1302 results about "Tantalum" patented technology

The invention relates to the technical field of multi-source information analysis, in particular to a niobium-tantalum metal ore metallogenic evaluation system based on multi-source information analysis, which comprises a geologic structure association module, a mineral distribution interpretation module, a metallogenic environment adaptation module, a spatial feature analysis module and a potential region judgment module. According to the method, by introducing a multi-source data analysis and fusion method, the evaluation precision and comprehensive capability of resource exploration are effectively improved, analysis after information fusion is combined with relevance and spatial modes of different data types, it is ensured that mineralization potential evaluation is more accurate, the limitation of a single data source and manual analysis is overcome, and the method is suitable for popularization and application. According to the method, the identification precision and reliability of the mineralization law are improved, the potential area can be identified more accurately, resource potential analysis is optimized in combination with the adaptability of the mineralization environment, the efficiency and accuracy of determining the mineralization area are remarkably improved, the problems of information isolation and analysis deviation in a traditional method are avoided, and the scientificity and the practical application value of the exploration process are enhanced.

[Problem] To provide a device usable for a concentration measuring apparatus and a concentration measuring method that make it possible to detect a threshold voltage Vth with high sensitivity and quickly measure the concentration of a substance of interest in a sample liquid even if the amount of the substance of interest in the sample liquid is extremely small. [Solution] A device comprising an insulating substrate, at least one insulating composite layer, and a liquid storage part capable of holding a sample liquid, wherein the insulating composite layer has a pair of electrodes and a semiconductor layer in contact with the pair of electrodes, and the liquid storage part has a reference electrode that makes contact with the sample liquid. The semiconductor layer is composed of an oxide containing an indium (In) element, a zinc (Zn) element, and an additive element (X), wherein the additive element (X) is at least one element selected from tantalum (Ta), strontium (Sr), and niobium (Nb). A sensitive membrane selective for the substance of interest in the sample liquid is provided between the insulating composite layer and the liquid storage part.

The medium-temperature radial forging method comprises the steps that pretreatment is conducted, specifically, a niobium-tungsten alloy extrusion bar blank is heated for 60-180 minutes at the temperature of 750-950 DEG C, rapid forging and straightening are conducted, and a medium-temperature radial forging bar blank is obtained and annealed for 60-120 minutes at the temperature of 1250-1450 DEG C; medium-temperature radial forging is conducted, specifically, a two-step method is adopted, in the first step, a bar blank is preheated to 80-100 DEG C and coated with Ta1350 high-temperature glass powder, heat preservation is conducted for 90-180 minutes at the temperature of 1050-1150 DEG C, and the bar blank is forged into a bar with the diameter of 70 + / -1 mm in the mode that the diameter is reduced by 7-10 mm every time; and in the second step, the heating and coating processes are repeated, the diameter is reduced by 5-7 mm every time, and the bar with the required specification is manufactured. By optimizing the medium-temperature forging and annealing process, the fine grain structure is controlled, the high-temperature mechanical property, creep resistance and oxidation resistance of the material are improved, and the material is suitable for aerospace engines and other high-temperature and high-pressure scenes. Compared with a traditional method, the technology improves the yield, shortens the production period, reduces the labor intensity, is suitable for large-scale production, reduces surface air suction, oxidation and burning loss, and improves the production efficiency and the finished product quality.

The invention provides a surface-modified sulfide electrolyte and a preparation method thereof, and an all-solid-state battery, the surface-modified sulfide electrolyte comprises a sulfide electrolyte and a modification layer coated on the surface of the sulfide electrolyte, the chemical general formula of the modification layer is LiaMbNcXd, 0 < = a < = 3, 0 < = b < = 1, 0 < = c < = 1, 0 < = d < = 6, and 0 < = c < = 1. M is at least one element of magnesium, aluminum, calcium, iron, zirconium, niobium, tantalum, tungsten, gadolinium, yttrium, indium, hafnium, lanthanum and ytterbium, and X is at least one element of oxygen, sulfur, fluorine, chlorine, bromine and iodine. According to the surface-modified sulfide electrolyte, the modification layer with high ionic conductivity and high oxidation potential is coated outside the sulfide electrolyte, so that when the surface-modified sulfide electrolyte is applied to a positive electrode of an all-solid-state battery, the modification layer can improve the oxidation potential of the electrolyte on the premise of not reducing the ionic conductivity of the electrolyte; the effects of improving the interface stability between the positive electrode active material and the sulfide electrolyte and further improving the cycle performance of the battery are achieved.

The invention discloses a component gradient iridium tantalum coating anode and a preparation method thereof, the component gradient iridium tantalum coating anode comprises a titanium-based bottom layer, a middle layer and a surface active layer structure with component gradient, and the middle layer and the active layer are both prepared through a thermal decomposition method. And the intermediate layer is prepared on the titanium substrate and is composed of TiO2 / Ta2O5 mixed oxide. The surface active layer is prepared on the outer side of the middle layer and comprises a plurality of layers of IrO2 / Ta2O5 oxide coatings with different iridium-tantalum proportions. Compared with a traditional uniform coating anode, the prepared component gradient iridium tantalum coating anode can relieve the stress concentration phenomenon and reduce coating cracking, the service life of the anode is remarkably prolonged, and the catalytic activity of the anode is remarkably improved; the modified carbon nano tube is added into the active layer precursor solution, so that the conductivity change caused by component gradient is improved, and the cell voltage of the component gradient iridium tantalum coating anode is effectively reduced; and moreover, the iridium content is lower, and the preparation cost of the electrode is reduced.

The invention discloses an anti-radiation aluminum-based layered composite board and an explosive welding method thereof, and belongs to the technical field of metal material welding. According to the method, aluminum or aluminum alloy serves as a base plate, tantalum or tantalum alloy serves as a compound plate, a titanium / titanium alloy middle transition layer is introduced, direct impact of explosive detonation on the compound plate is avoided through an aluminum protection plate, a powdery emulsion explosive is combined with an inert diluent to regulate and control energy parameters, and gaps between plates are accurately set based on the explosive welding window theory; and one-time forming metallurgical bonding of multiple layers of heterogeneous materials is achieved. The density of the obtained composite board is reduced by 40% compared with that of a traditional lead protection layer, and the composite board has the characteristics of radiation resistance, light weight, high strength and corrosion resistance and is suitable for manufacturing of spacecraft radiation protection layers and other deep space equipment.

The invention belongs to the field of nickel-based alloy materials, and discloses a precipitation hardening type nickel-based alloy welding wire and a preparation method thereof.The precipitation hardening type nickel-based alloy welding wire comprises, by mass, 50%-60% of nickel, 15%-20% of chromium, 15%-20% of iron, 2%-4% of molybdenum, 2%-5% of niobium, 0.01%-2% of tantalum, 0.2%-2% of aluminum, 0.5%-1.2% of titanium, 0.03%-0.08% of carbon, 0.1%-0.5% of manganese, 0.1%-0.5% of silicon, 0.01%-0.05% of magnesium, 0.01%-0.05% of yttrium, 0.5%-2% of tungsten, 0.1%-0.6% of cobalt, 0.001%-0.02% of boron and the balance impurities; according to the precipitation hardening type nickel-based alloy welding wire and the preparation method thereof, through component optimization and process innovation, the nickel-based alloy welding wire with high-temperature strength, excellent hot crack resistance and welding toughness is provided.

The invention provides a preparation method of an ultrahigh-temperature oxidation ablation resistant tantalum-based ceramic and silicon carbide composite thermal protection coating, which comprises the following steps: (1) mixing a polymer binder and a solvent to form a solution, and carrying out ball-milling mixing on the solution, a tantalum-containing compound, silicon carbide, silicon and other components to prepare precursor slurry; (2) uniformly coating the surface of a carbon substrate with the slurry obtained in the step (1) by a dip-coating method, and drying; (3) realizing curing and pyrolysis of the coating through segmented heat treatment; and (4) the coating is subjected to vacuum siliconizing treatment, and the composite thermal protection coating is obtained. According to the tantalum-based ceramic and silicon carbide composite thermal protection coating prepared through the method, the ultrahigh-temperature oxidation resistance, ablation resistance, thermal shock resistance and heat insulation performance of the coating are remarkably improved. After the coating is ablated for 2400s under oxyacetylene flame at the temperature of 1650 DEG C, the integrity and excellent thermal protection effect of the coating can still be kept.

The invention relates to the technical field of thermal printing head manufacturing, in particular to an energy-impact-resistant heating substrate for a thermal printing head and a preparation method of the energy-impact-resistant heating substrate, and the energy-impact-resistant heating substrate is high-temperature-resistant and capable of reducing adverse effects of thermal stress and is provided with an insulating substrate, a ground coat layer is arranged on the surface of the insulating substrate, and a heating resistor and an electrode wire are arranged on the ground coat layer. A protective layer covers the upper surfaces of the heating resistor body and part of the electrode lead, and the heating resistor body is characterized in that the heating resistor body is an energy-impact-resistant heating resistor body, the heating resistor body is made of a mixture of hafnium tantalum Hf / Ta alloy and SiC, the mass ratio of Hf to Ta in the hafnium tantalum alloy is (1-2): (8-9), the hafnium tantalum alloy accounts for 30-70% of the total mass of the heating resistor body, and the Hf / Ta alloy accounts for 30-70% of the total mass of the heating resistor body. The thickness of the heating resistor body is 10-500 nm, and the resistivity of the heating resistor body is 500-4000 E-8 omega.m.

The invention provides a preparation method of a high-performance titanium anode. The preparation method comprises the following steps: pretreating a titanium substrate; the preparation method comprises the following steps: coating a tantalum-containing solution on a titanium substrate, and carrying out drying, pre-sintering and oxidation treatment to form a Ta2O5 bottom layer; wherein the drying temperature ranges from 80 DEG C to 110 DEG C, and the drying time ranges from 8 min to 12 min; the presintering temperature is 450-550 DEG C, and the presintering time is 8-15 minutes; the oxidation treatment temperature ranges from 600 DEG C to 680 DEG C, and the oxidation treatment time ranges from 1.5 h to 2.5 h; the surface of the Ta2O5 bottom layer is coated with a Pt-Ti alloy solution, then sintering is conducted for 10-20 min at the temperature of 500-550 DEG C, and a middle layer is formed; the surface of the middle layer is coated with an Ir-Ta-Sn-Co-Mn solution for 3-5 times, sintering is conducted for 10-15 min at the temperature of 500-600 DEG C after each time of coating, and a surface active layer is formed; wherein the molar ratio of all metal components in the Ir-Ta-Sn-Co-Mn solution is as follows: Ir: Ta: Sn: Co: Mn is equal to 7.16: 4.5: 0.8: 0.8: (0.5-1.2). According to the preparation method of the high-performance titanium anode, through staged sintering, multi-layer component regulation and control and process optimization, the problems of insufficient coating compactness, matrix passivation and low Ir utilization rate are solved, and the technical effects that the strengthening life is larger than or equal to 20 days (40000 A / m), and the bath voltage reduction is larger than or equal to 10% are achieved. The invention further provides the high-performance titanium anode and application thereof.

The invention belongs to the field of metal materials, and particularly relates to a niobium alloy material which mainly comprises the following elements in percentage by weight: 4%-8.5% of tantalum, 4%-8.5% of tungsten, 1%-3% of molybdenum, 0.8%-2.5% of zirconium, 0-0.2% of carbon and the balance of niobium. The invention further relates to a method for preparing the niobium alloy material. The compactness of the niobium alloy material and the tensile property at the room temperature and the high temperature are obviously improved.

The invention relates to the field of coatings, and discloses a wear-resistant and corrosion-resistant high-entropy alloy composite coating and a preparation method thereof.The wear-resistant and corrosion-resistant high-entropy alloy composite coating is prepared by depositing functional high-entropy alloy composite powder on the surface of a base body in a laser cladding mode, the functional high-entropy alloy composite powder comprises high-entropy alloy powder, a modified additive and composite ceramic powder, the modified additive is prepared by using urea and titanium tetrachloride as raw materials, growing nano titanium nitride particles on the surface of a silicon carbide nanowire in situ to prepare a nano titanium nitride / silicon carbide nanowire composite material, and then coating a layer of nano titanium dioxide particles on the surface of the nano titanium nitride / silicon carbide nanowire composite material by using tetrabutyl titanate; and the composite ceramic powder is prepared by compounding zirconium carbide, niobium carbide, hafnium carbide and tantalum disilicide. The hardness, wear resistance and corrosion resistance of the high-entropy alloy coating are enhanced by adding the modified additive and the composite ceramic powder.

Tantalum powder, comprising pure tantalum powder or tantalum alloy powder, wherein the particle size distribution of the tantalum powder has the following characteristics: (1) Dv90 < 5 μm; and (2) Dv10 > 0.5 μm. The tantalum powder has a narrow particle size distribution and does not contain nanoscale ultrafine particles, and has high stability and a high utilization rate. The present invention further relates to a method for preparing tantalum powder.

The invention belongs to the technical field of geological prospecting evaluation, and discloses an ore body positioning method and a rapid sampling device for niobium-tantalum ore target region prediction and evaluation. According to the method, based on existing geological data, various geologic bodies in a 1: 250,000-1: 10,000 geological map are analyzed, distribution, form, invasion contact relation, formation times and other characteristics of alkaline rock masses are found out, and a favorable metallogenic area is delineated; a linear structure, an annular structure and alteration information are recognized through satellites and aerial images, and target area positioning is assisted; the method comprises the following steps: exploring and detecting ore-bearing rock mass and fracture structures through a magnetic method, delineating potential positions of ore bodies, and inferring geological attributes of abnormal sources in combination with geological data; measuring the total amount of gamma at different positions in the niobium-tantalum prediction target area by using radioactive detection equipment, and preliminarily judging the position of the niobium-tantalum ore according to a gamma abnormal result; and carrying out systematic sampling and assay analysis on the target area by using the rapid sampling device. By means of the method and device, the metallogenic geological condition and the prospecting prospect can be evaluated, and the exploration network degree is optimized.

A sensor comprising one or more metal oxides as sensor material is used to detect pathogen-derived VOCs, such as those released from an infected wound. The metal oxides can comprise one or more metal elements selected from aluminum, antimony, bismuth, boron, cerium, chromium, cobalt, copper, gold, indium, iridium, iron, lanthanum, lead, manganese, molybdenum, nickel, niobium, osmium, palladium, platinum, rhodium, ruthenium, selenium, silicon, silver, tantalum, tellurium, terbium, tin, titanium, tungsten, vanadium, ytterbium, yttrium, zinc, and zirconium. The sensor device can have one or more sensors that detect and record various VOCs indicative of the presence of pathogens, which are associated with mortality and / or infection.

The invention relates to the field of semiconductor device preparation, and provides a method for preparing a resistive layer of a variable resistance type memory based on laser pulse, which comprises the following steps: depositing a buffer layer on a bottom electrode layer of a pre-prepared variable resistance type memory, the material of the buffer layer comprising any one or more of tungsten, tantalum, nitrogen and boron; depositing a seed layer on the buffer layer; a target material is shot based on laser pulse shock, the target material is deposited on the seed layer to form a resistive layer, and the target material comprises any one or more of scandium, titanium, strontium, yttrium, lanthanum and barium and aluminum nitride. The method and the device are used for solving the defect of low read-write speed of the variable resistance type memory in the related technology, and the read-write speed of the variable resistance type memory can be improved based on preparation of the resistive layer by using aluminum nitride.

To provide an EUV mask blank which prevents damage to a multilayer reflective film due to dry etching using a halogen gas as an etching gas, and dry etching using an oxygen-based gas as an etching gas.SOLUTION: In a reflective mask blank for EUV lithography, a multilayer reflective film reflecting EUV light, a protective film for the multilayer reflective film, and an absorption layer absorbing EUV light are formed in this order. The protective film is made of rhodium (Rh) or a rhodium material including Rh and at least one element selected from the group consisting of nitrogen (N), oxygen (O), carbon (C), boron (B), ruthenium (Ru), niobium (Nb), molybdenum (Mo), tantalum (Ta), iridium (Ir), palladium (Pd), zirconium (Zr), and titanium (Ti).SELECTED DRAWING: None

The invention discloses a high-temperature-oxidation-resistant titanium-tantalum-zirconium-niobium high-entropy alloy material and a preparation method thereof, and relates to the technical field of high-temperature alloy materials. The titanium-tantalum-zirconium-niobium high-entropy alloy serves as a matrix, regulation and control elements oxygen and vanadium are introduced, directional optimization of oxidation resistance and mechanical performance is achieved, the oxidation rate reaches 8.1178 * 10 <-10 > mg < 2 >. Cm <-4 >. S <-1 > after the alloy is subjected to static oxidation for 24 hours at the temperature of 900 DEG C by doping oxygen, a compact and stable oxidation film is formed on the surface, and the high-temperature oxidation resistance is remarkably improved; and the room-temperature tensile property is improved by adding the vanadium element. The high-temperature-oxidation-resistant titanium-tantalum-zirconium-niobium high-entropy alloy material provided by the invention realizes directional optimization of performance and diversified expansion of a material system, and is suitable for application requirements in the fields of aerospace engine hot end parts, high-temperature structural parts and the like; the problems that an existing alloy is limited in oxidation resistance, insufficient in mechanical property and complex in preparation process are effectively solved.

The invention discloses a wear-resistant and corrosion-resistant rare earth copper alloy which comprises 0.05%-3% of titanium, 0.06%-1.4% of niobium, 0.06%-2% of tantalum, 0.1%-1.58% of chromium, 0.01%-0.2% of iridium, 0.12%-2.5% of molybdenum, 0.08%-0.8% of vanadium, 2.6%-4.8% of rare earth elements and the balance copper and inevitable impurities, the total weight percentage of all the raw materials is 100%, on the basis of a traditional alloy, a trace amount of titanium, niobium, tantalum, chromium, iridium, molybdenum, vanadium and rare earth elements are added, and the rare earth elements and the rare earth elements are evenly mixed. And the percentage content of each element in the copper alloy is adjusted, so that trace rare earth elements, titanium, niobium, tantalum, chromium, iridium, molybdenum and vanadium generate a synergistic effect, the crystal grains of the alloy can be refined, the microstructure of the material is improved, the wear resistance is improved, a firmer passive film can be formed, the corrosion resistance of the material in a severe environment is improved, and the service life of the material is prolonged. The alloy has high wear resistance and corrosion resistance, the strength and toughness of the alloy are improved, and the alloy has better performance under the dynamic load.

The invention relates to the technical field of semiconductor material preparation, and provides a TaC composite coating process based on a carbon nanostructure transition layer and a product thereof. The method comprises the following steps: a) pretreating the surface of a base material to form a groove, b) introducing a carbon source gas, carrying out first chemical vapor deposition under the action of a metal salt catalyst to grow carbon nanoparticles, and depositing the base material pretreated in the step a) to obtain a transition layer deposition base material, c) gasifying a tantalum source, mixing the gasified tantalum source with the carbon source gas, a reaction gas and a carrier gas, and carrying out second chemical vapor deposition to obtain the transition layer deposition base material. And second chemical vapor deposition is conducted, the transition layer deposition base material is filled with the fine grain particle layer, then deposition continues to be conducted on the surface of the transition layer deposition base material to form the coarse grain particle layer, and finally the TaC composite coating is obtained. According to the method, the compactness of the coating can be improved, the bonding strength of the coating and the base material is enhanced, the performance of the TaC composite coating is improved, the service life of the TaC composite coating is prolonged, and the reliability of the TaC composite coating is improved.

A multi-material structure includes a refractory portion with a metal or metal alloy of at least one of niobium (Nb), molybdenum (Mo), tantalum (Ta), tungsten (W), rhenium (Re), iridium (Ir), vanadium (V), and ruthenium (Ru). A structural portion is metallurgically joined with the refractory portion. The structural portion includes a titanium (Ti) alloy. At least one of the refractory and structural portions is additively manufactured.

The invention discloses a composite crucible for large-size AlN single crystal growth and a preparation method thereof, and belongs to the technical field of PVT method crystal growth. A heat conduction device is arranged in a cavity of the composite crucible and is composed of a plurality of high-purity graphite plates, the high-purity graphite plates are distributed at equal included angles to form a wing-shaped structure, the inner surface of the high-purity graphite crucible and the surfaces of the high-purity graphite plates are covered with a metal tantalum Ta layer or a TaC coating, and the high-purity graphite plates and the high-purity graphite plates are subjected to heat conduction under the temperature environment of 1800-2600 DEG C, so that the heat conduction effect of the high-purity graphite plates is improved. And TaC / C material layers are formed on the inner surface of the high-purity graphite crucible and the high-purity graphite plate. The heat conduction efficiency of the large-size crucible can be greatly improved, the problem that heat transfer from the side wall of the crucible to the source powder center is insufficient in the powder burning process can be remarkably solved, the uniformity of large-size AlN crystals is improved, thermal stress in crystal growth is relieved, and favorable conditions are created for preparing large-size and high-quality AlN single crystals.

The invention provides a comprehensive recovery method for tantalum, niobium and tin in lepidolite flotation tailings, and relates to the technical field of comprehensive utilization of resources. The method comprises the following steps: firstly, grading the lepidolite tailings, and carrying out flotation on the lepidolite tailings of which the particle size is less than 0.038 mm to obtain low-grade tantalum-niobium-tin concentrate; carrying out gravity separation, centrifugal separation and shaking table separation on the fraction of + 0.038-0.15 mm to obtain high-grade tantalum-niobium-tin concentrate; and after the particle size larger than 0.15 mm is subjected to reselection, ore grinding is conducted again, and ore grinding products are returned to the initial grading operation. The method is environment-friendly in process, the lepidolite flotation tailings can be effectively utilized, and the problem that the recovery rate of tantalum, niobium and tin is low is solved.

The invention relates to the technical field of electrical performance testing, and discloses a multi-class nonferrous metal breakdown voltage testing device, system and method. The testing device comprises a testing groove provided with a plurality of independent clamping grooves, a temperature and humidity regulation and control system, an electrode module, a power module and a data acquisition module, and high-precision breakdown voltage testing of multiple samples in a constant environment is achieved through multi-channel synchronous testing, temperature and liquid level dynamic control, symmetrical electrode layout and high-speed data acquisition. The system is integrated with a central control unit, the boosting rate is automatically set according to sample parameters, multiple channels independently boost and synchronously collect breakdown data, and a double-threshold algorithm is adopted to judge breakdown events in real time. The method comprises the whole process of solution preparation, sample installation, electric field optimization, boost control and data judgment. Compared with the prior art, the testing efficiency and the measuring precision are improved, the environmental interference is reduced, and the method is suitable for batch detection and quality control of tantalum, niobium and oxide materials of the tantalum, the niobium and the oxide materials of the tantalum and the niobium.

The invention relates to the technical field of cutting tools, and discloses a high-strength wear-resistant cutting tool and a preparation method thereof.The high-strength wear-resistant cutting tool is prepared from, by weight, 85-89.5 parts of tungsten carbide nanometer powder, 9-12 parts of cobalt powder, 0.5-1 part of chromium carbide, 1-2 parts of tantalum powder and 0-0.5 part of molybdenum powder, and the particle size range of the tungsten carbide nanometer powder is 50-100 nm. The synergistic effect of the tungsten carbide nano powder and the gradient cobalt content is accurately controlled, breakthrough improvement of the performance of a base material is achieved, the gradient structure design enables the surface layer of the material to obtain high hardness, meanwhile, the core part keeps fracture toughness, and the technical problem that a traditional homogeneous material cannot give consideration to high hardness and high toughness is solved. And the cutting tool can adapt to wider machining working conditions and material types.

Wrought age-hardenable nickel-chromium-cobalt based alloy compositions suitable for use in high temperature gas turbine cases possessing higher mechanical strength, toughness / containment, and thermal stability compared to current commercial alloys and an acceptable containment factor containing in weight percent 16 to 20 wt. % chromium, 8 to 13 wt. % cobalt, 4 to 8.5 wt. % molybdenum, up to 8 wt. % tungsten, 2.1 to 4.1 wt. % aluminum, titanium up to 1.9 wt. %, up to 3.7 wt. % niobium, up to 5 wt. % iron, carbon present up to 0.15 wt. %, up to 0.015 wt. % boron, up to 7.1 wt. % tantalum, up to 0.13 wt. % silicon, up to 1.0 wt. % manganese, and up to 0.06 wt. % zirconium, with a balance of nickel and impurities. The amounts of certain alloying elements must be carefully controlled according to three compositional relationships here disclosed.

A tantalum capacitor includes a tantalum body including a tantalum element including tantalum powder, a conductive polymer layer disposed on the tantalum element, and a tantalum wire penetrating through at least a portion of each of the tantalum element and the conductive polymer layer in a first direction, a molded portion including a fifth surface and a sixth surface facing in the first direction, a third surface and a fourth surface facing in a second direction, and a first surface and a second surface facing in a third direction and surrounding the tantalum body, a first coating layer disposed in at least a portion of an interface between the tantalum body and the molded portion, and a second coating layer disposed on the first coating layer, wherein the second coating layer is thicker than the first coating layer.

The invention discloses application of a composite film with a multi-element and multi-phase structure in surface lubrication of an aerospace vehicle or a nuclear power bearing in a high-temperature environment. The composite film comprises a titanium transition layer, a titanium / molybdenum disulfide / tantalum / tungsten diboride gradient transition layer and a multi-element and multi-phase structure layer which are sequentially formed on the surface of a base body. The multicomponent multiphase structure layer comprises a molybdenum disulfide / tantalum / tungsten diboride composite layer, the molybdenum disulfide / tantalum / tungsten diboride composite layer comprises tantalum nanoparticles, a molybdenum disulfide layer and a tungsten diboride layer, and the tantalum nanoparticles are distributed between the molybdenum disulfide layer and the tungsten diboride layer. The composite film with the multi-element and multi-phase structure shows higher hardness and hardness / elasticity ratio and low friction coefficient and wear rate at the high temperature of 400 DEG C, and meanwhile, the composite film can meet stable lubrication and long-life reliable service of aerospace vehicles and nuclear power bearings under harsh and complex variable working conditions.

A magnetic memory device including a tunneling magnetoresistance layer and a memory device including the magnetic memory device are provided. The magnetic memory device includes the tunneling magnetoresistance layer, including a free layer, a tunneling barrier layer, and a pinned layer, and a spin orbit torque (SOT) layer configured to provide a spin current to change a magnetization direction of the free layer of the tunneling magnetoresistance layer, wherein the SOT layer includes an orbital Hall conductance (OHC) material layer configured to provide an orbital Hall current and a conversion layer configured to convert the orbital Hall current of the OHC material layer into the spin current, and the OHC material layer includes at least one material of iridium (Ir), manganese (Mn), vanadium (V), chromium (Cr), niobium (Nb), molybdenum (Mo), ruthenium (Ru), tantalum (Ta), tungsten (W), and rhenium (Re), or an alloy thereof.

The invention provides a high-strength niobium alloy processing method, which relates to the technical field of alloy processing, and comprises the following steps: step 1, ingot casting preparation: niobium, tungsten, tantalum, molybdenum, zirconium and carbon are subjected to powder mixing and ingot casting to obtain a first alloy product; step 2, extrusion processing: heating the first alloy product by adopting a medium-frequency induction furnace, and carrying out extrusion treatment by adopting an extrusion ingot supply device to obtain a second alloy product; step 3, forging: performing intermediate annealing treatment on the extruded second alloy product twice by adopting a first annealing process in the forging process to obtain a third alloy product; wherein free forging treatment is carried out on the alloy product between the two times of intermediate annealing treatment; and (4) finished product processing: carrying out finished product annealing treatment on the third alloy product by adopting a second annealing process to obtain the final high-strength niobium alloy. Wherein in the second annealing process, the temperature is increased to 1200-1450 DEG C at the speed of 18-20 DEG C / min, and heat preservation is conducted for 60-120 min. According to the scheme, the strength of the niobium alloy can be improved.