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199 results about "High fracture" patented technology

High-strength and high-toughness aluminum nitride ceramic and preparation method thereof

The invention discloses a high-strength and high-toughness aluminum nitride ceramic and a preparation method thereof, and relates to the technical field of ceramics, a sol-gel method is adopted to coat the surface of aluminum nitride with a stable shell layer to form a core-shell structure, meanwhile, the low lattice mismatch rate of a core-shell interface is utilized to reduce thermal resistance, and toughness and thermal conductivity are both considered; according to the external magnetic field tape casting method, the magnetic dipole moment orientation principle is utilized, an external magnetic field is applied in the tape casting stage, the in-plane mechanical property is improved, and the fracture toughness is improved through the magnetism of aluminum nitride whiskers; a reinforcement is introduced to improve the mechanical property and corrosion resistance of the aluminum nitride ceramic material, multi-granularity powder is compounded, large-particle aluminum nitride powder is used as a sintering and heat-conducting framework material, and high activity provided by submicron particles is utilized to promote sintering, so that the sintering temperature of aluminum nitride can be remarkably reduced, and the performance is greatly improved; and the aluminum nitride substrate expands more application fields on a future packaging circuit.
Owner:四川富乐华半导体科技有限公司 +1

Gradient gradient powder material as well as preparation method and application thereof

The invention discloses a gradient gradual change type powder material as well as a preparation method and application thereof. The gradient gradual change type powder material comprises a non-metal core, a transition layer, a gradual change layer and a modification layer. The gradient powder material provided by the invention shows excellent strength-ductility synergistic effect, high fracture toughness and enhanced fatigue, wear and corrosion resistance, is good in metal wettability, can effectively reinforce a metal matrix and improve the performance of the metal matrix, can also be well dispersed in resin, and can be applied to the field of metal materials. The gradient powder material disclosed by the invention has a wide application prospect, and can be applied to the fields of heat dissipation of electronic devices, high-speed cutting tools, grinding material and grinding tool materials, high-temperature protection materials and the like.
Owner:HUNAN XINJUNENG TECHNOLOGY CO LTD

High-toughness ultrathin flexible glass and preparation method thereof

The invention discloses high-toughness ultrathin flexible glass and a preparation method thereof, and relates to the technical field of glass manufacturing. The ultrathin flexible glass is prepared from the following raw materials: silicon dioxide, aluminum oxide, lithium oxide, sodium oxide, magnesium oxide, a modified nano reinforced phase, a high-temperature melting regulator and cerium dioxide. The modified nano reinforced phase is prepared by the following steps: pre-treating silicon carbide and silicon nitride with hydrochloric acid, and mixing with nano zirconium oxide to obtain a mixture; and modifying the mixture with a silane coupling agent to obtain the modified nano reinforced phase. The high-temperature melting regulator is a mixture of lithium borate, sodium sulfate and lithium fluoride. The preparation method of the ultra-thin flexible glass comprises the following steps: preparing the modified nano reinforced phase, melting and homogenizing the glass, forming the glass substrate, and preparing the ultra-thin flexible glass. The ultra-thin flexible glass prepared by the invention has relatively high fracture toughness and structural rigidity, excellent flexibility and bending fatigue durability, and excellent thermal shock resistance.
Owner:LONGGUANGTIANXU SOLAR ENERGY ZHUCHENG

Alumina-based gradient ceramic as well as preparation method and application thereof

The invention provides alumina-based gradient ceramic as well as a preparation method and application thereof, and belongs to the technical field of ceramic materials. A gradient structure design is adopted, based on a non-linear component distribution mode, the ratio of aluminum oxide to zirconium oxide is optimized, a sintering aid is added, aluminum oxide-based composite powder is synthesized through high-energy ball milling, a mold is filled with the aluminum oxide-based composite powder in a layered mode according to the gradient design after the aluminum oxide-based composite powder is dried, and the compact aluminum oxide-based gradient ceramic is obtained through a hot pressing sintering process. The alumina-based gradient ceramic prepared by the invention has high Vickers hardness (greater than or equal to 21 GPa), high strength (greater than 850 MPa) and high fracture toughness (greater than 7 MPa.m < 1 / 2 >), and has excellent mechanical properties, and the fracture toughness and the strength are greatly improved on the premise of ensuring that the Vickers hardness is not reduced.
Owner:INNER MONGOLIA UNIV OF SCI & TECH

High-toughness Ti (C, N)-based metal ceramic as well as preparation method and application thereof

The invention belongs to the technical field of advanced metal ceramic composite materials, and particularly relates to high-toughness Ti (C, N)-based metal ceramic and a preparation method and application thereof. The high-toughness Ti (C, N)-based metal ceramic comprises the following components in percentage by weight: 50 to 70 percent of solid solution, 15 to 25 percent of metal binding phase, 0.1 to 0.5 percent of rare earth oxide or rare earth salt and 15 to 25 percent of carbide phase, the solid solution contains an amplitude-modulated decomposition structure. The solid solution hard phase with an amplitude modulation decomposition structure is reserved in the alloy containing a certain amount of metal binder, so that the metal ceramic material has higher fracture toughness, bending strength and high-temperature toughness compared with traditional Ti (C, N)-based metal ceramic under the condition that the hardness is kept unchanged.
Owner:JIANGXI UNIV OF SCI & TECH

High-toughness metal ceramic particle and preparation method thereof

The invention belongs to the technical field of metal ceramic, and particularly relates to a high-toughness metal ceramic particle and a preparation method thereof.The particle is characterized in that ceramic micro powder, surface modified ceramic powder and rare earth element carbonitride form a composite hard phase, and the composite hard phase is dispersed in a metal matrix composed of multiple metal elements; and synergistic regulation and control components are introduced to optimize interface bonding and tissue uniformity. Particles are subjected to a step-by-step heat treatment and isostatic pressing forming process, and a stable structure is formed by controlling the oxygen content and the sintering atmosphere. The obtained material has high bending strength, high fracture toughness and good thermal shock resistance, is suitable for the application field of wear resistance and crack resistance under extreme working conditions, and has tissue compactness and mechanical stability.
Owner:YIYANG JINNENG NEW MATERIAL

Low alloy steel with high fracture toughness and strength and elongation product higher than 50 GPa%, manufacturing method and application of low alloy steel

The invention provides low-cost low-alloy steel with the fracture toughness higher than 140 MPa.m < 1 / 2 > and the product of strength and elongation higher than 50 GPa% and a manufacturing method. The microstructure of the steel is as follows: 78-88% of martensite matrix, 10-20% of retained austenite, 1-3% of transition carbide and less than 1% of stable nano precipitated carbide. The steel comprises the following element components in percentage by mass: 0.60 to 0.70 percent of C, 1.25 to 1.75 percent of Mn, 1.25 to 1.75 percent of Si, 0.02 to 0.05 percent of Nb + V and the balance of iron. According to the manufacturing process, at least one time of normalizing treatment is carried out, and then a quenching-distribution-tempering (Q-P-T) heat treatment process is carried out. The mechanical property of the low-alloy steel is improved by designing a proper microstructure fraction, optimizing steel components and adjusting a heat treatment process, so that the fracture toughness of the low-alloy steel is higher than 140 MPa.m < 1 / 2 >, and the product of strength and elongation is higher than 50 GPa%.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI

Sulfide solid electrolyte and preparation method thereof, battery and application

The application relates to the field of electrochemistry, and provides a sulfide solid electrolyte, a preparation method thereof, a battery and an application. 7‑ A PS 6‑A X A The application also provides a sulfide solid electrolyte selected from any one of compounds of a chemical formula Li 7‑ A PS 6‑A X A X is halogen, and 1<=A<=2; wherein the sulfide solid electrolyte has a fracture toughness of 0.5-2 MPa m 1 / 2 The sulfide solid electrolyte has high fracture toughness and ionic conductivity. Further, the preparation method controls the particle size of a substrate, reduces the solvent consumption and optimizes the sintering step, thereby improving the fracture toughness, high purity and high ionic conductivity of the product, and significantly reducing environmental pollution, energy consumption and production cost.
Owner:GUANGZHOU TINCI MATERIALS TECH

Fracture activation early warning method and system based on fracturing pump stopping data

The invention provides a fracture activation early warning method and system based on fracturing pump stop data, and the method comprises the steps: firstly determining first pressure drop curve data based on obtained pressure monitoring data after fracturing pump stop of a target oil and gas well; then, filtering the first pressure drop curve data to obtain second pressure drop curve data; second, based on the second pressure drop curve data, a pressure drop derivative and a target double logarithmic curve are determined. Next, according to the target double logarithmic curve, extracting monitoring characteristic parameters; and finally, based on the monitoring characteristic parameters and an early warning threshold, determining fracture activation early warning information. The method focuses on analysis of pressure data after pump stop in fracturing operation by utilizing different seepage capacities of fluid in a rock matrix and fracture. And in combination with double logarithmic curve characteristic analysis, monitoring characteristic parameters representing fracture activation are extracted so as to effectively identify activation characteristics of fracturing fracture. Therefore, the accuracy of fracture activation early warning can be effectively improved.
Owner:CHINA NAT PETROLEUM CORP +1

High-strength and high-toughness Al-Zn-Mg-Cu aluminum alloy profile for ultra-large aircraft wing rib and preparation method thereof

The invention discloses a high-strength and high-toughness Al-Zn-Mg-Cu aluminum alloy profile for an ultra-large aircraft wing rib and a preparation method of the high-strength and high-toughness Al-Zn-Mg-Cu aluminum alloy profile, the Al-Zn-Mg-Cu aluminum alloy profile comprises the following alloy components in percentage by mass: 5.5-5.8% of Zn, 1.6-1.9% of Mg, 1.9-2.5% of Cu, 0.2-0.3% of Mn, 0.1-0.2% of Zr, 0.1-0.2% of Cr, 0.1-0.2% of Ti, less than or equal to 0.12% of Fe, less than or equal to 0.1% of Si and the balance of Al and inevitable impurities, and the content of a single impurity is not more than 0.05%. The total content of impurities does not exceed 0.15%; the preparation process comprises the steps of smelting casting, two-stage homogenizing annealing, extrusion, solution treatment, stretch straightening and two-stage artificial aging, a mold adopted during extrusion is a double-mold-hole mold, and mold holes of the mold are distributed left and right and are in central symmetry. According to the Al-Zn-Mg-Cu aluminum alloy and the preparation method thereof, by optimizing the alloy components, adjusting the layout of the die holes of the die and the solid solution and aging process, the grain structure of the profile is fine and uniform in distribution, and the Al-Zn-Mg-Cu aluminum alloy guarantees excellent strength while the fracture toughness is improved.
Owner:SHANDONG NANSHAN ALUMINUM +2

A solder, high strength steel workpiece, laser welded joint and method of making the same

The present application relates to the manufacture of high-strength steel coated plate welded parts, in particular to a welding material, a high-strength steel workpiece, a laser welded joint and a manufacturing method thereof. The composition of the welding material satisfies the following conditions in terms of percentage by weight: C is greater than or equal to 0.5%, trace alloying elements are 0-0.36%, the content of Mn and Si is less than or equal to 2%, 6% is greater than or equal to 5C+Mn and is greater than or equal to 2.5%, and the rest is Fe and inevitable other elements; the trace alloying elements are at least one of Nb, V and Ti elements, and the content of Nb, V and Ti elements is less than or equal to 0.12%. The method does not need to remove the aluminum coating, utilizes the solid solution strengthening effect of C, and makes the volume fraction of lath martensite in the final weld after quenching greater than or equal to 90%. This scheme reduces the addition of alloying elements, reduces the cost and process control difficulty, avoids the formation of coarse carbides, improves the mechanical properties and stability of the joint, has high fracture strength and elongation, and realizes the double improvement of the strength and toughness and economy of the joint.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI

Thermal barrier coating (TBC) material with high fracture toughness, calcia-magnesia-alumino silicate (CMAS) corrosion resistance, and ultra-high-temperature sintering resistance, and preparation and use thereof, and tbc

A thermal barrier coating (TBC) material with high fracture toughness, calcia-magnesia-alumino silicate (CMAS) corrosion resistance, and ultra-high-temperature sintering resistance, and a preparation and use thereof are provided, belonging to the technical field of high-temperature / ultra-high-temperature TBCs. In the TBC material, ZrO2 is co-doped with different rare earth oxides and a crystal defect concentration and a lattice distortion degree are controlled by a doping amount of the rare earth oxides, resulting in a fully-stabilized cubic fluorite crystal structure showing no phase change at a room temperature to 1,600° C. Moreover, the material exhibits high toughness, CMAS corrosion resistance, ultra-high-temperature sintering resistance, and long service life.
Owner:EAST CHINA UNIV OF SCI & TECH +2

High-strength and high-transparency nano microcrystalline glass as well as preparation method and application thereof

PendingCN120957954AHigh fractureCordierite
The invention relates to high-strength and high-transparency nano glass ceramic and a preparation method and application thereof, and the high-strength and high-transparency nano glass ceramic is prepared from a synthetic aluminum-rich feldspar ceramic glass material, a beta-spodumene material, a cordierite material, a synthetic beta-dicalcium silicate material and a magnesium aluminate spinel material. According to the present invention, a stable-structure feldspar matrix glass is adopted as a main body precursor mineral material, zirconia micro-powder with a particle size of less than 10 nm is adopted as a nucleation agent and a micro-crack damping pinning agent, nanometer microcrystals with a particle size of less than 100 nm are controlled to be generated in a glass body formed after melting, and the nanometer microcrystals account for 50-95% by volume; the high-strength and high-transparency nanocrystalline glass with a uniform microstructure is formed and woven with matrix glass in a symbiotic manner. The prepared nano microcrystalline glass has the advantages of high hardness, high fracture toughness resistance and high light transmittance, and is suitable for manufacturing various optical glass.
Owner:HUNAN JINGCI NEW MATERIALS CO LTD

Solder, high-strength steel workpiece, laser welding joint and manufacturing method of laser welding joint

The invention relates to manufacturing of high-strength steel coated and plated plate welding parts, in particular to a welding flux, a high-strength steel workpiece, a laser welding joint and a manufacturing method of the laser welding joint. The solder comprises the following components in percentage by weight: more than or equal to 0.5% of C, 0-0.36% of trace alloy elements, less than or equal to 2% of Mn, less than or equal to 2% of Si, more than or equal to 6% of 5C + Mn and more than or equal to 2.5% of Fe and other inevitable elements, the trace alloy element is at least one of Nb, V and Ti elements, and the content of the Nb, V and Ti elements is not more than 0.12%. According to the method, an aluminum coating does not need to be removed, and the volume fraction of lath martensite in the quenched final weld joint is larger than or equal to 90% by means of the solid solution strengthening effect of C. According to the scheme, alloy element addition is reduced, cost and process control difficulty are lowered, thick carbide is prevented from being formed, the mechanical property and stability of a joint are improved, and the high breaking strength and ductility are achieved; the obdurability and the economical efficiency of the joint are improved.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI

Alumina-zirconia eutectic sintering material and preparation method thereof

The invention relates to an alumina-zirconia eutectic sintering material and a preparation method thereof, and relates to the technical field of high-temperature structural ceramic materials. The preparation method comprises the following steps: dispersing 80-95 parts of aluminum oxide powder, 1-10 parts of zirconium oxide powder and 0.1-1 part of yttrium oxide powder in a solvent, and carrying out wet grinding and drying to obtain mixed powder; and adding 1-3 parts of a binder into the mixed powder, uniformly grinding, drying, carrying out compression molding, and carrying out SPS (spark plasma sintering) treatment to obtain the alumina-zirconia eutectic sintering material. The alumina-zirconia eutectic sintering material is obtained through raw material powder wet grinding, compact preparation and spark plasma sintering. The eutectic sintering material has the characteristics of high strength, high fracture toughness, good creep resistance and the like; the method is simple and easy to operate, green and environment-friendly, low in cost, short in process, high in efficiency and beneficial to industrial large-scale production and popularization.
Owner:ANHUI JINHETAI NEW MATERIALS CO LTD

Three-dimensional graphene-carbon fiber network and double-phase high-entropy alloy synergistic strengthening and toughening ceramic cutter material as well as preparation method and application thereof

The invention discloses a three-dimensional graphene-carbon fiber network and double-phase high-entropy alloy synergistic strengthening and toughening ceramic cutter material as well as a preparation method and application thereof. The material is prepared from the following components in parts by mass: 87.8 to 90.9 parts of aluminum oxide, 8 to 10 parts of AlCoCrFeNi five-element equal-atomic-ratio high-entropy alloy, 1 to 2 parts of carbon fiber and 0.1 to 0.2 part of graphene. The preparation method comprises the steps of preparation of graphene grafted carbon fibers, preparation of AlCoCrFeNi high-entropy alloy powder, preparation of aluminum oxide-high-entropy alloy-graphene grafted carbon fiber composite ceramic powder and spark plasma sintering. The ceramic cutting tool material is used for preparing high-speed cutting tools. According to the preparation method, a plastic toughening mechanism of a double-phase high-entropy alloy is organically combined with a multi-stage toughening effect of a three-dimensional graphene-carbon fiber network, and a composite ceramic material with high hardness and high fracture toughness is obtained through spark plasma sintering, so that the adaptability of a cutter under a high-speed cutting condition is remarkably improved, and the service life of the cutter under the high-speed cutting condition is remarkably prolonged.
Owner:SHANDONG UNIV

A laser directed energy deposition method for large-size Al2O3-based ceramic structural parts

The present invention discloses a laser directed energy deposition method for producing large-scale Al2O3-based ceramic components. The method comprises the following steps: Step 1: Heat-treating aluminum alloy powder and Al2O3 ceramic powder, mixing them uniformly, and then placing them in a powder feeder; Step 2: To ensure that the aluminum alloy powder is fully melted while the Al2O3 ceramic powder remains unmelted during the laser forming process, the laser forming process parameters are set: laser power of 150-500W, scanning speed of 250-1000mm / min, powder feeding rate of 1.5-8.5g / min, spot diameter of 1.5-6mm, and the oxygen content of the forming environment is adjusted to no more than 200ppm; Step 3: Activating an inert gas supply to provide powder feeding power and protective gas for the forming process, starting the powder feeder and laser, and performing the forming process. The present invention prepares large-scale Al2O3-based ceramic components with high fracture toughness and good density by doping Al2O3 powder with aluminum alloy, limiting the ratio of Al2O3 powder to aluminum alloy powder, and adjusting the parameters during the laser directed energy deposition process.
Owner:INST OF INTELLIGENT MFG GUANGDONG ACAD OF SCI

A method for preparing a porous structure Al2O3 / Al ceramic metal coating on the surface of an aluminum matrix composite

The application relates to a method for preparing a porous structure Al2O3 / Al ceramic metal coating on the surface of an aluminum-based composite material, and belongs to the technical field of surface treatment of aluminum-based composite materials. The application aims to solve the problems of the prior art, such as complicated preparation of ceramic-metal composite materials, uncontrollability, high cost, difficulty in balancing the strength and toughness of the composite material, and insufficient regulation of the thermal conductivity. The method comprises the following steps: I, pretreating the surface of the aluminum-based composite material; II, preparing a porous micro-arc oxidation coating; and III, preparing an Al2O3 / Al ceramic coating with a complete structure. The multilayer structure composite material prepared by the application has more excellent mechanical properties (high resistance to friction and wear, high thermal shock resistance, adjustable thermal expansion coefficient, high fracture toughness) and high thermal conductivity (>=100 W / mK), and has important significance for the upgrading of future packaging substrate materials and the development of composite materials for harsh deep-sea, deep-space and deep-earth environments.
Owner:HARBIN INST OF TECH

High-entropy rare earth strontium aluminate thermal barrier coating material with high fracture toughness and preparation method thereof

The application discloses a high-entropy rare earth strontium aluminate thermal barrier coating material with high fracture toughness and a preparation method thereof, and belongs to the technical field of thermal barrier coatings. 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Gd 0.2 )2SrAl2O7. The high-entropy rare earth strontium aluminate thermal barrier coating material is synthesized by a solid phase method. According to the high-entropy design of the rare earth strontium aluminate, five different rare earth elements are doped in the rare earth position, the dislocation resistance of the ceramic is increased by using the serious lattice distortion effect, and the mechanical properties are improved. Through nanoindentation test, the fracture toughness reaches 2.15MPa.m 0.5 , so that the high-entropy rare earth strontium aluminate thermal barrier coating can better prevent the growth and extension of cracks.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

High-tensile single-component bio-based epoxy structural adhesive as well as preparation method and application thereof

PendingCN122628708APolymer scienceHigh fracture
The application belongs to the technical field of epoxy resin adhesives, and more particularly relates to a high-tensile single-component bio-based epoxy structural adhesive as well as a preparation method and application thereof. The application realizes the synergistic optimization of rigidity, toughness and interfacial bonding force from the molecular structure level by constructing a multi-element synergistic epoxy matrix network with bisphenol A type liquid epoxy resin as a rigid main matrix, rubber modified epoxy resin as a toughness enhancing phase, polyurethane modified epoxy resin as a flexible buffer phase and cashew phenol based epoxy blend as a bio-based enhancing phase. Meanwhile, by adjusting the proportions of latent curing systems, water removal agents and thixotropic systems, the synergistic effect among the components is fully utilized, and the synchronous improvement of high tensile strength, high fracture toughness, good storage stability and high efficiency curing at medium temperature is realized, which perfectly meets the high-end application requirements for high performance, environmental protection and automatic construction of structural adhesives in the process of automobile lightweight integration.
Owner:HUNAN UNIV +2

Growth method for preparing high-strength sapphire crystal by kyropoulos method

The invention discloses a growth method for preparing a high-strength sapphire crystal through a kyropoulos method, and belongs to the technical field of artificial crystal growth. The mechanical strength and damage resistance of the sapphire single crystal are remarkably improved by optimizing the kyropoulos growth process. The invention particularly relates to a technology for obtaining a sapphire crystal with high bending strength, high fracture toughness and excellent thermal shock resistance by regulating and controlling thermal field distribution, an interface stress state and a defect evolution behavior in a growth process.
Owner:NINGXIA XINJINGSHENG ELECTRONIC MATERIALS CO LTD +1

Glass and strengthened glass

PCT designated stageWO2026035600A1Polymer scienceHigh fracture
A glass includes silica, alumina, boria, and yttria. The glass may have high fracture toughness, often greater than 1 MPa·m1 / 2, as well as high Vickers hardness, on the order of 800 kgf / mm2 or greater. Furthermore, Applicants find that, due to surprisingly large high-temperature coefficient of thermal expansion (e.g., over 35 ppm / °C at about 875°C) and high elastic modulus (e.g., >120 GPa) the glass may be particularly suitable for thermal tempering, which may strengthen a corresponding article comprising the glass.
Owner:CORNING INC

Transparent glass ceramic with tough zirconium oxide fibers and preparation method of transparent glass ceramic

The invention discloses transparent glass ceramic with tough zirconia fibers and a preparation method thereof, and belongs to the technical field of preparation of glass ceramic materials. The ceramic is prepared by the following steps: melting several of 52-56wt% of SiO2, 22-29wt% of Al2O3, 6-8wt% of MgO, 0.5-2wt% of B2O3, 20-2wt% of SnO, 8-15wt% of ZrO, 20-2wt% of HfO, 50-2wt% of Ta2O and 20-2wt% of TiO2, adding zirconium oxide fibers, casting a glass melt into a graphite mold, carrying out annealing treatment after the glass is formed, and carrying out heat treatment to obtain the ceramic. Cutting the formed glass, performing nucleation and crystallization heat treatment, grinding and polishing to obtain the transparent glass ceramic with tough zirconium oxide fibers. According to the invention, reasonable component design and two-step heat treatment are carried out on the base glass to form the glass ceramic in which crystals, fibers and glass coexist, and the principal crystalline phases are ZrO2 and magnesium aluminate spinel which are uniformly distributed in the glass ceramic, so that the Vickers hardness of the glass ceramic is increased by more than 8.9 GPa, and the Vickers hardness of the glass ceramic is increased by more than 8.9 GPa. And under the condition that the high fracture toughness of 2.7 MPa.m < 1 / 2 > or above is obtained, the good optical performance that the visible light wave band transmittance is 75% or above is kept.
Owner:XUZHOU NORMAL UNIVERSITY +1

A fracturing reconstruction method and application for ultra-deep high stress reservoirs

The application provides a fracturing reconstruction method and application for ultra-deep high-stress reservoirs, and mainly aims to solve the problems of high fracture pressure, small reconstruction volume and low fracture conductivity of high-stress reservoirs. Specifically, the application analyzes the fracturing problems of the current ultra-deep high-stress reservoirs, points out the limitations of the current technical measures, and proposes a new fracturing reconstruction technology for high-stress reservoirs. The technology takes the pre-composite pressure reduction process, forced fracture expansion process and fracture effective support process as the core, solves the problems of difficult fracturing, difficult fracture expansion and difficult support of high-stress reservoirs, and has good application effect.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Method for rapidly developing large-fracture toughness amorphous thin film material

The application discloses a method for rapidly developing amorphous thin film material with high fracture toughness, which comprises the following steps: depositing corresponding alloy elements on a substrate based on different element targets by using a physical vapor deposition co-sputtering method to obtain a sample library containing a plurality of amorphous thin films with different element compositions; performing potential test by using a Kelvin probe force microscope to characterize the surface potential distribution of each amorphous thin film in the sample library, and obtaining the surface potential difference of each amorphous thin film; calculating the surface electronic work function of each amorphous thin film by using the obtained surface potential difference; the composition of the amorphous thin film with the maximum electronic work function is the composition of the amorphous thin film with the maximum fracture toughness in the sample library, and the amorphous thin film material with high fracture toughness is developed according to the composition.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI

Displacement device for gas injection and oil extraction indoor experiment for synchronous core fracture forming

The utility model discloses a displacement device for a gas injection and oil extraction indoor experiment for synchronous core fracture forming, which comprises a horizontally placed core barrel, sealing covers arranged at two ends of the core barrel, a simulation injection pipe arranged on the sealing cover positioned at the front end, and a simulation extraction pipe arranged on the sealing cover positioned at the rear end, a confining pressure boosting pipe used for simulating formation pressure is arranged at the top of the middle of the rock core barrel, a sealing rubber sleeve is arranged in the rock core barrel, a simulation rock core is arranged in the sealing rubber sleeve, a plurality of fracture forming holes are formed in the side wall of the rock core barrel, a support is arranged on one sides of the fracture forming holes, and a fracture forming motor used for being in butt joint with the fracture forming holes is arranged on the support. According to the utility model, the outer wall of the rock core barrel is transformed, so that the rock core barrel can be matched with the fracture-forming motor which is placed on the bracket in advance, the rock core after displacement is finished is immediately subjected to simulated fracture-forming, the fracture-forming precision is high, the use and the operation are convenient and rapid, and the rock core fracture-forming device has guiding significance for indoor simulation of oil-gas field development.
Owner:YANCHANG OIL FIELD

A ceramic-based composite material heat dissipation substrate and its preparation method and application

The present invention discloses a ceramic-based composite material heat dissipation substrate and its preparation method and application, which relates to the technical field of ceramic heat dissipation substrate preparation. The heat dissipation substrate comprises: C f / SiC layer, CVD-SiC layer, silicon nanolayer and copper silicide layer; CVD-SiC layer is coated on C f / SiC layer, the silicon nanolayer covers the upper surface of the CVD-SiC layer, and the copper silicide layer covers the upper surface of the silicon nanolayer; C f The SiC layer is a silicon carbide ceramic-based composite material reinforced with carbon fiber cloth. The resulting ceramic-based composite heat sink substrate boasts a thermal conductivity exceeding 296 W / (m·K), high fracture toughness, and high flexural strength, making it suitable for use in high-power modules. This invention addresses the low thermal conductivity issue of existing ceramic heat sink substrates.
Owner:SDIC CERAMIC MATRIX COMPOSITES RES INST (XIAN) CO LTD

A high-entropy ceramic material with high fracture toughness and resistance to CMAS corrosion and its preparation method

The present invention discloses a high-entropy ceramic material with high fracture toughness and CMAS corrosion resistance and a preparation method thereof, and relates to the technical field of thermal barrier coatings; the high-entropy ceramic material with high fracture toughness and CMAS corrosion resistance has a chemical formula of (Gd 0.2 Dy 0.2 Er 0.2 Yb 0.2 Y 0.2 )(Nb x Ta y )O4; wherein 0≤x≤1, 0≤y≤1, and x+y=1, and the density is ≥95%. The present invention also provides methods for preparing and using the aforementioned high-entropy ceramic material with high fracture toughness and CMAS corrosion resistance. The high-entropy ceramic material of the present invention exhibits excellent fracture toughness and CMAS corrosion resistance, effectively resolving the problems of existing thermal barrier coating materials, such as unsatisfactory fracture toughness and weak CMAS corrosion resistance.
Owner:XIANGTAN UNIV

Hardware steel sheet continuous feeding structure process optimization method and system based on machine learning

This invention relates to the field of machine learning technology and proposes a machine learning-based method and system for optimizing the process of continuous material connection structures for metal steel sheets. The method includes: analyzing the fracture probability of each voxel in the metal steel sheet, aggregating voxels with high fracture probabilities into connected components to identify vulnerable areas of the metal steel sheet; setting the geometric dimensions of the temporary continuous material connection structure to be added as design variables; iteratively solving the design variables with reliability and cutting damage indices as simultaneous optimization targets to obtain a Pareto front; calculating the co-score for each solution in the Pareto front, and using the solution with the high co-score and closest to the ideal point as the continuous material connection structure parameter; and adding temporary continuous material connection structures in vulnerable areas using the continuous material connection structure parameter to achieve process optimization of the continuous material connection structure of the metal steel sheet. This invention can simultaneously adapt to the structural reinforcement requirements of the steel sheet processing process and the product quality requirements after continuous material removal.
Owner:DONGGUAN RUIYANG PRECISION HARDWARE PLASTIC CO LTD