16 results about "Binary alloy" patented technology

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.

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 application discloses a self-lubricating porous copper-based oil-containing bearing material and a preparation method, application and bearing containing the material thereof, and the preparation method comprises the following steps: material pretreatment: reducing and drying treatment is performed on copper-tin binary alloy powder; mold pressing and sintering forming: the pretreated copper-tin binary alloy powder is sequentially subjected to mold pressing preforming and near-melting-point sintering treatment, and a porous copper-tin binary alloy blank is obtained; borax immersion treatment: the blank is placed in a container containing a borax aqueous solution, and is sequentially immersed under vacuum and normal pressure conditions, and is dried and solidified, so that a borax film is formed on the inner wall of the pores of the blank; gradient solid solution treatment: the blank after the borax immersion treatment is subjected to two-stage temperature rising heat treatment in a protective atmosphere, and is rapidly cooled to room temperature, and a self-lubricating porous copper-based oil-containing bearing material is obtained, the preparation method is simple and efficient, the heat energy consumption is greatly reduced, and the prepared bearing material has a stable porous gap structure and has the characteristics of self-lubrication and high strength and toughness.

A magnetoresistive random-access memory cell includes a templating layer. The templating layer includes a binary alloy having an alternating layer lattice structure. The cell further includes a half metallic Heusler layer including a half metallic Heusler material having a tetragonal lattice structure. The half metallic Heusler layer is located outward of the templating layer, and has a Heusler in-plane lattice constant that is different from an in-plane lattice constant in a cubic form of the half metallic Heusler material. A tunnel barrier is located outward of the half metallic Heusler layer, and a magnetic layer is located outward of the tunnel barrier.

This invention belongs to the technical field of lead-free solder powder for electronic soldering. The invention discloses a graphene-coated copper-tin composite solder powder and its preparation method. The core phase is a CuSn binary alloy powder, with a Cu content of 0.5~1.0 wt% and the balance being Sn; the D50 particle size is 15~45 μm, approximately spherical, and the loose packing density is 4.8~5.2 g / cm³. 3，壳相：少层还原氧化石墨烯，连续致密包覆层厚度 The graphene coating is 0.8~3.0nm, with a coating amount of 0.03~0.22wt% (based on the total mass of the composite solder powder). The interface is that the core phase and the shell phase are covalently bridged by silane coupling agent, with a coating integrity rate of ≥95%. The graphene does not agglomerate or fall off, and it plays a stable role in the reflow soldering process. The wettability, solder joint strength, and thermal fatigue performance of the solder powder reach or exceed those of SAC305 silver-containing solder powder. The process conditions are mild, highly controllable, and have good repeatability, making it suitable for large-scale industrial production. Moreover, the preparation process is environmentally friendly and generates no harmful waste.

A neuromorphic computing array includes horizontal lines and vertical lines, with the vertical lines intersecting the horizontal lines at cell locations. Magnetic tunnel junction cells are located at the cell locations. Each cell is electrically connected to a corresponding horizontal line and a corresponding vertical line. Each cell includes a substrate (1401), a seed layer (1403) covering the substrate, and a nitride layer (1403A) covering the seed layer (optionally, the nitride layer has a thickness greater than 5 angstroms). Each cell also includes a template layer (1403B) located outside the nitride layer, the template layer comprising a binary alloy having an alternating layered lattice structure and having a thickness greater than 50 angstroms. Each cell also includes a first magnetic layer (1405) covering the template layer, a tunnel barrier (1409) located outside the first magnetic layer, and a second magnetic layer (1411) located outside the tunnel barrier. The first magnetic layer (1405) comprises a Hessler alloy and exhibits perpendicular magnetic anisotropy (PMA).

The application relates to the field of metallurgical and plastic processing of biomaterials, and provides a biodegradable Zn-Mg binary alloy and a preparation method and application thereof. The biodegradable Zn-Mg binary alloy is prepared by adopting a method of smelting-semi-continuous casting-forging-rolling-reverse extrusion and taking metal Zn and Zn-Mg intermediate alloy as raw materials. The Zn-Mg binary alloy prepared by the application has good mechanical properties, and the strength and ductility can meet the requirements of medical implant devices. Meanwhile, the Mg is added in the form of Zn-Mg intermediate alloy, so that the burning loss of the Mg can be effectively controlled, and the uniformity of the alloy composition and structure is improved. Further, high-purity raw materials are selected, and high-purity graphite crucibles are adopted for smelting, so that the heavy metal content in the Zn-Mg binary alloy is effectively controlled, the contents of Pb, As and Cd reach the standard of drinking water, and the safety of the Zn-Mg binary alloy implant in the body is ensured.

The application discloses a kind of for improving the regulation and control method of riser material fracture toughness, including inclusion element content control, slab banded structure element content control, sulfide inclusion formation element sulfur control, and oxygen element content control, it is characterized by: RH vacuum after-feeding line makes the content of Mg, Al in steel satisfy the following relationship: w Mg Satisfy 2.2x10 ‑3 W Al +2.2x10 ‑6 Between 5.7x10 ‑3 W Al +1.2x10 ‑5 Between, wherein Mg and Al exist in the form of binary alloy particles, when the slag basicity reaches between 5-7.The application has the advantages of reducing harmful inclusions while converting them into beneficial inclusions, achieving the synergistic improvement of high strength and high toughness, refining the grain structure, and improving the low temperature toughness and fracture toughness of the material.

The present application relates to the field of light metal alloy smelting. To meet market requirements for high-quality large ingots of magnesium-lithium (Mg-Li) and aluminum-lithium (Al-Li) alloys, the present application provides a preparation process for high-quality Mg-Li and Al-Li alloys with large melting capacity under atmospheric pressure. First, a Li-Mg binary alloy element is prepared by means of a reduction reaction between a lithium salt and oxides of Ca, Mg and Al, and the Li-Mg binary alloy element is melted with a magnesium ingot or an aluminum ingot under atmospheric pressure to obtain a corresponding Mg-Li or Al-Li alloy. According to the method of the present application, high-quality Mg-Li and Al-Li alloy large castings can be prepared under atmospheric pressure, and moreover, the yield of lithium is improved. Metal lithium produced by electrolysis is not used as a raw material for preparing the Mg-Li or Al-Li alloy, thereby avoiding the pollution caused by chlorine generated by conventional lithium electrolysis.

A two-type nanoparticle-reinforced Al-Cu binary alloy and its preparation method are disclosed. The preparation method includes the following steps: A) Prepare a cast Al-Cu binary alloy with a mass percentage of 2-10% Cu, unavoidable impurity element content ≤0.1%, and the remainder being Al; B) Anneal the cast Al-Cu binary alloy; C) Hold the Al-Cu binary alloy at 300-450℃ for 2-4 hours, and then perform hot extrusion at a temperature of 300-450℃, an extrusion speed of 0.1-5 mm / s, and an extrusion ratio of 9-30:1. D. Place the Al-Cu binary alloy in a heat treatment furnace and heat it to 530-630℃ for semi-solid isothermal treatment, holding it at that temperature for 0.1-3 hours, followed by water quenching. E. Hold the Al-Cu binary alloy at 150-250℃ for 0.5-2 hours, then perform a secondary extrusion at a temperature of 150-250℃, an extrusion speed of 0.1-5 mm / s, and an extrusion ratio of 9-30:1 to obtain a nanoparticle-reinforced Al-Cu binary alloy. F. Perform aging treatment on the nanoparticle-reinforced Al-Cu binary alloy to obtain the final product. The Al-Cu binary alloy prepared by the above method possesses excellent yield strength, tensile strength, and elongation.

This invention discloses a high-density, high-elongation tungsten-nickel binary alloy material and its step-hot isostatic pressing (HIP) preparation method, belonging to the field of powder metallurgy binary alloy technology. The alloy material has the following mass percentages: W: 93-98%, Ni: 2-7%. The preparation method includes the following steps: pre-mixing tungsten powder and nickel powder in an acoustic resonance mixer, followed by inert atmosphere ball milling in an omnidirectional planetary ball mill; pressing the uniformly mixed powder into a green blank using cold isostatic pressing; densifying the green blank using a step-hot isostatic pressing sintering process, achieving microstructure optimization through multi-stage temperature-pressure synergistic control; and finally, vacuum oil quenching of the sintered alloy. This invention, by combining binary component ratio optimization with a step-hot isostatic pressing sintering process, solves the problems of coarse grains, insufficient elongation, and uneven density in traditional tungsten-nickel alloys. While ensuring high specific gravity, it achieves simultaneous improvement in strength and elongation. The process is simple and controllable, suitable for industrial mass production.

This invention discloses a method for preparing ruthenium-nickel nano-alloy electrocatalytic materials supported on a carbon-nitrogen support and their applications. Melamine is dispersed in an organic solvent and stirred until homogeneous. Then, 1,5-diaminopentane is added and stirred until homogeneous to obtain solution A. Ruthenium and nickel salts are added to the organic solvent and ultrasonically treated to obtain solution B. Solution B is slowly poured into solution A and stirred to react. After the reaction, the mixture is allowed to stand until a stable precipitate forms. The obtained precipitate is separated, washed, and dried to obtain a powdered precursor. The powdered precursor is subjected to a pyrolysis reaction to obtain a primary catalytic material. The obtained primary catalytic material is immersed in hydrochloric acid solution and dried to constant weight to obtain a carbon-nitrogen supported ruthenium-nickel nano-alloy electrocatalytic material, i.e., a binary alloy Ni. x Ru 2‑x / NC catalyst. The catalyst prepared by this invention exhibits extremely excellent catalytic performance in acidic, neutral, and alkaline water electrolysis hydrogen evolution reactions, and its hydrogen evolution activity is significantly superior to that of commercial platinum-carbon catalysts.

This invention belongs to the field of soft magnetic materials technology, and discloses a high-performance Fe-Y-B ternary amorphous soft magnetic alloy thin strip based on trace yttrium purification of the melt to inhibit surface crystallization and its preparation method. The atomic percentage composition of this alloy satisfies Fe (85‑x) Y x B 15 (0.5≤x≤3.0) or Fe 85 Y y B (15‑y) (0.5≤y≤3.0). This invention introduces trace amounts of rare earth element Y into a Fe-B binary alloy. Utilizing the high affinity of Y for impurity elements in the melt, compounds are formed during the smelting process and floated to the surface for removal, thus deeply purifying the melt. This fundamentally eliminates the nucleation sites for heterogeneous α-Fe on the thin strip surface during rapid quenching, completely suppressing surface crystallization. The resulting alloy thin strip possesses a completely amorphous structure, maintaining high saturation magnetic induction while exhibiting high amorphous formation capability, extremely low coercivity, and high effective permeability. This invention features a simple composition and good process compatibility, solving the problem of simultaneously achieving surface crystallization and soft magnetic properties in high-iron-content Fe-based amorphous alloys.

The application provides a kind of electrocatalyst of CuPd binary alloy supported on Vulcan carbon and its preparation method and application, and relates to the technical field of electrocatalyst.The CuPd alloy structure is synthesized by one-step solvothermal method, the synergistic catalytic effect of Pd and Cu is realized, the crystal form is controlled by introducing halide, and the CuPd nanocrystal clusters are supported on the surface of Vulcan carbon by ultrasonic technology, so that the high-activity and high-stability electrocatalytic material is obtained, which not only enhances the adsorption and activation of NO3 ‑ , but also improves the supply capacity of H, thereby significantly improving the generation efficiency and selectivity of NH3.The preparation method of the application is simple, controllable in cost, low in energy consumption, mild in conditions, and good in product morphology;The electrocatalyst of CuPd binary alloy supported on Vulcan carbon obtained by the application has good catalytic activity and stability under alkaline conditions, realizes a Faraday efficiency of more than 85%, and the current is stable for more than 10 hours in I-T test under neutral conditions.

The application provides a magnesium-lithium binary alloy fuel powder and a preparation method thereof. The magnesium-lithium binary alloy fuel powder contains 3-20% of lithium in mass, preferably 3-15%, and the sphericity is not less than 95%. The preparation method comprises the following steps: under the condition of argon positive pressure, melting the metal containing magnesium and lithium in a silicon carbide / high-purity graphite corrosion-resistant crucible melting furnace, and then delivering the obtained magnesium-lithium binary alloy liquid to a tightly-coupled gas atomization tank for atomization, and obtaining the magnesium-lithium binary alloy fuel powder after screening. The magnesium-lithium binary alloy fuel prepared by the application can not only maintain the low reaction temperature of the fuel, but also improve the oxidation reaction rate of the fuel, greatly improve the combustion rate of the fuel air explosive and magnesium water propellant, and further improve the energy.