131 results about "High fracture" patented technology

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.

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%.

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.

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.

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.

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.

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.

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.

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.

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.

The utility model relates to the technical field of fishing gears, and discloses a glass fiber reinforced plastic fishing rod with high fracture resistance, which comprises a telescopic fishing rod main body, annular reinforcing rings are arranged at the joints of sections of the telescopic fishing rod main body, the telescopic fishing rod main body comprises a base body layer, and a net-shaped inner layer is fixedly arranged on the outer wall of the base body layer. The outer wall of the net-shaped inner layer is fixedly provided with the mixed middle layer, the outer wall of the mixed middle layer is fixedly provided with the fiber outer layer, and the telescopic fishing rod body, the annular reinforcing ring, the base body layer, the net-shaped inner layer, the mixed middle layer and the fiber outer layer are arranged, so that the fishing rod is higher in overall strength and better in fracture resistance; the strength and the fracture resistance of the fishing rod at the joint of the sections are improved, the fishing rod is prevented from being broken due to bending in the using process, and the toughness and the tear resistance of the fishing rod are improved through the net-shaped inner layer made of the Kevlar fiber material.

Glass-based articles comprise stress profiles providing improved fracture resistance. The stress profiles contain a high peak tension and a region with a high degree of negative curvature. The glass-based articles herein provide high fracture resistance after multiple drops.

The application belongs to the technical field of thermal protection coating materials, and discloses a bonding layer material for thermal barrier / environment barrier coating, a preparation method of the bonding layer material, a thermal barrier / environment barrier coating and an engine. 13 The bonding layer material for the thermal barrier / environment barrier coating comprises xSiC*yAl6Si2O 13 zHfSiO4*(1-x-y-z)HfO2, wherein x, y and z are volume percentages, x=0%~70%, y=0%~70%, z=0%~70%, and 30%≤x+y+z≤70%. The bonding layer material for the thermal barrier / environment barrier coating can improve the use temperature of a substrate, and has the advantages of high melting point, low thermal expansion coefficient and high fracture toughness.

The disclosure is directed to methods for spalling a substrate, products made by performing the methods, and apparatus and medium capable of performing the methods. One method includes obtaining a substrate; depositing a seed layer on the substrate; generating an edge around the seed layer for crack initiation in the substrate; and electroplating a stressor layer on the seed layer in an electroplating bath to spall the substrate to obtain a spalled substrate and a spalled film.

Disclosed herein are a steel material for a high-strength line pipe with high fracture toughness in hydrogen in a high-pressure hydrogen gas environment, a method for producing the steel material, a steel pipe for a high-strength line pipe, and a method for producing the steel pipe, suitable for a steel structure used in a high-pressure hydrogen gas environment, such as a line pipe for 100% hydrogen gas or a natural gas containing hydrogen at a hydrogen partial pressure of 1 MPa or. The steel material for a high-strength line pipe with high fracture toughness in hydrogen has a specific composition and a specific microstructure, has a tensile strength of 520 MPa or more, and has a hydrogen-induced crack growth threshold KIH of 80 MPa·m1 / 2 or more in a high-pressure hydrogen gas environment of 1 MPa or more.

The application provides a high fracture toughness titanium type flux-cored wire for ocean engineering, wherein the flux-cored wire comprises non-metallic flux powder and metallic flux powder. The application optimizes the deoxidizer component in the formula of the flux-cored wire, establishes the formula of the new titanium type flux-cored wire for ocean engineering, and effectively improves the low-temperature impact toughness and fracture toughness of the welded joint while meeting the use of ocean engineering.

The application belongs to the technical field of protective materials, and particularly relates to a carbide-based nanocomposite film and a preparation method and application thereof. The carbide-based nanocomposite film provided by the application has a significant improvement in fracture toughness and further improvement in wear resistance on the premise of maintaining the high strength of carbide, and is a material with high hardness, high fracture toughness and high wear resistance. The carbide-based nanocomposite film is obtained by periodically introducing CrMnFeCoNi alloy nanolayers into carbide nanolayers through a magnetron sputtering technology. The carbide-based nanocomposite film provided by the application effectively combines the excellent fracture toughness of CrMnFeCoNi alloy, the high hardness and high wear resistance of carbide, and has a low and stable friction curve, good friction performance, can meet harsh service environments, and greatly improves the service life of materials and equipment.

The present invention relates to a glass-ceramic material for coating a glass or glass-ceramic disc and to the disc coated with the material. It has high optical density, high fracture strength, and high flexural strength.

The application discloses an aluminum nitride-based composite ceramic carrier and a preparation method thereof, and belongs to the technical field of composite ceramic material preparation. The carrier is prepared from aluminum nitride as a base material, and a specific proportion of beta-Sialon precursor powder and Y2O3-ZrO2 composite sintering aids. The preparation method comprises the following steps: treating raw materials by adopting a high-speed and low-speed ball milling process, and then performing two-stage composite sintering of electric discharge plasma sintering and hot-press sintering in sequence. Through the synergistic design of the material formula and the process, the columnar beta-Sialon grain network and the metastable tetragonal phase ZrO2 generated in situ are utilized to construct a multi-stage toughening system while the super-high thermal conductivity of the aluminum nitride base is maintained, so that the material has high fracture toughness and excellent thermal shock resistance, and is especially suitable for an automobile exhaust treatment system with strict requirements on rapid ignition and long-term reliability.

The present application belongs to the technical field of energetic materials and active fragment materials, and more particularly relates to an energetic composite connector based on hard alloy and tungsten-containing amorphous alloy, a preparation method and application thereof. The penetration ability and damage effect of energetic materials are fully considered, and the present application selects hard alloy as the penetration part and tungsten-containing amorphous alloy composite material as the fragment part. The hard alloy has high hardness and high fracture toughness, and can effectively penetrate the shell; the amorphous alloy composite material has high strength, high energy density and good plastic deformation capacity, can deflagrate at a high strain rate and release a large amount of energy, and produce a large amount of fragments to cause damage to the target. The integration of the preparation and connection of the hard alloy penetration part and the amorphous alloy composite material fragment part can be realized by discharge plasma sintering, thereby solving the technical problems that the inert energetic materials in the prior art cause the personnel and weapon equipment to suffer losses due to "hitting but not destroying" the target.

The application discloses a method for improving surface quality and fracture toughness of flexible glass, and belongs to the technical field of glass preparation. The method comprises the following steps: (a) cleaning and drying a flexible glass substrate; (b) immersing the flexible glass treated in step (a) into a mixed solvent composed of a hydrofluoric acid solution, a sulfuric acid solution, a hydrochloric acid solution and an oxalic acid solution, and performing acid etching treatment at 15-60 DEG C, then taking out and washing with pure water, drying, and then performing heat preservation treatment; (c) placing the flexible glass treated in step (b) into a preheated strengthening solution to perform ion exchange strengthening treatment, and then cooling to room temperature to obtain finished flexible glass. The method can effectively improve the fracture toughness of the flexible glass.

The purpose of the present invention is to provide a matrix high-speed tool steel having high softening resistance and a high fracture toughness value. In order to achieve the purpose, provided is a matrix high-speed tool steel comprising, in mass%, 0.45-0.60% C, 0.05-0.30% Si, 0.20-1.20% Mn, 0.01-1.00% Ni, 2.00-3.00% Cr, 0.003-0.100% Al, 0.80-1.30% V, 0.01-0.30% Nb, 2.00-4.00% Mo+0.5W, 0.003-0.040% N, and Fe and unavoidable impurities as the remainder. The unavoidable impurities have a P content of 0.050 mass% or less, an S content of 0.010 mass% or less, a Cu content of 0.30 mass% or less, and an O content of 0.050 mass% or less. The matrix high-speed tool steel has an areal primary-carbide proportion F of 0.40-0.70% and has a hardness after quenching and tempering of 55 HRC or greater.

The invention discloses a high-toughness 3D printing material and a manufacturing method thereof.The high-toughness 3D printing material is prepared from, by mass, 80-90 parts of basic resin, 1-5 parts of plasticizer, 0.1-0.5 part of heat stabilizer, 0.5-2 parts of lubricant, 0.2-1 part of nucleating agent, 0.2-1 part of moisture-proof agent, 0-4 parts of dye and 10-20 parts of reinforced fibers.The manufacturing method comprises the following steps that firstly, raw materials are dried, secondly, additives are premixed and treated, and thirdly, the high-toughness 3D printing material is obtained. The preparation method comprises the following steps of 1, pre-mixing the raw materials, 2, pre-mixing the raw materials, 3, mixing the raw materials at normal temperature, 4, feeding the pre-mixed materials into a co-rotating parallel twin-screw extruder, and extruding from a mold opening, and 5, cooling, pelletizing and drying. 6, the dried particles are fed into a single-screw extruder, and the high-temperature wire is extruded, by adding the reinforced fibers and conducting the extrusion technology twice in the manufacturing process, the toughness is obviously improved compared with a traditional 3D printing material, and the conditions of high fracture and cracking cannot occur.

The invention relates to curable compositions made of reaction resins, comprising polymerizable functional cyanate ester groups and poly(diorgano)siloxanes with phenolic hydroxy groups; to a method for producing the same; and to cured materials and composites obtainable therefrom and having a low water uptake, a high fracture toughness and a high glass transition temperature.

The present invention belongs to the technical field of the manufacturing of low-alloy steel for ships. Disclosed are a 51kg-grade BCA2 crack-arrest steel having high CTOD characteristics, and a manufacturing method therefor. The crack-arrest steel comprises the following chemical components in percentages by weight: C: 0.05％-0.13%, Si: 0.15％-0.40%, Mn: 1.20％-1.60%, P: 0.007％-0.012%, S≤0.01%, Al: 0.01％-0.05%, Nb: 0.007％-0.050%, Ti: 0.006％-0.012%, Ni: 0.50％-1.00%, Cu: 0.35％-0.75%, V: 0.03％-0.08%, one or more of Cr, Mo and RE, wherein Cr: 0.10％-0.30%, Mo: 0.08％-0.15% and RE: 0.02％-0.05%, and the balance of Fe and inevitable impurities. By using a specific composition system and a specific production process and also regulating the phase composition and texture components of a product, a crack-arrest steel having technical features such as ultra-high strength, low-temperature resistance, good weldability, high fracture toughness and crack-arresting capability is obtained. The obtained crack-arrest steel is not only suitable for key parts such as a hatch coaming and an upper deck keel of an ultra-large container ship, but can also be used for large welded structures bearing alternating loads and having high fracture toughness requirements.

This invention discloses a silicon carbide ceramic material, its preparation method, and its applications, belonging to the field of silicon carbide ceramic preparation technology. The preparation method involves sintering silicon carbide fibers under a vacuum atmosphere using discharge plasma. During the sintering process, a three-dimensional interlocking structure forms between the silicon carbide fibers, and the graphite carbon inside the fibers forms a conductive network, resulting in the silicon carbide ceramic material. This silicon carbide ceramic material exhibits high electrical conductivity, high fracture toughness, and excellent high-temperature stability.

The invention discloses an Al-Mg-Zn aluminum alloy with ultrahigh strength, high toughness and high magnesium content and a preparation method of the Al-Mg-Zn aluminum alloy. The alloy contains 83.30 wt%-89.51 wt% of Al, 6.0 wt%-9.9 wt% of Mg, 4.01 wt%-5.50 wt% of Zn, 0.025 wt%-0.6 wt% of Si and at least one of Mn, Cu, Zr, Sc, Ti, Be and Sb, wherein the total content of the Mn, the Cu, the Zr, the Sc, the Ti, the Be and the Sb is not larger than 0.7 wt%. The contents of Mg, Zn and Si meet the relational expression: 0.83 < = [(2 * Mg) + Si] / [(3 * Zn)-(0.2 * Mg)] < = 2.03. The preparation method of the aluminum alloy deformation processing material comprises the following steps: (1) manufacturing an aluminum alloy cast ingot; (2) homogenizing heat treatment; (3) processing into a processing material; (4) solid solution heat treatment; (5) cooling to room temperature; and (6) aging treatment. The aluminum alloy has low density, high strength and high fracture toughness.

The present invention relates to curable mixtures of reactive resins having polymerizable functional cyanate groups and linear poly (bisphenol-diorganosiloxane) copolymers, to a method for the production thereof, and to cured materials and composites obtainable therefrom which exhibit high fracture resistance. The invention based on the patent application is a result of a project funded by the Federal Education Institute under the funding code 03XP0170C. The content of the patent application is responsible for the applicant.

The invention discloses high-strength impact-resistant tempered glass and a preparation method thereof, and belongs to the technical field of inorganic non-metallic materials. A rare earth doped Al2O3-ZrO2 nano-composite precipitated phase is uniformly dispersed and distributed in a tempered glass matrix, and the rare earth doped Al2O3-ZrO2 nano-composite precipitated phase is composed of Y3 + or Ce4 + stabilized tetragonal phase ZrO2 and spinel type Al2ZrO5; the glass has a gradient stress structure, and comprises an upper surface compressive stress layer, a lower surface compressive stress layer and a subsurface toughness buffer area positioned below the upper surface compressive stress layer and the lower surface compressive stress layer, and the buffer area is in a micro-tensile stress state and contains the nano-composite precipitated phase. Through the collaborative design of rare earth doped nano phase change toughening and asymmetric gradient stress, the mechanical property of hard surface and tough interior is achieved, the impact resistance height is high, the fracture toughness is large, the structural integrity is still kept after multi-point impact, and the composite material is particularly suitable for high-safety-requirement scenes such as building curtain walls, explosion-proof windows and new energy automobile skyscreens.