290 results about "Si element" patented technology

The invention discloses a preparation method of a heat-resistant aluminum alloy, the heat-resistant aluminum alloy comprises the following materials: 2.5 wt%-4.5 wt% of Cu, 7.5 wt%-9.5 wt% of Si, 0.5 wt%-1.0 wt% of Zn, less than or equal to 0.2 wt% of Mn, 0.3 wt%-0.5 wt% of Mg, less than or equal to 0.25 wt% of Fe, 0.01 wt%-0.045 wt% of Sr, 0.05 wt%-0.25 wt% of Mo, 0.05 wt%-0.25 wt% of W, 0.03 wt%-0.15 wt% of V, and the balance of Al and impurities, and the total content of the impurities is less than or equal to 0.25 wt%. According to the method, the range of 2.0 Zn + 1.5 Cu + 0.5 Mg and the range of 10 (Mo-W) / Si are designed, meanwhile, the design range of FeV and the smelting preparation process are controlled, W and Si elements react and are combined to generate a WXSiy phase, WXSiy has the excellent performance of high melting point (2220 DEG C), high wear resistance, corrosion resistance, oxidation resistance and the like, and after a formed aluminum alloy component is subjected to T6 heat treatment, the tensile strength is larger than or equal to 450 MPa, the yield strength is larger than or equal to 380 MPa, the percentage elongation after fracture is larger than or equal to 2.0%, and the hardness is larger than or equal to 135 HB. According to 250 DEG C high-temperature mechanical property tests, the tensile strength is larger than or equal to 280 MPa, the yield strength is larger than or equal to 220 MPa, the percentage elongation after fracture is larger than or equal to 4.0%, the hardness is larger than or equal to 85 HB, the comprehensive performance is higher than that of a conventional aluminum alloy forming component, and the aluminum alloy can be widely applied to parts such as heavy commercial automobile flywheel shells, gear chambers and cylinder covers working under the high-temperature working condition, replaces cast iron and achieves light weight and weight reduction.

The invention relates to a 5xxx series aluminum alloy additive part and a preparation method thereof, relates to the technical field of additive materials, and aims to solve the problem of urgent development of a process capable of effectively improving the strength of the 5xxx series aluminum alloy additive part without any subsequent treatment. According to the main technical scheme, the preparation method of the 5xxx-series aluminum alloy additive part comprises the following steps that 5xxx-series aluminum-magnesium-based aluminum alloy powder and CNT are subjected to powder mixing treatment, and composite powder is obtained; wherein in the 5xxx series aluminum-magnesium-based aluminum alloy powder, the mass fraction of the Mg element is larger than 4% and not larger than 12%, the mass fraction of the Si element is smaller than 0.4%, and the mass fraction of the Cu element is smaller than 0.2%; in the composite powder, the mass fraction of the CNT is greater than 0.5% and not higher than 5%; the composite powder is formed into a blank, and the blank is made into a bar; and the bar is subjected to friction extrusion deposition treatment, and the 5xxx series aluminum alloy additive part is obtained. The method is used for preparing the 5xxx series aluminum alloy additive part with excellent tensile strength and yield strength, and subsequent heat treatment is avoided.

The invention discloses a welding material, a welding material, application and a preparation method, and the welding material comprises the following raw materials by weight percent: 1%-3% of Si, 1.2%-3.2% of Mg, 1%-3.6% of Zn, 0.6%-1.6% of Cu, 0.5%-0.8% of Mn, 0.2%-0.45% of Cr, 0.1%-0.25% of Ti, 0.05%-0.1% of Zr, 0.05%-0.1% of Sc, and the balance of Fe. 0.2%, and the balance being Al and inevitable impurities. By regulating and controlling the contents of Zn, Cu, Mg and Si elements, the precipitation enthalpy of a nanoscale strengthening phase is reduced, so that the bake hardening effect of a welding seam is improved, and the problem that the welding seam is excessively softened due to melting of the nanoscale precipitation phase is solved. In addition, the Fe-containing brittle phase characteristic in the weld joint is improved by adding Mn and Cr elements, and the hot crack tendency of the weld joint is reduced by combining Zr, Sc, Ti and other grain refinement elements, so that the strength and toughness of the weld joint are further improved.

The invention discloses an ultra-wideband carbon / boron doped high-entropy alloy wave-absorbing material which is prepared by adjusting Fe and Ni elements, adding Si and Al elements and doping a small amount of C or B. The specific component of the wave-absorbing material is (FeaCobSicAldNie) 100-xMx. In addition, the invention also discloses a preparation method of the wave-absorbing material, and the preparation method comprises the following steps: 1, high-entropy alloy smelting; 2, preparing high-entropy alloy spherical powder; 3, carrying out flaky treatment; and 4, stress relief annealing. On the basis of FeCoNi medium-entropy alloy, the content of the Fe element with low cost is increased, the content of the Ni element with high cost is reduced, the Si element and the Al element are added at the same time, then a small amount of non-metal C and B elements are doped to serve as interstitial atoms, lattice distortion is increased, the wave-absorbing performance and corrosion resistance are improved, and the ultra-wideband carbon / boron doped high-entropy alloy wave-absorbing material is obtained.

The invention relates to a preparation method of a seawater wear and corrosion resistant high-entropy alloy coating, and belongs to the technical field of coating preparation and treatment. The preparation method comprises the steps that matching calculation is conducted according to the chemical formula FeCrCoMnSix of the high-entropy alloy, Fe, Cr, Co, Si and Mn-Fe alloy powder are weighed, and x is equal to 0.1-1; the weighed powder is mixed and then subjected to ball milling, and a mixture is obtained; mixing the mixture with an adhesive, coating the mixture on a substrate to form a plurality of prefabricated layers, distributing the prefabricated layers on the substrate in parallel, and then drying the coated substrate; under the protection atmosphere of inert gas, the dried base body coated with the prefabricated layer is subjected to multi-channel laser cladding; and then annealing treatment is conducted, and the high-entropy alloy coating is obtained. According to the method, the seawater corrosion resistance and wear resistance of the high-entropy alloy coating are improved by adjusting the content of the Si element, utilizing the laser cladding technology and further performing annealing treatment.

The invention provides an anodic oxidation die-casting aluminum alloy and a preparation method thereof. The anodic oxidation die-casting aluminum alloy comprises the following elements in percentage by mass: 2-4% of Mg element, 0.2-2% of Si element, 1.6-2.4% of Mn element, 0.2-0.3% of Cu element, less than or equal to 2% of Zn element, less than or equal to 0.2% of Fe element, less than or equal to 0.2% of inevitable impurities and the balance of Al, wherein the sum of the mass content of the Mg element and the mass content of the Zn element is 2-4%; the surface chromatic aberration of the anodic oxidation die-casting aluminum alloy is lt; the white brightness L is larger than or equal to 85, the tensile strength ranges from 180 MPa to 210 MPa, the yield strength ranges from 80 MPa to 120 MPa, and the elongation ranges from 3% to 5%. The anodic oxidation die-casting aluminum alloy has excellent flowability and surface glossiness, and is good in surface quality and high in yield.

The invention relates to the field of additive manufacturing nano precipitated phase reinforced refractory high-entropy alloys, in particular to an additive manufacturing nano precipitated phase reinforced refractory TiNbVAlSix high-entropy alloy. The high-entropy alloy comprises the following chemical components by atomic percent: 45-55% of Ti; 15%-25% of Nb; v, 15%-25%; 8%-15% of Al; and 0-9% of Si. The alloy is prepared through a laser directional energy deposition additive manufacturing method, precipitation of a nano Ti5Si3 phase at the grain boundary and in grains is promoted through addition of the Si element, microstructure characteristics of a disordered BCC phase, an ordered B2 phase and the nano Ti5Si3 phase are formed, and the content of the nano Ti5Si3 phase is in direct proportion to the content of the Si element. The high-entropy alloy has the performance characteristics of light weight and high strength, can meet the requirements of part of aerospace parts, and has important value for development and application of TiNbVAl and related light refractory high-entropy alloy systems.

The invention belongs to the technical field of material corrosion prevention, and particularly relates to a high-Si-content cold spraying Al-Mg-Si composite coating and a preparation method thereof. Spherical Al powder, Mg powder, Si powder and Al2O3 ceramic powder are used as raw materials, and the Al-Mg-Si composite coating is prepared on the pretreated base body through cold spraying. When the coating is prepared, the working temperature is low, the coating has the characteristic of solid deposition at low temperature, the heat influence on a matrix is small, oxidation, grain growth and phase change are avoided in the spraying process, and the residual tensile stress is low. The Al2O3 ceramic powder is added, so that the porosity of the coating can be reduced, and the tissue density is increased. And a proper amount of Si element is added, so that the protection effect of the coating is further enhanced, the corrosion rate inhibition capability of the coating is improved, and the mechanical property of the composite material is improved. And heat treatment is carried out at the selected annealing temperature, so that the performance of the coating can be enhanced, and the performance of the matrix is not influenced.

A phosphor plate includes a plate-like composite including a base material and a phosphor contained in the base material, in which the base material contains spinel, the phosphor includes a phosphor containing a Si element, and in an X-ray diffraction pattern of the phosphor plate using a Cu-Kα ray, in a case in which peak intensity corresponding to the spinel having a diffraction angle 2θ in a range of 36.0° or more and 37.4° or less is set to 1, total intensity of peaks having a diffraction angle 2θ in a range of 32.5° or more and 34.5° or less satisfies 0.5 or less.

An object of the present invention is to provide a novel technology capable of achieving high-quality SiC seed crystal, SiC ingot, SiC wafer and SiC wafer with an epitaxial film. The present invention, which solves the above object, is a method for producing a SiC seed crystal for growth of a SiC ingot, the method including a heat treatment step of heat-treating a SiC single crystal in an atmosphere containing Si element and C element. As described above, by heat-treating the SiC single crystal in an atmosphere containing the Si element and the C element, it is possible to produce a high-quality SiC seed crystal in which strain and crystal defects are suppressed.

The invention provides a bipolar plate composite coating and an electrolytic bath, and relates to the technical field of coating materials, the bipolar plate composite coating provided by the invention comprises Ti element, Ta element and Si element, and the composite coating has better corrosion resistance and smaller interface contact resistance. Moreover, the composite coating provided by the invention does not use noble metal, so that the cost is relatively low. In conclusion, the bipolar plate composite coating provided by the invention has relatively good conductivity, relatively good corrosion resistance and relatively low cost.

The invention provides an aluminum alloy wire and a preparation method thereof. The aluminum alloy wire comprises the following elements in percentage by mass: 0.1 to 7.0 percent of Zn element, 0.2 to 9.6 percent of Mg element, 0.1 to 6.0 percent of Cu element, 0.01 to 1.2 percent of Mn element, 0.1 to 2.0 percent of Fe element, 0.1 to 2.5 percent of Si element, less than or equal to 0.15 percent of inevitable impurities and the balance of Al element, the surface brightness L of the aluminum alloy wire is greater than 60, and the surface brightness color difference E is less than or equal to 0.5; the average roughness Sa is less than or equal to 0.4 mu m, and the maximum peak height Sp is less than or equal to 2.0 mu m; the aluminum alloy wire does not crack after 85% compression deformation; under the test conditions that the temperature is 35 DEG C, and the aluminum alloy wire is placed in a mixed solution of a 57g / L NaCl solution and a 10mL / L H2O2 solution to be soaked for 6 hours, the corrosion depth of the aluminum alloy wire is smaller than or equal to 10 micrometers.

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 provides an anodic oxidation die-casting aluminum alloy and a preparation method thereof. The anodic oxidation die-casting aluminum alloy comprises the following elements of, by mass, 0.01%-1% of Mg element, 0.01%-2% of Zn element, 0.01%-2% of Si element, 0.01%-1% of Ni element, 0.2%-0.5% of Fe element, 1.6%-2.4% of Mn element, 0.1%-0.2% of Cu element, 0.02%-0.2% of Ti element, the total content of inevitable impurities smaller than or equal to 0.2%, and the balance Al element. Wherein the sum of the mass content of the Mg element and the mass content of the Zn element is 1-3%, the sum of the mass content of the Si element and the mass content of the Ni element is 0.1-2.5%, and the sum of the Fe element, the Si element and the Ni element is 0.1-3%. The aluminum alloy can be better used for producing thin-wall piece products with the thickness of 0.8-1.8 mm.

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 provides welding wire steel for welding ultralow-temperature high manganese steel, a welding wire, a preparation method of the welding wire and a welding method. The welding wire steel for welding the ultralow-temperature high manganese steel comprises the following components in percentage by mass: 0.05 to 0.1 percent of C; 0.5 to 0.6 percent of Si; 24% to 25% of Mn; p is less than or equal to 0.01%; s is less than or equal to 0.01%; 0.05% to 0.1% of Al; 0.12 to 0.2 percent of Ni; 0.02% to 0.06% of N; 0.08% to 0.15% of Ti; v, 0.08% to 0.15%; 0.08% to 0.15% of Nb; 0.05% to 0.1% of Mo; and the balance of Fe and inevitable impurities. The welding wire composition design is optimized, only a small amount of Ni element is added, W and other high-melting-point elements are not added, and a small amount of C, N, Ti, V, Nb and other alloy elements are transited to a welding seam through the welding wire, so that nitride, carbide and other pinning grain boundaries are formed in the welding seam at the high temperature, austenite grain growth is effectively prevented, the austenite grain size is reduced, and the low-temperature impact toughness of the welding seam is improved; in addition, a small amount of Si element is transited to the welding seam through the welding wire, molten pool fluidity is improved, slag floating is promoted, and slag inclusion of the welding seam is avoided.

The invention discloses hard alloy welding powder for valve sealing surface surfacing and a preparation method of the hard alloy welding powder. The welding powder comprises 1.20%-1.40% of C element, 2.70%-3.5% of Si element, 3.00%-4.50% of Mn element, 24.00%-26.00% of Cr element, 2.00%-2.20% of Mo element, 3.50%-4.50% of Ni element, smaller than or equal to 0.20% of Co element, smaller than or equal to 0.02% of B element, smaller than or equal to 0.10% of N element and the balance Fe element. The preparation method comprises the following steps: weighing raw materials, mixing and smelting the raw materials to obtain alloy liquid; and the alloy liquid is subjected to gas atomization to prepare powder, and the hard alloy welding powder is obtained after screening. The Co element content is strictly limited, and meanwhile the hardness and other performance can meet the design requirement; the preparation method is simple and reliable in process.

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 invention relates to ferritic stainless steel, in particular to a preparation method of high-toughness, high-corrosion-resistance, high-chromium and high-molybdenum ferritic stainless steel. The invention aims to provide a method for preparing high-chromium and high-molybdenum ferritic stainless steel with high strength and toughness and high corrosion resistance, namely a preparation method of the high-chromium and high-molybdenum ferritic stainless steel with high strength and toughness and high corrosion resistance, which comprises the following steps: adding a proper amount of Cu element into the high-chromium and high-molybdenum ferritic stainless steel, and controlling the content of Si element, thereby obtaining the high-chromium and high-molybdenum ferritic stainless steel with high strength and toughness and high corrosion resistance. Nb element single stabilization is adopted, and a proper production process is selected, so that the yield strength, the tensile strength, the percentage elongation after fracture and the corrosion resistance are remarkably improved.

The invention provides an Er-Zr microalloyed AlSi10Mg alloy powder material, a preparation method of the Er-Zr microalloyed AlSi10Mg alloy powder material, an aluminum alloy workpiece and a preparation method of the aluminum alloy workpiece. The Er-Zr microalloyed AlSi10Mg alloy powder material comprises the following elements in percentage by mass: 9.50 to 10.60 percent of Si element, 0.35 to 0.55 percent of Mg element, 0.70 to 1.30 percent of Er element, 0.70 to 1.30 percent of Zr element, less than or equal to 0.15 percent of total content of inevitable impurities, less than 0.05 percent of single impurity and the balance of Al element. And the Zr element and the Er element can form a dynamically stable L12Al3 (Er, Zr) phase, and the second phase strengthening effect and the recrystallization inhibition effect are achieved, so that the mechanical property of the aluminum alloy workpiece is improved.

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 semiconductor structure forming method comprises the following steps: providing a substrate, and forming a structure to be deposited on the substrate; depositing a target layer on the to-be-deposited structure, wherein the material of the target layer contains an Si element, a C element and an N element; and performing thermal annealing treatment on the target layer, so that the material of the target layer is re-bonded to form a bonded structure, and the bonded structure comprises Si-C and Si-C-N. The thermal annealing treatment is performed on the target layer, so that the material of the target layer is re-bonded to form the bonding structure, the bonding structure comprises Si-C and Si-C-N, and the bonding polarity of the Si-C bonding structure is relatively small, so that the value of the relative dielectric constant of the target layer is reduced, and the parasitic capacitance is correspondingly reduced; and the C element is beneficial to improving the etching resistance of the target layer, and the N element is beneficial to improving the mechanical strength of the target layer, so that the relative dielectric constant of the target layer is reduced, and the etching resistance and the mechanical property of the target layer are improved.

The invention discloses a processing technology of a lightweight high-hardness high-strength aluminum profile, and relates to the technical field of aluminum alloy processing. According to the method, the 7050 aluminum alloy profile is smelted, the extra Si element is added in the smelting process, the content of the Si element in the 7050 aluminum alloy sheet is increased, the metastable Al-Si phase in the alloy is increased, meanwhile, nano TiC is added, the prepared aluminum alloy profile is effectively refined, then multi-stage artificial aging treatment is adopted, more energy is provided for nucleation of a precipitated phase in the aluminum alloy, and the aluminum alloy can be effectively refined. And finally, the recast 7050 aluminum alloy profile is subjected to anodic oxidation surface treatment, a hard compact oxidation film is formed on the surface of the aluminum alloy profile, the porosity of the surface of the aluminum profile is reduced, the hardness of the aluminum profile is enhanced, and the service life of the aluminum profile is prolonged. The aluminum profile prepared through the method is high in strength and hardness, and cracks are effectively reduced in the automobile lightweight application process.

The invention provides a heat treatment-free ZL101A aluminum alloy and a preparation method thereof. The heat-treatment-free ZL101A aluminum alloy is prepared from the following components in percentage by mass: 6.5 to 7.5 percent of Si element, 0.2 to 0.4 percent of Mg element, 0.05 to 0.9 percent of Sc element, 0.05 to 0.9 percent of Er element, 0.1 to 0.2 percent of Ti element, less than or equal to 0.1 percent of Mn element, less than or equal to 0.2 percent of Fe element, less than or equal to 0.2 percent of Cu element and the balance of Al element, wherein reinforcing particles are further added into the heat treatment-free ZL101A aluminum alloy, and the mass ratio of the reinforcing particles in the heat treatment-free ZL101A aluminum alloy is 0.1%-3%. According to the heat-treatment-free ZL101A aluminum alloy, the mechanical property of the heat-treatment-free ZL101A aluminum alloy is improved, and the strength and toughness of the heat-treatment-free ZL101A aluminum alloy in a cast state are improved.

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.