150 results about "Binary alloy" patented technology

A overload protection switch with a reverse restart switching structure that has a seesaw lampshade provided with a protruding block which extending downward from the outside of the seesaw lampshade to ensure that the seesaw lampshade and the moving rod are accurately positioned in the ON and OFF positions in the housing to form a three-stage switching type with bidirectional positioning and forms an overload protection switch that can continuously maintain sufficient insulation distance and does not reduce the insulation distance due to fatigue decay of the binary alloy conductive plate.

A magnetoresistive random-access memory cell includes a substrate; a sub-monolayer nitride layer, outward of the substrate, having a sub-monolayer nitride layer thickness less than 10 Angstroms; and a templating layer, outward of the sub-monolayer nitride layer, and including a binary alloy having an alternating layer lattice structure. A Heusler layer is located outward of the templating layer. The Heusler layer includes a Heusler compound and exhibits perpendicular magnetic anisotropy (PMA). A tunnel barrier is outward of the Heusler layer, and a magnetic layer is outward of the tunnel barrier. In an alternative aspect, instead of the sub-monolayer nitride layer, a tantalum nitride layer with a thickness of ≤10 Angstroms+10% is employed.

The invention belongs to the field of light metal alloy smelting, and provides a preparation process of high-quality Mg-Li and Al-Li alloys with large smelting amount under normal pressure in order to meet the requirements of the market on high-quality magnesium-lithium and aluminum-lithium alloy large ingots, which comprises the following steps: firstly, preparing Li-Mg binary alloy elements from lithium salt and oxides of Ca, Mg and Al through reduction reaction; and the Li-Mg binary alloy element is smelted with a magnesium ingot or an aluminum ingot under normal pressure to obtain the corresponding Mg-Li or Al-Li alloy. According to the method, high-quality Mg-Li and Al-Li alloy large castings can be prepared under normal pressure, meanwhile, the yield of lithium is increased, electrolytic metal lithium is not needed to serve as a raw material for preparing magnesium-lithium or aluminum-lithium alloy, and therefore pollution caused by chlorine generated by traditional lithium electrolysis is avoided.

The invention provides a silicon carbide fiber reinforced ceramic-based composite material as well as a preparation method and application thereof, and belongs to the technical field of ceramic-based composite materials. The composite material comprises a silicon carbide fiber reinforced phase, a boron nitride interface layer and a silicon-based multiphase ceramic matrix from inside to outside, the silicon-based multiphase ceramic matrix comprises an infiltration reaction generation phase, an introduced ceramic particle phase and a silicon-containing binary alloy phase, and the infiltration reaction generation phase comprises a water-oxygen corrosion resistant phase, a silicon phase, a silicon carbide phase and a boride phase. The water oxygen corrosion resistant phase comprises a compound of boron and any element of yttrium, ytterbium, hafnium, molybdenum and aluminum, the boride phase comprises B12 (C, Si, B) 3, the bending strength of the composite material is larger than or equal to 600 MPa, and the fracture toughness of the composite material is larger than or equal to 19 MPa.m < 1 / 2 >. According to the preparation method, the matching property among the components of the composite material is optimized, the mechanical property of the composite material is improved, and a new thought and a process method are provided for preparing the high-strength and water-oxygen-corrosion-resistant ceramic matrix composite material.

A neuromorphic computing array includes horizontal lines and vertical lines that intersect the horizontal lines at cell locations. Magnetic tunnel junction cells are located at the cell locations. Each cell is electrically connected to a corresponding one of the horizontal lines and to a corresponding one of the vertical lines. Each cell includes a substrate, a seed layer overlying the substrate, and a nitride layer, overlying the seed layer, and optionally having a thickness greater than 5 Angstroms. Each cell further includes a templating layer, outward of the nitride layer, including a binary alloy having an alternating layer lattice structure, and having a thickness greater than 50 Angstroms. Each cell still further includes a magnetic layer overlying the templating layer, a tunnel barrier outward of the magnetic layer; and a magnetic layer outward of the tunnel barrier. The magnetic layer includes a Heusler compound and exhibits perpendicular magnetic anisotropy (PMA).

The invention discloses a design method and a preparation method of low-melting-point high-entropy liquid metal GaInSnBiZn, and belongs to the field of alloy research and development. The liquid metal alloy is formed by mixing five metal elements including Ga, In, Sn, Bi and Zn according to the equal atomic proportion, and aims at avoiding formation of intermetallic compounds and optimizing the microstructure through the high-entropy effect, and low melting point, high stability and good mechanical property of the alloy are achieved. The mixing enthalpy of the binary alloy and the formation enthalpy of the ternary alloy are calculated, thermodynamic analysis and phase diagram research are combined, the proportion of the five elements is determined, the high-entropy alloy is prepared through a vacuum arc melting method under the high vacuum condition, and the high purity and stability of the high-entropy alloy are ensured. The liquid alloy is low in melting point and high in stability, theoretical guidance and technical support are provided for design and preparation methods of novel liquid metal materials, some limitations in the prior art are overcome, and the liquid alloy has high practical application value.

The invention belongs to the technical field of catalyst preparation, and relates to efficient preparation of clean energy, in particular to an energy-saving hydrogen production system using a binary alloy catalyst formed by rare earth elements under the assistance of ethanol. The preparation method comprises the following steps: uniformly mixing metal precursors of palladium and lanthanum, molybdenum hexacarbonyl and an n-caprylic acid solvent by adopting a wet chemical synthesis method, carrying out an oil bath reaction for a period of time, separating precipitates, and sequentially washing and drying to obtain the binary alloy catalyst. The improvement and promotion effects of ethanol on a traditional water electrolysis hydrogen production system are researched in an H-shaped electrolytic tank, and it is proved that ethanol-assisted hydrogen production is an efficient and energy-saving hydrogen production mode. The preparation method of the catalyst is simple, has few steps and is simple and convenient to operate. Compared with a Pd metal alkene catalyst and commercial Pd black, the catalyst provided by the invention has more excellent catalytic activity and stability. The hydrogen production mode is more efficient, and energy consumption is greatly reduced.

A neuromorphic computing array includes horizontal lines and vertical lines that intersect the horizontal lines at cell locations. Magnetic tunnel junction cells are located at the cell locations. Each cell is electrically connected to a corresponding one of the horizontal lines and to a corresponding one of the vertical lines. Each cell includes a substrate (1401), a seed layer (1403) overlying the substrate, and a nitride layer (1403A) overlying the seed layer, and optionally having a thickness greater than 5 Angstroms. Each cell further includes a templating layer (1403B) outward of the nitride layer, including a binary alloy having an alternating layer lattice structure, and having a thickness greater than 50 Angstroms. Each cell still further includes a first magnetic layer (1405) overlying the templating layer, a tunnel barrier (1409) outward of the first magnetic layer; and a second magnetic layer (1411) outward of the tunnel barrier. The first magnetic layer (1405) includes a Heusler compound and exhibits perpendicular magnetic anisotropy, PMA.

The invention discloses a magnesium-based composite material with high hydrolysis hydrogen production conversion rate and a preparation method thereof, belonging to the technical field of hydrogen production materials and their preparation processes. The preparation method comprises the following steps: step 1, preparing a Mg-Ca binary alloy; step 2, mechanically crushing the obtained Mg-Ca binary alloy to obtain Mg-Mg 2 Ca alloy particles; step three, then in Mg-Mg 2 Mg-Mg 2 Ca-composite metal carbide-Ni composite powder; Step 4, Mg-Mg 2 The Ca-composite metal carbide-Ni composite powder is placed in a tableting mold and pressed into a block or sheet material using a tablet press to obtain a magnesium-based composite material with a high hydrolysis hydrogen production conversion rate. The preparation process of the present invention is simple, low in cost, and short in time. The composite material can quickly prepare a large amount of hydrogen with a high conversion rate and is suitable for industrial production.

The invention discloses a preparation method of a titanium alloy cast ingot and a product, which can be used for producing a Ti1350 titanium alloy large-size cast ingot with a diameter specification of phi 500mm-phi 780mm and uniform chemical components, and is suitable for industrial production. The method comprises the following steps: (1) selecting a small-granularity binary alloy as a raw material; (2) preparing an electrode block: pressing the electrode block by adopting an automatic mixing material and a large-tonnage vertical oil press; (3) electrode welding: stacking a plurality of electrode blocks, and welding by adopting argon protection of a vacuum plasma welding box to obtain a consumable electrode; (4) primary smelting: carrying out auxiliary electrode welding and smelting on the consumable electrode in a vacuum consumable electrode furnace; (5) secondary smelting is conducted, specifically, the cast ingot obtained after primary smelting is turned around and loaded into a furnace, and secondary smelting is conducted after auxiliary electrode welding; (6) third-time smelting: turning around the cast ingot subjected to the second-time smelting, charging into a furnace, welding with an auxiliary electrode, and then smelting for the third time; and (7) machining and cutting off a riser to obtain a finished cast ingot.

The invention belongs to the technical field of hydrogen evolution catalysts, and particularly relates to an amorphous metal hydrogen evolution catalyst, a preparation method and application. The preparation method comprises the steps that metal nickel serves as a working electrode, binary alloy powder of different proportions serves as a precursor, the binary alloy powder is sprayed to the surface of the metal nickel, and a first intermediate electrode is obtained; reducing the binary alloy powder on the surface of the metallic nickel into metal to obtain a second intermediate electrode; taking the second intermediate electrode as a substrate to obtain a metallic nickel loaded binary metal / amorphous metal electrode; the binary metal / amorphous metal loaded on the metallic nickel in the metallic nickel loaded binary metal / amorphous metal electrode is the amorphous metal hydrogen evolution catalyst. The problems that an existing hydrogen evolution catalyst is high in cost, poor in hydrogen evolution catalytic activity and low in stability are solved, the prepared amorphous metal hydrogen evolution catalyst has excellent hydrogen evolution catalytic activity and long-time stability, and the excellent hydrogen production effect can be achieved in the electro-catalysis hydrogen evolution process.

The invention discloses a method for preparing a polymer / nano-porous copper composite material, and belongs to the technical field of metal materials. The method comprises the following steps that pure copper and pure manganese are prepared in proportion and smelted, and Mn-Cu binary alloy is prepared; carrying out homogenizing annealing treatment on the obtained alloy to form a gamma single-phase alloy; recrystallization annealing and aging heat treatment are carried out on the gamma single-phase alloy, so that an alpha phase is separated out, and an alpha / gamma double-phase alloy is generated and serves as a precursor material; the method comprises the following steps: putting an alpha / gamma dual-phase alloy into a solution containing enough acid, and removing an alpha phase through selective phase corrosion to form a macroporous structure; carrying out vacuum impregnation and curing on the formed macropores by utilizing a high polymer material; and then the material is placed in a stronger acid solution, free corrosion or electrochemical corrosion is carried out to enable the gamma phase to be dealloyed to generate nano-pores, and therefore the macromolecule / nano-porous copper composite material is obtained. According to the composite material, a large surface area and excellent toughness are kept, and meanwhile, the proportion of the nano-porous copper to the high polymer material can be widely adjusted.

The present invention relates to the technical field of iron and steel metallurgy, and discloses a steelmaking alloy yield prediction method and system based on alloy pulverization, the method comprising obtaining alloy composition data, steelmaking process parameters and alloy particle size distribution data; calculating the binary alloy pulverization rate according to the alloy composition data and the alloy particle size distribution data in combination with a binary alloy pulverization rate formula; performing alloy pulverization degree analysis according to the binary alloy pulverization rate to obtain an alloy pulverization degree factor; inputting the alloy pulverization degree factor, the alloy composition data and the steelmaking process parameters into a pre-trained alloy yield prediction model, and outputting a predicted alloy yield. The method can improve the accuracy of alloy yield prediction.

The application discloses an accident-tolerant nuclear fuel cladding coating and a preparation method and application thereof, and belongs to the technical field of nuclear fuel cladding coating. The coating is a Cr-based binary alloy coating deposited on the surface of a zirconium alloy base, and is selected from Cr-Fe, Cr-V or Cr-Mo alloy coatings, wherein the content of Fe is 3-10 wt%, the content of V is 3-20 wt%, and the content of Mo is 1-5 wt%. The preparation method adopts a magnetron sputtering process, and is realized by controlling parameters such as vacuum degree, temperature, gas pressure, bias voltage and power. Through alloying, the application effectively inhibits the element interdiffusion between the coating and the zirconium alloy base at high temperature, reduces the formation of brittle intermetallic compounds and Kirkendall holes, significantly improves the thermal stability and service life of the coating under accident conditions, meanwhile, the process is mature, the coating quality is high, and the coating is suitable for surface protection of zirconium alloy fuel cladding of nuclear power stations.

Provided are: a sputtering target configured to suppress trouble that could occur at the time of sputtering; and a method for manufacturing the same. The sputtering target contains a binary alloy of Cu and Al, with the balance being unavoidable impurities. The content (at%) of Cu and Al satisfies the condition of: 0.48 ≤ Al / (Cu + Al) ≤ 0.70; and further satisfies at least one of conditions (1)-(3). Condition (1): 0.48 ≤ Al / (Cu + Al) < 0.55, and the area ratio of pores in the field of view when observed by SEM being 2.0% or less. Condition (2): 0.55 ≤ Al / (Cu + Al) ≤ 0.70, and the area ratio of pores in the field of view when observed by SEM being 1.0% or less. Condition (3): the oxygen content of the sputtering target is 1000 ppm by mass or less, and the bending strength of the sputtering target is 70 MPa or more.

The application provides a magnesium-gadolinium binary alloy fuel powder and a preparation method and system thereof. The mass content of gadolinium in the magnesium-gadolinium binary alloy fuel powder is 6-30%, the density is 2.11-3.59 g / cm 3 , and the mass heat value is 20.01-24.06 kJ / g. The preparation method comprises the following steps: under the condition of argon positive pressure, melting the metal containing magnesium and gadolinium in a manganese steel crucible smelting furnace, conveying the obtained magnesium-gadolinium binary alloy liquid to a tightly coupled gas atomization tank for atomization through a stainless steel conveying pipe, and obtaining the magnesium-gadolinium binary alloy fuel powder after screening. The system comprises a smelting furnace, a tightly coupled gas atomization tank, a liquid conveying pipeline, a mechanical screening machine, an air flow sorting machine and a high-pressure argon tank. The application solves the phase segregation caused by the high density difference between magnesium and gadolinium in the magnesium-gadolinium alloy atomization powder preparation, and the safety problem caused by the volatility of magnesium, and the prepared magnesium-gadolinium alloy powder has a uniform metallographic structure and no serious segregation.

A magnetoresistive random-access memory cell includes a templating layer, including a binary alloy having an alternating layer lattice structure, and a half metallic Heusler multilayer structure including a plurality of layers of two different Heusler compounds, at least one of which is half metallic. The half metallic Heusler multilayer structure is located outward of the templating layer and exhibits perpendicular magnetic anisotropy (PMA). A tunnel barrier is outward of the half metallic Heusler multilayer structure, and a magnetic layer is outward of the tunnel barrier.

The invention provides a method for detecting the content of zinc in a lithium-zinc binary alloy strip based on ICP-OES, and belongs to the technical field of metal material component analysis. According to the method, the lithium matrix is separated by adopting a nitric acid-perchloric acid digestion system, and the stock solution is diluted by 500 times, so that the concentration of the lithium matrix can be efficiently reduced, meanwhile, the signal inhibition effect is effectively eliminated by combining lithium salt matching, and the detection precision is greatly improved. According to the method, Zn 213.856 nm analysis spectral lines are carefully selected, RF power is optimized, spectral interference of other elements can be avoided, the linear range can be expanded, and the method is suitable for rapid determination of the zinc content of 1%-20%. According to the method, the detection limit can reach 0.01%, the relative standard deviation is smaller than or equal to 1.0%, the recovery rate is 98.5%-101.2%, and high-precision detection is achieved.

The invention discloses a preparation method of a compact gamma-TiAl alloy sheet, which comprises the following steps: firstly, obtaining an Al-Ti-Al three-layer composite plate, then thinning the Al-Ti-Al composite plate to a target thickness through a rolling and recrystallization annealing circulating process, and finally, carrying out zero-pressure low-temperature and high-temperature reaction annealing treatment to synthesize the compact gamma-TiAl alloy sheet. According to the preparation method, holes in the TiAl3 phase are fundamentally avoided, and the compact and hole-free gamma-TiAl binary alloy plate can be prepared only by performing non-pressure reaction annealing treatment in a common atmosphere furnace or a vacuum heat treatment furnace. Besides, pressure does not need to be applied in the annealing process, the Al-Ti-Al composite thin plate can be pre-machined into a part in a complex shape, then the part is reacted and annealed to be synthesized into a compact gamma-TiAl alloy plate product, and the purpose that synthesis is conducted after forming is truly achieved.

The invention discloses a reaction device for preparing NiB binary alloy through magnesiothermy rapid reduction, and relates to the technical field of alloy preparation, the reaction device comprises a rotary drum, the rotary drum is rotatably erected on a supporting seat, and the driving end of the rotary drum is provided with a rotation driving assembly used for driving the rotary drum to rotate along the axis of the rotary drum in a transmission mode; the heating assembly is arranged outside the rotary drum, and the heating assembly is used for heating materials in the rotary drum; the material shoveling assembly is arranged in the rotary drum and comprises a material shoveling plate, a material guiding plate and a material shoveling driving assembly, the output end of the material shoveling driving assembly is in transmission connection with the material shoveling plate, and the material shoveling driving assembly is used for driving the material shoveling plate to be switched between a material shoveling terminal position and an initial position; when the material shoveling plate moves to the material shoveling terminal position from the initial position in the rotating direction of the rotary drum, the material shoveling plate shovels away the ultrahigh part of the materials accumulated in the rotary drum, and the ultrahigh part is guided and conveyed to the position behind the materials in the rotary drum through the material guiding plate. The reaction device prevents excessive accumulation of materials.

The application discloses a preparation method of high-strength Mg-Gd binary alloy rod material, comprising the following steps: alloy smelting: preparing Mg-Gd alloy; solid solution treatment: carrying out solid solution treatment on the Mg-Gd alloy obtained by smelting; preliminary extrusion: extruding the Mg-Gd alloy blank after the solid solution treatment at 380-440 DEG C, the extrusion ratio is 6-12, the extrusion speed is 0.2-2 mm / s, and a preliminary extrusion rod material is obtained; secondary extrusion: extruding the preliminary extrusion rod material at 300-340 DEG C, the extrusion ratio is 4-9, the extrusion speed is 0.1-1 mm / s, and a secondary extrusion rod material is obtained; aging treatment: aging the secondary extrusion rod material to a peak aging state, and high-strength Mg-Gd binary alloy rod material is obtained. According to the preparation method, the aging type Mg-Gd binary alloy rod material with high strength and good plasticity is obtained.

The invention relates to the technical field of alloy raw material mixing, and discloses a NiB binary alloy raw material mixing device, the raw material mixing device comprises a reaction kettle, a stirrer and a filler port, the stirrer is installed at the bottom of the reaction kettle, stirring and mixing are generated in the reaction kettle, the filler port is formed in the side wall of the reaction kettle, and the filler port is communicated with the stirrer. A temperature control assembly capable of switching heating and cooling is arranged on the outer side of the reaction kettle, a temperature control system capable of switching a circulating medium is constructed on the outer side of the reaction kettle on the basis of the jacket, and compared with a single temperature control medium in conventional equipment, a very stable effect can be achieved during temperature control; the chemical nickel plating process requiring accurate temperature change is more friendly, in addition, the setting form that the jacket wraps the medium for temperature conduction is adopted, so that the acting part is very uniform during temperature control, more accurate temperature control can be provided, and good product production is ensured.

The present invention relates to the technical field of arc additive manufacturing, and particularly to a method for additive manufacturing of heterogeneous dual-wire arc of NiTi-based shape memory alloy. The manufacturing method is to feed NiTi alloy wire and metal wire simultaneously through a dual-wire arc additive device, and use an ultra-high frequency pulsed TIG welding power source to realize the additive manufacturing of heterogeneous dual-wire arc of NiTi-based shape memory alloy. The present invention is used to solve problems such as low phase transformation temperature and large phase transformation hysteresis in existing arc additive manufacturing technology. Moreover, the ultra-high frequency pulsed TIG arc can improve the microstructure morphology, thereby being beneficial to stabilizing and improving the performance of NiTi-based alloys, broadening the application fields of NiTi-based ternary alloys, and providing an effective solution for arc additive manufacturing of NiTi-based shape memory alloys.

The present invention relates to a catalyst system comprising more than one catalyst network, wherein at least one of the catalyst networks contains at least one noble metal wire consisting of a binary PtRh alloy. The binary PtRh alloy consists of 3.4-4.6 wt. % of rhodium, impurities and the remainder platinum. The catalyst system does not comprise a catalyst network containing a noble metal wire made of a further binary PtRh alloy comprising more than 7 wt. % of rhodium. The invention also relates to a method for the catalytic oxidation of ammonia, in which a catalyst system according to the invention is used.

The application discloses a strain-induced supersaturated solid solution analysis method for a non-miscible alloy system based on mixed entropy evolution, and the method comprises the following steps: for a target A-B binary alloy, a mixed entropy-component relationship diagram of the target A-B binary alloy is drawn; the average component and the initial equilibrium phase component point of the target A-B binary alloy are calibrated in the diagram; based on the increase of the mixed degree of the entropy generation driving force, the two-phase components are predicted to evolve in the entropy increase direction during a severe plastic deformation process, until a single-phase supersaturated solid solution is formed. Based on the irreversible thermodynamic principle, the severe plastic deformation process is defined as a continuous external entropy generation source for driving the evolution of the system, through the analysis of the dynamic competition mechanism of element mixing and element demixing dominated by the entropy generation source, the formation mechanism of the supersaturated solid solution is revealed, and the application provides a universal theoretical tool for understanding and predicting the supersaturated solid solution behavior of the non-miscible alloy system under the severe plastic deformation.

The invention relates to the technical field of chemical synthesis and preparation, and discloses a NiB binary alloy preparation technology and system.The NiB binary alloy preparation system comprises an ultrasonic oscillation mechanism, an ultrasonic oscillation mechanism, a control module and a control module, and the ultrasonic oscillation mechanism comprises a control terminal and an ultrasonic oscillation groove; the chemical reaction mechanism comprises a supporting plate and a reduction reaction mechanism which are arranged on the ultrasonic oscillation tank, and a stirring mechanism, a mixing mechanism I and a mixing mechanism II which are arranged on the supporting plate; the reduction reaction mechanism comprises a tank body connected to the ultrasonic oscillation tank, a first constant-speed flow guide assembly and a second constant-speed flow guide assembly, wherein the first constant-speed flow guide assembly and the second constant-speed flow guide assembly are arranged on the supporting plate. According to the method, the reversed-phase micro-emulsions with different components can be automatically prepared, finally, the reversed-phase micro-emulsions with the different components are collected to be subjected to the reduction reaction, the NiB amorphous alloy is generated, the NiB amorphous alloy can be conveniently taken out from the top-suspension waste liquid obtained after the reaction, the top-suspension waste liquid does not need to be discharged firstly and then taken, and the cost is reduced. And the production efficiency and the preparation precision can be effectively improved.

The present invention discloses a method for evaluating the breakdown delay and jitter performance of gas switches, relating to the technical field of gas switches. By searching for data on the melting point, density, specific heat capacity, and work function of electrode materials and calculating changes in the work function of binary alloy materials, the method can directly evaluate the breakdown delay and jitter performance of different electrode materials. Compared with previous methods that required extensive experimental comparisons of the breakdown delay and jitter performance of gas switches made of different electrode materials, this method can significantly reduce work time and workload, thereby improving experimental efficiency and reducing experimental costs.

The invention discloses an alloy nanoparticle catalyst for a water electrolysis hydrogen evolution reaction. The alloy nanoparticle catalyst is characterized in that the catalyst is PtFe alloy nanoparticles. The PtFe alloy catalyst is nano-particles with uniform size, and the particle size of the nano-particles is 2-5 nm. The content of Pt is 28%-42%, and the content of Fe is 58%-72%. A one-step hydrothermal synthesis method is adopted, transition metal Fe is introduced through an alloy strategy, Pt-based binary alloy nanoparticles are synthesized, and the particle size is about 2-5 nm. By testing an X-ray diffraction spectrum, the crystal configuration is face-centered cubic. The corresponding overpotential of the PtFe alloy nanoparticles under the current density of 10 mA cm <-2 > is 25 mV, which is superior to that of commercial Pt / C (32 mV), so that the PtFe alloy nanoparticles are more favorable for promoting the hydrogen evolution reaction of electrolyzed water. After 20,000 cycles of cyclic stability tests, the activity of the PtFe alloy nanoparticles is only reduced by 4%, and commercial Pt / C is reduced by 20%. In a constant-current stability test, the voltage of the PtFe alloy nanoparticles is almost unchanged within 100 hours, and commercial Pt / C is reduced by 14%. The catalyst not only has good catalytic activity, but also has excellent stability.

The invention discloses a composite processing preparation method for synergistically enhancing the strength-plasticity of a heterostructure Mg-Sn alloy, and relates to the field of metal material processing, and the composite processing preparation method specifically comprises the following steps: S1, preparing an as-cast alloy; s2, solution treatment; s3, extrusion processing; and S4, rolling machining is conducted. According to the preparation method, a special mold does not need to be designed, other alloy elements do not need to be added, and the strength-plasticity of the binary Mg-Sn alloy can be synergistically improved only through direct extrusion and rolling.

A magnetoresistive random-access memory cell includes a substrate; a seed layer outward of the substrate; a resistive layer outward of the seed layer; and an ultra-thin templating layer. The ultra-thin templating layer is outward of the resistive layer, and includes a binary alloy having an alternating layer lattice structure. The ultra-thin templating layer has a thickness of 7-30 Angstroms. A Heusler layer is located outward of the ultra-thin templating layer, includes a Heusler compound, and exhibits perpendicular magnetic anisotropy (PMA).