249 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 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.

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.

A high-strength, highly transparent nanocrystalline glass, a preparation method therefor, and a use thereof. The high-strength, highly transparent nanocrystalline glass uses precursor minerals mainly comprising synthetic aluminum-rich feldspar-like ceramic glass material, β-spodumene material, cordierite material, synthetic β-dicalcium silicate material, and magnesium aluminum spinel material for the main body of a feldspar-like matrix glass having a stable structure. Ultrafine zirconia powder having a particle size of less than 10 nm is used as a nucleating agent and microcrack damping and pinning agent, to control the formation of nanocrystals smaller than 100 nm in the glass body formed after melting. The volume percentage content of the nanocrystals is 50%-95%, and the nanocrystals together with the matrix glass form a high-strength, highly transparent nanocrystalline glass having a uniform microstructure. The obtained nanocrystalline glass has high hardness, high fracture toughness and high light transmittance, and is suitable for manufacturing various types of optical glass.

The invention provides a fluororesin fluororubber composite material with high fracture work and a preparation method thereof, and the fluororesin fluororubber composite material comprises the following raw materials by weight: 100-120 parts of fluororubber; 20 to 40 parts of fluororesin micro powder; 1-8 parts of a cross-linking agent; and 0.1-6 parts of an assistant cross-linking agent. The fluororesin and fluororubber composite material disclosed by the invention not only can improve the fracture energy, but also can improve the cleanliness, and also can improve the etching gas resistance.

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.

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.

The invention belongs to the technical field of ceramic materials, and relates to complex-phase high-entropy ceramic as well as a preparation method and application thereof. The technical problem that in the prior art, high-entropy ceramic cannot synchronously have high hardness and fracture toughness is solved. The invention provides a complex-phase high-entropy ceramic. The complex-phase high-entropy ceramic comprises a carbonitride phase and a single boride phase, the transition metal elements comprise titanium, zirconium, niobium, tantalum and hafnium; in the complex-phase high-entropy ceramic, calculated according to the volume content, 93Vol% is smaller than or equal to the carbonitride phase lt; 100 Vol%, 0 Vol% lt; and the single boride phase is less than or equal to 7Vol%. The complex-phase high-entropy ceramic has the advantages of uniform two-phase distribution, small grain size, high density, high hardness and high fracture toughness. The invention further provides a preparation method of the complex-phase high-entropy ceramic, a liquid-phase precursor method is combined with an in-situ hot pressing sintering method, the process is simple, and the production period is short. Meanwhile, the invention further provides application of the complex-phase high-entropy ceramic in material preparation in the fields of aerospace and mechanical engineering.

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.

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 present invention relates to a heat treatment method for improving the strength-ductility matching of metastable β titanium alloys, comprising the following steps: (1) heating a forged blank of a metastable β titanium alloy with a basketweave structure to a solution holding temperature in the two-phase region; (2) directly furnace cooling the solution-treated alloy to 500°C - 650°C, and then taking it out for air cooling; (3) aging the alloy treated by solution treatment, furnace cooling and air cooling at 500°C - 650°C for 4 h - 8 h, and finally taking it out for air cooling. By means of two-phase region solution treatment, furnace cooling + air cooling, and aging + air cooling, and through the selection of heat treatment temperature, time and cooling method, the present invention can finely regulate the microstructure of metastable β titanium alloys, obtain a heterogeneous structure of micron-scale strip-shaped primary α + nano-scale needle-shaped secondary α + residual β phase, so that the metastable β titanium alloy has an excellent matching of high strength, high ductility and high fracture toughness.

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.

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.

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.

To provide a silicon nitride sintered substrate which achieves both high fracture toughness and high flexure strength.SOLUTION: A silicon nitride sintered substrate includes: surface layers being present on both surfaces and consisting of silicon nitride sintered particles of which the average circle corresponding diameter is 2.0 to 10.0 μm and the average aspect ratio is 3 or more; and an inner layer consisting of silicon nitride sintered particles of which the average circle corresponding diameter is 5.0 μm or less and the average aspect ratio is less than 3. It is preferable that a thickness of each surface layer of the silicon nitride sintered substrate is 0.01 mm or more and a total thickness of both the surface layers is equal to or less than 35% of a thickness of the silicon nitride sintered substrate.SELECTED DRAWING: None

The present invention discloses a high fracture strain hot stamping forming component, a steel sheet for hot stamping, and a hot stamping process. Through innovative alloy compositions and hot stamping processes, the structure and mechanical properties after hot stamping are flexibly regulated, and the fracture strain of the hot-formed steel is increased to ensure the energy absorption effect. By using Ti and Nb elements to combine with C and N atoms in the steel, the dissolved C / N atoms are consumed, and nanoscale second-phase particles are formed and uniformly dispersed on the matrix, reducing the hardness difference at the ferrite-martensite interface and effectively improving the plasticity and toughness of the material; the materials involved are relatively simple, and the alloy cost is low. The preparation process of the steel sheet for hot stamping and the hot stamping process window are wide. Based on the control of the transfer time of the hot stamping blank, the flexible control of the content of epitaxial ferrite (oriented attached ferrite) is realized, and finally the preparation of hot stamping forming components with different strength grades after hot stamping is realized, which is very beneficial to the popularization of integrated door rings and will effectively contribute to automotive lightweighting and safety energy absorption management.

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.

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.

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 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 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.

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.

The invention belongs to the technical field of composite ceramics, and discloses a CoSi2 alloy toughened high-entropy carbide composite ceramic as well as a preparation method and application thereof. The composite ceramic is (Ti0. 2Zr0. 2Nb0. 2Ta0. 2Mo0. 2) C-CoSi2, and is prepared by the following steps: mixing TiO2 powder, ZrO2 powder, Nb2O5 powder, Ta2O5 powder, MoO3 powder and carbon powder to obtain mixed powder, adding the mixed powder into absolute ethyl alcohol, stirring to obtain slurry, carrying out ball milling, drying and sieving, carrying out dry pressing to obtain a green body, sintering at 1000-1600 DEG C in a protective atmosphere, mixing the prepared high-entropy powder and CoSi2 powder, carrying out ball milling, drying and sieving, and carrying out dry pressing to obtain a green body; the composite ceramic is prepared through SPS sintering under the uniaxial pressure of 25-30 MPa and at the temperature of 1500-1700 DEG C. The composite ceramic has the advantages of high density, high hardness, high fracture toughness and the like, and can be applied to the field of preparation of materials difficult to cut.

To improve versatility and simplicity of fracture toughness value perdition.SOLUTION: A fracture toughness value prediction method is provided, involving acquiring a fracture toughness parameter at the time when a locally generated stress on a test piece evaluation part in a fracture toughness test as obtained through a first numerical analysis reaches a local breaking stress at a fracture initiation point obtained based on a brittle fracture test as a fracture toughness value of a target material.SELECTED DRAWING: Figure 2

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 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.

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.

The present invention discloses a kind of ultra-high fracture toughness, high strength, high fluidity green ultra-high performance concrete and its preparation method, and belongs to the technical field of ultra-high performance concrete. The present invention uses alkali-activated concrete as a substrate, and by internally doping modified sisal fiber and modified graphene-PE fiber, obtains ultra-high fracture toughness, high strength, high fluidity green ultra-high performance concrete with the advantages of high mechanical strength, fast setting speed, good fluidity, high construction performance and durability, which can be widely used in bridge engineering and road engineering. The present invention uses industrial waste such as desulfurization ash and coal gangue as raw materials, which can solve the problems of industrial waste stacking, turn waste into treasure, save resources and protect the environment.

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.