248 results about "Metal foam" patented technology

The invention discloses an adsorption heat storage material with a multi-stage stepped pore structure and a preparation method of the adsorption heat storage material, according to the material, a metal foam matrix is combined with the multi-stage pore structure, and the storage and release efficiency of heat energy is remarkably improved. Specifically, the metal foam matrix is composed of a plurality of metal foam layers with different porosities, and the porosities are gradually increased in the heat source direction, so that the heat resistance is effectively reduced, and the diffusion of adsorbate is accelerated. The adsorbent coating is coated with an adsorption material mixture containing a template agent, and is subjected to drying and roasting treatment to form a multi-stage pore structure comprising macropores, mesopores and micropores, so that the adsorption diffusion speed and the adsorption capacity are improved. The material not only improves the heat energy storage and energy release capabilities, but also optimizes the diffusion rate of adsorbate. According to the preparation method, through simple and convenient processes such as splicing of the metal foam layer and coating of the adsorbent, the production cost is reduced, the preparation process is efficient and controllable, and wide application prospects are achieved.

The invention discloses a manganese oxide monolithic metal foam catalyst and a preparation method and application thereof, and belongs to the technical field of air purification. A manganese acetate solution is used as an electrolyte, a three-electrode system is used for carrying out electro-deposition on a pretreated metal foam substrate, and a product obtained after electro-deposition is washed and dried to obtain the manganese oxide monolithic metal foam catalyst. The preparation method of the manganese oxide monolithic metal foam catalyst disclosed by the invention is simple to operate, not only is suitable for metal substrates in any shape, but also can ensure that the active components of the manganese oxide are firmly loaded and uniformly dispersed on the substrate; the catalyst has the advantages of excellent activity, good conductivity, industrial application facilitation and the like. The manganese oxide monolithic metal foam catalyst provided by the invention still has excellent long-time use stability and water resistance under a high-humidity condition.

Liquid metal thermal interface materials and their uses in electronics assembly are described. In one implementation, a semiconductor assembly includes: a semiconductor die; a heat exchanger; and a thermal interface material (TIM) alloy bonding the semiconductor die to the heat exchanger without using a separate metallization layer on a surface of the semiconductor die or a surface of the heat exchanger. The TIM alloy may be formed by placing a TIM material between the semiconductor die and the heat exchanger, the TIM material comprising a first liquid metal foam in touching relation with the surface of the semiconductor die, a second liquid metal foam in touching relation with the surface of the heat exchanger.

The invention discloses a low-frequency broadband sound absorption metamaterial structure based on metal foam and a metamaterial sound barrier, the metamaterial structure comprises a metal foam layer and a composite resonant sound cavity layer, and the metal foam layer and the composite resonant sound cavity layer are stacked; the composite resonance sound cavity layer comprises a mother cavity structure and a son cavity structure, the son cavity structure is embedded in the mother cavity structure, and the mother cavity structure and the son cavity structure are both provided with openings facing the metal foam layer, so that incident sound waves can enter the mother cavity structure and the son cavity structure after propagating through the metal foam layer; cavities of the primary cavity structure and the secondary cavity structure are one-way uniform-section cavities. The low-frequency and broadband high-efficiency sound absorption composite material is applied to the field of acoustic noise reduction, achieves low-frequency and broadband high-efficiency sound absorption performance, has high rigidity and strength and excellent environmental adaptability, can bear loads, is good in environmental tolerance and excellent in fireproof performance, is suitable for various complex and severe environments, ensures a long-term stable working state, is convenient to manufacture in batches at low cost, and has wide application prospects. And the economic feasibility is improved.

A bipolar plate-gas diffusion layer (GDL) assembly for a polymer-electrolyte-membrane fuel cell includes a flat metallic bipolar plate and a porous metal GDL adjacent to and in direct contact with the flat metallic bipolar plate. The porous metal GDL includes flow channels defined by flow channel walls with flow channel surfaces. The flow channel walls and flow channel surfaces have an average porosity generally equal to an average porosity of an interior of the porous metal GDL.

The invention relates to the technical field of brazing, and particularly discloses a tungsten alloy and molybdenum alloy brazing connection method which comprises the following steps: S1, pretreating a tungsten alloy base material and a molybdenum alloy base material; s2, the brazing filler metal is placed between the tungsten alloy base metal and the molybdenum alloy base metal, the foamed nickel is placed between the brazing filler metal and the molybdenum alloy base metal, and a pre-brazed assembly is obtained after compaction; wherein the composition of the brazing filler metal is Ni < re > Ti Zr Cr < c > Cu < d >; and S3, the pre-brazing assembly is placed in a vacuum brazing furnace to be subjected to brazing treatment. The Cu, Cr and Zr elements are added on the basis of conventional Ni-Ti brazing filler metal, and the plasticity, toughness and mechanical property of a connector can be improved. Meanwhile, the metal foam nickel middle layer is added in the brazing process, residual strain energy can be absorbed, the flow dividing brazing filler metal is refined, the microstructure is changed, a stable structure is formed, and the mechanical property of a connector is remarkably improved.

The present disclosure relates to a secondary solid-state battery, with a current collector configuration that includes a metal foam sandwiched between two microporous carbon layers. The current collector directly interfaces with both the negative electrode and the solid electrolyte separator. Alternatively, the current collector can comprise an elastomer sandwiched between a pair of metal foil layers, enabling responsive expansion and contraction in accordance with the electrodes' changes during charge-discharge cycles. Another embodiment contemplates a carbon fiber paper current collector situated between two microporous layers.

The invention relates to a composite material / metal combined type automobile door anti-collision beam structure with an energy absorption box and preparation, and belongs to the technical field of automobile parts, the composite material / metal combined type automobile door anti-collision beam structure comprises a metal anti-collision beam main body, the metal energy absorption box, a double-concave outer arch type thermal forming stamping metal plate and a double-concave outer arch type carbon fiber composite material plate. The cross section of the metal anti-collision beam main body is shaped like a Chinese character'ri ', and a metal foam material foamed aluminum is added in a gap part of the shape like the Chinese character'ri' to serve as an energy absorption core material; the metal anti-collision beam body, the metal energy absorption box and the double-concave outer arch type thermal forming stamping metal plate are fixedly connected in a bolt connection mode. The double-concave outer arch type carbon fiber composite material plate is designed in a variable-angle and variable-thickness layering mode. The automobile door anti-collision beam has good corrosion resistance and excellent mechanical property, the strength of the automobile door structure is improved, and meanwhile the requirements of the current market for automobile light weight, energy conservation and emission reduction are met.

The utility model discloses an upper inlet type power distribution cabinet waterproof structure with water entering from a cable drainage mode, which comprises a fireproof foam board, a lower through hole is arranged on the fireproof foam board, the fireproof foam board is inserted into a half-surrounding frame of a third metal mold, a fourth metal mold is arranged on the rear side of the fireproof foam board, and a lower through hole is arranged on the fourth metal mold. The two ends of the fourth metal mold are connected with the two sides of the third metal mold correspondingly, a first metal mold is clamped to the tops of the third metal mold and the fourth metal mold, a second metal mold is clamped between the first metal mold and the third metal mold, and a non-metal foam PT plate is arranged between the first metal mold and the second metal mold. And an upper through hole is formed in the nonmetal foam PT plate. The upper inlet type power distribution cabinet waterproof structure with water entering from the cable drainage mode is additionally arranged on the cable harness at the top of the power distribution cabinet, so that water can be prevented from directly invading the power distribution cabinet in the drainage mode along the cable penetrating into the power distribution cabinet from the bridge, the waterproof effect is good, and the service life is long.

The invention discloses copper metal foam and a preparation method of the copper metal foam, the copper metal foam comprises a copper-based supporting body and foamy copper supported by the supporting body, and the copper-based supporting body comprises at least one of a copper net and a copper foil. In the application, the copper-based support body is arranged to provide support for the foamy copper, so that the strength of the copper metal foam can be improved while the lightweight of the material is met, a new-generation multifunctional material solution is provided for the fields of new energy, 5G communication and the like, and the copper metal foam is suitable for the fields of new energy battery current collectors, electromagnetic shielding devices, environment-friendly catalytic carriers and the like.

The invention discloses an integrated battery module integrated with a thermal management device, which belongs to the field of thermal management of lithium ion batteries and comprises a shell, an outer wall, an inner wall, a micro-channel, an inlet, an outlet, an accommodating bin, a bare roll core upper cover plate and a tab lead-out port. According to the invention, the heat dissipation shell is used as a battery core packaging shell, and as only one layer of water-cooled jacket (micro-channel) thin wall is arranged between the cooling liquid and the bare roll core for producing heat, the heat resistance is extremely small, and the heat dissipation path is shortest, the fastest heat dissipation rate and the optimal temperature uniformity can be realized, the heat management performance is improved, and the battery is particularly suitable for ultrahigh-rate charge and discharge scenes; a battery cell independent shell and a part of module structural members are omitted, high function integration is realized, the weight is reduced from the source of the system, and the potential of light weight is larger; the integrated heat dissipation shell serves as a main force bearing structure, and the compression resistance and impact resistance of the integrated heat dissipation shell are far better than those of a traditional liquid cooling plate only serving as an additional part in combination with the enhancement effect of metal foam. Redundant parts are reduced, and the mass energy density and the volume energy density of the battery pack are improved.

The present invention relates to the field of nuclear technology. A container for storing, transporting, and disposing of solid radioactive waste comprises a canister made of reaction-sintered silicon carbide with a free silicon content of 3% to 30% by weight, with a fumed silicon carbide layer deposited on the canister's surface. The canister's outer layer is made of metal foam with an open porosity of 60% to 70% and a pore size of 5 mm to 6 mm. The pores are filled with dispersed boron carbide powder of 40 to 50 μm in diameter, thereby protecting the environment from nuclear radiation emitted by high-level radioactive waste. A stainless steel cylinder with a thickness of 1 mm to 1.5 mm, intended to contain radioactive waste, is placed within the silicon carbide canister. A 5 mm gap between the inner surface of the silicon carbide canister and the stainless steel cylinder is filled with boron carbide powder, thereby protecting the environment from nuclear radiation emitted by high-level radioactive waste. The silicon carbide canister is sealed with a lid made of silicon carbide using a reaction welding method. The metal foam used as the metal foam with an open porosity is selected from the group consisting of titanium, aluminum, and copper. The present invention can increase the strength of containers for solid radioactive waste.

The present invention relates to an all-solid-state battery comprising: a cathode; an anode including a porous composite anode current collector; and a solid electrolyte or separator positioned between the cathode and the anode, wherein the porous composite anode current collector includes a metal foam and a plated layer formed on the metal foam. The all-solid-state battery according to one aspect ensures excellent battery performance in terms of high energy density and lifespan characteristics while simultaneously achieving outstanding safety.

The invention discloses a protection device for electrical installation, and relates to the technical field of electrical equipment installation auxiliary devices, the protection device comprises a protection shell, heat continuously generated by a cable joint is absorbed through a heat conduction seat, graded heat dissipation action is triggered through the thermal driving characteristic of a shape memory alloy spring, when the temperature rises, a rotating plate turns over to form a directional air guide channel, and the heat dissipation effect is improved. Under the high-temperature extreme working condition, the self-adaptive structure further focuses the airflow, the metal foam and the phase-change material cooperatively cool the airflow, deep heat dissipation is achieved, heat is prevented from being accumulated in the protective shell and around the connector, the whole heat dissipation process does not need external energy, driving is completely depended on heat generated by the cable, and the service life of the cable is prolonged. And meanwhile, the rainproof and dustproof effects are guaranteed through the graded sealing design, the thermal aging speed of insulating glue, a heat-shrinkable sleeve and other insulating materials at the joint is effectively delayed, the insulating protection effect is enhanced, and the safety risk caused by high temperature is reduced.

Metal-foam mesh structures are used in a variety of applications where flexible mesh structures are utilized, such as steam chamber wicks and various diaphragms and energy electrodes. The new metal-foam mesh hybrid material has a three-dimensionally connected microporous structure and has improved mechanical properties, including good strength, ductility, flexibility, and other properties.

This application relates to the field of trace detection technology, and more specifically, to a method for detecting trace gaseous substances, a thermal desorption pre-concentrator, and its preparation method. The preparation method of the thermal desorption pre-concentrator includes: sequentially cleaning, acid-activating, drying, and cutting a metal foam sheet; immersing a metal foam substrate in an adhesive and then removing it; dispersing a particulate adsorbent phase on the surface of the metal foam substrate; guiding the particulate adsorbent phase into and adhering to the internal pore surface of the metal foam substrate through negative pressure filtration to obtain a metal foam substrate loaded with the particulate adsorbent phase; applying a DC voltage to the metal foam substrate loaded with the particulate adsorbent phase; placing the metal foam adsorbent in a housing with an airflow channel, and electrically connecting the metal foam adsorbent to a conductive electrode. This application is advantageous for achieving rapid and complete desorption of the target analyte, improving pre-concentration efficiency, and increasing detection response speed.

The invention relates to the technical field of trace detection, in particular to a trace gaseous substance detection method, a thermal desorption preconcentrator and a preparation method of the thermal desorption preconcentrator. The preparation method of the thermal desorption preconcentrator comprises the following steps: sequentially carrying out cleaning treatment, acid activation treatment, drying treatment and cutting treatment on a metal foam sheet; the method comprises the following steps: dipping a metal foam substrate in a binder, taking out the metal foam substrate, dispersing a granular adsorption phase on the surface of the metal foam substrate, and guiding the granular adsorption phase to enter and be attached to the internal pore surface of the metal foam substrate through negative pressure suction filtration, so as to obtain the metal foam substrate loaded with the granular adsorption phase; applying a direct current voltage to the metal foam substrate loaded with the granular adsorption phase; the metal foam adsorption body is arranged in the shell with the airflow channel, and the metal foam adsorption body is electrically connected with the conductive electrode. According to the invention, rapid and sufficient desorption of the target object is realized, and the pre-concentration efficiency and the detection response speed are improved.

A metal-foam structure is used to shield or reduce harmful electromagnetic waves that are generated by electronic devices. A metal-foam material has regulated pores and is incorporated in an electronic device. The metal foam structure shields, prevents, or reduces harmful electromagnetic waves generated by the electronic device from reaching the human body or interfering with a sensitive electronic component. This metal foam is a relatively lightweight material having regulated microscale pore structure. The pores in the metal foam can also form directionality relative to the direction of incoming electromagnetic waves for more effective reflection or absorption of electromagnetic waves. The metal foam can also be used as both an electromagnetic-shielding and a heat-dissipating component for electronics including popular consumer electronics such as mobile phones, notebooks, and high-power desktop computers.

The invention provides a method for optimizing a foam metal electrode of a hydrogen electrolysis cell, and belongs to the technical field of electrochemistry, the method comprises the following steps: material selection and structural design: task definition: selecting a proper foam metal material, such as nickel-based, iron-based or copper-based foam metal, according to the requirement of hydrogen production by electrolysis of water, and selecting a proper foam metal material, such as nickel-based, iron-based or copper-based foam metal, according to the requirement of hydrogen production by electrolysis of water; the materials need to have good conductivity and corrosion resistance; structural optimization: the pore structure of the foam metal electrode is designed, and an efficient electrocatalyst (such as platinum and iridium oxide) is loaded on the surface of the foam metal by adopting an electrodeposition, impregnation or chemical vapor deposition technology, so that the electrocatalytic activity of the electrode is remarkably improved, the overpotential of a hydrogen evolution reaction is reduced, the electrochemical reaction rate is further increased, the hydrogen production efficiency is improved, and the hydrogen production efficiency is improved. The catalyst deposition method ensures the uniformity and controllability of the catalyst layer, so that the electrochemical reaction is more efficient.

The present invention discloses a method for regulating SiC f The invention relates to a method for strengthening the toughness of heterogeneous brazing joints of SiC composite materials, which belongs to the field of brazing technology and adopts the structure of high entropy brazing material-metal foam-high entropy brazing material to strengthen the toughness of SiC composite materials. f / SiC composite heterogeneous joints are brazed; wherein the high-entropy brazing filler metal is composed of Co, V, Pd, Ta, and Cr, with the mass percentage of each element being 18-25%. By introducing a buffer metal foam and a dedicated high-entropy brazing filler metal to work synergistically, the present invention achieves a microstructure gradient effect based on secondary high-entropy treatment. The metal foam's inherent 3D structure exhibits a long-lasting mechanism throughout the entire welding process. The combination of the dedicated high-entropy brazing filler metal and the buffer metal foam results in a brazed joint with excellent microstructure, low residual stress, high strength, and good toughness, suitable for high-temperature service.

A capacitor and supercapacitor design are based on metal-foam electrodes. An electrolytic capacitor has a metal foam dielectric (e.g., aluminum oxide, titanium oxide, iron oxide, or others). An electric double-layer supercapacitor has an electrode with metal foam (e.g., copper, nickel, titanium, iron, steel alloy, or aluminum) filled with activated carbon, or graphene, or metal foam with activated carbon foam, or any combination of these to enhance the electrical conductivity and thus the power and capacity of the cell. A pseudocapacitor device has an electrode with metal foam (e.g., iron, cobalt, nickel, copper, titanium, aluminum, magnesium, tin, manganese, and stainless steel, and their alloy foams) coated with an oxide-or hydroxide-based material containing highly active zones. The pseudocapacitor metal-foam electrode can also be filled with activated carbon in the form of a slurry to further enhance its capacity.

The invention relates to a safety heat exchanger 1 with a first flow channel 2 for a first medium and with a second flow channel 3 for a second medium, wherein the two flow channels 2, 3 are separated from each other by a double wall 7, wherein the double wall 7 has a first wall 8 and a second wall 9 which define a leakage space 11 between them, wherein an open-pore metal foam 12 is arranged in the leakage space 11, which is in contact with both walls 8, 9.

The present invention relates to a method for preparing catalyst powder for electrolysis of aqueous ammonia, comprising the steps of: (A) immersing a metal foam support as a working electrode in an electrolyte solution containing a precursor of an active metal; (B) forming active metal crystal particles on the metal foam support by applying cyclic voltage and current, to form a metal foam-catalyst composite; and (C) physically pulverizing the metal foam-catalyst composite to form metal foam-catalyst composite powder.

An electrically energized renewable exhaust gas treatment device and a method for parking regeneration using the device. With the metal foam inner cylinder in the exhaust gas treatment device as the main component, supplemented by an electric heating component, it has fast heat conduction and avoids ablation caused by a sharp temperature rise. It can achieve a space utilization rate of 50%, ensure a soot particle capture efficiency of over 85%, and can use a volume of about 1.5L, which is about 10 times higher than that of ordinary DPF, preventing the situation of soot particle blockage. At the same time, the operation of the control electric heating wire is controlled by an electric control mechanism, and the electric control system is equipped with a digital display thermometer and a thermocouple, which can accurately control the temperature of the heating system, perform differential temperature rise and treatment, and the regeneration method is more flexible.

The application discloses a water-based foam extinguishing agent performance test integrated device and a test method, which comprises a foaming device, a glass foam pipe and a metal foam pipe arranged in the foaming device, an operation terminal and an air compression device connected with the foaming device; the upper part of the glass foam pipe is provided with an opening, the opening is connected with a foam tank through a pipeline, and a feeding pump and a valve F1 are further arranged between the foam tank and the opening; the upper part of the metal foam pipe is provided with a first opening and a second opening, the first opening is connected with the foam tank through a pipeline provided with a valve F3, and the foam in the foam tank flows into the glass foam pipe and the metal foam pipe through the valve F1 and the valve F3 respectively; and the second opening is connected with a foam gun through a pipeline. The application simplifies the test equipment, concentrates three foam performances (foaming, stable foaming and extinguishing performance) in one device, and can measure the foaming multiple, liquid separation time and extinguishing time and other parameters of the foam extinguishing agent in sequence through simple parameter setting and valve switching.

The invention provides a magnetocaloric module, a preparation method and a heat insulation demagnetization refrigeration device, the magnetocaloric module comprises a sleeve, an end cover and a heat transfer copper bar, the end cover and the heat transfer copper bar are arranged around the two sides of the sleeve respectively, the sleeve, the end cover and the heat transfer copper bar form a sealed cavity, and foam metal and magnetocaloric materials are distributed in the sealed cavity. Porous foam metal is used for replacing a traditional thermal bus structure, the typical specific surface area of a traditional thermal bus is 0.05 m < 2 > / g, the specific surface area of foam copper is greatly influenced by the structural size and can reach 1 m < 2 > / g partially, and the specific surface area of foam metal is larger than that of the traditional thermal bus, so that the specific surface area of the foam copper can be reduced on the premise of sacrificing the crystal quality as little as possible. And the heat exchange area between the magnetocaloric material and the heat transfer structure is increased, so that the heat transfer capacity between the crystal and the heat transfer structure is enhanced. Meanwhile, the manufacturing process of the foam metal is mature, and many commercial products exist. Compared with a traditional heat bus, the manufacturing time cost, the labor cost, the economic cost and the like can be saved.

A gas turbine engine includes a combustion chamber and groups of injectors for introducing a hydrogen and gas mixture into the combustion chamber. Each group of injectors includes radially inner, outer, and intermediate injectors, and each injector includes a hydrogen feed conduit that has an open-cell metallic foam disposed therein.

The present invention relates to a method for preparing a supported catalyst, comprising: providing a metal foam body A made of metallic cobalt, an alloy of nickel and cobalt, or an arrangement of superimposed layers of nickel and cobalt; applying an aluminum-containing powder MP to the metal foam body A to obtain a metal foam body AX; heat-treating the metal foam body AX to form an alloy between the metal foam body A and the aluminum-containing powder MP, thereby obtaining a metal foam body B; oxidatively treating the metal foam body B to obtain a metal foam body C; and applying a catalytically active layer comprising at least one support oxide and at least one catalytically active component to at least a portion of the surface of the metal foam body C to obtain a supported catalyst. The present invention also relates to a supported catalyst obtainable using this method and to the use of the supported catalyst in chemical conversions.

The invention discloses a battery pole piece and a preparation method thereof, and belongs to the technical field of batteries. Mixing and compacting metal powder and a pore-forming agent, and sintering at different temperatures in an inner layer and an outer layer to obtain a metal foam frame with different pores in the inner layer and the outer layer; performing hot-pressing compounding on the current collector base material and the metal foam frame, and controlling the porosity of one side of the metal foam frame close to the current collector to be high and the porosity of one side far away from the current collector to be low; and sequentially coating a composite conductive coating and an active material layer on one side, far away from the current collector, of the metal foam frame to obtain the battery pole piece with the optimized structure and process. According to the pole piece, collaborative optimization of volume expansion buffering, mechanical strength improvement and ion transmission efficiency enhancement is realized through gradient pore distribution design and a composite conductive coating process.

A power storage module (10) is provided with a plurality of power storage devices (20) and a case (30) that houses the plurality of power storage devices (20), the power storage devices (20) discharge internal gas toward one side in a first direction when an abnormality occurs, and a protection member (40) is provided on one side in the first direction of the power storage device (20) on one side in the first direction inside the case (30). A metal foam body (50) is provided on a surface of the protective member (40) facing the electricity storage device (20) in the first direction.