430 results about "Pure metals" patented technology

Provided herein are low resistance metallization stack structures for logic and memory applications and related methods of fabrication. In some embodiments, thin metal oxynitride or metal nitride nucleation layers are deposited followed by deposition of a pure metal conductor. The nucleation layer is amorphous, which templates large pure metal film grain growth and reduced resistivity. Further, certain embodiments of the methods described below convert most or all of the metal oxynitride nucleation layer to a pure metal layer, further lowering the resistivity.

The invention discloses a method for preparing an ultrahigh-temperature ceramic coating by an ultrahigh-temperature metal gas source based on a molten salt medium, which comprises the following steps of: mixing low-melting-point salt A, metal fluoride and metal M to obtain a mixture C, putting the mixture C into a first crucible, mixing low-melting-point salt B and metal M to obtain a mixture D, putting the mixture D into a second crucible, putting a carbon base material into a deposition furnace, and performing vacuum drying to obtain the ultrahigh-temperature ceramic coating. Heating the first crucible to melt the mixture C to obtain a melt E, and heating the second crucible to melt the mixture D to obtain a melt F; carrier gas is guided into the first crucible, the carrier gas flow passes through the melt E to form gas flow containing a metal gas source, the gas flow containing the metal gas source is guided into the second crucible, and the gas flow containing the metal gas source is filtered by the melt F in the second crucible to form a pure metal reaction gas source, and finally, a pure metal reaction gas source is introduced into the deposition furnace for deposition of the carbon base material, and the ultra-high-temperature ceramic coating is obtained. The method is easy to operate and low in cost.

The invention belongs to the field of secondary battery manufacturing, and particularly relates to a composite foil current collector welding method.The composite current collector comprises an upper aluminum conducting layer, a middle high-molecular polymer layer and a lower aluminum conducting layer, and the welding method comprises the following steps that S1, micropore machining is carried out on a tab area of the composite current collector, forming a through micropore array; s2, laying a first pure metal foil on the upper surface of the tab area, and laying a second pure metal foil on the lower surface of the tab area; and S3, welding the tab area on which the pure metal foil is laid, so that the first pure metal foil, the upper aluminum conductive layer, the lower aluminum conductive layer and the second pure metal foil form through metallurgical bonding at the position of the micropore. According to the composite foil current collector welding method, ultrasonic energy is highly concentrated on a metal interface at the edge of a micropore, local metallurgical connection is achieved, overall heat input is low, hot melting and carbonization of a middle high-molecular polymer layer are effectively avoided, and an ultrathin metal layer is protected against heat damage.

The present disclosure relates to the field of the preparation of high purity sodium and the safe treatment of sodium calcium slag, and discloses a method and apparatus for sodium slag recovery by using gravity separation—controllable combustion—alkaline liquor leaching process for the preparation of high purity sodium and safe treatment of sodium calcium slag. The method comprises the following steps: (1) subjecting a liquid sodium slag to a gravity stratification to obtain pure metallic sodium and high calcium content sodium slag; (2) roasting the high calcium content sodium slag to obtain a roasting slag; and (3) leaching the roasting slag by using an alkaline liquor to obtain the sodium hydroxide solution and calcium hydroxide. The method and apparatus provided by the present disclosure have advantages including high efficiency separation of sodium and calcium, saving separation time, safe and controllable production process, and continuous production process, thereby providing a safe and efficient method for the preparation of high purity sodium and safe treatment of new sodium calcium slag generated by the method, allowing continuous production of high purity sodium and safe recycle of new sodium calcium slag.

The invention discloses a method for producing high-purity metal chromium from waste chromium-containing refractory materials by using a carbon reduction method, belongs to the technical field of general industrial solid waste resource environment-friendly comprehensive utilization and metal smelting, and particularly relates to a method for producing the high-purity metal chromium from the waste chromium-containing refractory materials by performing crushing magnetic separation, acid leaching impurity removal, carbon reduction, slag-metal separation and electroslag refining processes on the waste chromium-containing refractory materials. The purity of the finally produced metal chromium reaches 98.9%-99.4%, and the chromium recovery rate reaches 82.2%-82.5%. Wherein yttria-stabilized zirconia and lanthanum oxyfluoride are selected as additives, it is accidentally found in the research process that the lanthanum oxyfluoride and zirconia are combined for use to have a synergistic effect, and during specific combination, lanthanum oxyfluoride and zirconia can form a La-Zr-O-F composite melt, so that the slag-gold separation efficiency is remarkably improved; and further, the purity of the final product chromium metal is obviously improved.

The invention provides a preparation method and system of high-purity metal rubidium or cesium, the method comprises the following steps: taking metal rubidium or cesium as a raw material, taking molten metal Ag as an extraction medium, utilizing the characteristics that Na, Li and K have certain solubility in metal Ag and rubidium and cesium are insoluble in Ag, reducing the content of impurities Na, Li and K in the metal raw material rubidium or cesium, and then carrying out vacuum distillation to obtain the high-purity metal rubidium or cesium. According to the method, purification and impurity removal are conducted on the metal rubidium or cesium through melt extraction, the metal raw material rubidium or cesium can be treated to prepare the high-purity metal rubidium or cesium product, the purification rate of Na and Li is 80% or above, the purification rate of K is 50% or above, the purity of the prepared high-purity rubidium is 99.90% or above, the purity of the prepared high-purity cesium is 99.95% or above, the yield is 95% or above, the technological process is short, equipment is simple, and the method is suitable for industrial production. The problems of low efficiency and unobvious impurity removal effect of traditional distillation are solved.

The invention discloses mold equipment for forming a metal wrap angle. The mold equipment comprises a wrap angle forming module, a clamping mechanism, a synchronous feeding and discharging mechanism, a table top and a stamping module, the stamping module is fixedly mounted on the table board; the wrap angle forming module comprises an external positioning ring, a wrap angle metal shell outer sleeve, a metal shell mold lower bottom ring, a core, an edge wrapping metal shell positioning ring, a metal blank, a middle sleeve positioning ring and an edge forming middle sleeve. The external positioning ring is clamped in a limiting buckle on the table top, the wrap angle metal shell outer sleeve is placed on an inner ring of the external positioning ring, and the lower face of the wrap angle metal shell outer sleeve is attached to the table top; when in use, the wrap angle forming module adopts a form of combining a plurality of pure metal circular rings to achieve a forming effect, the manufacturing difficulty of the independent circular rings is greatly reduced, uniform blanking can be performed through laser cutting, and then a fit clearance is subjected to finish machining through a lathe, so that the mold manufacturing time is shortened, the waste of raw materials is greatly reduced, and the production cost is reduced. And the method can be efficiently and quickly put into a production link.

The invention relates to the field of semiconductor single crystal material preparation processes, and discloses a process method for synergistically recovering indium and germanium from zinc leaching residues and preparing single crystals, which comprises the following steps: mixing a crude extract and a liquid metal solvent, carrying out low-temperature extraction to obtain mixed slurry, carrying out thermal-phase in-situ purification on the mixed slurry, separating a liquid-solid phase by utilizing thermal gradient migration, and carrying out solid-liquid separation on the separated liquid-solid phase. Performing directional solidification and purification to obtain an ultra-clean growth solution; analyzing the indium-germanium proportion of the ultra-clean growth solution, and supplementing pure metal for chemical component calibration; the ultra-clean growth solution with accurate components is used for liquid phase epitaxial growth to obtain single crystals, the thermodynamic principle is used for replacing physical filtration, so that particle heterogeneous nucleation centers are removed, the influence of chemical fluctuation of raw materials is eliminated through a built-in calibration link, and the physically pure growth solution with accurate components is prepared; the industrial preparation of the high-quality single crystal is ensured.

The invention relates to a method for purifying rhodium from a complex-component rhodium leaching solution, and belongs to the technical field of precious metal refining and purification. The method comprises the following steps: adding a reducing agent into rhodium leaching liquid for reduction to obtain RhCl3 primary purification liquid and insoluble slag; simultaneously adding sulfite and ammonium salt into the RhCl3 primary purification liquid to precipitate rhodium in the form of (NH4) 3Rh (SO3) 3; hydrochloric acid is added into the (NH4) 3Rh (SO3) 3 precipitation residues, heating and boiling are conducted, the (NH4) 3Rh (SO3) 3 precipitation residues are dissolved in the form of RhCl3 and enter a solution, SO3 < 2-> in the solution is removed in the form of SO2, and a secondary purification solution of RhCl3 is obtained; adding a strong oxidant into the secondary purified solution of RhCl3, and carrying out oxidation reaction to obtain RhCl4; adding alkali into the RhCl4 solution to adjust the pH value, and boiling to obtain RhO2. 2H2O precipitation slag; and the RhO2. 2H2O precipitation slag is sequentially subjected to pure water slurrying, hydrazine hydrate reduction, calcination and hydrogen reduction to obtain the high-purity metal rhodium. According to the method disclosed by the invention, the high-purity metal rhodium of which the purity is greater than 99.95% can be prepared, and the direct recovery rate of rhodium is greater than 97%.

The invention discloses a multi-scale research method for improving the separation efficiency of impurities in an ultra-pure metal system. The multi-scale research method comprises the following steps that tellurium crystals are prepared through a zone melting method, and purity and crystal face orientation analysis is conducted; simulation analysis is carried out in combination with experimental data, firstly, phase field simulation is used for analyzing conversion of an interface structure and grain competition-driven orientation in the solidification process, then the density functional theory is used for calculating and analyzing adsorption energy of solid phases on different crystal faces at the solid-liquid interface to impurity atoms, and the structure-activity relationship between crystal face orientation and impurity separation efficiency is obtained. Finally, the crystal face and the preferred orientation degree of the tellurium crystal are regulated and controlled through a Bridgman method, and the impurity separation efficiency is improved. By means of the mode, the key factors influencing trace impurity atom separation can be obtained, the universal method for improving the impurity separation efficiency in the ultra-pure metal system is obtained, and development of the non-ferrous metal metallurgy field is promoted.

Provided herein are low resistance metallization stack structures for 3D-NAND applications and related methods of fabrication. In some embodiments, thin metal oxynitride nucleation layers are deposited on dielectric material followed by deposition of a pure metal conductor using process conditions that increase non-molybdenum component element content at the oxynitride-dielectric interface. Certain embodiments of the methods described below convert less than all of the metal oxynitride nucleation layer to a pure metal layer, further lowering the resistivity.

The invention belongs to the technical field of wrought aluminum alloy material processing, and relates to a high-strength high-conductivity 7050 aluminum alloy and a short-process preparation process thereof.The process comprises the steps that pure metal aluminum, pure metal zinc, pure metal magnesium, pure metal copper and pure aluminum-zirconium intermediate alloy serve as raw materials, 6.1-6.3 wt.% of Zn, 2.3-2.5 wt.% of Mg, 2.4-2.6 wt.% of Cu and 0.12-0.14 wt.% of Zr are matched, smelting, melt refining and refining treatment are carried out, and then the high-strength high-conductivity 7050 aluminum alloy is obtained; sub-rapid solidification of a melt is realized by adopting water-cooling copper mold casting, as-cast grains are remarkably refined, and formation of a coarse second phase is inhibited; traditional multi-stage annealing is replaced with single-stage homogenizing annealing, so that the residual phase area percentage is smaller than or equal to 1.0%, and the maximum residual phase size lt is achieved; 30 [mu] m; and by combining multi-pass hot rolling and solid solution-aging cooperative regulation and control, the problem of intensity-conductivity inversion caused by second phase distribution and grain boundary segregation is solved. Compared with a traditional process, the homogenization time is shortened by 50% or above, the total technological process is reduced by 30%-40%, and finally the high-performance 7050 aluminum alloy with the tensile strength larger than or equal to 650 MPa and the electric conductivity larger than or equal to 40% IACS is obtained.

The invention discloses a method for accurately measuring trace calcium in high-purity magnesium metal by combining membrane desolvation and triple quadrupole mass spectrometry, which comprises the following steps: (1) sequentially adding water to wet a high-purity magnesium sample and adding acid to dissolve the sample to obtain a digestion solution, and adding an internal standard solution into the digestion solution; (2) preparing calcium element solutions with multiple concentration gradients, adding the internal standard solution, fixing the volume, and shaking uniformly; (3) sequentially carrying out atomization treatment and membrane desolvation treatment on the prepared solution to respectively obtain dry aerosol of the to-be-detected solution and the standard solution; and (4) carrying out scanning determination on the dry aerosol of the solution to be detected and the standard solution in the step (3) by using a triple quadrupole mass spectrometer, and calculating to obtain the calcium content in the high-purity magnesium sample. According to the method, the 24Mg16O polyatomic interference brought by the matrix element and the mass spectrum interference of the working gas Ar on the to-be-detected element 40Ca are removed through membrane desolvation and triple quadrupole mass spectrometry, so that the trace calcium element in the high-purity magnesium sample can be accurately determined, and the lower determination limit can reach ppb level.

A device and method for preparing high-purity metals by vacuum distillation and bidirectional step condensation, the device comprising an atmosphere control device, a vacuum distillation device, a charging device, an intelligent control device, and an exhaust gas treatment device. The atmosphere control device comprises a nitrogen bottle and a control valve located above the bottle mouth for controlling the opening and closing of the nitrogen bottle. The vacuum distillation device comprises a vacuum distillation device and a vacuum pump connected to the vacuum distillation device via a pipeline. The charging device is located in the middle of the vacuum distillation device, and the intelligent control device is connected to the vacuum distillation device. The exhaust gas treatment device comprises an impurity removal device. The vacuum distillation device is provided with a plurality of heaters, which are arranged in parallel along the length direction of the charging device and the condensation zone on both sides of the vacuum distillation device. The present invention also includes a method for preparing high-purity metals using the device. The device of the present invention has a simple structure, is not restricted by the gravity field, is convenient for sampling, and has high impurity removal efficiency.

The invention discloses a control method for optimizing a solid / liquid interface of a solution in indium Czochralski purification based on numerical simulation, belongs to the technical field of preparation of high-purity metal materials, and obtains a process regulation and control scheme for stabilizing the solid / liquid interface of the solution through an external magnetic field and establishment of a mapping relation of process parameters-interface data-impurity concentration based on multi-physics field numerical simulation. The method comprises the following steps: acquiring original physical property data of the czochralski furnace and indium, calculating a geometric model, performing mesh generation, and establishing a mathematical model; based on historical experimental data, boundary conditions are set, and the key processes of indium czochralski purification seeding, shouldering and equal diameter are simulated; coupling multiple physical fields, and analyzing the change of a solid / liquid interface of the solution in the direct pulling process; and on the basis of a numerical simulation result, a deep reinforcement learning model is constructed, a mapping relation among process parameters, interface data and impurity concentration is established, 'prediction-verification-optimization 'closed-loop iteration of the process is realized, and collaborative regulation process parameters for stably preparing 8N high-purity indium are obtained.

The invention relates to the technical field of resource recovery and metallurgy, and discloses a method for separating high-purity metal from neodymium-iron-boron alloy waste, which comprises the following steps: by taking the neodymium-iron-boron alloy waste as an anode and an inert material as a cathode, oxidizing and dissolving Nd, Dy, Pr, Co and Fe into electrolyte by adopting constant-voltage electrolysis, and separating out part of Fe at the cathode to obtain high-purity iron; adding sodium sulfate into the electrolysis tail liquid, adjusting the pH value, and filtering to obtain sodium sulfate double salt precipitate of rare earth and filtrate; h2O2 is added into the filtrate, sodium jarosite is obtained through filtration by adjusting the pH value, NH4HCO3 is added into the iron-removed filtrate to precipitate CoCO3, and the tail liquid can be directly and repeatedly used in the electrolysis process; the rare earth sodium sulfate double salt precipitate is sequentially subjected to hydrochloric acid dissolution, two-step extraction, precipitation and roasting, and Dy, Nd and Pr oxides are obtained respectively. Comprehensive recovery of metal is achieved through the processes of electrolysis, extraction, precipitation, roasting and the like, and the method has the advantages of being simple in process, high in metal purity, low in material consumption and energy consumption, free of pollution and easy to industrialize.

The invention discloses a preparation method of an R-T-B rare earth permanent magnet, and the method comprises the following steps: 1, coating with a coating: coating an S1 region on the surface of a permanent magnet substrate with a first coating to obtain a first coating region S1, and coating an S2 region on the surface of the permanent magnet substrate with a second coating to obtain a second coating region S2; the first coating area S1 is smaller than or equal to S, the second coating area S2 is smaller than or equal to S, S is the magnet surface area where the coating face is located, and the first coating and the second coating are composed of one or more components of pure metal containing Dy and / or Tb, hydride, fluoride and oxide; and 2, carrying out grain boundary diffusion treatment on the magnet obtained in the step 1, and carrying out aging treatment after cooling to obtain the R-T-B rare earth permanent magnet. The method has the advantages that diffusion of heavy rare earth in a grain main phase can be reduced, the use amount of the heavy rare earth is reduced, and the coercive force of a selected area can be further enhanced.

The invention relates to the technical field of recycling of cast nickel-based high-temperature alloy return scraps, and particularly discloses a method for extracting valuable metals in high-temperature alloy return scraps through carbonylation metallurgy. Comprising the steps of sulfuration smelting of the return scrap, carbonylation nickel extraction of the return scrap, chlorination of the material after nickel extraction, and graded carbonylation tungsten, chromium and molybdenum extraction, and nickel, chromium, tungsten and molybdenum in the cast nickel-based high-temperature alloy return scrap can be prepared into high-purity metal products by utilizing the characteristic of high selectivity of the carbonylation process. The nickel-based high-temperature alloy tailings can be directly sold as products in the forms of nickel carbonyl, chromium carbonyl, tungsten carbonyl and molybdenum carbonyl, meanwhile, the enrichment of rare and precious metals in the nickel-based high-temperature alloy tailings is realized, CO gas and chlorine gas used in the extraction process can be recycled, and the process can ensure the product quality while saving the cost, and is suitable for industrial production. And the method has huge economic benefits and relatively high popularization and implementation values.

The invention relates to the technical field of metal beryllium powder, in particular to a preparation process of high-purity micron-sized metal beryllium powder, which comprises the following steps: (1) obtaining beryllium hydroxide; (2) obtaining basic beryllium acetate; (3) obtaining high-purity basic beryllium acetate; (4) obtaining high-purity beryllium oxide; (5) forming a molten salt system; (6) adding high-purity beryllium oxide into the molten salt system, uniformly mixing, and electrolyzing under the protection of inert atmosphere to obtain high-purity micron-sized metal beryllium powder; according to the method, the high-purity metal beryllium powder with the particle size as low as micron can be obtained, is small in particle size and uniform in distribution, has high thermal conductivity and good electromagnetic performance, and can be used for manufacturing electronic elements and magnetic recording materials; the magnetic recording material prepared from the high-purity micron-sized metal beryllium powder has the advantages of high stability, clear image, high signal-to-noise ratio, small distortion and the like.

The invention discloses a vacuum induction furnace smelting process for magnesium microalloying of H13 hot work die steel, and belongs to the technical field of ferrous metallurgy. According to the method, the contents of Al2O3, MgAl2O4 and MgO inclusions of the H13 hot work die steel with different Mg contents at different temperatures are calculated through software. And determining an interval in which the content of the MgAl2O4 inclusions accounts for the maximum so as to determine the optimal content of the added Mg. A vacuum induction furnace is adopted, after pure metal materials are melted and refined through operations such as vacuumizing, water feeding and electrifying, alloy materials are added for alloying, the content of Mg is controlled, and finally the alloy materials are cast in a preheated mold for casting. According to the method, Al2O3 in molten steel can be effectively converted into MgAl2O4, the solidification structure and liquation carbide of the H13 hot work die steel are effectively refined, and the segregation behavior of alloy elements is reduced.

The invention discloses a method for connecting a skutterudite thermoelectric material and an electrode by using a high-entropy alloy and soft pure metal composite intermediate layer, and relates to a method for connecting the skutterudite thermoelectric material and the electrode. The objective of the invention is to solve the problems of large interface residual stress and easy cracking of an electric connection joint of an existing skutterudite thermoelectric material and an electrode. The method comprises the following steps: 1, cleaning a skutterudite thermoelectric material and an electrode; 2, preparing a composite intermediate layer of soft metal and high-entropy alloy by using methods such as electroplating, physical vapor deposition, sheet or powder intercalation hot pressing and the like, and performing diffusion welding connection on the cobalt ore thermoelectric material and the electrode by using the composite intermediate layer; the material of the soft metal layer comprises but is not limited to Ni, Cu, Fe, Al, Nb, Au, Ag or Pt; and the components of the high-entropy alloy layer comprise but are not limited to an Al-Co-Cr-Fe-Ni system, an Fe-Co-Ni-Cr-Mn system, an Fe-Co-Ni-Cu system, a Mo-Co-Cr-Fe-Ni system, an Hf-Nb-Ta-Ti-Zr system, an Nb-Ti-V-Zr system and an Mo-Nb-Re-Ta-W system. The skutterudite thermoelectric material obtained by utilizing the composite lamination of the soft metal intermediate layer and the high-entropy alloy intermediate layer and the electrode contact have low contact resistivity, extremely high thermal stability and high mechanical property of a connection interface at the same time. The method is suitable for connecting the skutterudite thermoelectric material and the electrode.

The present invention relates to a method for preparing high-purity metallic bismuth, and relates to the technical field of non-ferrous metal metallurgy. The preparation method comprises the following steps: (1) in an inert atmosphere, a bismuth-containing raw material, phosphorus pentoxide and sulfate accounting for 1 / 3 to 1 / 2 of the total amount of sulfate are melted to obtain a product, and then the product is skimmed to remove the generated phosphate scum to obtain metallic bismuth with a purity of 4N; (2) the metallic bismuth obtained by skimming in step (1) is ground and sieved, and then mixed with sulfate accounting for 1 / 2 to 2 / 3 of the total amount of sulfate and subjected to two-stage vacuum distillation; (3) while performing two-stage vacuum distillation in step (2), graded condensation is performed to obtain high-purity metallic bismuth with a purity of 5N. Compared with traditional vacuum distillation and zone smelting processes, the present invention has the advantages of good purification effect, high impurity removal efficiency, etc., and has good application prospects.

The invention discloses a rare earth microalloyed Al-Fe-Si-based multipurpose aluminum alloy conductor and a preparation method thereof, and relates to the technical field of metal material processing and manufacturing. The component formula of the lead is Al-xFe-ySi-zRE-mCu-nMg-pZn, wherein x is larger than or equal to 0.3 and smaller than or equal to 0.55, and 0.15 lt is larger than or equal to 0.15. X is larger than or equal to 0.3, y is smaller than or equal to 0.3, z is larger than or equal to 0.1 and smaller than or equal to 0.35, m is smaller than or equal to 0.2, n is smaller than or equal to 0.2, p is smaller than or equal to 0.2, and x is larger than or equal to y. The lead is prepared from pure aluminum and intermediate alloy or pure metal as raw materials through a cross-deformation two-stage aging and torsion extrusion-drawing composite cold deformation technological method matched with an alloy formula. According to the method, the Al-Fe-Si-based aluminum alloy wires with different characteristics can be developed, and the Al-Fe-Si-based aluminum alloy wires are suitable for application scenes of high conductivity-high strength, high conductivity-high plasticity and high conductivity-high strength-high plasticity respectively.

The utility model provides a composite current collector. The composite current collector comprises an adhesive polymer base film and metal b films compounded on the two sides of the adhesive polymer base film. According to the composite current collector provided by the utility model, on one hand, various problems caused by a vacuum coating process can be avoided, and on the other hand, the adhesive force between the metal film and the polymer base film does not need to be strengthened by using materials such as an adhesive; the composite current collector which is ultrathin, high in tensile strength, large in elongation at break, good in thermal stability, good in electrochemical stability, good in metal film adhesive force, simple in production process, high in efficiency, high in yield and low in cost can be obtained, and large-scale replacement and batch production of pure metal foil current collectors in an electrochemical device can be achieved through the composite current collector.

The invention discloses an alloy aluminum bar containing rare elements and a preparation technology of the alloy aluminum bar. The alloy aluminum bar comprises, by mass, 1.5%-3.3% of Mg, 0.7%-1.1% of Si, 1.0%-1.7% of Cu, 0.15%-0.3% of Y, 0.07%-0.1% of Er, 0.05%-0.11% of Gd, 0.07%-0.24% of La, 0.08%-0.15% of Zr, 0.07%-0.12% of Ti, 0.05%-0.1% of Sc, smaller than or equal to 0.1% of Fe, 0.35%-0.7% of Mn, 0.2%-0.6% of Ni, smaller than or equal to 0.5% of total impurities and the balance aluminum. The preparation process comprises the following steps: burdening: accurately weighing a high-purity aluminum ingot, Al-Y, Al-Zr, Al-Ti intermediate alloy and pure metal according to the components; smelting: melting at 720-750 DEG C, preserving heat, and protecting by argon; cooling to 740-720 DEG C, and adding an intermediate alloy; a refining agent is added for degassing and deslagging, and slagging-off is conducted after standing is conducted for 30 min; casting: the temperature is 720-740 DEG C, the casting speed is 120-200mm / min, the strength of cooling water is 0.06-0.15 MPa, the water temperature is 10-30 DEG C, and online degassing is performed outside the furnace so that the hydrogen content is less than or equal to 0.15 cm / 100g Al; through scientific proportioning of conventional alloy elements such as Mg, Si, Cu and Mn and various rare elements such as Y, Er, Gd, La, Sc, Zr and Ti, the synergistic strengthening effect of the conventional elements and the rare elements is achieved, and the performance bottleneck of a traditional aluminum alloy is effectively broken through.

The invention provides a preparation method of high-purity antimony, and belongs to the technical field of high-purity metal materials. The preparation method of the high-purity antimony comprises the following steps that a crude antimony raw material is added into a cylindrical container, then the cylindrical container is placed in an induction heating coil, and under the conditions that the induction power is 30-150 kW, the change frequency is 2-15 kHz and the rotating eddy current is in the clockwise direction, the crude antimony raw material is subjected to induction melting, and gathering the impurities at the edge, parallel to the section circle of the cylindrical container, of the molten antimony, cooling, and removing the impurities to obtain the high-purity antimony. According to the preparation method of the high-purity antimony, the purity of the crude antimony raw material can be rapidly and effectively improved.

The invention relates to a forming method for composite electroplating of an MEMS (Micro Electro Mechanical System) probe. Structural patterns of a needle tip or / and a needle body are / is photoetched through a micro-electro-mechanical process, the needle tip or / and the needle body is / are formed through electroplating of a composite plating solution after pretreatment, the composite plating solution is obtained by mixing a metal base solution and a turbid liquid, the metal base solution is a nickel base solution and / or a rhodium base solution, and the turbid liquid is a nickel base solution and / or a rhodium base solution. The suspension is formed by suspending nano-powder in water through a dispersing agent. Compared with the prior art, the technology provided by the invention has the following advantages that the MEMS process technology is combined with the composite plating solution to be used for various probe structures, and the performance of the prepared material is greatly improved compared with that of a pure metal coating; the composite plating solution prepared from the plating solution and the second-phase particles is high in stability, and the electroplating process is easy to operate; the nickel-based composite plating solution can be used for obtaining a main body material with higher hardness, better wear resistance and better flexural property; the rhodium-based composite plating solution is used for preparing a needle point material, has higher hardness and wear resistance, and improves the brittle fracture problem.

The invention discloses a coated granular YHx-based moderator, and relates to the technical field of nuclear reactor materials, the coated granular YHx-based moderator comprises YHx particles and a coating layer, the chemical formula of the YHx particles is YHx, x ranges from 1.5 to 2, the coating layer sequentially comprises a loose pyrolytic carbon layer, an inner compact isotropic pyrolytic carbon layer, a silicon carbide layer and an outer compact isotropic pyrolytic carbon layer from inside to outside, and the thickness of the coating layer is 10 to 100 microns. The preparation method of the YHx particles comprises the step that high-purity metal yttrium particles directly react with high-purity hydrogen in a high-temperature vacuum environment to prepare the YHx particles. The preparation method of the coating layer is chemical vapor deposition. The coated granular YHx-based moderator is subjected to heat treatment, the heat treatment temperature is 1200-1500 DEG C, the heat treatment time is 1-2 hours, and the coated granular YHx-based moderator is suitable for being used as a moderator material in a nuclear reactor. The YHx particles are protected by the coating layer, so that the stability of the YHx particles in high-temperature and irradiation environments is improved, and the service life of the YHx particles is prolonged.

The application provides a high-throughput high-entropy alloy component design method, comprising the following steps: S1) preparing an initial sample of pure metal or alloy; S2) preparing a master alloy ingot according to the high-entropy alloy component; S3) assembling the initial sample at the bottom of a mold shell, fixing the mold shell on a directional solidification furnace pulling device, and exposing a part of the initial sample from the liquid level of a cooling tank, and immersing the remaining part into the cooling liquid in the cooling tank; S4) assembling the master alloy ingot on the upper part of an induction dripping system of the directional solidification furnace, and turning on the heating power supply of the directional solidification furnace; S5) turning on the induction dripping system until the master alloy ingot is melted and dripped into the mold shell, and then cooling and solidifying after heat preservation. The high-throughput sample component prepared by the method provided in the application is uniform and linear, and the component screening precision is higher; the high-throughput sample with single-element or multi-element coupling change can be efficiently prepared, the performance data reliability is higher, and the industrial application potential of the alloy is greater.

The invention discloses a preparation method and application of a pole piece of a composite current collector. The pole piece comprises a composite polymer film with an adhesive layer on the surface of a polymer layer; holes penetrate through the composite polymer film at equal intervals; performing composite molding on two surfaces of the composite polymer film and aluminum foil, and performing high-temperature curing; etching the aluminum foils on the two sides to a target thickness; after drying, slitting along the edge of the hole to obtain a composite current collector with a welding area on one side edge; one end of the tab is arranged in the groove of the welding area, and the tab-aluminum foil-aluminum foil welding is realized by adopting ultrasonic welding. According to the invention, a polymer layer is canceled at a local fixed point of the composite current collector to obtain a pure metal tab welding site, the pure metal tab can be directly welded with the tab through the pure metal site, and an external aluminum foil switching process is removed; the process of composite current collector transfer welding is reduced, the overall yield of battery cell manufacturing is improved by more than 5%, and the preparation time of the battery cell is shortened to 8 h; moreover, transfer welding positions are reduced, the head space of the battery cell is narrowed, and the energy density is improved by more than 2%.