131 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.

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 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 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.

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.

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 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 application discloses a diffusion source, a rare earth permanent magnet and a preparation method and application. The diffusion source comprises a heavy rare earth layer and a nickel alloy transition layer; one surface of the nickel alloy transition layer is attached to the heavy rare earth layer, and the other surface is used for being attached to an initial magnet to be diffused; the nickel alloy transition layer is formed by raw materials comprising a nickel-containing alloy powder and an X metal powder; wherein the nickel-containing alloy powder is an aNi·bSi·cB alloy powder; wherein a is a value of weight percentage of Ni element, b is a value of weight percentage of Si element, and c is a value of weight percentage of B element, and the ratio of a, b and c is 84-98.3:1.2-8.5:0.5-7.5; the X metal is selected from at least one of sub-group elements; and the weight ratio of the nickel-containing alloy powder to the X metal powder is 85-95:5-15. The diffusion source is beneficial to improving the coercive force of the magnet.

A main object of the present disclosure is to provide an electrode active material having a small volume change due to charge and discharge.SOLUTION: In the present disclosure, the problem is solved by providing an electrode active material that contains a Si element and has voids inside primary particles, wherein the voids include first voids having a pore diameter of 30 nm or more and 100 nm or less and second voids having a pore diameter of 1 nm or more and 5 nm or less, and a ratio (A / B) of the amount of the first voids to the amount of the second voids is larger than 0.10 and smaller than 17.00, where A represents the amount of the first voids and B represents the amount of the second voids.SELECTED DRAWING: Figure 1

The invention relates to an electrode active material and a battery. In the present disclosure, the problem is solved by providing an electrode active material obtained by aggregating a plurality of primary particles using a binder, in which: the primary particles are an Si-based active material containing an Si element; the binder is an organic polymer having a tensile modulus of from 0.10 MPa to 1100 MPa (inclusive); the ratio of the binder to the sum of the primary particles and the binder is 1% by weight or more and 20% by weight or less; and the electrode active material has a particle size D50 of 2.5 [mu] m or more and 20 [mu] m or less.

The application discloses a high-strength and high-plasticity Mg-Y-Zn-Si-Li-Al alloy and a preparation method thereof, and relates to the technical field of light alloy processing. 97.5 Y1Zn 0.5 In the Mg 97.5 Y1Zn 0.5 Si1base alloy, the Si element is combined with the Y element to form a YSi hard and brittle phase, which is easy to hinder the elongation of the alloy; the addition of the Li element plays a grain refining role on the one hand, effectively improves the strength of the alloy, and optimizes the second phase form on the other hand, promotes the transformation of the second phase to the nanometer level, provides more slip paths for dislocation movement, and avoids plasticity deterioration; the Al element is further combined with the Y element to form a high-strength Al2Y strengthening phase, which not only reduces the precipitation of the hard and brittle phase, but also stabilizes the organizational structure through the pinning effect at the grain boundary.

The steel sheet according to an aspect of the present invention has a GDS profile of an Mn element and a GDS profile of an Si element, which are observed from the surface to the depth, sequentially including a maximum point and a minimum point, wherein a difference of converted concentration of Mn is 80% or more, and a difference of converted concentration of Si is 50% or more.

The invention relates to the technical field of battery materials, in particular to a bipolar plate composite coating structure, a preparation method thereof and an electrolytic bath, and the bipolar plate composite coating structure comprises the following elements: Ti element, Si element, Zr element, W element and C element. In terms of the total atomic number being 100%, the percentage of the atomic number of the Ti element is 15%-25%, the percentage of the atomic number of the Zr element is 25%-35%, the percentage of the atomic number of the Si element is 10%-20%, the percentage of the atomic number of the W element is 10%-20%, and the percentage of the atomic number of the C element is 5%-10%. The invention aims to provide the bipolar plate which is low in cost and excellent in conductivity and corrosion resistance.

The invention provides a copper alloy pipe and a preparation method thereof. The copper alloy pipe is prepared from the following elements in percentage by mass: 0.5 to 2.1 percent of Al element, 0.5 to 2.0 percent of Si element, 0.5 to 2.0 percent of Ni element, 0.05 to 0.08 percent of Ce element, 0.05 to 0.1 percent of Cr element, 0.05 to 0.08 percent of V element, less than or equal to 0.02 percent of inevitable impurities and the balance of Cu element, an alpha phase and a beta phase exist in the copper alloy pipe, and the mass ratio of the alpha phase to the beta phase is (40-80): (20-60). The copper alloy pipe can give consideration to high strength, high conductivity and corrosion resistance, directional regulation and control of the double-phase proportion can be achieved by controlling the mass ratio of the alpha phase to the beta phase, optimization and adjustment are conducted according to the strength and conductivity requirements, and then the copper alloy pipe can be better applied to sea optical cable connecting pieces, underwater equipment connectors and other use scenes.

The present application relates to the field of aerospace structure new material, and particularly relates to a carbon-based composite material surface HfB2-MoSi2-HfSi2 high oxygen barrier coating and a preparation method thereof.The present application utilizes the common element B-Hf-Si-Mo bridging in HfB2-MoSi2-HfSi2 powder, realizes the high oxygen barrier strengthening of the carbon-based composite material surface HfB2-MoSi2-HfSi2 coating, overcomes the problem that the Si element has a long repair path and poor aging for the loose holes of Hf oxide in the prior art, ensures the stability of the coating at high temperature, and has the advantages of promoting in-situ sealing and oxygen barrier strengthening.The preparation method of the present application comprises the following steps: briquetting, self-propagating combustion, and densification sintering of the coating on the carbon-based material surface by using low-temperature hot pressing technology, and has the characteristics of simple preparation process and short preparation period.

This invention belongs to the field of friction stir welding technology, and relates to a high-temperature, high-strength steel for friction stir welding heads and its preparation method. The steel's mass percentage composition is as follows: C: 0.25%–0.40%, Mn: 0.15%–0.8%, Si: 0.05%–0.3%, Cr: 0.2%–1.0%, Mo: 1.0%–1.5%, V: 0.05%–0.2%, Nb: 0.005%–0.015%, S: ≤0.03%, P: ≤0.03%, with the balance being Fe and unavoidable impurity elements. Compared to traditional high-temperature steels, this invention reduces the content of V and Nb elements and adds Si element, reducing the impact of large-size primary carbides on the material's strength and toughness. While maintaining the high comprehensive mechanical properties of high-temperature steel, it also reduces the temperature requirements for high-temperature diffusion annealing and hot working, saving material and energy costs.

The invention discloses a Mg-Y-Zn-Si-Li-Al alloy with a high product of strength and elongation and a preparation method of the Mg-Y-Zn-Si-Li-Al alloy, and relates to the technical field of light alloy processing. According to the Mg-Y-Zn-Si-Li-Al alloy with the high product of strength and elongation and the preparation method of the Mg-Y-Zn-Si-Li-Al alloy, in the Mg97.5 Y1Zn0. 5Si1 basic alloy, the Si element and the Y element are combined to form a YSi hard and brittle phase, and the phase serves as a stress concentration point and is prone to hindering improvement of the elongation of the alloy; the Li element is added, on one hand, the grain refinement effect is achieved, the alloy strength is effectively improved, on the other hand, the form of a second phase is optimized, the second phase is promoted to be converted to the nanoscale, more slippage paths are provided for dislocation motion, and plasticity deterioration is avoided; the Al element is further combined with the Y element to form a high-strength Al2Y strengthening phase, precipitation of hard and brittle phases is reduced, and the structure is stabilized through the pinning effect at the grain boundary.