159 results about "Low elastic modulus" patented technology

The present invention addresses the problem of providing a thermosetting resin composition that contains a low-viscosity modified resin and that can realize a low thermal expansion and low elastic modulus. The present invention provides a thermosetting resin composition that contains a thermosetting resin (A), a curing agent (B), a modified resin (C), and at least one filler (D) selected from the group consisting of inorganic fine particles and fibers, the thermosetting resin composition being characterized by containing a modified resin (C) in which the ether concentration is 11.5 to 23 mol / kg. The present invention also provides a cured product from the thermosetting resin composition, as well as a semiconductor sealing agent, a semiconductor device, an insulating material for printed wiring boards, and a printed wiring board, in each instance containing the thermosetting resin composition.

The invention discloses a heat treatment method of a high-strength and high-plasticity Ti-Nb-O titanium alloy, the titanium alloy comprises three elements of Ti, Nb and O, and the components comprise 13-22 wt% of Nb, 0.3-0.9 wt% of O and the balance Ti and inevitable impurities; through the design of a solid solution and aging heat treatment scheme, Nb and O elements in the structure are reasonably distributed in an alpha phase and a beta phase, finally, the alloy structure is controlled to contain the alpha phase and the beta phase, and a large number of nanometer martensite domains exist in the beta phase; the tensile strength of the alloy can reach 1100 MPa or above, the ductility is larger than 15%, and the elasticity modulus is smaller than 65 GPa. The high-strength and high-plasticity Ti-Nb-O titanium alloy has the characteristics of high strength, high plasticity, low elastic modulus, excellent biocompatibility and the like, is simple in component, reduces the preparation difficulty and cost, has important theoretical significance and engineering value, and is suitable for manufacturing biological implantation medical devices.

Disclosed is a foundation component having an elongated open shaft, an external thread form beginning at a first end and extending along the shaft, a driving coupler at a second end, opposite to the first end, and a cone received by the first end and extending from the first end. The cone is of a material having a lower elastic modulus than the elongated open shaft.

The invention provides a novel TPMS porous structure interbody fusion cage, and relates to the technical field of medical materials. The interbody fusion cage is designed by using a porous frame structure with different unit cell sizes and porosities, so that the biocompatibility of the interbody fusion cage is enhanced, the interbody fusion cage has higher mechanical properties, large static compression load and low elastic modulus, the elastic modulus is closer to that of human cortical bones, the stability of an implant in the early stage of osseointegration is improved, and the interbody fusion cage is suitable for being used in the field of osteosynthesis. Under the same porosity, the elastic modulus is lower, and the comprehensive performance is excellent.

The present invention generally relates to inherently wettable silicone hydrogel contact lenses having relatively high oxygen permeability, relatively high equilibrium water content and relatively low elastic modulus. The present invention is also related to a method for making such inherently wettable silicone hydrogel contact lenses.

The invention provides a method for preparing an ultra-low elastic modulus titanium alloy based on machine learning and the titanium alloy, and the method comprises the following steps: obtaining component elastic modulus data of the titanium alloy according to a given titanium alloy component; dividing the component elasticity modulus data of the titanium alloy into a training set and a verification set, and virtually generating a to-be-explored titanium alloy component space according to constraint conditions; training a preset elastic modulus prediction model through a domain adversarial neural network, the training set and the to-be-explored titanium alloy component space; through the trained preset elastic modulus prediction model and a genetic algorithm, the components of the titanium alloy with the ultralow elastic modulus are obtained; according to the components of the titanium alloy with the ultralow elastic modulus, the titanium alloy with the ultralow elastic modulus is prepared through electric arc melting. By utilizing the method, the problem of overfitting caused by data sparsity, component discontinuity and characteristic heterogeneity is relieved, so that high-precision exploration of an unknown component space is realized.

The invention discloses a high-strength plastic titanium alloy and a preparation method thereof, and belongs to the technical field of titanium alloy materials. The structure of the titanium alloy is single equiaxed beta-Ti grains, and the titanium alloy comprises the following components: 23-25% of Nb, 5-8% of Zr, 2-5% of Sn, 0.5-1.5% of O and the balance of Ti and inevitable impurity elements. The preparation method comprises the steps of alloy casting, multi-stage homogenizing annealing, multi-pass DSA rolling, aging treatment, warm rolling, surface supersonic particle bombardment and the like. Oxygen atoms are introduced to form a local chemical ordered structure, dispersion strengthening of nano-particles is induced, a texture, a surface nanocrystalline layer and the like are controlled, and the strength-plasticity inversion problem of the beta titanium alloy is solved. The yield strength of the obtained titanium alloy reaches 1124 MPa, the elongation percentage is 14%, the titanium alloy has low elastic modulus and high biocompatibility and is suitable for the biomedical field, and the preparation method of the titanium alloy has reference value for improving the performance of other metal materials.

An elastic fabric and a manufacturing method therefor. TPU fibers are used as elastic fiber materials, the TPU fibers are processed into elastic yarns, and by means of structural designs of the elastic yarns and a textile, and in cooperating with textile dyeing and finishing processes for corresponding processing, the fabric having excellent elasticity and good hand feel is obtained. The warp-direction elastic elongation of a woven fabric can reach 35-70%, and the weft-direction elastic elongation thereof can reach 80-130%; the warp-direction elastic elongation of a knitted fabric can reach 180-250%, and the weft-direction elastic elongation thereof can reach 250-360%; the textile has low elastic modulus and low elastic recovery rate, and garments made from this textile deliver minimal wearing constriction; the surface of the textile can achieve a special crepe style and has excellent hand feel.

The invention discloses a high-elastic-modulus and high-ductility cement-based composite material for assembly type component joint connection and a preparation method thereof.According to the scheme, the composite material is prepared from, by mass, 500-700 parts of cement, 360-504 parts of granulated blast furnace slag, 120-168 parts of fly ash, 120-168 parts of silica fume, 323-462 parts of quartz sand and 377-539 parts of iron ore sand. The concrete is prepared from the following components in parts by weight: 176 to 246 parts of water, 14 to 18 parts of composite fiber, 5.5 to 7.5 parts of a water reducing agent, 30 to 42 parts of an expanding agent, 5 to 7 parts of a binder, 0.5 to 0.7 part of a retarder, 1 to 1.4 parts of a deflocculating agent, 0.15 to 0.21 part of a defoaming agent and 0.5 to 0.7 part of a rheological agent. Furthermore, a corresponding step-by-step stirring preparation process is matched, so that the accurate regulation and control of the material performance are effectively realized. According to the invention, the problems of poor working performance, low tensile strength, insufficient elastic modulus and the like of the traditional high-ductility concrete (ECC) in assembly type component node connection can be solved, and the strict requirements of assembly type nodes on strength, construction and deformation performance can be met.

The invention discloses a metal gel composite system for reducing elastic modulus based on chelation and a preparation method thereof. The composite system is a hydrogel system containing metal ions and a chelating agent, the chelating agent is phytic acid, and the metal ions and the phytic acid are chelated in the hydrogel to form a chelating structure, so that the elastic modulus of the hydrogel is reduced. The composite system can have the Young modulus of brain-like tissue, the Young modulus can be generally lower than 300 Pa, meanwhile, the composite system can also have excellent conductivity, and the composite system has wide application prospects in the field of bioelectronic devices.

The invention relates to the technical field of alloy materials, in particular to a design and preparation method of a high-strength low-modulus Ti-Mo-Nb-Zr-Sn biomedical titanium alloy. Beta-type medical titanium alloy with low elastic modulus is designed by adopting a method of combining a physical metallurgical model and machine learning, a titanium alloy plate is prepared through cold working deformation, and finally, the cold-rolled plate is further strengthened by adopting short-time low-temperature deformation aging treatment. The Ti-Mo-Nb-Zr-Sn alloy obtained through the method has the excellent performance of high strength and low modulus, the tensile strength Rm is not lower than 775 MPa, the elastic modulus E is not higher than 45 GPa, the highest strength-modulus ratio is 22.2 * 10 <-3 >, from the aspect of the strength-modulus ratio, on the basis of the low elastic modulus, the mechanical compatibility of the alloy is remarkably improved through deformation aging treatment, the performance requirement is met, and meanwhile the mechanical property of the alloy is improved. The stress shielding phenomenon can be effectively improved, and the material can be used as a potential medical fixing material in clinical application.

The invention relates to a display module and a display device, and the display module comprises a display panel which is located in a bending region and a non-bending region; the supporting structure is arranged on one side, in the thickness direction, of the display panel, the supporting structure comprises a first supporting layer and a second supporting layer, and the first supporting layer and the second supporting layer are adjacently arranged in the first direction; at least part of the first supporting layer is located in the bending area, and at least part of the second supporting layer is located in the non-bending area. According to the display module, at least part of the first supporting layer with high elastic modulus corresponds to the bending area, so that local reinforced support with high deformation resistance is provided for the bending area which is prone to collapse when the display module is in the unfolded state; and at least part of the second supporting layer with low elastic modulus corresponds to the non-bending area, so that a flexible buffer area easy to compress and deform is provided for the non-bending area needing to absorb material redundancy when the display module is in the bending state.

A titanium alloy plate for elastic sealing and elastic connection and a preparation method thereof belong to the technical field of metal material preparation. The present invention combines multi-stage rolling after room temperature aging, gradual stress release by multiple leveling, and construction of periodic distribution of nanodomains through a specific ratio design to achieve fine control of the material microstructure, thereby giving the titanium alloy plate a low elastic modulus and a high shear modulus. The titanium alloy plate prepared by the present invention has an elastic modulus of 70GPa~90GPa, a shear modulus of 26GPa~40GPa, and a Poisson's ratio of 0.10~0.40. The present invention has unique advantages in the systematic design of organizational control, process sequence and performance optimization, and provides a new technical path for solving the demand for materials with elasticity, strength and stability in extreme environments.

An optical fiber cable comprises at least one hollow-core fiber having a tight buffer formed around the hollow-core fiber. The tight buffer has a multi-layer construction whereby an inner layer is tightly formed around an outer surface of the hollow-core fiber and an outer layer is tightly formed around the inner layer. The inner layer is formed of a soft material having a low elastic modulus, whereas the outer layer is formed of a material having a higher elastic modulus than the inner layer.

The application discloses a high-elasticity-modulus magnetic memory alloy prepared based on a liquid die forging method and a preparation method thereof, and belongs to the technical field of magnetic memory alloy preparation. 51‑x Ni 25 Ga 24 Gd x , wherein x=0.4-0.6. The preparation method of the high-elasticity-modulus magnetic memory alloy prepared based on the liquid die forging method comprises the following steps: taking nickel powder, manganese powder, gallium powder and gadolinium powder according to atomic percentage, ball-milling and mixing, and then sequentially performing liquid die forging and pressure forming to obtain the high-elasticity-modulus magnetic memory alloy. The application adopts trace rare earth element Gd element to replace Mn element, and adopts a liquid die forging technology to prepare a high-performance magnetic memory alloy. The magnetic memory alloy has the characteristics of high elastic modulus and small brittleness, and solves the problems of large brittleness and low elastic modulus of the existing Mn2NiGa magnetic memory alloy.

The invention belongs to the field of metal material plastic forming, and particularly relates to a method for preparing a large-linear-elasticity high-strength NiTi shape memory alloy through composite plastic deformation. Comprising the following steps that (1) solid solution quenching treatment is conducted, specifically, a NiTi alloy bar containing 50 at% of Ni and 50 at% of Ti is subjected to solid solution quenching treatment; (2) rotary forging treatment is conducted, specifically, the bar obtained after solution quenching in the step (1) is subjected to room-temperature rotary forging, the deformation of each pass of rotary forging is controlled to be within 2.5%, the total deformation of rotary forging treatment is controlled to be within 20%, and the bar with fine grains of 0.5-5 micrometers is obtained; and (3) room-temperature rolling deformation is conducted, specifically, room-temperature rolling is conducted on the fine-grain bar obtained in the step (2). According to the invention, the nickel-titanium shape memory alloy with high strength, low elastic modulus and large linear elasticity can be prepared; the method is low in cost and high in repeatability, and can be used for large-scale industrial production.

A pedicle screw with a topologically optimized grid lattice structure relates to the field of orthopedic implants. The effective design part of the spinal screw is the screw rod part. The outer side of the screw rod has a variable pitch thread, and the inside of the screw rod is filled with a topologically optimized grid lattice structure, which reduces the elastic modulus while increasing its compressive strength, effectively reduces stress shielding, and promotes bone growth. In addition, the design of the topological lattice structure allows bone cement to be evenly and fully filled and distributed between the prosthesis and the bone.

The application discloses a stress fatigue resistant titanium alloy for spectacle frame structural members and a preparation method thereof, relates to the technical field of titanium alloy materials, and provides the stress fatigue resistant titanium alloy, which is composed of the following components in mass percentage: Al 5.5-6.5%, V 3.5-4.5%, Ta 0-2.5%, Mg 0.1-0.2%, O 0.06-0.12%, N 0.05-0.1%, Fe 0.02-0.24%, Re 0.15-0.5% and Rh 0.15-0.5%, and the balance is Ti and inevitable impurities. The common action of the added elements Re and Rh restrains the diffusion of Al, Ta and V, and obviously refines the alpha phase, the grain size of which is about 5-20 mu m, the strength of the primary alpha phase and the transformed beta phase is well matched (the difference is 65.76-75.87 HV), and the probability of the fatigue crack along the transformed beta phase is reduced, so that the alloy has good stress fatigue resistance. The stress fatigue resistant (alpha+beta) type dual-phase titanium alloy provided by the application has low elastic modulus, the strength can reach 1098 MPa, the fatigue life can reach 27088 times, and the alloy has good stress fatigue resistance and can be used for the connecting structural members of spectacle frames.

It provides a preparation method of solid-liquid composite casting in a specific mold to produce the heterostructured metallic bars composed of high elastic modulus metal and low elastic modulus Mg alloy. Subsequently, the microstructure of heterogeneous Mg alloys bars is adjusted by the specific deformation and heat treatment. Heterogeneous Mg alloys bars without oxide inclusions and with good interfacial bonding were prepared through this method. The improvement of elastic modulus is obtained by tailoring the heterogeneous microstructure.

The present invention generally relates to inherently wettable silicone hydrogel contact lenses having relatively high oxygen permeability, relatively high equilibrium water content and relatively low elastic modulus. The present invention is also related to a method for making such inherently wettable silicone hydrogel contact lenses.

The invention relates to a biomedical zirconium alloy with ultralow elastic modulus and a preparation method thereof. The alloy comprises the following three alloy elements in percentage by mass: 71 to 80 weight percent of Zr, 20 weight percent of Nb, 1 to 9 weight percent of Ta and the balance of inevitable impurities. In the preparation process, by regulating and controlling the Ta content and combining three-stage solid solution-aging quenching heat treatment, the beta-Zr phase is effectively stabilized, and collaborative optimization of the elastic modulus and the strength of the alloy is achieved. According to the alloy obtained through the method, along with the increase of the Ta content, the tensile strength of the alloy is in the trend that the tensile strength is firstly increased and then decreased, and the elastic modulus is firstly decreased and then increased; when the Ta content is optimal, the lowest elasticity modulus of the alloy can reach 15.2 GPa, the tensile strength peak value can reach 861 MPa, the stress shielding effect is remarkably inhibited, and the mechanical matching property with bone tissues and the long-term stability of implants are greatly improved.

The invention provides phosphorus-containing aromatic polyester and a thermosetting resin composition thereof. The structural formula of the phosphorus-containing aromatic polyester is shown as a formula I. The phosphorus-containing aromatic polyester has the properties of good solubility, low dielectric, high flame retardance, low shrinkage rate during curing, low elastic modulus at high temperature and the like; and the formula I of the # imgabs0 # is shown in the specification.

To provide an apatite-zirconium oxide composite having high mechanical strength and low elastic modulus, a restorative material, a medical device, and a method for producing a calcium phosphate-carbon atom-zirconium oxide composite.SOLUTION: A calcium phosphate-carbon atom-zirconium oxide composite comprises tricalcium phosphate, apatite represented by formula (1): Cas(PO4)t(X)u, and carbon atoms, and further comprises zirconium oxide, wherein in formula (1), X represents at least one selected from the group consisting of OH and CO3, s represents a number of 8 to 10, t represents a number of 4 to 6, and u represents a number of 1 to 2.SELECTED DRAWING: Figure 1

The invention discloses a high-strength low-elasticity-modulus titanium alloy sheet and a preparation and processing method thereof, and belongs to the technical field of titanium alloy metal processing. The alloy component is TiaZrbVcAld, a is larger than or equal to 46 and smaller than or equal to 55, b is larger than or equal to 26 and smaller than or equal to 32, c is larger than or equal to 3 and smaller than or equal to 8, d is larger than or equal to 12 and smaller than or equal to 20, and a + b + c + d = 100. The method comprises the following steps: 1, melting an alloy raw material by adopting a vacuum consumable arc melting or induction suspension melting method; 2, the obtained cast ingot is subjected to cogging forging and circulating forging; 3, the alloy forged plate is preheated and rolled at the temperature of 1000 DEG C, and a primary rolled plate is obtained; 4, preheating and rolling the primary rolled plate at 900 DEG C to obtain a secondary rolled plate; 5, the secondary rolled plate is preheated and rolled at the temperature of 900 DEG C and then rapidly cooled, and a tertiary rolled plate is obtained; step 6, trimming and descaling the third rolled plate to obtain a semi-finished product with a bright surface and without burrs; and 7, the semi-finished plate is subjected to cold rolling, and the titanium alloy sheet with the ultimate tensile strength higher than 1200 MPa and the elastic modulus lower than 70 GPa is obtained. According to the method, the thin plate with the performance characteristics of high strength and low elastic modulus can be obtained.

A display device, comprising: a display panel includes a plurality of rigid areas RA, having a first, higher elastic modulus and a malleable area SA having a second, lower elastic modulus, the malleab

The invention discloses quasi-distributed sensing using an enhanced sensing structure. A system for distributed acoustic sensing may include a distributed acoustic sensing (DAS) station that transmits a DAS signal into a DAS fiber; and an enhanced sensing array, wherein the enhanced sensing array comprises at least one sensing part. The at least one sensing component may include a DAS fiber coil forming part of a DAS fiber; and a low elastic modulus housing surrounding the DAS fiber coil.

The invention discloses a medium-entropy alloy anti-corrosion coating and a preparation method thereof, and belongs to the technical field of anti-corrosion coatings, a Zr transition layer is deposited on a magnesium alloy substrate, and the bonding strength of the medium-entropy alloy coating is improved by establishing a gentle mechanical property gradient. The prepared medium-entropy alloy coating is a solid solution of a single-phase face-centered cubic structure, has good plastic deformation capacity and is not prone to cracking or peeling off from the surface of the magnesium alloy when subjected to large external force. According to the medium-entropy alloy coating prepared through the method, the low-elasticity-modulus element combination in the medium-entropy alloy coating and a magnesium alloy matrix are higher in coordinating deformation capacity, and compared with a unit metal coating, the medium-entropy alloy coating is higher in hardness and better in corrosion resistance.

This invention relates to a breathable lithium-ion battery module structure, including fasteners, front and rear wall panels, a silicon anode lithium-ion battery, a pull rod, and a breathing plate. The silicon anode lithium-ion battery is fixed by the pull rod, fasteners, and front and rear wall panels. The breathing plate is placed between the silicon anode lithium-ion battery and the front wall panel. The breathing plate is a composite material structure, combining metal and polymer materials to achieve a structure with low elastic modulus and high elastic deformation capability. The breathing plate integrates a thermistor for monitoring temperature information at characteristic locations of the battery pack.

This invention discloses a high-precision flow field sensor and measurement method with a multi-stage flagella structure inspired by mosquito antennae. The biomimetic flow field sensor consists of a central rigid rod and two multi-stage cantilever sensors on both sides. The cantilever sensors are composed of a flexible bottom layer, a flexible top layer, and a piezoresistive flexible sensor. The central rigid rod provides fixation and support for the multi-stage cantilever sensors. The flexible bottom layer is made of a high-elastic-modulus material and mainly senses changes in airflow in the surrounding flow field, oscillating with the airflow. The flexible top layer is made of a low-elastic-modulus material and mainly enhances the sensitivity of the rigid front section to changes in airflow. The piezoresistive flexible sensors are distributed on a secondary cantilever beam composed of the flexible bottom and upper layers. The oscillation of the secondary cantilever beam causes deformation of the two layers of piezoresistive flexible sensors, thereby changing the sensor resistance value. By comprehensively evaluating the resistance change of the piezoresistive flexible sensors, information such as the flow direction, flow rate, and velocity of the airflow in the flow field can be accurately measured.

This invention discloses a high-temperature resistant, high-strength, low-elasticity, high-density cementing material, relating to the field of cementing materials technology in oil and gas development. It comprises the following components by weight: 100 parts oil well cement; 35-40 parts strength stabilizing material; 50-300 parts density regulator; 0.3-0.5 parts high-strength toughening material; 0.8-1.5 parts flexible sealant; 0.2-0.4 parts suspension stabilizer; 0.5-0.8 parts dispersant; 2-3 parts fluid loss reducing agent; and 0.8-2.0 parts retarder. The oil well cement is of grade G and grade D. The mixed oil well cement has a cement mass ratio of 8:2. The high-strength toughening material is a mixture of modified carbon fiber, modified polyether ether ketone fiber, modified polyether sulfone fiber, β-type silicon carbide whiskers and potassium hexatitanate whiskers in a mass ratio of 40-60:15-25:15-25:5-8:2-4. The flexible sealant is a mixture of high-temperature resistant modified polycarbonate and sulfonated asphalt in a mass ratio of 8:2. This mixture can achieve self-toughening of the cement stone, so that the prepared cement slurry not only has good construction performance, but also has the characteristics of high strength and low elastic modulus under high temperature conditions.