reflectivity at the waveband of 0.3-10 microns is larger than 0.85, and microcrack self-healing can be achieved at the temperature of 1200 DEG C. The method is suitable for ultra-high-temperature service environments such as aero-engine turbine blades.

The invention discloses an oxidized carbon black composite material and application of the oxidized carbon black composite material in a coating, and belongs to the technical field of carbon black material production.The oxidized carbon black composite material is subjected to a three-layer gradient design of a carboxylation inner core, a double-functional middle layer (hyperbranched and epoxy group) and a polyaniline / DBSA shell; three major breakthroughs of the prepared coating are realized: dispersibility and conductivity are compatible: the settling rate is less than or equal to 1.9% (solving agglomeration), and the resistance is less than or equal to 3.5 * 10 < 4 > omega / sq (constructing a high-efficiency conductive network); hygrothermal environment stability: the resistance change rate is less than or equal to + 9.1% (epoxy group and DBSA synergistically resist hygrothermal degradation); environment protection and waste reduction are achieved, a dispersing agent is replaced with a bio-based material (APG06), and the performance is not affected.

The invention discloses a Ti-Al-Mo-Ta-Cr multi-element interlayer for diffusion welding of titanium-aluminum series dissimilar alloys and application of the Ti-Al-Mo-Ta-Cr multi-element interlayer, and belongs to the field of diffusion welding of dissimilar metals. The middle layer is prepared from the following components in percentage by mass: 68.31 percent to 73.64 percent of Ti, 14.78 percent to 14.90 percent of Mo, 6.50 percent to 6.54 percent of Ta, 4.82 percent to 4.84 percent of Al and 0.13 percent to 5.54 percent of Cr, and the sum of the mass percent of all the components is 100 percent. According to the Ti-Mo-Ta-Al-Cr five-element interlayer alloy disclosed by the invention, the oxidation resistance of a diffusion welding joint can be effectively improved.

The invention discloses a Ti-Nb-Zr / MAX phase / Cr-C-N multi-layer composite coating bipolar plate and a preparation method thereof. The multi-layer composite coating sequentially comprises a Ti-Nb-Zr alloy transition layer, an MAX phase middle layer and a Cr-C-N nano composite surface layer from inside to outside. According to the Ti-Nb-Zr / MAX phase / Cr-C-N multi-layer composite coating bipolar plate and the preparation method thereof, through the synergistic effect of the Ti-Nb-Zr alloy transition layer, the MAX phase middle layer and the Cr-C-N nano composite surface layer, the comprehensive optimization of the coating performance is realized: the Ti-Nb-Zr alloy transition layer provides excellent matrix adhesive force and stress buffer effect; the MAX-phase intermediate layer provides a main corrosion-resistant barrier and self-repairing capability; the Cr-C-N nano composite surface layer provides low contact resistance and good surface stability; and meanwhile, the interlayer stress is effectively reduced by utilizing the gradient transition region, the bonding strength and long-term stability of the coating are improved, and the comprehensive performance of the multi-layer composite coating bipolar plate is effectively improved.

The invention discloses a multi-layer coated nano silicon negative electrode material and a preparation method and application thereof. The material is of a core-shell structure with a silicon core, a silicon dioxide middle layer, a hard carbon layer and a soft carbon outer layer. The preparation method comprises the following steps: (1) inner layer coating: generating a silicon dioxide or lithium silicate coating layer on the surface of nano silicon particles or silicon-based composite particles through in-situ oxidation or ectopic coating to form a core-shell structure; (2) middle layer coating: coating the surface of the core-shell structure obtained in the step (1) with a lithium-source-containing hard carbon or porous carbon layer to form composite particles; and (3) outer layer coating: coating the surfaces of the composite particles obtained in the step (2) with soft carbon, graphitized carbon or an organic-inorganic hybrid carbon layer to form three-layer coated nano silicon particles. Through a three-layer synergistic coating structure, the core problems of violent volume expansion, poor conductivity and unstable SEI film of the silicon negative electrode are effectively solved.

A formed laminated glazing for a vehicle, includes two sheets of glass of different thicknesses separated by an interlayer made of polymer material, the thickness E1 of the thick glass V1 being such that 1.4 mm≤E1≤3.9 mm, the thickness E2 of the thin glass V2 being such that 1.1 mm≤E2≤2.6 mm, the thickness E3 of the polymer material M being such that 0.3 mm≤E3≤1.2 mm, the total glass thickness EV being such that 2.5 mm≤EV≤5.7 mm, the ratio of the thicknesses E2 / E1 being such that 0.34≤E2 / E1≤0.9. This glazing combines rigidity, acoustic performance and ease of manufacture.

The invention relates to a hybrid structure for a surface acoustic wave device and an associated manufacturing method, said hybrid structure (10) comprising: a useful layer (1) of piezoelectric material joined to a support substrate (2) having a lower coefficient of thermal expansion than the useful layer (1); and an intermediate layer (3) arranged between the useful layer (1) and the support substrate (2). The intermediate layer is a sintered composite layer (3) formed from a powder of at least a first material and a second material, the second material being different from the first material.

The invention relates to the technical field of ship composite material structures and forming, and provides a super-large-span full-composite material hatch cover plate and a preparation method thereof. The hatch cover plate comprises a lower panel, a middle layer, an upper panel and an external connecting structure; the lower panel is attached to the upper panel through the middle layer to form a hatch cover plate body, the two ends of the hatch cover plate body are connected with an external connecting structure respectively, the hatch cover plate body is rapidly and conveniently connected with the external structure through the method that the main beam and the lattice structure are combined, and the force transmission supporting effect is achieved. The preparation method of the hatch cover plate comprises the following steps: step 1, forming the lower panel; 2, preparing an intermediate layer; step 3, paving an upper panel; fourthly, the main beam is connected with an external structure; pouring according to a vacuum integral forming process to obtain the required hatch cover plate; by means of the method, the span not smaller than 5 meters can be achieved, deformation is smaller than 2 mm under the self-weight working condition, and the hatch cover plate has the advantages of being light, high in strength, high in rigidity, designable in lattice structure, low in manufacturing cost, high in forming rate, low in process risk and the like.

The invention discloses a three-layer structured ultrasonic design composite material and a preparation method thereof, the three-layer structured ultrasonic design composite material comprises an upper layer fiber layer unit, a middle layer fiber layer unit and a lower layer fiber layer unit, the middle layer fiber layer unit is a cross microstructure, the upper layer fiber layer unit and the lower layer fiber layer unit are respectively a spiral microstructure, and the spiral microstructure is a cross microstructure. The upper-layer fiber laying unit, the middle-layer fiber laying unit and the lower-layer fiber laying unit are respectively provided with different fiber laying directions and laying angles, and the laying angles of the upper-layer fiber laying unit and the laying angles of the lower-layer fiber laying unit are symmetrically arranged. According to the ultrasonic design composite material, the structures and the arrangement modes of the upper, middle and lower fiber laying units are improved, so that the laying modes and laying angles of the three-layer structure are obviously different, the stress form of the three-layer structure is improved, the layering damage position of the composite material can be effectively predicted, a weak interface is improved, and the service life of the composite material is prolonged. The characteristics of high strength and high toughness of the composite material can be considered.

The invention provides a current collector and a battery using the same. The current collector comprises a base material layer and N functional layers arranged on at least one surface of the base material layer, the functional layer comprises a middle layer and a metal layer which are compounded in sequence, and the middle layer is compounded with the base material layer; the thermal expansion coefficient of a material a contained in the intermediate layer at a temperature T1 is less than 0, T1 belongs to T2, T2 belongs to x, and x satisfies {x15 DEG C < = x < = 500 DEG C}; the base material layer contains a polymer material and a filler, the thermal expansion coefficient of the filler at a temperature T3 is less than 10 * 10 <-6 > / DEG C, T3 belongs to T4, T4 belongs to y, y satisfies {y15 DEG C < = y < = 500 DEG C}, and the mass ratio of the filler in the base material layer is 0.5-30%. The current collector provided by the invention is low in residual stress, the risks of interlayer defects, cracking, layering, wrinkling and falling of the current collector can be reduced, and the electrochemical performance and the safety performance of the battery applying the current collector are improved.

The invention relates to a high-temperature-resistant nuclear fuel cladding tube based on a porous interface, which comprises a refractory metal inner layer and a SiC-based composite material outer layer which are used as the inner wall and the outer wall of the nuclear fuel cladding tube, and at least one nano beta-SiC porous interface middle layer with the porosity of not less than 20% arranged between the refractory metal inner layer and the SiC-based composite material outer layer. The invention further provides an intelligent manufacturing method of the high-temperature-resistant nuclear fuel cladding tube based on the porous interface. According to the nanometer beta-SiC porous interface interlayer structure provided by the invention, the interface thermal stress caused by thermal mismatch and temperature gradient of the nuclear fuel cladding in a high-temperature environment is greatly reduced, the thermal stability and the high-temperature resistance of the nuclear fuel cladding are improved, the design and optimization of the nuclear fuel cladding interface structure are realized, and the nuclear fuel cladding interface structure is optimized. And based on a mechanical, digital and informationized preparation process, process parameters during preparation of the nuclear fuel cladding can be accurately controlled, high-quality production is ensured, and intelligent manufacturing of the nuclear fuel cladding is realized.

The invention discloses a method for instantly connecting SiCf / SiC and nickel-based superalloy through a composite metal interlayer part in a liquid phase mode. The method aims at solving the technical problems that the interface reaction of a joint of a Cu-based active metal brazing SiCf / SiC composite material and a nickel-based high-temperature alloy is difficult to regulate and control, and brittle intermetallic compounds in a weld joint structure are difficult to inhibit. The composite metal intermediate layer provided by the invention is directly enriched at the SiCf / SiC side interface by means of the active elements, an instantaneous liquid phase is formed in the welding process, the relative activity of the active elements is high, interface connection can be realized through efficient and rapid interface reaction, and meanwhile, due to the fact that the content of the active elements in the intermediate layer is relatively low, the performance of the composite metal is greatly improved. And brittle intermetallic compounds in the welding seam are inhibited, and the obtained joint has firm interface bonding and a plastic and tough welding seam structure. The room-temperature shear strength of the joint can reach 70 MPa or above, and the high-temperature shear strength at the temperature of 500 DEG C can reach 55 MPa or above.