35 results about "High fracture" patented technology

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 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.

The application provides a ceramic radome material and a preparation method thereof, and belongs to the field of ceramic radomes. First, 20-80 parts of silicon nitride powder, 40-90 parts of elemental silicon powder, 0.2-0.5 parts of a sintering aid, 1-3 parts of a binder and 0.01-0.05 parts of a surfactant are dispersed in a solvent to form a suspension with a solid content of 30-60 wt%; then, mechanical stirring foaming, directional freezing, demolding, vacuum drying and nitriding heat treatment are performed to obtain the ceramic radome material. The ceramic radome material has an apparent porosity of 36.0-76.0%, a bulk density of 1.5-2.6 g / cm 3 , a compressive strength of 50-150 MPa and a fracture toughness of 4.6-6.9 MPa·m 1 / 2 . The ceramic radome material prepared by the application has the characteristics of high open porosity, light weight and high fracture toughness, and the preparation process is simple; the weight of the radome material can be reduced while the mechanical properties and fracture toughness of the radome material are improved, and the application has a good application prospect in the field of hypersonic aircrafts and the like.

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.

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.

This application belongs to the field of cemented carbide materials technology, specifically a binderless cemented carbide, its preparation method, and cutting tools. The cemented carbide composition is: 0.2wt%~0.8wt% Ti, 0.2wt%~1.2wt% Cr, 0wt%~0.5wt% Ni, with the balance being W, C, and unavoidable impurities. Its microstructure includes a WC matrix hard phase and a (W,Ti)C solid solution needle-like reinforcing phase, and the long axis direction of the needle-like reinforcing phase has a preferred orientation within the cemented carbide, with an orientation degree of not less than 80%. In the preparation method, by adopting a Ti and Cr micro-co-alloying composition design, combined with a two-step process of pulsed plasma activated growth and pressure-induced orientation, a high-strength needle-like reinforcing phase + reinforced interface composite structure is successfully constructed in the nano WC matrix, thereby simultaneously achieving ultra-high hardness and high fracture toughness of the binderless cemented carbide, fundamentally solving the core contradiction of the difficulty in achieving both hardness and toughness in this type of material; and realizing in-situ precise control of the morphology and distribution of the reinforcing phase.

This invention belongs to the fields of powder metallurgy and materials science and technology, specifically disclosing a preparation process for a high-wear-resistant WC-based composite material. The process involves preparing WC powder, second-phase powder, and graphene material; adding the graphene material to a dispersion medium and performing ultrasonic dispersion; mixing the graphene dispersion with the WC powder and second-phase powder and ball milling; drying the mixture using a vacuum rotary evaporation drying process; and densifying it using a hot-pressing sintering process. This invention enables the WC-based composite material to simultaneously achieve high hardness and high fracture toughness; effectively inhibits oxidative wear of the WC-based composite material at high temperatures, improving its high-temperature wear resistance; and achieves uniform and stable dispersion of the graphene reinforcing phase in the WC matrix, avoiding agglomeration, thereby fully utilizing its strengthening and lubrication effects. The composite material prepared by this invention is particularly suitable for use as high-speed cutting tools, high-temperature molds, and high-temperature moving parts in aerospace applications, and has broad application prospects.

This invention relates to the field of structural ceramic materials technology, and discloses a silicon nitride-based composite ceramic material with high fracture toughness and its preparation method. The silicon nitride-based composite ceramic material with high fracture toughness comprises, by mass, the following raw materials: α‑Si3N4 70-82 parts fine powder α‑Si3N4 10-20 parts coarse flour β‑Si3N4 Seed crystals 1-4 parts Y2O3 2 ~5 parts, MgO 0.5~2.0 parts, Al2O3 0 ~1.5 parts. The preparation method includes preparing silicon nitride slurry, preparing silicon nitride composite powder with surface-loaded composite sintering aid, preparing composite particles, preparing ceramic green body, degreasing treatment, and two-stage gas pressure sintering. This invention utilizes... α‑Si3N4 fine powder and α‑Si3N4 The bimodal particle size distribution of coarse powder is beneficial to improving the packing state of raw material powder and enhancing the uniformity during molding and sintering.

The application discloses a preparation method of a layered cement-based building material, and comprises the following steps: preparing a cement-based material slurry with good rheological properties according to certain mass components; rolling the cement-based material slurry into a flat shape; attaching a separation material on the surface of the cement-based material slurry, then cutting the cement-based material slurry from the middle and folding it; and rolling again and repeating the folding-rolling operation. The cement-based building material with a microscale layered structure, high fracture toughness and excellent heat insulation performance can be prepared through the folding-rolling operation under room temperature conditions without any complex processes such as hot pressing, ice templates and laser engraving.

This invention discloses a method for preparing high-performance ZrB2-SiC ultra-high temperature ceramics for aerospace applications. First, atomic W is coated onto the surface of SiC powder using hexacarbonyl W and chemical vapor deposition. Then, the W-coated SiC powder and ZrB2 powder are mixed using electromagnetic stirring to obtain ultra-high temperature ceramic powder. Finally, SPS technology is used to densify the ZrB2-SiC ultra-high temperature ceramic. The ZrB2-SiC ultra-high temperature ceramic prepared by this invention possesses a structural characteristic that balances high density and fine grain size, exhibiting high fracture toughness and excellent high-temperature oxidation resistance, and has broad application prospects in the aerospace field.

This application provides a glycourea polythiol curing agent composition, relating to the field of polymer materials technology. The composition comprises a mixture of a glycourea trithiol compound and a glycourea dithiol compound consisting of positional isomers. This composition, used as a curing agent for epoxy resin compositions, can form a highly uniform cross-linked network structure, enabling the cured epoxy resin composition to simultaneously possess a high glass transition temperature, high flexural modulus, and ultra-high fracture toughness, achieving an excellent balance between rigidity and toughness.

The application discloses a preparation method and application of a rod-shaped A2B2O7 pyrochlore structure toughened ZTA ceramic and belongs to the technical field of zirconia toughened alumina. Raw material powders containing alumina, zirconia, an A element donor, a B element donor and a sintering aid are mixed, ball milled and sieved to obtain mixed powders; the mixed powders are granulated by adding water to obtain granulated powders; then, the granulated powders are pressed into a ceramic body which is heated and sintered, and after sintering, the ceramic body is cooled to room temperature to obtain the rod-shaped A2B2O7 pyrochlore structure toughened ZTA ceramic. According to the method, the rod-shaped pyrochlore structure phase A2B2O7 is generated in situ through the inducing effect of a specific sintering aid, so that the ZTA ceramic is toughened, the ZTA ceramic has high hardness and high fracture toughness at the same time, and can be widely applied to the fields of cutting tools, wear-resistant components and high-temperature structural parts.

This invention provides a gradient silicon nitride ceramic femoral head prosthesis and its preparation method, relating to the technical fields of clinical medicine and biomaterials. The femoral head prosthesis is prepared from 88-94 parts of silicon nitride powder, 4-12 parts of sintering aid, 5-20 parts of tungsten carbide titanium, and 0-30 parts of pore-forming agent, wherein the pore-forming agent cannot be 0 parts. The gradient silicon nitride ceramic femoral head prosthesis of this invention retains the advantages of silicon nitride ceramics—low wear, low friction, high strength, high fracture toughness, and good chemical stability—at the interface between the femoral head prosthesis and the liner, while reducing wear on the titanium alloy femoral stem cone caused by the large hardness difference between the femoral head prosthesis and the liner. This reduces the incidence of organ toxicity, periprosthetic osteolysis, and aseptic loosening caused by metal wear debris, improves the survival rate of the femoral head prosthesis and the femoral stem cone, reduces the revision rate of replacement surgery, and saves patients' treatment costs.

The application discloses a ceramic cutter with temperature sensing, pressure sensing and cutting functions and a preparation method and application thereof. The ceramic cutter is of a layered structure and comprises a ceramic base layer and a pyroelectric material layer attached to one side of the ceramic base layer. The functional material of the pyroelectric material layer is selected from one or a combination of PZT, PLZT or ZnO. The base material of the ceramic base layer is selected from one or a combination of Al2O3, Si3N4 or CBN. The doped phase of the pyroelectric material layer is selected from one or a combination of CeO2 and La2O3. The ceramic cutter integrates the cutting temperature measurement function, the cutting force measurement function and high mechanical properties, so that the cutting force and the cutting temperature can be simultaneously detected under the premise of meeting the cutting performance requirements, that is, the cutting temperature and the cutting force can be measured without additional temperature and force sensors during cutting, and the ceramic cutter has the advantages of simple structure, small volume, high hardness, high bending strength and high fracture toughness, convenient installation and the like.

To provide a socket for channel materials with high fracture strength at the fastening portion. [Solution] The channel material socket 10 has a connecting portion 11 at one end that is connected to a rotary tool, a fastening portion 12 at the other end for fastening a screw, and a connecting portion 13 between the connecting portion 11 and the fastening portion 12. The outer circumference 12a of the fastening portion 12 is circular with an outer diameter smaller than the inner width of the channel material, and the inner circumference 12b of the fastening portion 12 is a regular hexagon. The connecting portion 13 is formed by a circular arc (with a radius of curvature of 1.0 mm or more) with a line constituting the inner circumference 12b of the fastening portion 12 as its tangent in a cross-section that includes the rotation axis direction of the fastening portion 12 and a direction perpendicular to the opposing sides of the inner circumference 12b.

The application discloses a preparation method of an aluminum alloy profile for a new energy automobile battery, and relates to the technical field of aluminum alloy materials.The alloy components are prepared according to mass percentages, and the alloy components include Si 0.87-1.02%, Mg 0.2-0.7%, Mn 0.15-0.2%, Fe 0.3-0.6%, Ti 0.03-0.04%, Ce 0.1-0.5%, Sr 0.01-0.03%, Sb 0.1-0.3%, V 0.015-0.07wt%, copper-coated mica powder 3-6% and the balance of Al; the copper-coated mica powder is added into a melt in batches, and potassium fluoroborate is added in a smelting process to perform secondary refining; after ultrasonic treatment, the following steps are sequentially performed: casting, homogenization treatment, extrusion forming, annealing treatment and aging treatment.The aluminum alloy profile prepared by the application has high strength, high fracture toughness and excellent impact resistance, can effectively resist collision deformation and prevent battery short circuit.

The goal is to suppress taxi wear and touchdown wear while ensuring high fracture pressure without significantly increasing weight. [Solution] In the first reference state, the conditions 0 ≤ δ35 / Rc ≤ 0.004 and 0.015 ≤ δ90 / Rc ≤ 0.025 are satisfied, and the belt layers 5a to 5i include two or more spiral belt layers 51 and one or more zigzag belt layers 52, and the two or more spiral belt layers 51 include a first spiral belt layer 511 whose tire width direction edge 51c is located outside the tire width direction of the shoulder circumferential groove 812, and a second spiral belt layer 512 whose tire width direction edge 51c is located between the center circumferential groove 811 and the shoulder circumferential groove 812.

The invention is related to nickel-based metallic glass alloys that can be produced in an amorphous structure, that contain metals with a high melting point and a high boron content, and that, when subjected to heat treatments above their crystallization temperatures, both a phase with high fracture toughness (nickel solid solution) and borides with high hardness values can be precipitated.

To provide a socket for channel materials with high fracture strength at the fastening portion. [Solution] The fastening part 12 has a connecting part 11 at one end that is connected to a rotary tool and a fastening part 12 at the other end for fastening a screw. The outer circumference of the fastening part 12 is circular with an outer diameter smaller than the inner width of the channel material, and the inner circumference of the fastening part 12 is a regular hexagon. In a cross section perpendicular to the rotation axis of the fastening part 12, the distance between opposing sides of the inner circumference is S i (mm), the distance between opposing corners is D i A socket for channel material that satisfies the following formula, given (mm). TIFF2026110356000005.tif1898

The application provides a 99 alumina structural ceramic, and solves the problems of performance reduction of ceramic products, high cost, and large loss of kiln and kiln furniture caused by high-temperature sintering. The 99 alumina structural ceramic comprises the following raw materials: alumina, magnesium oxide, silicon oxide and rare earth oxide; the alumina comprises flaky alumina, and the content of the flaky alumina is greater than 0 and less than or equal to 20% based on the total mass of the 99 alumina structural ceramic raw materials. The cooperation between the above 99 alumina structural ceramic raw materials is beneficial to reducing the sintering temperature to reduce the cost and the loss of the kiln and the kiln furniture; and the obtained 99 alumina structural ceramic product has high fracture toughness and strength.

Disclosed herein is a method of consolidating by liquid phae sintering a new class of designed-microstructure particulate material with unprecedented combinations of property extremes called Tough-Coated Hard Powders (TCHPs). The method generally comprises providing a plurality of core particles, wherein the core particles comprise a core material of a first compound; providing an intermediate layer on a majority of the core particles, the intermediate layer comprising a second compound, different in composition from the first compound and having a higher relative fracture toughness, the second compound being capable of bonding with the first compound and being capable of bounding with a metal chosen from iron, cobalt, nickel, copper, titanium, aluminium, magnesiu, lithium, beryllium, silver, gold, and platinum and their mixtures, thereby forming coated particles; and applying an outer layer to the coated particles, the outer layer comprising a metal chosen from iron, cobalt, nickel, and their mixtures to form a substantially continuous outer layer on said intermediate layer, thereby forming component particles of the particulate material; shapping a plurality of the component particles into an article; and sintering the articles to substantialy full density without significant external pressure at a temperature sufficient to liquefy and portion of the outer layer, and for a time sufficient to liquefy a portion of the intermediate layer. The disclosed method leads to sintered particulate materials that may be individually coated with nanolayers of a metal compound having a relatively higher fracture toughness, such a WC or TaC. These coated particles may be additinally coated with a second layer comprising a binder metal, such as Co or Ni. This unique material resuls in multiproperty alloys within the TCHP sintered structure, thus allowing for a combination of normally conflicting performance extremes, including, but not limited to toughness, abrasiveness, chemical wear resistance, and light weight, at levels heretofore unseen in the powder metallurgical art.

This application provides a ventricular assist system and its connector. The connector includes a body and a connecting assembly. The connecting assembly includes a first housing, a cable component, and a sealing component. One end of the first housing is sealed to the body, and the other end has an opening. The cable component is electrically connected to the body and passes through the opening. The sealing component includes a sealing sleeve and a protective sleeve. The sealing sleeve is fitted onto the cable component and passes through the opening. The protective sleeve is housed within the first housing and fitted onto the cable component. The ends of the protective sleeve and the sealing sleeve located within the first housing are sealed together. When the first housing is connected to the body, both ends of the protective sleeve are clamped between the first housing and the body. At least one of the protective sleeve and the cable component is sealed to the body. The protective sleeve has a higher fracture strength than the sealing sleeve. The above connector has good sealing performance, which can prevent liquid from entering and affecting the reliability of the internal electrical connection of the connector.

This invention provides a multi-rare-earth modified zirconia ceramic material, its preparation method, and its application. The chemical composition of the multi-rare-earth modified zirconia ceramic material is La. x Ce y Gd z Yb s Y t Zr 1‑x‑y‑z‑s‑t O δ , where 0 < x <1;0< y <1;0< z <1;0< s <1;0< t <1;0<1- x - y - z - s - t <1;0< δ <2. This material possesses excellent high-temperature phase stability, high coefficient of thermal expansion, low thermal conductivity, and high fracture toughness, enabling it to meet the higher service temperature requirements of thermal barrier coatings.

The application belongs to the technical field of polymer materials, and discloses a kind of high toughness nano-modified EVA plastic particles and preparation method thereof.The plastic particles are composed of EVA matrix, organic template molecules and in-situ generated nano calcium carbonate or calcium phosphate, wherein the organic template molecules guide the inorganic phase to form a gradient distribution and brick-mud staggered structure in the matrix.Through in-situ mineralization and shear field regulation in the double screw extrusion process, the ordered arrangement of nano phase and interface strong coupling are realized.The application solves the problem of nano particle agglomeration in EVA melt, improves the fracture toughness and impact resistance of the material, optimizes the overall mechanical property matching of the material, simplifies the formula system, does not need to add additional compatilizer or coupling agent, is compatible with existing EVA processing equipment, does not need complex post-treatment, has good industrialization prospect, and the obtained material has high tensile strength, high elongation at break and excellent impact toughness.

The application discloses a high-toughness zirconia-based ceramic with a grain boundary monoclinic phase structure, wherein a matrix phase is, a monoclinic phase layer with controllable thickness exists at a grain boundary, a tetragonal phase / monoclinic phase / cubic phase or a tetragonal phase / monoclinic phase / cubic phase interface structure is formed, the monoclinic phase layer has an orientation relationship with adjacent grains, and is accompanied by a misfit dislocation belt or a strain zone, so that crack deflection and energy dissipation are induced under an external load. The material is obtained by adding an interface regulation additive in a powder system and sintering at 1400-1500 DEG C under a low oxygen partial pressure or a carbon thermal reduction atmosphere. The ceramic material of the application can induce crack deflection, bifurcation and passivation under loading, is accompanied by a phase transition at a crack, realizes interface-dominated energy dissipation, and improves the fracture toughness and the bending strength.

The application relates to the field of high-performance glass lining enamel materials, and discloses an Al2O3@Bi2O3 / CNT reinforced glass lining enamel as well as a preparation method and application thereof. The enamel comprises a base glaze and Al2O3@Bi2O3 / CNT composite reinforcing bodies dispersed in the base glaze. The composite reinforcing bodies are loaded on the surface of CNT, and the core-shell structure particles are loaded on the surface of CNT, wherein Al2O3 is used as the core, and Bi2O3 is used as the shell. The preparation method comprises the following steps: preparing Al2O3@Bi2O3 core-shell particles by using a hydrothermal method; treating CNT by using acid oxidation and coating an Al(OH)3 intermediate layer; chemically bonding the core-shell particles and the CNT coated with the Al(OH)3 intermediate layer by using a KH-560 coupling agent; and finally, mixing the base glaze by using a ball mill. The obtained enamel has high hardness, high bending strength, high fracture toughness and excellent acid corrosion resistance, and is suitable for lining the glass lining equipment of chemical reaction kettles, storage tanks, pipelines, heat exchangers and mixers.

This invention relates to the field of alloy material processing technology and discloses a sintering method for a toothed cemented carbide thin cutting tool. After the cutting tool blank is prepared, it undergoes gradient heating sintering. The sintering conditions are as follows: a graphite column is placed in the blank hole, the temperature is raised from room temperature to 620℃ for dewaxing, and then the temperature is raised to 1420℃-1460℃ and held for 0.5-1 h under pressure. This invention addresses the shortcomings of existing technologies by using graphite column assistance combined with gradient sintering. The segmented heating controls grain growth, and the final pressure sintering improves density. The synergistic effect of these two methods is far superior to single parameter adjustment, enabling the cutting tool to possess both high hardness and high fracture toughness, achieving the required mechanical properties. By fixing the center positioning, the eccentricity of the inner hole is avoided, which leads to the wobbling of the outer tooth profile, reducing the deformation of tooth tip height, tooth thickness, and tooth profile angle, and improving the consistency of the cutting edge profile. The 0~0.01mm micro-gap design ensures both support and deformation suppression, while also preventing cracking during blank sintering, significantly improving the yield rate.

The application relates to an Al2O3 / Cr / Cr3C2 composite submersible nozzle and a preparation method thereof. The technical scheme is as follows: aluminum powder, chromium oxide powder and carbon powder are mixed to obtain mixed powder; the mixed powder, anhydrous ethanol and ball milling beads are placed in a ball mill to obtain mixed slurry; the mixed slurry is dried to obtain mixed powder; the mixed powder is ground to obtain ground powder; the ground powder is loaded into a graphite mold and sealed; the sealed mold is placed in a hot-pressing sintering furnace, vacuumized, CO is introduced, heated to 1550-1750 DEG C, pressurized, and kept warm and pressurized; then the furnace is cooled to room temperature, demoulding is carried out, and the Al2O3 / Cr / Cr3C2 composite submersible nozzle is prepared. The application has the characteristics of high fracture toughness, high high-temperature strength, good wear resistance, good thermal shock resistance, excellent erosion resistance, long service life and the ability to process complex structures, and can effectively avoid carbon-induced steel deterioration.