241 results about "Metal fiber" patented technology

The invention relates to the technical field of circuit boards, and discloses a circuit board interlayer connection detection method, device and equipment, and the method comprises the steps: carrying out the electrical characteristic parameter measurement of a multilayer flexible circuit board, and obtaining the characteristic parameter data of the circuit board; designing and arranging a multi-test-point detection structure on the multi-layer flexible circuit board, and performing signal excitation to obtain test point position information; applying a differential excitation signal, and collecting a differential response waveform between the test points to obtain a time domain reflection signal feature; impedance spectrum conversion and parameter extraction are carried out on the time domain reflection signal features, and an interlayer connection impedance distribution diagram is obtained; and establishing an interlayer connection defect characteristic model aiming at nickel-based alloy wire fracture, interface cracking and liquid metal fiber felt delamination in various bending states by utilizing the interlayer connection impedance distribution diagram, so that accurate classification of defect types and severity is realized, and interlayer connection faults and surface welding quality problems can be distinguished; and the misjudgment rate is greatly reduced.

The invention relates to a containment pressure suppression, filtration and discharge system and method and application thereof, and belongs to the field of special safety facilities and radiation protection of nuclear power devices. The containment pressure suppression, filtration and discharge system comprises a discharge valve (2), a discharge pipeline (3), a spray pipe (4), a pressure suppression pool, an expansion chamber (7), a steam-water separator (9), a metal fiber filter layer (10), a rupture disk (12), a heat exchanger and a valve. According to the containment pressure suppression filtering and discharging system, the seawater side heat exchanger and the pressure suppression pool heat exchanger are arranged, and a natural circulation loop is constructed by means of the potential difference between the seawater side heat exchanger and the pressure suppression pool heat exchanger and the temperature difference between seawater and a liquid phase in a pressure suppression pool under the accident condition; the heat of the suppression pool can be guided out without time limit under the condition of an LOCA accident or a main steam pipeline fracture accident in the containment; by adopting a pressure suppression washing method with multi-stage bubbling, rapid pressure suppression of the containment and efficient retention of airborne radioactive substances can be realized; occupation of total resources is reduced by arranging the combined metal fiber filter layer.

The invention discloses a non-metal composite hydrogen conveying hose with a multi-form hydrogen blocking layer. The non-metal composite hydrogen conveying hose comprises a non-metal inner pipe, a non-metal fiber reinforcement layer and a non-metal outer protection pipe which are sequentially arranged from inside to outside in a sleeving mode. The non-metal inner pipe sequentially comprises an organic hydrogen-resistant coating, a composite fiber lining pipe and a barrier layer from inside to outside; the non-metal fiber reinforced layer sequentially comprises a fiber pre-impregnated winding layer and a reinforcing rib layer from inside to outside; the non-metal inner pipe and the non-metal fiber reinforced layer are bonded with each other by adopting thermosetting polyurethane; the non-metal fiber reinforcement layer and the non-metal outer protection pipe are connected in a non-bonding mode. The non-metal composite hose has good hydrogen leakage prevention capacity and flexibility and can be used for high-pressure hydrogen conveying.

The invention relates to the technical field of flue gas denitration, and discloses an efficient dust and nitrate integrated SCR denitration system and method in a high-temperature and low-dust environment. A lower high-temperature dust removal unit containing a gradient three-dimensional porous metal fiber filtering element and an upper SCR denitration reactor located at the downstream of the lower high-temperature dust removal unit containing a multi-layer vanadium-titanium honeycomb type catalyst module are arranged in the upper SCR denitration reactor; the ammonia spraying module sprays ammonia to the upstream or the interior of the SCR reactor; and the intelligent control module controls the ammonia spraying and dust removal unit to remove dust, comprises a catalyst characteristic identification sub-module, a working condition disturbance prediction sub-module and a collaborative optimization control sub-module, and realizes an optimization decision of a final ammonia spraying instruction. High-temperature dust removal and SCR denitration are integrated in the integrated box body, so that the compactness of the system structure is realized; front efficient dust removal provides a clean flue gas environment for the catalyst, the service life of the catalyst is effectively prolonged, and the denitration efficiency is guaranteed; and the intelligent control module ensures the accuracy and self-adaption of ammonia spraying operation, and the removal rate of nitrogen oxides and the operation economy are remarkably improved.

The invention discloses a preparation method of a graphite composite bipolar plate, which comprises the processes of raw material homogenization, preheating treatment, hot press molding, demolding, stress relief and cutting and trimming, the raw material homogenization and stress relief processes can significantly improve the yield and product quality, and the problems of low yield, poor batch stability and the like in the prior art are solved; meanwhile, conductive fillers such as graphene, carbon fibers, carbon black, carbon nanotubes and metal fibers are introduced, so that a bridging effect among graphite particles is achieved, a conductive path is broken through, contact resistance is reduced, the overall conductivity of the bipolar plate is improved, the mechanical property of the material can be improved, and the service life of the bipolar plate is prolonged. Particularly, the bending strength is obviously improved; in addition, the method is simple in process, flexible to adjust, low in special equipment requirement, low in equipment investment and suitable for popularization.

The invention provides a method and device for preparing a composite board based on laser remelting and ultrasound, and relates to the technical field of composite board preparation. The method specifically comprises the steps that a molten pool is formed on a first metal plate to be compounded through laser remelting, a fiber laying manipulator control system is started, a fiber laying manipulator is made to lay carbon fibers into the molten pool according to a preset track of a laser remelting head, ultrasonic vibration is started at the same time, and a preformed composite plate is obtained; the molten pool on the preformed composite board is solidified through a temperature control system, ultrasonic vibration is started at the same time, and a metal / carbon fiber mechanical-metallurgical composite interface is formed; and a second metal plate to be compounded is compounded through roller pressure, and the metal / fiber / metal three-layer composite plate is obtained. The device comprises a laser remelting and fiber laying manipulator, a temperature control system and an ultrasonic vibration probe. According to the invention, laser remelting and ultrasonic vibration are combined to form a metal / carbon fiber mechanical-metallurgical composite interface, so that the interface strength of the composite board is enhanced, and the practicability of the composite board is improved.

The invention relates to a filter screen and a preparation method and application thereof, and belongs to the technical field of filtering equipment, the filter screen comprises a hydrophobic enhancement layer, a pre-filtering layer and a core filtering layer which are stacked in sequence; the hydrophobic reinforcing layer comprises the following components: metal fibers; the pre-filtering layer is prepared from the following components: basalt fibers; and the core filter layer comprises the following components: polytetrafluoroethylene fibers and polyether-ether-ketone fibers. By designing the structure of the filter screen, the filter screen which can stably work in a high-temperature environment, has excellent hydrophobic performance and filtering efficiency and is controllable in manufacturing cost is obtained.

The invention belongs to the technical field of thermal power heating surface treatment, and provides a gradient functional composite coating applied to a boiler heating surface and a preparation method of the gradient functional composite coating in order to solve the technical problems that an existing protective coating of the boiler heating surface is prone to abrasion and oxidation and high in cost. Collaborative design is formed, and gradient matching of mechanical properties and environmental failure resistance is achieved. The low-melting-point glass powder is combined with the rare earth catalytic effect, low-temperature ceramization is achieved, and thermal damage to a matrix is avoided. After the metal ceramic transition layer is sprayed, high-frequency induction remelting treatment is carried out, meanwhile, laser cladding is carried out on the surface of the ceramic surface layer, a nanocrystalline-amorphous composite structure is formed, and the bonding strength of the coating is improved.

The invention provides a fracture-resistant and tensile cement-based material based on a bionic structure and a preparation method thereof, and belongs to the field of building materials.The cement-based material comprises a plurality of cement-based slurry layers stacked layer by layer and fiber materials scattered in the cement-based slurry layers, the fiber material comprises at least one of steel fibers and non-metal fibers; the arrangement directions of the fiber materials in the same cement-based slurry layer are the same, and the projection included angle theta of the arrangement directions of the fiber materials in the adjacent cement-based slurry layers meets the following conditions that theta is larger than or equal to 30 degrees and larger than or equal to 0 degree or theta is larger than or equal to-30 degrees and smaller than or equal to 0 degree. According to the method, a discontinuous stacking structure simulating the nanoscale of a biological shell is applied to the structural design of a cement-based material, common Portland cement is adopted as a base material, discontinuous fibers are adopted as an auxiliary reinforcing material, and the bionic structure is formed through precise pouring forming; and the cement-based material has excellent mechanical properties such as ultrahigh pressure resistance, fracture resistance and tensile strength.

The utility model discloses an on-line ash removal device of an HCS efficient combustion burner, which comprises a base and a compressed air spray gun, a premixing chamber is arranged on the base, a metal fiber surface burner is arranged on the premixing chamber, a smoke exhaust cylinder is arranged on the metal fiber surface burner, an air delivery pipe is arranged on one side of the base, and an air outlet pipe is arranged on the other side of the base. A VOCs waste gas conveying pipe is arranged on the other side of the base, a combustion-supporting gas conveying pipe is arranged on the VOCs waste gas conveying pipe, a differential pressure monitoring device, a mounting rod and a control system are arranged on the outer side of the metal fiber surface combustor, a mounting block is arranged on the mounting rod, and a spray gun telescopic mechanism is arranged on one side of the mounting block. Through the arrangement of the differential pressure monitoring device, the spray gun telescopic mechanism, the compressed air spray gun and the control system, the structure can clean clogged ash or impurities on the metal fiber surface combustor according to needs, and the situation that normal operation of combustion is affected due to clogging of combustion capillary holes is avoided; and non-planned shutdown caused by shutdown maintenance or blockage of the device can be avoided.

The invention discloses a composite temporary plugging ball with strong erosion resistance. The composite temporary plugging ball comprises a ball core and a metal fiber coating layer coating the ball core. Compared with a common temporary plugging ball, the temporary plugging ball has higher erosion-resistant strength and plugging capacity, the inner-layer ball core is protected through rock chippings or proppant particles embedded in gaps of the outer-layer metal fiber coating layer, a subsequent proppant only polishes the particles embedded in the gaps of the metal fiber coating layer, and the particles are not prone to falling off along with aggravation of abrasion. Original particles are abraded and generate new gaps, new rock debris or proppant particles can be embedded into the new gaps, continuous protection of the temporary plugging ball is achieved, the influence of erosion of the temporary plugging ball on the temporary plugging effect is avoided, and meanwhile, the proppant can be gradually gathered at the gaps and self-accumulated to improve the plugging effect. The flow limiting effect and the exploitation efficiency can be effectively improved, all clusters of cracks can be evenly and effectively expanded, abrasion of a propping agent to the temporary plugging ball when the temporary plugging ball sets an irregular-shaped shot hole can be reduced, and the oil and gas exploitation efficiency is improved.

The invention discloses a crankshaft all-fiber bending and upsetting forming device and an upsetting method using the crankshaft all-fiber bending and upsetting forming device. The crankshaft all-fiber bending and upsetting forming device comprises a loading main machine structure and an upsetting structure. The loading main machine structure comprises a main machine top base, a main machine base, a movable cross beam and a movable workbench. The main machine base and the main machine top base form a vertically-layered loading structure through the machine body stand columns. The loading structure is used for mounting a composite cylinder body mechanism for upsetting driving and locking; a piston rod at the front end of the upsetting cylinder is connected with the movable cross beam to form a die assembly transmission structure; and a double-toggle-rod force amplifying mechanism is mounted in the movable cross beam. Carrying out upsetting operation loading treatment; carrying out positioning die assembly and die locking treatment on the forge piece; and the upsetting treatment is assisted by the double-toggle-rod force amplifying mechanism. According to the method, the application range is wide, high-precision one-time heating rapid upsetting forming can be conducted through the light bar blank, continuity and completeness of a crankshaft metal fiber flow line are reserved, the forge piece machining allowance is small, the metal utilization rate and the machining efficiency are improved, the crankshaft internal structure density is high, and the method can be used for upsetting blanks of shafts, flanges and other parts.

The invention provides a carbon fiber intramedullary nail and a preparation method thereof, and relates to the technical field of orthopedic implants, at least two layers of outer layer fibers are spirally wound around a central fiber to prepare a hybrid fiber composite rope strand; the hybrid fiber composite rope strands are axially loaded and twisted with the core mold as the center, a spiral carbon fiber prefabricated body is formed, and a mold is pre-buried in the carbon fiber prefabricated body to form screw holes; the carbon fiber prefabricated body is sequentially subjected to hot pressing, cooling and heat treatment, the carbon fiber intramedullary nail is obtained, and fibers of the hybrid fiber composite rope strand comprise polyaryletherketone resin fibers, carbon fibers and biodegradable metal fibers. The biodegradable metal fiber is used as a pore-forming fiber, a series of porous intramedullary nails with accurate pore size distribution can be obtained, and the porous intramedullary nails have the characteristics of cancellous bone-like hierarchical pore sizes while having high connectivity; by means of gradual degradation of the metal fibers in the body, the nail body is gradually transited from firm fixation to biological fixation, the human skeleton healing cycle is matched, and the purpose of precise healing is achieved.

The utility model relates to the technical field of ceramic composite boards, in particular to a wear-resistant ceramic composite board which comprises a protective surrounding edge, a mounting structure is arranged on the inner side of the protective surrounding edge, wear-resistant assemblies are arranged in the mounting structure, and anti-seismic mechanisms and protective assemblies are arranged on the inner sides of the wear-resistant assemblies on the upper side and the lower side. The protection assembly is located on the inner side of the anti-seismic mechanism. According to the utility model, the protection assembly is arranged, when the protection assembly is used, the protection assembly is composed of a resin layer, a metal fiber layer, a waterproof layer, a heat preservation layer, a sound insulation plate and a shaping honeycomb plate, and the metal fiber layer is arranged in a crossed manner, so that the strength and the toughness of the assembly are enhanced, and excellent impact resistance and wear resistance are ensured in the use process; the arrangement of the waterproof layer and the heat preservation layer not only improves the waterproof and heat preservation performance of the assembly, but also effectively prevents the damage caused by damp and temperature change of the internal structure, thereby prolonging the service life, and the application of the sound insulation plate effectively weakens the external noise.

The invention discloses a temperature-resistant heat-insulation sealing metal-rubber composite material which comprises a metal phase, a rubber phase and a binder, the preparation method of the temperature-resistant heat-insulation sealing metal rubber composite material comprises the following steps: step 1, sintering and molding metal fibers to obtain a three-dimensional porous metal framework; 2, fluororubber and silicone rubber are added into an internal mixer to be blended, then hollow glass beads and carbon black are sequentially added, the mixture is mixed to be uniform, and rubber mixed rubber is prepared; 3, the surface of the metal framework is coated with a binding agent, the binding agent is covered with the rubber compound, and the whole material is placed in a vulcanizing machine to be vulcanized; and 4, integrally transferring the vulcanized material into a drying oven for secondary vulcanization, and cooling to obtain a composite material finished product. The composite material is applied to the field of space flight and aviation. The invention aims to solve the problems of narrow temperature resistance range, non-ideal heat insulation effect and obvious reduction of high-temperature mechanical properties of the existing material, so as to meet the use requirements of aerospace equipment in a complex thermal coupling environment.

The invention discloses a sintering method of a stainless steel fiber felt. The method specifically comprises the following steps: S1, stacking at least one stainless steel fiber to form a stainless steel fiber felt blank with a gradient composite structure; s2, the stainless steel fiber felt blank is placed in an oxygen-containing atmosphere to be subjected to pre-oxidation treatment, and a stainless steel fiber felt blank loaded with a Cr2O3 / Fe2O3 composite oxide layer is obtained; and S3, the stainless steel fiber felt blank loaded with the Cr2O3 / Fe2O3 composite oxide layer is subjected to reduction sintering treatment, and the stainless steel fiber felt is obtained. The stainless steel metal fiber felt is sintered through an oxidation-reduction two-step method, the tensile strength and elongation of the stainless steel metal fiber felt can be improved, and the industrial problems that the low-temperature sintering binding force of superfine fibers (the diameter is smaller than 2 micrometers) is poor, the high-temperature sintering neck is abnormally large, and an effective binding interface is difficult to form can be solved.

Protected lithium electrode structure (1) for a lithium-air battery, comprising: a negative electrode current collector (3); a negative electrode active material layer (5) made of a lithium metal, a mainly lithium-containing alloy or a mainly lithium-containing compound, and stacked on the negative electrode current collector (3); and a separator (7) which is stacked on the negative electrode active material layer (5), wherein the negative electrode active material layer (5) is sealed by connecting the separator (7) and the negative electrode current collector (3) around the negative electrode active material layer (5), the separator (7) being bonded to the negative electrode current collector (3) at a circumferential edge section of the separator (7), and the negative electrode active material layer (5) being stacked onto a surface of the negative electrode current collector (3) to cover an area smaller than the area of ​​the negative electrode current collector (3), and a trapping layer (11) for finely powdered lithium, which is arranged between the negative electrode active material layer (5) and the separator (7) and has electrical conductivity via a bond on one side of the trapping layer (11) for finely powdered lithium, wherein the trapping layer (11) for finely powdered lithium is a conductive foam or a structure made of metal fiber and traps finely powdered lithium metal that is generated during charging and discharging.

This invention provides a hydrophilic-hydrophobic composite felt, its preparation method, and its application. The preparation method includes the following steps: mixing, spraying, and stacking fibers of different thicknesses, followed by sintering to obtain a metal fiber felt with a small inner pore size and a large outer pore size; etching and modifying the metal fiber felt to obtain a superhydrophilic metal fiber felt; and performing chemical vapor deposition on the surface of the superhydrophilic metal fiber felt to obtain a hydrophilic-hydrophobic composite felt. The hydrophilic-hydrophobic composite felt comprises a first hydrophobic outer layer, a hydrophilic inner layer, and a second hydrophobic outer layer, which are sequentially adjacent. It has a high processing throughput and good demulsification effect, and can be applied to emulsions of different properties. At the same time, the preparation method is simple to operate, low in cost, and easy to scale up for production.

A fully premixed combustion low-nitrogen steam boiler relates to the technical field of steam boilers and comprises a box body and a plurality of standardized boiler modules sequentially arranged along a mounting cavity of the box body. The boiler module is composed of a boiler body, a full premixing burner, a negative pressure steam pocket and a symmetrical tubular heat exchanger. Spiral grooves are formed in the walls of the furnace body combustion cavities and communicated with the water heating cavities, so that water flow forms a thin-layer water film to strengthen heat exchange and prevent local dry burning, and the adjacent furnace body combustion cavities are communicated to realize smoke cascade transmission; hot air flow spirally circulates to prolong the heat exchange time, the full-premixing combustor is combined with the impeller to diffuse fuel gas, the metal fiber net forms low-temperature diffusion flames, and generation of nitric oxide is remarkably inhibited; the negative-pressure steam pocket accelerates evaporation in a negative-pressure environment, so that the steam production rate is increased; flue gas forms a U-shaped loop through the flow guide structure and flows through the tubular heat exchanger. The modular design supports on-demand combination and later expansion, the overall structure is high in heat efficiency, low in emission and safe and reliable in operation, and the multi-working-condition load requirement is met.

A total primary combustion burner which includes a burner body 1 with an air-fuel mixture chamber 11 into which an air-fuel mixture of a fuel gas and primary air is supplied, a combustion plate portion 2 covering an opening surface 12, which faces the air-fuel mixture chamber, of the burner body, and a backfire suppressing plate portion 3 disposed opposite the combustion plate portion with a gap inside the air-fuel mixture chamber. The air-fuel mixture passing through the backfire suppressing plate portion ejects from the combustion plate portion and undergoes combustion. The total primary combustion burner is configured so that backfire can be suppressed as much as possible while suppressing pressure loss, even when using hydrogen as the fuel gas. The backfire suppressing plate portion has a sintered sheet 33, 5 made by sintering an aggregate of metallic fibers or beads.

The invention discloses a super-oleophylic metal-based molecularly imprinted adsorption coalescence material and a preparation method and application thereof.The super-oleophylic metal-based molecularly imprinted adsorption coalescence material is prepared by taking a metal fibrofelt as a substrate material, performing acidification pretreatment with mixed acid, adding a cross-linking agent, and utilizing the high adhesion characteristic of the cross-linking agent to prepare the super-oleophylic metal-based molecularly imprinted adsorption coalescence material. And forming an oil molecule selective surface coating on the imprinted surface modified material at a certain heating temperature and time by utilizing a hydrothermal reaction, so as to obtain the super-oleophylic and hydrophobic metal-based molecularly imprinted oil removal material. The preparation process is simple, the mechanical strength is high, the service life is long, the manufacturing cost is low, the recyclability is high, and secondary pollution is not generated in the using process; the material has specific recognition of a molecularly imprinted material on oil molecules, high-selectivity adsorption treatment on small-particle-size oil molecules such as dissolved oil can be realized, and the oil removal effect is far better than that of other oil removal materials.

A high-power surface combustion system suitable for treating high-concentration organic waste gas, comprising a gridded surface burner assembly, an organic waste gas valve group, a combustion-supporting gas valve group, an air distribution system, an igniter module, an exhaust module, and a waste heat recovery module; wherein the gridded surface burner assembly is an integrated burner composed of a segmented metal fiber head and a corresponding segmented premixing chamber; the organic waste gas valve group, the combustion-supporting gas valve group, and the air distribution system are respectively connected to the gas mixing chamber of the surface burner, and the organic waste gas, combustion-supporting gas, and air are mixed and transported to the surface burner for incineration, and the igniter module is arranged in a certain area above the surface burner; the exhaust module is configured on the periphery of the gridded surface burner assembly, and a waste heat recovery module is arranged inside the exhaust module, ultimately achieving standard emission of organic waste gas.

The present invention provides a press laminate for reducing manufacturing cost and manufacturing a metal-fiber reinforced resin composite molded product with high precision and in a short time, and a post-press laminate obtained by press molding the press laminate. The press laminate includes: a first fiber reinforced resin prepreg layer; a resin foam layer disposed on the first fiber reinforced resin prepreg; a metal layer disposed on the resin foam layer, composed of a punched metal; and a second fiber reinforced resin prepreg layer disposed on the metal layer.

The utility model provides a low-carbon low-nitrogen ammonia gas type burner which comprises a burner body, an oxygen gas injection unit and an ammonia gas injection unit. The oxygen injection unit comprises an oxygen inlet, an oxygen cavity, an oxygen injection pipe and an oxygen injection pipe connecting plate; the oxygen inlet is connected with an oxygen generating device through a pipeline; an oxygen precision regulating valve and an oxygen flow meter are mounted on the pipeline; the ammonia gas spraying unit comprises an ammonia gas inlet, an ammonia gas cavity, an ammonia gas spraying pipe, an ammonia gas spraying pipe connecting plate and an ammonia gas cavity connecting plate; the ammonia gas inlet is connected with an ammonia gas generating device through a pipeline; and an ammonia gas precision regulating valve and an ammonia gas flow meter are mounted on the pipeline. Oxygen and ammonia gas are distributed through a plurality of small spray pipes, so that the oxygen and the ammonia gas can be uniformly premixed, and hidden dangers possibly existing due to the fact that mixed gas stays in a large cavity for a long time are avoided; meanwhile, compared with a premixed metal fiber felt which is commonly used in the market and made of iron-chromium-aluminum alloy, the air-equalizing and fire-retarding device made of the porous medium has higher fire resistance.

The application relates to a filter screen and a preparation method and application thereof, and belongs to the technical field of filtering equipment. The filter screen comprises a hydrophobic reinforcing layer, a pre-filtering layer and a core filtering layer which are sequentially stacked; the hydrophobic reinforcing layer is composed of metal fibers; the pre-filtering layer is composed of basalt fibers; and the core filtering layer is composed of polytetrafluoroethylene fibers and polyether ether ketone fibers. The filter screen can stably work in a high-temperature environment, has excellent hydrophobic performance, high filtering efficiency and controllable manufacturing cost through the design of the structure of the filter screen.

The present invention discloses a low-friction synthetic brake shoe in the field of brake shoes and a preparation method thereof. By weight, the preparation raw materials include: 25-30 parts of cashew shell oil modified phenolic resin, 8-12 parts of nitrile rubber, 18-25 parts of metal fiber composite, 15-20 parts of flake graphite, 14-18 parts of sepiolite fiber, 6-8 parts of molybdenum disulfide, 4-6 parts of silicon carbide, 3-5 parts of talcum powder, and 1-3 parts of epoxy soybean oil; wherein, the metal fiber composite is obtained by first arranging two metal fibers with different linear thermal expansion coefficients side by side and fusing the endpoints, and then coating a boron nitride silicone rubber buffer layer on the surface. The present invention uses cashew shell oil modified phenolic resin and replaces conventional metal reinforcing fibers with metal fiber composites, which can delay the initiation and propagation of brake shoe cracks, weaken the unidirectional tensile or shear stress caused by external loads, improve the overall toughness of the brake shoe, and improve the high-temperature friction performance of the brake shoe.

To provide an explosion-proof panel composed of a cured body of a cement composition having high compressive strength and excellent impact resistance, and to provide a method for producing the explosion-proof panel.SOLUTION: An explosion-proof panel 1 is composed of a cured body of a cement composition, wherein: the cement composition comprises cement, silica fume having a BET specific surface area of 15 to 25 m2 / g, an inorganic powder having a 50% cumulative particle diameter of 0.8 to 5 μm, an aggregate A having a maximum particle diameter of 1.2 mm or less, heat-resistant foamed beads having an average particle diameter of 1.5 to 4.5 mm, a high-range water-reducing agent, a defoaming agent, metal fibers, and water; in 100 vol% of the total amount of the cement, the silica fume, and the inorganic powder, a ratio of the cement is 55 to 65 vol%, a ratio of the silica fume is 5 to 25 vol%, and a ratio of the inorganic powder is 15 to 35 vol%; and a ratio of the heat-resistant foamed beads in the cement composition is 7.0 to 27.0 vol%.SELECTED DRAWING: Figure 1

To provide a friction couple having an enhanced effect and stability in a low speed range, where the friction couple has a disc brake pad having a friction material manufactured from a friction material composition having a binder, a fiber base, and a friction modifier, without containing a copper component and a ferrous metallic fiber, and a stainless steel disc rotor. The present invention uses a friction material composition containing 20-30 weight % of a titanate relative to an entire friction material composition as an inorganic friction modifier without containing an inorganic friction modifier that has a Mohs hardness of 4 or less and is cleavable. The above-explained titanate is preferably a layer crystal structure lithium potassium titanate.

PROBLEM TO BE SOLVED: To provide a structure for an automobile enhanced in the adhesiveness of a metal layer and a fiber reinforced resin layer in a case that the structure for the automobile is constituted of a metal / fiber reinforced resin composite material and capable of keeping excellent characteristics as a whole. SOLUTION: In the structure for the automobile constituted of the metal / fiber reinforced resin composite material obtained by integrally bonding the metal layer and the fiber reinforced resin layer through an intermediate resin layer, the intermediate resin layer contains particles with an average particle size of 3-10 μm comprising a thermoplastic resin and an imidazolesilane compound.