180 results about "Si element" patented technology

The invention discloses a high-entropy alloy wear-resistant coating with a silicon-containing transition layer for improving the wettability of a copper surface and a laser cladding method, and relates to the technical field of alloy coatings. The method comprises the following steps: providing silicon-containing transition layer alloy powder and CoCrFeNiTi series high-entropy alloy powder; providing a copper base material, and cleaning the surface to be cladded of the copper base material; cladding silicon-containing transition layer alloy powder on the surface of the copper base material by adopting a laser cladding process under a protective atmosphere to form a silicon-containing transition layer; and under the protective atmosphere, CoCrFeNiTi series high-entropy alloy powder is cladded on the surface of the silicon-containing transition layer through a laser cladding process, and the high-entropy alloy wear-resistant coating is formed. According to the high-entropy alloy coating disclosed by the invention, the Si element in the transition layer can be subjected to interface reaction with a copper substrate to form a Cu-Si solid solution phase with low interface energy, so that the interface tension between copper and a subsequent cladding coating is remarkably reduced, and the wettability between the copper substrate and a coating material is fundamentally improved; the high-entropy alloy coating is successfully cladded on the copper surface with poor wettability.

The invention provides an aluminum alloy and a preparation method thereof, and the aluminum alloy comprises the following elements in percentage by mass: 0.30-0.50 wt.% of Si, 0.30-0.50 wt.% of Fe, 0.30-0.50 wt.% of Cu, 0.30-0.50 wt.% of Mn, 0.30-0.50 wt.% of Mg, 0.30-0.50 wt.% of Zn, 0.30 0.45 wt.% to 0.65 wt.% of Fe; 0.40 wt.% to 0.80 wt.% of Cu; mn: 1.25 wt.% to 1.35 wt.%; less than or equal to 0.05 wt% of Mg and less than or equal to 0.10 wt% of %, 0.02 wt.% to 0.05 wt.% of Ti; other single impurities: less than or equal to 0.05 wt.%; the total of other impurities is less than or equal to 0.15 wt.%; and Al: the balance. According to the aluminum alloy and the preparation method thereof, the content of high-strength elements in the aluminum alloy is increased, the content of Mn elements and the content of Fe elements are increased, meanwhile, the Si element is added and matched with the Fe element, the strength and hardness of the aluminum alloy can be effectively improved, and especially the remarkable effect is achieved after cold machining such as rolling; and meanwhile, it is guaranteed that the aluminum alloy has good ductility, the tensile strength of the aluminum alloy is larger than 150 MPa, the ductility of the aluminum alloy is lower than 17%, and the aluminum alloy has good mechanical performance.

This invention provides a copper alloy and its preparation method. The copper alloy has the following mass percentage composition: Ni: 0.5–2.0 wt%, S: 0.3–0.8 wt%, P: 0.1–0.3 wt%, Sn: 0.1–0.2 wt%, Si: 0.05–0.2 wt%, with the balance being Cu and unavoidable impurities. The microstructure of the copper alloy contains Cu₂S particles. This invention designs the composition and microstructure of the copper alloy, particularly controlling the content range of Ni, P, and Si elements to give the material high strength and high conductivity. Furthermore, the addition of S element forms Cu₂S particles, thereby improving the material's machinability and facilitating its fabrication into connector components.

The invention provides a 5G50 aluminum alloy plate strip for anodic oxidation and a preparation method of the 5G50 aluminum alloy plate strip. The 5G50 aluminum alloy plate strip for anodic oxidation comprises the following elements in percentage by mass: 0.01%-0.10% of Si element, 0.04%-0.15% of Fe element, 3.0%-4.0% of Mg element, 0.2%-1.2% of Mn element, less than or equal to 0.02% of inevitable impurity element in total content, less than 0.05 wt% of single impurity element and the balance of Al. Wherein after the aluminum alloy plate strip is subjected to anodic oxidation treatment, the surface of the aluminum material has no heterochromatic stripe defect, and the chromatic aberration E is less than 0.15. The 5G50 aluminum alloy plate strip for anodic oxidation can give consideration to both high surface quality and excellent mechanical performance, is widely applied to 3C consumer electronics, and can achieve the practical effects of falling resistance, light weight and attractive appearance of the product.

The invention discloses a preparation method of a high-strength and high-conductivity aluminum alloy profile, which comprises the following steps: 1) carrying out solution treatment on an aluminum alloy raw material to obtain a supersaturated solid solution; (2) the supersaturated solid solution is subjected to low-temperature extrusion treatment, and the aluminum alloy profile is obtained; and thirdly, the aluminum alloy profile is heated, and the high-strength and high-conductivity aluminum alloy profile is obtained. According to the method, hot extrusion is replaced by low-temperature extrusion, so that the aluminum alloy profile generates a remarkable cold hardening effect, the strength of the alloy is greatly improved, meanwhile, severe plastic deformation at the extrusion temperature generates a large number of intragranular dislocations, Mg and Si elements are promoted to be quickly and fully dispersed and separated out, the alloy generates a precipitation strengthening effect, and the conductivity is improved.

The invention relates to a TiC-SiC reinforced 304 stainless steel composite coating based on high-speed laser cladding and a preparation method of the TiC-SiC reinforced 304 stainless steel composite coating. The composite coating with 304 stainless steel as a metal matrix phase and TiC and SiC as ceramic reinforced phases is prepared on the surface of a steel matrix by adopting a high-speed laser cladding technology. In the cladding process, the TiC ceramic particles keep stable in structure, the SiC ceramic particles are subjected to controllable partial decomposition, the Si element released through decomposition forms a Si enrichment area on the interface of the ceramic particles and the metal matrix, and the C element released through decomposition reacts with the metal matrix to generate a carbide phase. Therefore, the composite coating which is compact in structure and good in interface bonding is obtained and is suitable for surface protection of steel components serving under the working condition of coupling abrasion and corrosion.

The invention relates to the technical field of alloys, and discloses a high-strength and high-toughness die-cast Al-Mg-Si alloy and a preparation method thereof, and the Al-Mg-Si alloy comprises the following components by weight percent: 5.5-8.5% of Mg, 0.5-1.5% of Mg, 0.5-1.5% of Si, 0.5-1.5% of Al, 0.5-1.5% 2.8 to 4.0% of Si; 0.5 to 0.8 percent of Mn; be: 0.004% to 0.006%; 0.001 to 0.01 percent of Na (sodium); 0.01%-0.2% of a rare earth metal element; the rare earth metal element is at least one of La single rare earth or Ce single rare earth; 0.02 to 0.1 percent of V; the Mg element and the Si element also need to meet the following requirements in percentage by mass: Mg / Si is more than 1.73 and less than 2.5; the total amount of the other impurities is less than or equal to 0.2%; and the balance of Al. The alloy has the characteristics of high strength and high toughness under the condition of a die-casting state, and has important application value.

The application relates to the technical field of zinc-aluminum coating detection, in particular to a method for rapidly detecting the contents of Zn, Al and Si elements in a zinc-aluminum coating; the method comprises the following steps: ultrasonic cleaning of the zinc-aluminum coating to be detected to obtain a pretreated sample; glow surface analysis of the pretreated sample by using a glow spectrum method, drawing of a horizontal and vertical coordinate graph, and obtaining of an Fe-h curve graph, a Zn-h curve graph, an Al-h curve graph and a Si-h curve graph; according to the curve graphs, the total mass of Zn, Al and Si is respectively calculated; the thickness of the zinc-aluminum coating to be detected is calculated by taking the Fe-h curve graph as a standard curve; according to the curve graphs and the thickness of the zinc-aluminum coating to be detected, the average mass of Zn, Al and Si is respectively obtained; and according to the average mass and the total mass, the average mass fraction of Zn, Al and Si is obtained. The method can avoid the substrate effect of the zinc-aluminum coating in the detection process, so that the accuracy of the zinc-aluminum coating detection is improved.

A method for modifying a high-strength titanium-based amorphous composite material with Si element comprises the following steps: 1. selecting raw materials; 2. surface treating the raw materials; 3. batching the raw materials; placing the treated bulk raw materials together in a vacuum arc melting furnace; 4. melting the initial alloy ingot; 5. melting the target alloy ingot; 6. spray casting; cutting, polishing, and cleaning the alloy ingot obtained in step 5 to obtain an alloy material to be placed in a quartz glass tube with a small hole at the bottom; evacuating the spray casting furnace chamber and then filling it with high-purity argon gas; and heating the alloy material in the quartz glass tube by energizing the induction coil of the spray casting furnace to obtain (Ti 48 Zr 20 Nb 12 Cu5Be 15 ) 99.9～99.7 Si 0.1～0.3 The amorphous composite material is in a rod shape. The present invention obtains uniform structure, high strength and good plasticity by introducing an appropriate amount of silicon element and controlling its process parameters, thereby solving the problem of unsatisfactory plasticity of amorphous composite materials at room temperature in the prior art.

A main object of the present disclosure is to provide an electrode layer of which volume change amount is suppressed. The present disclosure achieves the object by providing an electrode layer including a composite particle, wherein the composite particle includes: a plurality of active material containing a Si element or a Sn element; and a binder; and when R designates an average particle size of the composite particle in a thickness direction of the electrode layer, and d designates a thickness of the electrode layer, a rate of the R with respect to the d, which is R / d, is 0.20 or less.

The composite active material includes an electrode active material including an Si element and having a void therein, and a coating layer covering the surface of the electrode active material and including a solid electrolyte. A composite active material is provided in which BET specific surface area of the composite active material is less than or equal to 40 m2 / g, and the coverage by the coating layers is 20% or more.

The application relates to a feed for metal injection molding, a preparation method of the feed and a metal product, wherein the preparation method of the feed comprises the following steps: S1, obtaining the following components according to weight parts: 40-50 parts of Fe elements, 2-8 parts of Ni elements, 20-25 parts of Cr elements, 20-25 parts of Co elements, 2-8 parts of Mo elements, 2-8 parts of Cu elements, 0.1-3 parts of Si elements, 1-3 parts of Mn elements, mixing and then heating to melt the material, and then adopting a high-pressure water-gas combined atomization method to obtain mixed powder; S2, obtaining a forming agent; S3, preheating the mixed powder obtained in S1 under vacuum conditions, then adding the forming agent into the mixed powder for mixing, and then performing plasticizing extrusion granulation to prepare the feed. The feed can meet the size precision requirements of MIM injection, green compact degreasing sintering and related post-process machining, the existing MIM materials on the market cannot simultaneously meet the problem of high polishable hardness, and the obtained metal product has the comprehensive advantages of appearance and hardness.

Provided is a method for manufacturing a powder magnetic core capable of improving insulating properties. This method for manufacturing a powder magnetic core comprises: a first step (step S10) in which a metal magnetic material powder comprising a plurality of metal magnetic material particles, a resin, and a metal soap are mixed to obtain a granulated powder; a second step (step S20) in which the obtained granulated powder is press-molded to obtain a molded body; and a third step (step S40) in which the obtained molded body is annealed. In the first step, the mixed metal soap is in a liquid state at 25 DEG C and contains Si element.

The invention belongs to the technical field of composite aluminum alloy, and discloses an aluminum alloy composite board and a corrosion-resistant aluminum alloy composite board. The aluminum alloy composite board is of a double-layer structure which comprises a core layer and a corrosion-resistant layer; the core layer comprises a Si element, a Fe element, a Cu element, a Mn element and a Mg element, and the anti-corrosion layer comprises a Zn element, the Si element and the Fe element; the corrosion-resistant aluminum alloy composite board is obtained by carrying out zinc impregnation treatment on the aluminum alloy composite board. And after zinc impregnation treatment, the difference value between the potential of a Zn-element-free diffusion area of the anti-corrosion layer and the potential of the innermost layer of the core layer is smaller than or equal to 150 mV. The corrosion-resistant aluminum alloy composite board shows excellent layered corrosion in a corrosion environment.

A composite active material has an electrode active material and a coating layer. The electrode active material includes an Si element. The coating layer coats a surface of the electrode active material. The coating layer contains a hydride solid electrolyte.

The invention provides a 7xxx series aluminum alloy plate strip for anodic oxidation with a high recovery ratio and a preparation method of the 7xxx series aluminum alloy plate strip. The 7xxx series aluminum alloy plate strip comprises the following elements of 0.06%-0.12% of Si element, 0.10%-0.25% of Fe element, 4.5%-5.5% of Zn element, 2.0%-3.0% of Mg element, 1.2%-2.0% of Cu element, 0.05%-0.15% of Mn element, 0.10%-0.15% of Er element, 0.10%-0.12% of Zr element, 0%-0.03% of Ti element and the balance aluminum element. The aluminum alloy plate strip is prepared through the steps of reclaimed material grading pretreatment, low-liquid-level semi-continuous casting, multi-stage homogenizing heat treatment, hot rolling, cold rolling, solid solution, pre-stretching, two-stage aging and the like. Through joint optimization of material components and the process, the finished plate strip has excellent mechanical performance, an oxidation film is uniform in color and luster, and salt mist resistance, friction resistance and the like are achieved.

The invention discloses an additive manufacturing method of a high-temperature-resistant titanium-based composite material with good room-temperature strong plasticity matching, relates to the field of metal-based composite materials, and aims to solve the problem that the high temperature resistance and near-net forming cannot be considered at the same time when an existing titanium-based composite material, especially titanium alloy TA15, TiB2 and Si powder is used as a reinforced phase additive for manufacturing the titanium-based composite material. The method comprises the steps that TA15 titanium alloy powder serves as a base body, TiB2 and Si powder serves as a reinforcing phase, a titanium-based composite material is prepared through the selective laser melting technology, then annealing heat treatment is conducted, and the additive manufacturing method is completed. According to the method, the problems that the titanium-based composite material prepared through selective laser melting is poor in room-temperature plasticity and insufficient in heat resistance are remarkably improved, the microstructure of the material is improved through annealing heat treatment, residual stress is released, silicide is separated out through introduction of the Si element, the high-temperature strength of the material is improved, the room-temperature plasticity of the material is remarkably improved, and the heat-resistant temperature of the material is remarkably improved.

The application relates to an agate color coated workpiece and a preparation method thereof. The preparation method comprises the following steps: S1, depositing a transition layer on a base material by adopting a magnetron sputtering mode; S2, depositing a TiAlN intermediate layer on the transition layer in S1 by adopting the magnetron sputtering mode; and S3, depositing a TiAlSiN agate color coating layer on the TiAlN intermediate layer in S2 by adopting the magnetron sputtering mode. In step S3, the sputtering power of the Si target is controlled, so that the percentage of Si elements in the deposited TiAlSiN layer is 7%-8%. The application obtains a special agate color coated workpiece, and the workpiece has high hardness and wear resistance, and has a wider application prospect.

The invention relates to the technical field of inorganic material preparation, in particular to a ZIFs material for long-acting capture of CO2, a preparation method and application of the ZIFs material in carbon neutralization. The ZIFs material is obtained by carrying out surface coating on ZIFs-8 particles, the ZIFs material contains an Si element; the D90 particle size value is selected from 350-800nm, and the specific surface area is selected from 300-600m < 2 > / g. According to the invention, self-assembly coating is carried out on the surface of the ZIF-8 material, so that the ZIFs-based material which has good adsorption performance on CO2 and has good hydrophobicity and weather resistance is prepared.

The application discloses a TiZrHfSi high-temperature brazing filler metal and a preparation method thereof. The TiZrHfSi high-temperature brazing filler metal is prepared by mixing Ti, Zr, Hf and Si element powders, ball-milling, and then uniformly mixing with a binder to form a paste-like brazing filler metal. The high-temperature brazing filler metal aims at connecting C / C composite materials, and the connected part after brazing can be used under high-temperature harsh conditions, thereby prolonging the service life of the material.

The invention relates to a low-carbon equivalent extra-thick wind power steel plate with yield strength of 420 MPa and a manufacturing method thereof, and belongs to the field of metallurgy. According to the product, low-C economical hardenability elements added with Mn-Cr serve as an alloy system, V-Ti-Al fine grain strengthening is combined, addition of precious metal such as Ni / Cu / Mo / Nb is omitted, the carbon equivalent is controlled, and it is guaranteed that the steel plate is easy to weld. And the addition of the Si element is canceled, so that the surface quality is improved, and the fatigue aging of the wind power tower drum in the use process caused by low surface quality is avoided. And the microstructure is ferrite and pearlite. ReH is larger than or equal to 420 MPa, Rm is larger than or equal to 500 MPa, the ductility is larger than or equal to 19%,-50 DEG C Charpy V-type impact energy is larger than or equal to 31 J,-50 DEG C core Charpy V-type impact energy is larger than or equal to 31 J, and-10 DEG C CTOD value is larger than or equal to 0.27 mm.

The present disclosure solves the above problem by providing an electrode active material that contains an Si element and that includes a void in the interior of a primary particle, in which: a first void having a pore diameter of 30 nm or more and 100 nm or less and a second void having a pore diameter of 1 nm or more and 5 nm or less are included as the void; and when the amount of the first void is A and the amount of the second void is B, the ratio (A / B) of the A to the B is more than 0.10 and less than 17.00.

The application discloses a TiAl alloy, a deformation heat treatment method and application, and the alloy is as follows: Ti-(43-48)Al-(0-8)X-(0-0.5)Z, wherein X is one or two or more of Nb, Mo, Cr, Ta, V and Mn elements; Z is one or two or more of Fe, C, N, O, B and Si elements; the alloy is a fine-grain duplex structure, the fine-grain duplex structure is composed of fine-size sheet group and equiaxial gamma grains; the size of the sheet group is 20-40 mu m, the size of the gamma grain is 10-20 mu m, and the volume fraction of the gamma grain is 30-60%; firstly, high-density crystal defects are generated in the original structure by controlling the deformation temperature, the deformation rate and the deformation amount of the pre-deformation treatment; and then, the fine-grain near-sheet structure or the duplex structure is obtained by controlling the holding temperature and the holding time in the isothermal heat treatment process.

The present disclosure relates to an electrode active material and a battery. An electrode active material using a granulated body. The granulated body is a secondary particle provided by primary particles containing a Si element with use of a binder. In the electrode active material, a content of an organic solvent is 950 ppm or less.

The invention relates to a coating for a high-hardness die steel washing and milling cutter and preparation of the coating, and belongs to the technical field of milling cutter coatings. The invention provides a preparation method of a coating for a high-hardness die steel washing and milling cutter, which comprises the following steps of: ultrasonically cleaning a milling cutter, rinsing with deionized water, drying and preheating to obtain a treated base material, then carrying out bottom layer deposition on the treated base material by adopting multi-arc ion plating to obtain an intermediate base material, and carrying out heat treatment on the intermediate base material to obtain the coating for the high-hardness die steel washing and milling cutter. And finally, carrying out surface layer deposition on the intermediate base material by adopting multi-arc ion plating. According to the method, an AlTi target material is used, ion plating deposition is carried out under the nitrogen atmosphere, a tough and antioxidant AlTiN-based coating can be formed, and the hardness of the surface of the tool is enhanced; and on the AlTiN-based coating, the TiAlSi target material is adopted, solid solution strengthening of the Si element is combined, the hardness of the coating is remarkably improved, and the method is suitable for machining of high-hardness die steel.

The present invention relates to the technical field of ferritic stainless steel, specifically an annealing method for improving the intergranular corrosion resistance of super ferritic stainless steel. To address the problem of how to improve the recrystallization annealing process to enhance the intergranular corrosion resistance of stainless steel plates while maintaining fine grains, a novel annealing method for improving the intergranular corrosion resistance of super ferritic stainless steel is provided. The method comprises three continuous annealing stages: a pre-precipitation annealing to pre-precipitate a nanoscale Laves phase; a recrystallization annealing to pin grain boundaries and refine grains; and finally, a resolubility annealing to dissolve the Laves phase at high temperature, dissolving Nb, Mo, and Si elements near the grain boundaries and precipitating Nb (C, N) particles. The drag effect of the solute Nb, Mo, and Si suppresses grain coarsening, thereby enhancing the intergranular corrosion resistance of the super ferritic stainless steel while maintaining fine grains and ensuring its mechanical properties.

The invention discloses an aluminum alloy, an aluminum alloy foil, a heat exchanger fin and refrigeration equipment, and relates to the technical field of alloy materials. The aluminum alloy provided by the invention comprises 0.05 wt%-0.8 wt% of cerium rare earth elements in percentage by weight; the cerium rare earth element comprises Ce. The rare earth element Ce is added into the alloy raw materials, meanwhile, the content of Fe and Si elements in the aluminum alloy is reduced, the grain size in the metal structure can be effectively refined, and the as-cast structure can be improved; the invention further develops a rolling process matched with the aluminum alloy material, so that a coarse intermetallic compound in an as-cast structure of an aluminum alloy ingot obtained by pouring is fully crushed in the rolling process, and the prepared aluminum alloy foil has relatively high yield strength, tensile strength and ductility.

Provided is a novel method for processing a SiC substrate. Provided is a method for processing a SiC substrate, the method comprising: an annealing step (S2) for heating a SiC substrate (1) in an inert gas atmosphere; and an etching step (S3) in which the SiC substrate (1) that has been subjected to the annealing step (S2) is etched in an atmosphere containing a gas comprising either or both of Si element and C element.

The application discloses a low-cost rare earth high-strength dual-phase steel and a preparation method and application thereof, and belongs to the technical field of rare earth dual-phase steel. The low-cost rare earth high-strength dual-phase steel has the following chemical component compositions and mass percentages: C: 0.05-0.09%; Si: 0.3-0.5%; Mn: 1.0-1.5%; Als: 0.020-0.055%; Cr: 0.25-0.55%; Ti: 0.05-0.09%; Ce: 0.0030-0.0070%; P: <=0.010%; S: <=0.004%; N: <=0.004%, and the rest is Fe and inevitable impurity elements. The application does not add molybdenum and niobium, and through the addition of Mn and Si elements in a specific proportion, Cr and Ti in a specific proportion and rare earth Ce, and in combination with a multi-stage homogenization treatment process, a high-elongation, high-hardness, low-cost rare earth high-strength dual-phase steel is obtained.

The present invention discloses a lateral merging epitaxial growth method and application of a GaN thin film with a low dislocation density. The lateral merging epitaxial growth method includes: providing a growth substrate with a surface material being a doped GaN material, and the doping element including Si; performing a nitridation treatment to self-assemble a plurality of SiN x mask structures at dislocation sites; and continuing with epitaxial growth to form a GaN thin film with a low dislocation density. In the present invention, an enrichment of Si elements is formed at the dislocation sites of the GaN material, and through the nitridation treatment, the SiN x mask structures are specifically covered on the surfaces of the dislocations during growth, forming a shielding and covering of the dislocations, so as to avoid the extension of dislocations into the GaN epitaxial layer during the subsequent GaN vertical epitaxial growth and lateral merging epitaxial growth processes. Thereby, the dislocation density in the GaN epitaxial layer is greatly reduced. At the same time, there is no need for a patterned mask and the corresponding patterned etching process, and the complexity and cost are both relatively low, which is suitable for large-scale production applications.