559 results about "Solid solution" patented technology

The invention discloses a method for synchronously reducing hysteresis loss and eddy-current loss of a FeSiAl magnetic powder core, which comprises the following steps: preparing a salt solution of metal M which is low-melting-point metal with atomic radius unequal to that of Al atoms and can form a replacement solid solution with Al; adding the salt solution into the FeSiAl magnetic powder core, drying to obtain an insulated and coated magnetic powder core, and then adding a binder and a lubricant to prepare magnetic powder to be formed; and performing compression molding on the to-be-molded magnetic powder, and performing heat treatment to obtain the magnetic powder core. The low-melting-point M atoms are diffused into the FeSiAl matrix and occupy Al vacancies, lattice distortion can be reduced in the annealing process, and therefore coercive force and magnetic hysteresis loss are reduced; more importantly, after the FeSiAl is doped with the M atoms, the resistivity of the matrix is increased, eddy-current loss in the particles can be effectively inhibited, meanwhile, the Al2O3 coating layer generated through in-situ oxidation can effectively isolate the eddy-current loss among the particles, and therefore the magnetic hysteresis loss and the eddy-current loss are synchronously reduced through the method.

The present invention relates to a steel sheet and a plated steel sheet, each of which has high LME resistance. The steel sheet according to the present invention is characterized in that: the steel sheet has a tensile strength of 780 MPa or more; the steel sheet has a specific chemical component; the depth, at which the C concentration as measured by GDS is 0.05% or less, from the surface of the steel sheet in the thickness direction of the steel sheet is 8 μm or more; the thickness of a layer, in which the area ratio of the ferrite phase is 90% or more, in the thickness direction of the steel sheet from the surface of the steel sheet is 8 μm or more; and the solid solution amount of Si metal and Al metal in the ferrite phase is 0.3% or more in total at the position of 4 μm from the surface of the steel sheet in the thickness direction of the steel sheet.

The invention discloses a high-entropy oxide for synergic nitrogen removal and catalysis as well as a preparation method and application thereof, and belongs to the technical field of material preparation, the high-entropy oxide is a single solid solution phase formed by five or more metal elements of Fe, Co, Ni, Cu, Mn, Ti and Ce and an oxygen element, the configuration entropy of the high-entropy oxide is greater than or equal to 1.5 R, R is a gas constant, and R is an oxygen constant. The mole fraction of each metal element is 0.1-0.3, and the sum of the mole fractions of the metal elements is 1. According to the high-entropy oxide with the synergistic nitrogen removal and catalysis effects and the preparation method and application thereof, a synergistic catalysis system is constructed through the high-entropy oxide and silicon carbide, and the high-entropy oxide has the multiple advantages of being high in nitrogen removal efficiency, high in stability, simple in process, environmentally friendly and wide in application range; the removal rate of total nitrogen and key nitrogen pollutants can reach 90% or above in the seawater high-salt environment, and the environment-friendly emission requirement is met.

The invention discloses a high-oxygen-storage zirconium solid solution material and a preparation method, and belongs to the technical field of rare earth catalytic materials, and the method comprises the following steps: precursor preparation, ultrasonic dispersion, double-gradient precipitation, ultrasonic aging, solid-liquid separation, three-section roasting and furnace cooling. Through the synergistic effect of double-gradient precipitation and ultrasonic aging, coarse grains and non-uniform particle size distribution are avoided, and the material is not prone to abnormal growth of the grains and structural collapse in long-term high-temperature service. Meanwhile, according to the gradient roasting process, through step-by-step regulation and control of crystal densification and crystal lattice reconstruction, separation of a fluorite phase and a pyrochlore phase easily occurring in traditional low-temperature single-section roasting is reduced, a stable crystal phase structure is maintained, it is ensured that the material can still keep sufficient active surface and pore channel structures under the working conditions of high temperature and thermal shock alternation, and the performance of the material is improved. The oxygen storage capacity and the long-term durability of the catalyst carrier are obviously improved.

The invention discloses a titanium alloy based on lamellar alpha phase and nanophase precipitation and a preparation method of the titanium alloy, belongs to the field of titanium alloy materials, and aims to solve the bottleneck that strength and work hardening of a high-strength titanium alloy are difficult to cooperate. The titanium alloy comprises, by weight, 2.0%-7.5% of Al, 1.0%-6.0% of V, 1%-8% of x (x is at least one eutectoid beta stable element of Fe, Mn, Cr, Ni and Cu) and the balance Ti and impurities. And the beta-phase molybdenum equivalent [Mo] eq is controlled to be 5.0-10.0. The preparation method comprises the following steps: 1) smelting an ingot for three times in a vacuum consumable electric arc furnace, and cutting a dead head after scaling and flaw detection; (2) carrying out hot rolling at 810-950 DEG C in an alpha + beta two-phase region with the accumulative deformation amount of 75-95%, and constructing a multi-scale lamellar alpha phase, and (3) carrying out solid solution for 30-120 minutes at 700-850 DEG C, rapidly cooling at 50-250 DEG C / s, and inducing the precipitation of a nano eutectoid compound. Aging treatment is not needed, the yield strength is greater than 900 MPa, the work hardening amount is greater than 150 MPa, the elongation is greater than or equal to 15%, the process is simple and easy to industrialize, and the method can be applied to the fields of aerospace, ocean engineering and the like.

The invention discloses a heat treatment method of an iron-nickel-based high-temperature alloy, which solves the contradiction between stress relief annealing and performance maintenance through four-step temperature coordinated regulation and control: in the first step, MC type carbide is dissolved through solid solution, segregation is eliminated, and excessive growth of crystal grains is avoided; in the second step, roughening of M23C6 type carbides is inhibited through solid solution, and formation of fine and uniform carbides on grain boundaries is promoted so as to strengthen the grain boundaries; in the third step, the residual stress is reduced through stress relief annealing, and meanwhile grain boundary carbide growth and abnormal grain growth are avoided; and in the fourth step, uniform and stable precipitation of a gamma'phase is promoted through aging, the nanometer size and the high volume fraction are maintained, and coarsening is avoided. Through precise temperature connection, the residual stress is effectively reduced, grain growth, structure nonuniformity or performance degradation caused by traditional annealing are avoided, and finally the application requirement of the superhigh-temperature steam environment at the temperature of 650 DEG C or above is met on the premise that the mechanical property and the corrosion resistance are guaranteed.

The invention belongs to the field of synthesis of inorganic non-metallic materials, and particularly relates to an equimolar-ratio seven-element high-entropy oxide and a preparation process thereof. The preparation process comprises the following steps: putting seven oxide powder Al2O3, Y2O3, TiO2, ZrO2, NiO, CuO and CeO2 into a ball milling tank according to a molar ratio of 1: 1: 2: 2: 2: 2: 2: 2, adding absolute ethyl alcohol and zirconium oxide grinding balls, performing ball milling in a ball mill, and fully drying and sieving after ball milling to obtain mixed powder; carrying out tabletting treatment on the mixed powder to obtain a to-be-sintered green body; and putting the to-be-sintered green body into an alumina crucible, and putting the alumina crucible into a microwave oven for microwave sintering. According to the method, the equimolar-ratio seven-element high-entropy oxide (AlYTiZrNiCuCe) Ox with good solid solution is obtained, the crystallinity and element uniformity of the seven-element high-entropy oxide are improved, all the raw materials react completely, meanwhile, the process efficiency is high, and energy consumption is low.

The invention discloses a vanadium-based neutron transparent alloy material and a preparation method thereof, the alloy is a disordered solid solution of a body-centered cubic structure formed by a single crystal phase, the chemical composition is V < 1-x > Mx, x is less than 0.1, V is a metal element vanadium, and M is selected from one or more of Al, Nb, Ta, Fe, Sn or Mo. According to the alloy, neutron diffraction peaks generated by metal vanadium can be effectively eliminated while a metal vanadium body-centered cubic crystal structure is not damaged, the neutron transparent alloy material is successfully prepared, the process is simple and feasible, the formula has diversified choices, multiple novel double-element vanadium-based neutron transparent alloys are prepared, and the neutron transparent alloy material has good application prospects. In addition, the multi-element vanadium-based transparent neutron alloy is prepared for the first time, all the materials have excellent chemical and mechanical properties, and compared with an existing Ti2.08Zr alloy, the multi-element vanadium-based transparent neutron alloy has better high-temperature chemical stability.

The invention provides a method for deeply extracting vanadium from vanadium-containing steel slag, which comprises the following steps: mixing the vanadium-containing steel slag and an oxygen-containing microbubble ammonium bicarbonate solution, and carrying out mechanochemical ball milling activation to carry out leaching reaction to obtain a vanadium extracting solution. According to the method, advanced oxidation is cooperated with mechanochemical ball milling to activate and strengthen deep extraction of vanadium in the vanadium-containing steel slag, wrapping of substances such as calcium silicate and calcium titanium oxide on a vanadium-containing solid solution phase is destroyed through mechanical activation, and O2 microbubbles in an ammonium bicarbonate medium are promoted to generate active oxygen under excitation of mechanical activation energy; exposure reaction and deep oxidation extraction of a vanadium-containing phase under mild conditions are achieved, the content of V2O5 in tailings after vanadium extraction is smaller than or equal to 0.5%, and the vanadium extraction rate is 83% or above.

The invention relates to the technical field of chemical catalysts, in particular to a cerium-based solid solution loaded iron-based oxygen vacancy enhanced low-temperature ammonia synthesis catalyst. The heterovalent ions are doped in CeO2 crystal lattices to introduce strain and defects, so that the oxygen vacancy formation energy and concentration are greatly improved. Experiments show that the oxygen vacancy concentration (delta) of the Ce0. 8Zr0. 2O2-delta carrier disclosed by the invention can reach 0.12, which is 3-5 times that of pure CeO2. Under the conditions of 250 DEG C and 5 MPa, the ammonia synthesis rate reaches 120 [mu] mol / g / h, which is more than 20 times that of a traditional molten iron catalyst; under the conditions of 350 DEG C and 10 MPa, the ammonia synthesis rate exceeds 1000 [mu] mol / g / h and is close to the level of a noble metal ruthenium-based catalyst. As the working temperature is reduced by 100-150 DEG C, the reaction heat consumption is reduced by more than 30%, and the overall energy consumption is reduced by 25-40%.

In one aspect, evaporator boats are provided which, in some embodiments, exhibit resistance to corrosion and associated performance degradation imparted by exposure to molten metals, including aluminum. An evaporator boat described herein comprises a body and an evaporator surface, the body comprising a boron nitride (BN) component and a TiB2 component including a solid solution of TiB2 and one or more elements selected from the group consisting of silicon and metallic elements of Groups IVB-VIIIB of the Periodic Table.

The invention relates to a component-adjustable (Hfx, Zry) C nanowire and a preparation method thereof.The preparation method comprises the steps that ZrCl4 powder and HfCl4 powder are mixed according to a set proportion to obtain mixed powder, then the mixed powder is placed in a powder sublimation area of a chemical vapor deposition furnace, and a SiC nanowire template is placed in a reaction constant-temperature area of the chemical vapor deposition furnace; the preparation method comprises the following steps: reacting a nanowire in a negative pressure environment by taking H2 as a reaction gas, Ar as a diluent gas and ZrCl4 and HfCl4 as a Zr source and an Hf source, and cooling to room temperature after the reaction is finished to obtain the (Hfx, Zry) C nanowire, the components of the obtained (Hfx, Zry) C nanowire are adjustable and controllable, and compared with a SiC nanowire, the obtained (Hfx, Zry) C nanowire is high in high-temperature stability, can still keep a three-dimensional network structure in an oxidizing atmosphere at 1700 DEG C, and is converted into the (Hfx, Zry) O2 nanowire in situ. The (Hfx, Zry) C nanowire prepared by the method is low in synthesis temperature, free of catalyst, stable in preparation process and high in repeatability. The method is wide in application range and can be popularized to preparation of refractory metal carbide single-component and multi-component solid solution nanowires.

A sintered cemented carbide includes a high-entropy carbide or a rotary knot decomposition product thereof; and a metal binder comprising at least one of Co, Co-Ru, Ni, Co-Ni, Co-Cr, Co-Ni-Cr, Co-Re, Co-Ni-Re, Co-Ni-Ru, or a high-entropy alloy wherein the high-entropy carbide is a single-phase solid solution carbide comprising four to ten metal elements, and the spin decomposition product thereof comprises two chemically different phases having the same crystal structure. The sintered cemented carbide further includes a carbide including at least one of WC, TiC, ZrC, HfC, NbC, TaC, or Cr3C2, and a metal binder; the metal binder comprises a high-entropy alloy. The high-entropy alloy is an alloy of four to ten alloy elements selected from Al, Be, Fe, Co, Cr, Ni, Cu, W, V, Zr, Ti, Mn, Hf, Nb, Mo, Ru, Re, Ge, Sn, C, B or Si.

The invention discloses a multi-component atomic level oxide solid solution integrated electrode for electrolyzed water and a preparation method thereof, and belongs to the field of metal material surface plating. The electrode is composed of a gas diffusion layer, a nano array substrate and an atomic level oxide solid solution catalyst layer. The preparation method comprises the following steps: constructing a nano array microreactor on the surface of the gas diffusion layer; the method comprises the following steps: driving an atomic hierarchy solid solution to reconstruct by utilizing an array confinement effect through combination of precursor directional spraying and a heat treatment-rapid quenching process, and constructing a three-dimensional conformal ionomer network on the surface of the atomic hierarchy solid solution; and performing gold plating treatment on the back side of the electrode. Through the synergistic effect of spatial constraint and thermodynamic regulation of the nano microreactor, the traditional electrode interface mismatch bottleneck is broken through, and while precise construction of atomic-scale active sites is realized, the mechanical stability and oxygen evolution reaction kinetics of the electrode are improved. The preparation process has the advantages of controllable flow, strong large-scale expansibility and good industrial preparation prospect.

The invention relates to 780 MPa grade wheel steel and a manufacturing method thereof. The technological process comprises the steps of KR molten iron desulphurization, converter smelting, argon blowing, LF refining, RH vacuum treatment, continuous casting blank forming, plate blank heating, rolling, cooling and coiling. According to the method, the economical titanium alloy is adopted, precipitation strengthening of Ti is not used for improving the strength of base metal, and solution strengthening and structure strengthening are used for enabling the strength performance of the material to meet the requirement; meanwhile, the process that the front section is rapidly cooled to the medium-low temperature to be coiled is adopted, precipitation of Ti is inhibited, precipitation of TiC is inhibited, growth of columnar crystals is inhibited, the Ti element in the steel in a solid solution mode can be reserved, most of Ti in the material is inhibited by the high cooling speed and the low cooling stopping temperature, and the Ti is still in a solid solution mode and not precipitated in base metal; the Ti element is re-precipitated in the welding stage to the user side, and the strength and hardness of the welding heat affected zone and the welding seam are improved by re-precipitation strengthening of the Ti element in the process, so that the softening phenomenon of the welding heat affected zone and the welding seam can be avoided.

The invention belongs to the technical field of photocatalytic materials, and discloses a preparation method of a BiOCl / BiOI composite photocatalyst for visible light degradation of rhodamine B. The energy band structure of BiOCl is regulated and controlled in cooperation with BiOI, and efficient photocatalytic decoloration of rhodamine B with wide spectral response is achieved through S-type interface charge transfer. A petal-shaped BiOCl / BiOI heterojunction with R = 8: 1, a BiOCl0. 88I0. 12 solid solution and a BiOCl0. 8I0. 2 solid solution show excellent visible light catalytic activity, and about 92.52% of rhodamine B molecules, 99.7% of rhodamine B molecules and 99.7% of rhodamine B molecules are respectively degraded by the BiOCl / BiOI heterojunction and the BiOCl0. 88I0. 12 solid solution after being irradiated by visible light for 10 minutes. The catalytic reaction accords with the two-stage one-stage kinetic law, and high photocatalytic efficiency can still be maintained after five times of circulation. The single BiOCl and BiOI respectively degrade about 64.3% and 10.02% of rhodamine B molecules under the same light reaction condition, and the catalytic reaction follows a first-level kinetic model. The preparation method has the advantages of being low in preparation temperature, simple in technological process, stable in chemical property and the like, the large-scale two-dimensional micron / nanosheet and the three-dimensional self-assembly structure of the large-scale two-dimensional micron / nanosheet can be obtained only through a hydrothermal and water bath synthesis technology, and the preparation method has great application value in the field of visible light degradation of organic pollutants.

The invention provides a positive electrode material and a preparation method and application thereof.The positive electrode material comprises an inner core and a coating layer on the surface of the inner core, the inner core comprises a lithium-rich manganese-based material, and the coating layer comprises a solid solution dielectric compound and phosphate; the chemical general formula of the solid solution dielectric compound is Ba [alpha] M [beta] TiO3, alpha + beta = 1.0, beta is greater than 0 and less than or equal to 0.3, and M comprises a metal element. According to the positive electrode material disclosed by the invention, physical contact and electrochemical side reaction between a positive electrode interface and an electrolyte are inhibited through interface coating, so that the battery has excellent high-temperature stability, and the problem that a lithium-rich manganese-based material is relatively low in interface stability under a high-temperature condition is effectively solved.

The invention discloses a method for recovering platinum and palladium from high-cobalt nickel-containing carbonylation slag, and relates to the technical field of non-ferrous metal carbonylation metallurgy, the method comprises the following steps: S1, hydrogen reduction and activation; s2, feeding into a high-pressure carbonylation reactor; and S3, efficient carbonylation. According to the method, the carbonylation slag is subjected to hydrogen reduction activation treatment, nickel protoxide and cobalt oxide are changed into simple substance nickel, the simple substance nickel is fed into a carbonylation reactor for carbonylation under the protection of reducing gas or inert gas after activation treatment, 95% of Ni, 85% of Fe and 80% of Co are carbonylated to enter a gas phase after carbonylation, bonding of cobalt and a platinum solid solution is broken through carbonylation, and the nickel-cobalt-cobalt-cobalt-cobalt alloy is obtained. Nickel protoxide is difficult to dissolve in various strong acids and oxidizing acids, and a foundation is laid for further separation of base metals and non-metallic element sulfur from precious metals to produce high-grade platinum concentrate.

The invention discloses a lattice distortion and entropy value-based high-entropy alloy screening method, which comprises the following steps of: firstly, simultaneously calculating the lattice distortion degree and entropy value of a high-entropy alloy, and then determining the components of the high-entropy alloy meeting the requirements according to the screening requirements; according to the Hume-Rother alloy solid solution theory, the lattice distortion degree is calculated; the lattice distortion degree must be greater than or equal to 8.7%, and the upper and lower limit difference must be greater than or equal to 2.0%; entropy calculation is carried out based on the statistical definition of the concept of mixed entropy in statistical mechanics; the entropy value must be greater than or equal to 1.5 R. The obtained TiFeMnCoVZr high-entropy alloy only contains a Laves phase, and when the TiFeMnCoVZr high-entropy alloy is used as a magnesium hydride hydrogen storage material, the maximum hydrogen absorption amount can reach 4.7 wt.%, the maximum hydrogen desorption amount is 4.6 wt.%, and the hydrogen desorption activation energy is 68.9 kJ / mol.

The invention discloses a volute solid-liquid separation clarification device which comprises a bottom shell and a volute plate, the bottom end of the volute plate is fixedly connected with the bottom shell, the bottom shell is conical, the bottom end of the volute plate is attached to the inner wall of the bottom shell, and the outer end of the volute plate and the bottom shell are jointly connected with a baffle. A spiral / volute-line-shaped / vortex-line-shaped flow channel is formed in the vortex-shaped plate, a water outlet of the spiral flow channel is formed above the baffle, mixed liquid needing solid-liquid separation flows from the inner ring end of the vortex-shaped plate to the water outlet along the spiral flow channel, and a plurality of discharging openings are formed in the bottom of the bottom shell in a penetrating mode. A plurality of discharge pipes communicated with the discharge ports are fixedly mounted at the bottom of the bottom shell; by arranging the bottom shell, the vortex-shaped plate, the baffle, the multiple discharging openings and the like, the advantages of three solid-liquid separation modes of horizontal flow precipitation, vertical flow precipitation and centrifugal separation are integrated, the sizes of D1 and D2 can be designed in a targeted mode according to the characteristics of materials needing to be separated, the precipitation position is controlled, and small occupied space and classified separation of the materials are achieved.

The invention provides a method for extracting lithium and beryllium from lepidolite concentrate, and relates to the technical field of lithium extraction from concentrate. The method comprises the following steps: mixing and grinding lepidolite concentrate and auxiliary materials, roasting at high temperature, leaching the roasted clinker with water, carrying out solid-liquid separation to obtain a leaching solution and leaching residues, adding a neutralizer into the leaching solution, adjusting the pH value of the leaching solution to 8, precipitating impurities such as iron, aluminum, beryllium and manganese in the leaching solution, and carrying out solid-liquid separation to obtain an impurity-removed solution and neutralized residues. By adding the auxiliary materials, the lithium and beryllium elements in the lepidolite can be selectively replaced, and the content of other impurity metal elements in the leachate is low, so that the subsequent impurity removal process is facilitated. And after neutralization and impurity removal, most beryllium in the mineral can be effectively enriched in a small amount of neutralization slag and can be used for subsequent beryllium extraction.

The invention relates to a Ti element doped high-performance high-temperature samarium cobalt permanent magnet material and a preparation method thereof, and belongs to the field of rare earth permanent magnet materials. Elements of Sm, Co, Fe, Cu, Zr and Ti with the purity higher than 99.9% are uniformly mixed and smelted into an original cast ingot, a powder metallurgy preparation technology is adopted, the cast ingot is ground into alloy powder, and the samarium-cobalt permanent magnet material is prepared through orientation compression, isostatic pressing, high-temperature sintering, solid solution and isothermal aging heat treatment processes. According to the invention, by doping the Ti element, the grain size is increased, the grain boundary impurity phase precipitation is inhibited, and the thickness and the content of the flaky phase are properly reduced, so that the number of reverse magnetization nucleation sites is reduced, and the magnetic properties such as the coercive force and the maximum magnetic energy product of the magnet are effectively improved.

The invention discloses in-situ synthesized functional titanium fine stemming for a blast furnace, and belongs to the field of metallurgy. The high-strength and high-toughness refractory material is prepared from the following components in parts by weight: 8-15 parts of first alumina, 8-15 parts of second alumina, 8-15 parts of first silicon carbide, 7-15 parts of kyanite with the particle size of 1-0 mm, 8-15 parts of ferro-silicon nitride, 10-20 parts of second silicon carbide, 3-8 parts of Guangxi mud, 5-15 parts of a titanium-containing raw material, 1-3 parts of a carbon source, 1-3 parts of a catalyst, 1-3 parts of metal silicon powder, 1-7 parts of a nitrogen source and 10 parts of a binding agent. The stemming has the characteristics of simple and convenient process, low production cost, environmental protection and no pollution, the performance of the stemming is stable due to the self-generated TiC, TiN and Ti (C, N) solid solutions, and the stemming shows excellent low-temperature and medium-temperature strength, high volume density, low sintering shrinkage rate and good slag iron corrosion resistance.

The invention relates to preparation and application of a metal oxide-molecular sieve composite catalyst, and belongs to the technical field of industrial catalysis. The catalytic reaction takes carbon dioxide and hydrogen as reaction raw materials, and the catalyst is formed by compounding a metal oxide and a molecular sieve. Wherein the metal oxide is a solid solution metal oxide or a spinel metal oxide composed of three or two metal elements of M1, M2 and M3, M1 is one of Zn, Ga and In, M2 is one of Ce, Sm, La and Fe, and M3 is one of Zr, Ga, Cr, Al and Ti; the framework of the molecular sieve is a silicon-aluminum-oxygen or silicon-phosphorus-aluminum-oxygen tetrahedron; the metal oxide is prepared by adopting a gas diffusion method. The metal oxide disclosed by the invention is prepared by adopting a gas diffusion method, and has a very high specific surface area (80-300 m < 2 > g <-1 >). The composite catalyst shows excellent performance in a reaction for preparing low-carbon olefins (ethylene, propylene and butylene) through carbon dioxide hydrogenation, the carbon dioxide conversion rate can reach 35% or above, the carbon monoxide selectivity is smaller than 40%, the selectivity of the low-carbon olefins in hydrocarbons can reach 82.1%, the yield of the low-carbon olefins reaches 20.3%, and the composite catalyst has high catalytic stability. Compared with a traditional catalyst, carbon dioxide and hydrogen can be efficiently adsorbed and activated, so that the conversion rate of carbon dioxide is increased, the preparation method is simple, the catalytic performance is excellent, and the catalyst has good industrial application prospects.

The invention belongs to the technical field of nickel-based superalloy heat treatment, and particularly relates to a nickel-based superalloy rapid aging heat treatment method. The method comprises the following steps: firstly, carrying out solution treatment on the nickel-based superalloy, and cooling an alloy sample subjected to the solution treatment in water to obtain a solution sample; and then the solid solution sample is subjected to electric pulse N-stage aging treatment. The Joule heating effect and the electromigration effect generated by the pulse current in the nickel-based superalloy are utilized to promote the transfer of solute atoms and the precipitation of gamma'phase, so that the aging time of the SLM-GH4099 nickel-based superalloy is greatly shortened, and the aging energy consumption is reduced.

A transparent, chemically prestressable or chemically prestressed glass ceramic has a high transmittance, a low haze and a high crystal phase content of keatite solid solution. A method of making such a glass ceramic includes producing a silicate green glass with a melting process and subsequent hot shaping, temperature treating the silicate green glass with at least one nucleation step carried out in the temperature range of 690° C. to 850° C. for a period of 5 min to 72 h and at least one ceramization step carried out in the temperature range of 780° C. to 1100° C. for a period of 3 min to 150 h, and performing at least one ion exchange in an exchange bath at a temperature of the exchange bath between 370° C. and 500° C. for a period of between 2 hours and 50 hours.

According to the anti-oxidation UN-based composite fuel pellet and the preparation method thereof, silicon carbide (SiC) serves as an anti-oxidation performance reinforcing phase of the UN fuel pellet, SiC is distributed in a dispersed mode or continuously distributed in a UN fuel matrix in a three-dimensional mode, and by means of the intragranular-grain boundary synergistic reinforcing effect of SiC, the anti-oxidation UN-based composite fuel pellet can be used for preparing the anti-oxidation UN-based composite fuel pellet, and the anti-oxidation UN-based composite fuel pellet can be used for improving the anti-oxidation performance of the UN fuel pellet. And the oxidation resistance of the UN fuel pellet is remarkably improved. Intragranular modification generated by solid solution reaction of trace SiC and UN can effectively enhance intrinsic oxidation resistance of a UN matrix, and meanwhile, excellent chemical inertness of a second phase of SiC can effectively inhibit grain boundary oxidation. By optimizing the morphology and distribution mode of the SiC second phase in the composite fuel pellet, the oxidation resistance of the composite fuel pellet can be further improved.

The invention discloses a preparation method and application of a lattice-gap mixed RuO2 solid solution acidic oxygen evolution electrocatalyst. According to the RuO2 electrocatalyst and the preparation method thereof, high-valence metal is introduced into RuO2 unit cells at the same time to serve as a lattice substitution doping component, nonmetal serves as an interstitial doping component, and a lattice-interstitial mixed RuO2 solid solution structure is constructed, so that the activity and stability of the RuO2 electrocatalyst are remarkably improved. The preparation method comprises the following steps: dissolving soluble ruthenium salt, high-valence metal salt, non-metal salt and a molten salt medium in deionized water, and stirring to form a solution; the solution is freeze-dried to prepare a precursor, and then the precursor is subjected to heat treatment to obtain the lattice-gap mixed RuO2 solid solution acidic oxygen evolution electrocatalyst. According to the lattice-gap mixed RuO2 solid solution acidic oxygen evolution electrocatalyst prepared by the invention, the overpotential required by a catalytic oxygen evolution reaction under the current density of 10mA cm <-2 > can be as low as 168mV, and the electrocatalyst can continuously and stably work for more than 500h in an acidic environment, so that the application requirements of the acidic oxygen evolution electrocatalyst can be greatly met.

The present invention relates to the field of magnetic material preparation and heat treatment technology, specifically a method for widening the heat treatment process window of a high magnetic permeability nanocrystalline strip. By gradient composition design and pulsed magnetic field coupling heat treatment, the initial magnetic permeability of the strip exceeds 220,000 and the heat treatment temperature range is widened to 400°C-600°C; the alloy composition is Fe73.5%, Cu1%, Nb3%, Si13.5%, B8.5%, Co0.5%, and during heat treatment, the temperature is first raised to 450°C at 15°C / min and a 0.8T pulsed magnetic field is applied to keep the temperature, and then the temperature is raised to 550°C for keeping the temperature, crystallizing to generate α-Fe(Si) nanocrystals and Co-B amorphous interface phase, with Co distributed in the form of solid solution. This method widens the heat treatment temperature range, improves the initial magnetic permeability of the strip, improves toughness to meet automated production, and reduces costs using existing equipment; the prepared strip has high magnetic permeability and good stability, is suitable for a variety of scenarios, and has good economic and social benefits.

The invention provides a metal material surface treatment method based on the synergistic effect of solid solution-aging heat treatment and laser shock. The metal material surface treatment method is used for remarkably improving the mechanical property of a metal material and the uniformity and stability of a microstructure. Different from a traditional single laser shock peening process, the heat treatment method is combined with laser shock, and the double effects of structure optimization and mechanical property enhancement are achieved. Specifically, firstly, alloy elements are subjected to sufficient solid solution in a matrix through solid solution-aging heat treatment, heat preservation is conducted at the low temperature so that a strengthening phase can be promoted to be separated out again, and the strengthening phase which is evenly and stably distributed is obtained; and then laser shock is applied to the surface of the material, deep residual compressive stress is introduced into the surface layer through high-energy pulse laser, and a nanocrystalline layer structure is formed. According to the synergistic process, the microstructure stability and uniformity of the material are effectively improved, and the mechanical property of the material is remarkably improved. The technology is suitable for the fields of aerospace, automobile lightweight structures, rail transit and the like, and has wide industrial application prospects.