15322 results about "Powder" patented technology

The invention relates to the technical field of process optimization, and discloses an optimization method and system for a graphite sagger compression molding process. The method comprises the following steps: determining and analyzing particle size distribution, specific surface area, porosity and viscosity-temperature characteristics of graphite powder and a binder to obtain raw material characteristic parameter data; modeling is conducted on the migration behavior of the binder and the deformation characteristic of the graphite powder in the pressing process, a material rheological model is obtained, meanwhile, a multi-point pressure sensor system is arranged on the surface of a pressing mold, and target pressure data are collected; constructing a pressure distribution feature vector and a material flow state prediction result; performing adaptive adjustment on the initial pressing parameters to obtain a segmented pressure curve and a local pressure compensation strategy; and performing multi-objective optimization on the graphite sagger pressing path to obtain an optimal pressing process parameter combination. The method is combined with material flow state prediction, accurate control over the pressing process is achieved, and the intelligent level of the graphite sagger pressing forming technology is improved.

The invention discloses an intelligent regulation and control method applied to cement grinding particle gradation, and relates to the technical field of cement grinding control, and the method comprises the following steps: S1, collecting grinding system operation parameters in real time, including mill current, powder concentrator rotating speed, feeding amount, grinding sound signals and online particle size detection data; s2, calculating core characteristic parameters based on the operation parameters, wherein the core characteristic parameters comprise an effective crushing power index, a dynamic fine powder retention rate and an in-mill material filling state index; s3, inputting the core characteristic parameters into a grading prediction model, and outputting predicted particle size distribution; s4, generating an adjustment instruction through a hierarchical control strategy based on the predicted particle size distribution; and S5, outputting the adjustment instruction to an execution mechanism. The particle size distribution is accurately predicted by collecting and analyzing the operation parameters of the grinding system in real time and combining core characteristic parameters, closed-loop intelligent regulation and control are achieved, the grinding efficiency, stability and product quality are improved, and meanwhile the control precision is optimized.

The invention belongs to the technical field of soft magnetic materials, and discloses an amorphous nanocrystalline soft magnetic material with high saturation flux density and a preparation method thereof. The preparation method comprises the following steps that an iron-based amorphous strip is crushed into flat powder with the thickness being 5-25 microns and the diameter being 30-80 microns, and scaly amorphous soft magnetic powder is obtained; the method comprises the following steps: performing insulation coating treatment on spherical iron-silicon soft magnetic powder with the average particle size of 2-20 microns to obtain insulation coating modified spherical magnetic powder; and mixing the obtained scaly amorphous soft magnetic powder, the insulating coated modified spherical magnetic powder and bonding resin, performing compression molding, performing annealing crystallization treatment at the temperature of 450-550 DEG C, and then raising the temperature to 600-900 DEG C for sintering treatment to obtain a finished product. According to the amorphous nanocrystalline soft magnetic material and the preparation method thereof, the spherical iron-silicon soft magnetic powder modified through insulation coating is compounded with the scaly amorphous soft magnetic powder, and low loss is maintained while the obtained amorphous nanocrystalline soft magnetic material Bs is remarkably improved.

The invention provides a self-leveling rapid repair mortar based on a steel slag solid waste cementing material and a preparation method thereof, the self-leveling rapid repair mortar comprises the following components in parts by mass: 100 parts of a self-leveling rapid repair mortar cementing material: 20-32 parts of steel slag powder, 20-30 parts of slag powder, 10-23 parts of raw ash, 10-15 parts of desulfurized gypsum, 5-8 parts of silica fume, and 8-25 parts of rapid hardening sulphoaluminate cement; the fine aggregate comprises 50 parts of quartz sand and 50 parts of steel slag aggregate; 0.3 to 0.7 part of a polyether defoaming agent, 0.05 to 0.25 part of lithium carbonate and 6 to 12 parts of a polycarboxylic acid water reducing agent; and 25-28 parts of water. According to the self-leveling rapid repair mortar based on the steel slag solid waste cementing material, on the basis of an alkali excitation synergistic sulfate excitation mechanism, the solid waste materials such as the steel slag powder, the slag powder, the raw ash and the desulfurized gypsum are utilized, and through proportioning optimization, the self-leveling rapid repair mortar which can open traffic within 2 hours and has the compressive strength gt within 28 days is prepared; the bonding strength is gt; the self-leveling mortar for rapidly repairing the cement concrete pavement has the advantages of self-leveling, no shrinkage of later strength and excellent durability.

The invention provides a system for space heterostructure material additive manufacturing, and aims to solve the problems of heterogeneous powder pollution and recovery, space heterostructure deposition workpiece precision optimization, defect control and the like in the prior art. The system comprises a device shell, a heterogeneous powder feeding and recycling device, an additive rolling cooperation platform, an ultrasonic vibration clamping platform and a powder screening and collecting device. The heterogeneous powder feeding and recycling device controls a rotating round block and a tapping sliding block to move through a servo driving mechanism to achieve switching and recycling of heterogeneous powder and cleaning work of a powder feeding path. The material adding and rolling cooperation platform integrates a 3D material adding mechanism, a powder cleaning mechanism and a rolling mechanism, the angle of a nozzle is adjusted by driving a bevel gear transmission assembly, cleaning of residual powder on the deposition surface under different defocusing amounts is achieved, and the material adding and rolling cooperation platform cooperates with the rolling mechanism to flatten the deposition surface. The ultrasonic vibration clamping platform improves the deposition quality of the laser directed energy deposition (LDED) spatial heterostructure through precise clamping and ultrasonic vibration.

The invention discloses an additive manufacturing parameter optimization method using machine learning. The method comprises the following steps: acquiring a first cladding layer surface topography constructed by powder layers with different powder characteristics under different powder laying parameters, and establishing a first database at least mapping a relationship among the powder laying parameters, the powder characteristics and the first cladding layer surface topography; and according to the first database, a first machine learning model is constructed and trained to generate a first application model used for powder laying parameter prediction, and then the first application model is used for predicting input powder characteristics to output optimal powder laying parameters used for additive manufacturing so as to optimize the additive manufacturing quality.

The invention discloses a reaction-sintered silicon carbide setter plate and a preparation method thereof. The reaction-sintered silicon carbide setter plate product is obtained through powder granulation, compaction and reaction sintering. Wherein the silicon carbide powder of the four particle size sections is matched, the particle size sections are uniform, stacking is more reasonable, coarse particles form a frame, fine particles are filled among the coarse particles, the powder structure is compact in property, and the compactness of a green body obtained after blank pressing is guaranteed; and spray granulation is performed after ball milling, so that all the raw materials and auxiliary materials are uniformly mixed. The surface of the green body pressed by a set oil pressure mold is also provided with a concave-convex structure, so that the contact area between the load bearing plate and the bottom of the domestic porcelain is reduced, air circulation between the load bearing plate and the bottom of the domestic porcelain is increased, and adhesion is effectively avoided. The product has the advantages of long service life, high strength and fast heat conduction, solves the problems of low strength, low heat conductivity and short service life of mullite, and also solves the industrial pain point of adhesion of a reaction-sintered silicon carbide setter plate.

The invention discloses crack-chloride ion double-triggered subsea tunnel corrosion-resistant concrete and a preparation method thereof, and relates to the field of subsea tunnel engineering materials. The concrete is prepared from the following components in parts by weight: 400 to 500 parts of Portland cement, 50 to 80 parts of fly ash, 60 to 100 parts of superfine mineral powder, 1000 to 1100 parts of coarse aggregate, 700 to 800 parts of fine aggregate, 140 to 160 parts of water, 10 to 20 parts of self-repairing microcapsules and 1 to 5 parts of a water reducing agent, the self-repairing microcapsule comprises a capsule wall material, a self-repairing material and a layered dihydroxyl composite metal oxide. A crack-chloride ion double-response system is constructed, and the limitation of traditional single trigger repair is broken through. When a crack with a certain width appears in the concrete, the capsule wall of the self-repairing microcapsule is broken to release the repairing component, so that effective filling of the crack is realized; and meanwhile, the layered double-metal hydroxide can directionally adsorb chloride ions to form a stable compound, so that the migration rate of the chloride ions is remarkably reduced.

The invention relates to the technical field of powder concentrator control, in particular to an unpowered powder concentrator air volume control method and system, which reduce the time and frequency of shutdown adjustment, improve the continuity and stability of a production line and finally improve the overall production efficiency through real-time and dynamic control. The method comprises the following steps: collecting a plurality of material grading samples obtained by grading and powder selecting of an unpowered powder selecting machine; based on preset material grading target features, target deviation feature extraction is carried out on each material grading sample, and a material grading deviation vector corresponding to the collection time is obtained; obtaining material grading deviation vectors at a plurality of collection times, and arranging the material grading deviation vectors according to a time sequence to obtain a material grading deviation matrix; and inputting the material grading deviation matrix into a pre-constructed powder concentrator grading precision evaluation model to obtain a material grading precision index corresponding to the unpowered powder concentrator.

The invention provides an automobile brake caliper manufacturing method based on a selective laser melting additive manufacturing technology, which comprises the following steps: carrying out structural region division on a three-dimensional digital model, and formulating an SLM process parameter strategy of a structural region, the SLM process parameter strategy comprising adjustment of laser power, scanning speed, scanning spacing and powder layer thickness; according to a three-dimensional digital model of the brake calipers and an SLM process parameter strategy, additive powder is laid in a powder bed of SLM equipment, the surface of the powder bed is scanned layer by layer through high-power-density laser beams, powder particles are selectively melted, laser energy density input is controlled, thermophysical characteristics of powder materials are matched, microstructure evolution is controlled, and the brake calipers are manufactured. And after one layer is melted and solidified, the powder bed descends by the height of one layer thickness, a new powder layer is spread out, the process is circulated till additive manufacturing of the brake calipers is completed, and the effects of being light in weight, high in structural strength and good in heat dissipation effect are achieved.

The invention provides a data correction method and system combined with lattice structure additive manufacturing process characteristics, and the method comprises the steps: firstly employing a Newton iteration method, taking the radius of a pillar as a variable, optimizing the relative density of an iteration target and generating a lattice structure geometric model under the condition that a process constraint condition is satisfied, and extracting actual geometric parameters after forming through CT scanning, the elastic modulus is corrected through the pillar diameter deviation and the defect volume fraction, a compression failure mechanism is combined, a density-related failure criterion is introduced, a nonlinear relation with the relative density is constructed through specific energy absorption data, material plasticity parameters are inversely optimized, and a defect coupling evaluation model is constructed according to the surface powder sticking rate and the pillar diameter deviation. And establishing a Gaussian mixture model based on a stress-strain curve to screen out abnormal data, and finally fusing the parameters to construct a data correction model. The dot matrix structure design precision can be improved, and then a high-quality data basis is provided for performance prediction-structure design two-way feedback.

The invention discloses a preparation method of high-polarization bismuth ferrite-lead titanate-barium zirconate titanate-based ferroelectric ceramic, which comprises the following steps: preparing oxide raw materials according to the chemical formula of the bismuth ferrite-barium titanate ceramic-based ferroelectric ceramic, mixing to obtain mixed powder, pre-sintering the mixed powder to obtain pre-sintered powder, granulating the pre-sintered powder to obtain granules, and sintering the granules to obtain the high-polarization bismuth ferrite-lead titanate-barium zirconate titanate-based ferroelectric ceramic. Performing compression molding on the granules to obtain a green body, performing degumming sintering on the green body to obtain sintered ceramic, and performing annealing treatment on the sintered ceramic to obtain the bismuth ferrite-lead titanate-barium zirconate titanate based ferroelectric ceramic. According to the invention, annealing treatment is carried out on sintered ceramic, after annealing treatment, defect dipoles generated by volatilization of Pb and Bi in the ceramic are rearranged under the action of a temperature field, relaxor ferroelectric-ferroelectric phase change occurs in a ceramic phase, a ferroelectric hysteresis loop reflects that the girdling of the loop is opened, and the rectangularity is increased; a bipolar strain curve is converted into a typical butterfly shape of ferroelectric from a bud shape, and the ferroelectricity of the ceramic is further greatly improved.

The invention relates to the technical field of building materials, in particular to a Yellow River superfine sand aggregate interface reinforcing agent and a preparation and use method thereof.The interface reinforcing agent is prepared from 0.05-0.1 part of graphene oxide powder, 50-100 parts of a silane coupling agent, 50-100 parts of nano-silicon dioxide, 10-30 parts of oxalic acid and 5000-7000 parts of water; graphene oxide powder, a silane coupling agent and nano silicon dioxide are jointly used for preparing an interface modifier for performing interface modification treatment on the Yellow River superfine sand, so that the interface bonding force between the Yellow River superfine sand and a cement hydration product is enhanced.

The invention relates to the technical field of filling materials, and particularly discloses an ardealite-based high-strength anti-seepage filling material and a preparation process thereof, the ardealite-based high-strength anti-seepage filling material comprises 50%-65% of pretreated ardealite, 15%-25% of Portland cement, 5%-15% of superfine slag powder, 5%-10% of electrolytic manganese residues, 5%-8% of silica fume, 3%-6% of metakaolin, 2%-4% of a composite alkali activator and 0.5%-1.2% of a polycarboxylic acid water reducer, 0.3%-0.8% of an organic silicon water repellent and 0.05%-0.1% of cellulose ether; according to the invention, through chemical reaction of Mn < 2 + > in the electrolytic manganese residue and SO4 < 2-> in the phosphogypsum, micron-sized manganite crystals (MnAl2 (SO4) 4. 22H2O) are generated to actively fill internal micro-cracks of the material, so that a filling body is endowed with a self-repairing function and the impermeability is improved, and a composite alkali activator composed of NaOH and water glass is used for synergistically activating potential gelling activity of the superfine slag powder and the silica fume, so that the self-repairing filling material is prepared. And the formation of hydration products is accelerated, and 0.3-0.5 T of pulsed magnetic field is applied in the stirring process, so that the manganite crystals are guided to orderly grow along the expected stress direction of the filling body, and the compressive strength is improved.

The invention discloses a method for preparing asphalt-based porous carbon based on an MgO template, and belongs to the technical field of porous carbon, nano MgO and deionized water are mixed and placed in a synthesis kettle, hydrothermal synthesis is performed at 180 DEG C for 2 h, suction filtration and drying are performed, a dried filter cake is crushed and calcined, and porous flaky MgO is obtained; adding the asphalt solution into the MgO suspension, stirring, drying to obtain brown powder, transferring the brown powder into a corundum crucible, putting the corundum crucible into a tubular furnace, calcining to obtain a carbonized C / MgO composite material, and washing the carbonized C / MgO composite material with a diluted hydrochloric acid solution and deionized water to obtain a carbon material sample recorded as AC-75. Pouring the porous carbon material PCs and KOH into a mortar, fully grinding, mixing and calcining to obtain an activated product, pickling and washing the product to be neutral, and drying to obtain the porous carbon material PCs. The raw materials selected by the method are asphalt and flake magnesium oxide which are stable in performance, low in price, large in amount and easy to obtain, a magnesium source can be recycled, environmental protection is achieved, and resources are saved.

The invention discloses a high-strength and high-toughness aluminum nitride ceramic and a preparation method thereof, and relates to the technical field of ceramics, a sol-gel method is adopted to coat the surface of aluminum nitride with a stable shell layer to form a core-shell structure, meanwhile, the low lattice mismatch rate of a core-shell interface is utilized to reduce thermal resistance, and toughness and thermal conductivity are both considered; according to the external magnetic field tape casting method, the magnetic dipole moment orientation principle is utilized, an external magnetic field is applied in the tape casting stage, the in-plane mechanical property is improved, and the fracture toughness is improved through the magnetism of aluminum nitride whiskers; a reinforcement is introduced to improve the mechanical property and corrosion resistance of the aluminum nitride ceramic material, multi-granularity powder is compounded, large-particle aluminum nitride powder is used as a sintering and heat-conducting framework material, and high activity provided by submicron particles is utilized to promote sintering, so that the sintering temperature of aluminum nitride can be remarkably reduced, and the performance is greatly improved; and the aluminum nitride substrate expands more application fields on a future packaging circuit.

The invention relates to a preparation method and application of high-compaction-density composite sodium ferric phosphate. The preparation method comprises the following steps: weighing a sodium source, an iron source and a phosphorus source according to a stoichiometric ratio of [xNa + (a-x) A]: [yFe + (b-y) B]: P = a: b: (c + 2), mixing and dispersing the iron source, the sodium source, the phosphorus source and a chelating agent into pure water, reacting for a period of time at a certain temperature, transferring into a sand mill for grinding, adding a dispersing agent, cane sugar, the dopants A and B, and obtaining slurry F after grinding; and carrying out spray drying on the slurry F to obtain powder K. The powder K is transferred to a tubular furnace, and the oxygen content is 1t under the N2 protective atmosphere; and calcining at the temperature of 450-600 DEG C under the pressure of 50 ppm, and then carrying out air jet pulverization to obtain sodium ferric pyrophosphate positive electrode material powder with high compaction density and a molecular formula of (NaxAa-x) (FeyBb-y) (PO4) cP2O7. When the product is used, the compaction density is high, the dynamic performance of the material is enhanced, the thermal stability and chemical stability of the material are improved, and the electrochemical performance is good.

A feeder system includes a donut-ring-shaped first wheel having a first groove recessed below its top surface, with a first hopper positioned above to receive material. A first conduit connects the hopper bottom to the groove, defining a feeding path. A mixer unit receives materials, connected to the first groove via a first suction head. A first motor rotates the first wheel, transferring material from hopper to groove to mixer unit. A donut-ring-shaped second wheel includes a second groove, second hopper, and second conduit. A second suction head connects this groove to the mixer unit, while a second motor enables wheel rotation for material transfer. The mixer unit combines both materials. The feeder system implements coaxial wheel arrangement with independent material flow control, enabling independent powder delivery for additive manufacturing applications.

The invention discloses an intelligent fluidized bed jet mill, and relates to the technical field of material crushing and grading equipment. The equipment comprises a hardware part and a control module, wherein the hardware part consists of a crushing area, a feeding area and a grading area. Low-temperature and high-pressure nozzles uniformly distributed on an annular gas distribution disc are adopted in the crushing area; the grading area is provided with a flow dividing cylinder and a conical flow guide plate for separating ascending airflow and falling coarse particles; the control module collects particle size data of powder in real time, predicts future particle size distribution in combination with an LSTM network, dynamically optimizes the rotating speed of a grading impeller through a particle swarm algorithm, and achieves cooperative control over smashing efficiency, particle size precision and energy consumption with the effective output per unit energy consumption as the optimization target. Through low-temperature embrittlement, an anti-pollution structure and an intelligent algorithm, the problems that traditional equipment is high in energy consumption, extensive in particle size control and prone to contaminating materials are solved, and the device is suitable for fine smashing of high-purity or high-hardness materials.

The invention discloses a multi-flame powder combustion eruption device. The multi-flame powder combustion eruption device is characterized in that a quantitative blanking powder bin is communicated with an eruption pipe through a pneumatic pipeline; the spraying pipe is provided with a spraying guide cavity, the plasma generator discharges gas in the spraying guide cavity to form a plasma arc area, and the plasma arc area and the cavity wall of the spraying guide cavity have a distance which enables the plasma arc area and the cavity wall of the spraying guide cavity not to make contact. The plasma arc region is a free arc region or a compressed arc region; powder in the powder bin is quantitatively discharged into the pneumatic pipeline, the pneumatic pipeline conveys the powder into the eruption guide cavity, and airflow drives the powder to pass through the plasma arc area and then is sprayed out of an eruption opening of the eruption guide cavity. The plasma generator controls the working temperature of the plasma arc area according to the material and particle size of the powder. And the firework effect of various flame colors can be displayed. The energy loss is effectively reduced, the heating speed is high, the temperature uniformity is good, and the energy consumption is low; the device has the advantages of simple structure, safety and reliability.

The invention relates to a glass composition, inorganic glass powder and a preparation method thereof, and automobile pressed glass conductive silver paste and a preparation method thereof. The glass composition comprises a first glass composition and a second glass composition, wherein the first glass composition and the second glass composition respectively comprise Bi2O3, SiO2, B2O3, Sb2O3, Na2O, Al2O3, K2O, Li2O and CaO; the glass is prepared from the following raw materials: Bi2O3, B2O3, ZnO, SiO2, CaF2, Al2O3, MgO and Sb2O3. The preparation method of the inorganic glass powder comprises the following steps: mixing two glass compositions, heating, melting, quenching with water, and ball-milling into powder. The preparation method of the conductive silver paste for the automobile pressed glass comprises the following steps: mixing the organic carrier, the inorganic glass powder, the functional additive and the spherical silver powder, and grinding to obtain the conductive silver paste for the automobile pressed glass. Compared with the prior art, the silver paste has the advantages of being low in sintering process window, good in acid and alkali resistance, welding performance, wear resistance and ink matching performance and the like by adopting a silver powder system of a polycrystalline-gap structure, low-melting-point glass powder and various special functional auxiliaries, and the technical requirements of'pressing method 'process production can be met.

The invention belongs to the technical field of ceramic preparation, and particularly relates to silicon nitride ceramic and a preparation method thereof. The silicon nitride ceramic is prepared from the following raw materials in parts by weight: 80-99.5 parts of silicon nitride powder and 0.5-20 parts of a sintering aid, the silicon nitride powder is alpha-Si3N4 powder; the sintering aid comprises at least two of CaF2, Y2O3, MgO, Mg (OH) 2, Al (OH) 3, Al2O3, AlN, MgCO3, Mg (NO3) 2, Y (NO3) 3 and Al (NO3) 3. On the basis of an existing silicon nitride dissolution-precipitation sintering mechanism, by adding sintering aids such as low-cost calcium fluoride, introducing a gas-phase mass transfer mechanism and combining a low-cost direct-current electric field assisted sintering technology, low-cost and rapid preparation of the high-performance silicon nitride ceramic is achieved, the process is simple and efficient, and operation is easy to control.

The invention relates to the technical field of quality detection, in particular to a gas atomization powder sphericity degree multi-dimensional online analysis system and a method thereof.The gas atomization powder sphericity degree multi-dimensional online analysis system comprises a dynamic dual-mode imaging module, a transverse wind field auxiliary detection unit and a multi-dimensional feature fusion analysis module; the transverse wind field auxiliary detection unit is used for applying controllable transverse wind power through an airflow nozzle orthogonal to the powder falling direction and measuring the deflection track of gas atomization powder ball particles in combination with a laser displacement sensor. The online calibration module is used for spraying standardized spherical particles to the powder flow according to a preset period; the traditional density detection depends on destructive sampling and off-line measurement, the efficiency is low, and the whole production line particles cannot be covered; through an orthogonal wind field trajectory inversion technology, a density value and an internal defect mark are synchronously output through non-contact dynamic measurement, 100% lossless online full inspection of a production line is realized, and sampling limitation and aging bottleneck of a traditional means are broken through.

The invention provides an early-strength rapid-repair grouting material and a preparation method thereof, and the early-strength rapid-repair grouting material is mainly prepared from the following raw materials: 50 to 150 parts of sulphoaluminate cement, 10 to 150 parts of aluminate cement, 200 to 350 parts of a regenerated gelling powder material, 1200 to 1400 parts of quartz sand, 50 to 100 parts of silica fume, 10 to 150 parts of mineral powder, 10 to 100 parts of fly ash, 15 to 50 parts of a composite retarder, 0.1 to 2 parts of a water reducing agent and 1 to 10 parts of an early strength agent. 0.01 to 1 part of a water-retaining agent and 200 to 300 parts of water. The early-strength quick-repair grouting material is characterized in that activated low-cementitious active mineral solid waste is adopted as a main cementitious material, and the product has excellent construction stability, low-carbon weather resistance, corrosion resistance, micro-expansion quick-hardening early strength and economical efficiency.

The invention discloses an intelligent material path planning method and device in a powder conveying system. The method comprises the steps that multi-source sensing data sent by a sensor is obtained, the sensor is used for monitoring operation of a powder conveying system, the multi-source sensing data comprises material state data, environment parameter data and equipment operation data, feature extraction and space-time alignment are conducted on the multi-source sensing data based on a pre-established Gaussian edge network, and the multi-source sensing data are obtained; obtaining a space-time alignment feature matrix; constructing and generating an intervention model according to the space-time alignment feature matrix; training a material path planning strategy based on the equal variance local neural network and the generation intervention model to obtain a path planning strategy model; and generating a powder conveying path by adopting the path planning strategy model, wherein the powder conveying path is used for controlling the powder conveying system to convey powder. According to the invention, precise modeling and intelligent path planning of a complex powder conveying environment are realized, and the conveying efficiency and the system stability are improved.

The invention relates to the technical field of program control, in particular to a precise powder supply control system, which is characterized in that multi-cycle differential processing of a rotating speed fluctuation ratio of a spiral feeder is performed on multiple key parameters such as a powder batch particle size value, a batch density value, an accumulated discharging amount and a feeding cycle; abnormal fluctuation numbers are extracted in different periods and combined according to the abnormal fluctuation numbers to generate a feeding feature set, a fuzzy neural network is utilized to improve the fitting precision of a discharging rate change trend under a nonlinear condition, the screening capability of extreme value interference is improved, a fluctuation difference value sequence is associated with symbol consistency and a density mean value, and the accuracy of the fluctuation difference value sequence is improved. Analyzing the variation trend of the discharge deviation in the symbol direction and the numerical slope, matching the numbers to establish a feed deviation grade section sequence, adopting a generative adversarial network to construct a target and actual discharge quantity difference value sequence, dividing symbol consistent sections, extracting the coupling trend of the fluctuation slope and the average density value, and obtaining a target discharge quantity difference value sequence; and misjudgment caused by deviation mode covering is avoided.

The invention provides nano-silicon-based high-strength concrete and a preparation method thereof, and belongs to the technical field of concrete.The concrete is prepared from cement, mineral powder, fly ash, machine-made sand, first-class gravel, second-class gravel, an additive, nano-silicon or a nano-silicon composite modified material and water; the additive is a polycarboxylic acid water reducer and / or a polyether air entraining agent. According to the prepared concrete, the nano silicon material with good dispersity is added, so that the cement consumption can be reduced, the cost can be reduced, and the workability, the strength and the durability can be improved; and the preparation process is simple and convenient, is suitable for large-scale production, and can be widely applied to the engineering fields of high-rise buildings, bridges, tunnels and the like.

The invention belongs to the technical field of thermal barrier coatings, and provides an artificial preparation method of multi-scale aero-engine environment sediment particles. The preparation method comprises the following steps: grinding CMAS original powder into mixture powder; calculating the mass of the required mixture powder according to the powder density of the CMAS original powder and the particle size of the target sediment particles; weighing the mixture powder, and pressing the mixture powder into sheets; in an air suspension furnace, tabletting and melting the mixture powder into balls by adopting a laser; and rapidly cooling to normal temperature to obtain the target sediment particles with the target particle size. The melting process of the CMAS powder is greatly improved, the gas suspension furnace and the laser are used for heating, single CMAS particles with the designed size can be obtained in a short time, the preparation time is shortened, and the preparation cost is effectively reduced.

The invention relates to a preparation method of high-strength and high-toughness composite silicon carbide ceramic, which comprises the following steps: mixing 70-82 parts of micron-sized alpha-silicon carbide powder, 5-15 parts of a mixed reinforced phase, 5-10 parts of a sintering aid, 1.9-2.1 parts of a dispersant and 0.9-1.1 parts of a binder to obtain a powder raw material, adding deionized water into the powder raw material, and carrying out ball milling to obtain water-based slurry; carrying out spray granulation on the water-based slurry to prepare spherical granulation powder; and adding the spherical granulation powder into a graphite mold, putting the graphite mold into a hot-pressing sintering furnace, heating to a sintering temperature, and carrying out hot-pressing sintering to obtain the high-strength and high-toughness composite silicon carbide ceramic. By adopting the method disclosed by the invention, the high-performance silicon carbide ceramic material with higher mechanical property and higher toughness can be obtained.

The invention relates to the technical field of powder metallurgy, in particular to a preparation process of a graphene composite profile prepared from brass waste, which comprises the following steps: selecting the brass waste containing different components according to the application scene of the graphene composite profile; the brass waste materials are smashed into brass block-shaped smashed materials; the preparation method comprises the following steps: adding 0.001-10% by mass of graphene into the brass block-shaped crushed aggregates, and carrying out wet ball milling to form a first-size mixed powder liquid; carrying out semi-solid rotary shearing and stirring processing on the mixture; and continuously extruding the graphene-brass mixed base material to form a graphene composite profile blank, and carrying out post-process to obtain the graphene composite profile capable of overcoming brass spot, line and surface defects. According to the invention, a powder metallurgy process is combined with a medium-temperature continuous extrusion process, so that the brass waste is efficiently and directly recycled without pollution, and the physical properties and chemical properties such as hardness, strength, conductivity, corrosion resistance and high-temperature creep resistance of the composite material are greatly improved. The invention further correspondingly discloses the graphene composite profile and application.