2772results about How to "Increase stress" patented technology

The invention discloses a display panel, a display apparatus and a preparation method for the display panel. The display panel comprises a substrate, an organic light emitting device, a thin film packaging layer, and a metal layer, wherein the substrate comprises a display region and a non-display region; the organic light emitting device is arranged in the display region of the substrate; the thin film packaging layer covers the organic light emitting device; the metal layer is positioned in the non-display region of the substrate; grooves are formed in the metal layer; and the grooves are filled with an organic layer. By virtue of setting the metal layer in the non-display region of the substrate, forming the grooves in the metal layer and filling the grooves with the organic layer, bending stress resistance and cutting stress resistance of an edge region are improved, so that risk of cracks on the edge is relieved, and crack expansion can be effectively prevented.

The invention relates to a method for manufacturing a self-healing silicon carbide ceramic matrix composite. The method comprises the following steps: preparing fiber preform; filtrating a pyrolytic carbon interface layer by chemical gas phase; carrying out thermal treatment on the interface layer; infiltrating silicon carbide and boron carbide substrate by chemical gas phase alternately; and depositing three silicon carbide coatings by the chemical gas phase. The method has strong designability, simple process and good repeatability. The ceramic matrix composite manufactured by the method has good high temperature resistance and oxidation resistance, has excellent mechanical performance and thermal performance, and can meet the use requirement of a sealing strip/an adjustment sheet, an interior cone and other components of a high thrust-weight ratio aeroengine.

P-type MOSFETs (PMOSFETs) are formed by encapsulating the gate with an insulator and depositing a germanium containing layer outside the sidewalls, then diffusing the germanium into the silicon-on-insulator layer or bulk silicon by annealing or by oxidizing to form graded embedded silicon-germanium source-drain and/or Extension (geSiGe-SDE). For SOI devices, the geSiGe-SDE is allowed to reach the buried insulator to maximize the stress in the channel of SOI devices, which is beneficial for ultra-thin SOI devices. Graded germanium profiles provide a method to optimize stress in order to enhance device performance. The geSiGe-SDE creates a compressive stress in the horizontal direction (parallel to the gate dielectric surface) and tensile stress in the vertical direction (normal to the gate dielectric surface) in the channel of the PMOSFET, therebyforming a structure that enhances PMOSFET performance.

The invention relates to a tester for seepage failure in a contact surface of soil and works at high stress, high hydraulic gradient, and large shear deformation, characterized in that: a confining pressure chamber is arranged on a pedestal; one end of an axial presser is connected with one end of an axial pressure rod, the other end of the axial pressure rod extends from the top of the confiningpressure chamber into the confining pressure chamber to contact with a sample cap, a permeable stone is arranged at the bottom of the sample cap, a sample is arranged below the permeable stone, and the sample is wrapped with a shrinkable tube closely; a confining pressure presser accesses from the bottom of the confining pressure chamber through pipes, and an osmotic pressure presser accesses from the bottom of the sample in the confining pressure chamber through pipes; one end of a first outlet pipe is connected with the sample cap, and the other end extends out of the confining pressure chamber; one end of a second outlet pipe is connected with the bottom of the sample from the bottom of the pedestal, and the other end is connected with a measuring cup below the pedestal. The tester canacquire accurate stress strain data of the sample with seepage stress coupling effect, and provides a theory basis for researching on the seepage stress coupling constitutive model of the contact surface of soil and works.

The invention discloses a binder and making method of modified urea-formaldehyde resin, which comprises the following steps: adopting urea-formaldehyde resin, fill, reinforcer, deoxidation agent, formaldehyde catching agent, anti-aging agent, anti-shrinking agent, hardener and auxiliary reinforcer; adopting modified copolymer of acrylic acid, sodium acrylate, N, N-dimethylamino propyl methyl acrylamide as anti-shrinking agent; making polyacrylamide solution reacted by acrylamide and ammonium persulphate as formaldehyde catching agent; allocating each component according to proportion; blending evenly; casting; extracting into vacuum; stripping; stewing; drying naturally; coating a layer of polymethacrylate paint on the surface of product; proceeding colorful paint; obtaining the product.

The harmonic wave gear driver with two-arc teeth profile comprises wave generator, flexible wheel and rigid wheel. The wave generator is in form of elliptic cam, the flexible wheel and the rigid wheel has a two-arc teeth profile respectively which can realize conjugation motion. The driver can effectively improve the stress condition of the flexible wheel tooth-root and drive quality and increase load-bearing ability and torque rigidity of harmonic wave driver, and further lower minimum drive ratio of harmonic wave driver. Advantages: good processing property.

The present invention is sealing, damping and silencing material comprising metal sheet and coating. The coating consists of rubber, stuffing and compound ingredient. The compound ingredient includes sulfur, zinc oxide, stabilizer, etc.; the rubber is one or two selected from fluororubber, NBR, SBR, etc.; and the stuffing may be graphite, carbon black, kaolin, etc. The sealing, damping and silencing material may be machined into sealing washer in required shape, can resist the corrosion of various gas and liquid medium, operate in the temperature up to 400 deg.c and pressure up to 120 kg/sq cm, and possesses reliable sealing.

The invention relates to a crack-controlling method of metal parts by laser melting formation in laser material processing domain, which comprises closed-loop control of fused bath temperature, which comprises the two specific steps of exerting closed-loop feedback control on fused bath temperature by using optical imaging system and PID control device with calorific radiation transmitted from melting zone and adjusting horsepower of laser, and introduction of ultrasonic vibration, which comprises the specific steps of introducing ultrasonic vibration under the piece of work when forming by laser melting. The invention can deduce residual stress and crack, improve structure and can be used in multiple relative domains such as forming, manding and surface peening by laser melting.

The invention relates to a device for improving the spacial distribution of output beams of multimode fibers. The invention adopts the principle that single-point or multipoint or continuous distributed external stress is exerted on a short length of multimode fibers for transmitting laser to change the transmission mode distribution of light in the multimode fibers, thereby the spacial distribution of beams output form end planes of fibers can be changed. The device is especially suitable for semiconductor laser devices output by fiber coupling. After packaging is completed, the spacial distribution of output beams is improved according to specific use requirement. The device has the advantages of simple use, rapidness and good applicability.

The invention discloses a high-pressure gas injection hole-drilling pressure-releasing outburst prevention method which comprises the steps of: firstly, carrying out common drilling operation in a bottom plate stone drift (2) of a coal bed (1) in front of a coal mining or driving face; after a drill hole (3) enters a design depth of the coal bed, drawing back a drill, sending a jet nozzle (4) anda high-pressure drill rod (5) connected with the jet nozzle into the drill hole, and connecting a high-pressure gas-storing device (6) connected with the tail of the high-pressure drill rod (5) with a high-pressure gas compressing device (7) through a high-pressure tube; starting the high-pressure gas compressing device (7), carrying out near cylinder rotary impacting, cutting and holing on the hole wall of the drill hole in the coal bed (1) by using high-pressure impact wave as a power source through the jet nozzle (4) capable of jetting high-pressure airflow and automatically rotating to ensure that the coal body around the drill hole (3) is gradually crushed and separated from the hole wall to form pressure releasing space and subjected to the pressure balanced permeability increase through ground pressure and gas pressure action. According to the invention, the drainage efficiency of the gas in the coal bed is greatly improved and the outburst damage of the coal bed is reduced.

The application discloses a flexible screen and an electronic device. The flexible screen includes a body portion and a protruding portion integrated to each other; the body portion includes a first fixing region, a folding region and a second fixing region; the folding region is connected between the first fixing region and the second fixing region; the folding region may deform such that the first fixing region and the second fixing region are folded or unfolded relatively; the protruding portion is raised from the non-display side of the folding region. When the flexible screen is applied to the electronic device, the electronic device can prevent the flexible screen from arching in a direction far away from the bottom wall of a housing.

The invention provides a Cu-Ni-Sn-P alloy sheet satisfying the resistance property of stress relaxation in the direction perpendicular to the rolling direction and excellent in the other necessary properties as terminals and connectors. The invention relates to analloy sheet having a specific composition, which is made to contain specific atomic clusters containing at least any of an Ni atom or a P atom, as detected with a three-dimensional atom probe field ion microscope, in a specific density, by increasing the reduction ratio in the final cold rolling and by intentionally shortening the time for the rolling and the time to be taken before the final annealing at low temperature, and of which the necessary properties as a terminal or connector 3 are improved in that the resistance property of stress relaxation thereof in the direction perpendicular to the rolling direction is enhanced and the difference (anisotropy) in the resistance property of stress relaxation thereof between the parallel direction and the perpendicular direction to the rolling direction is reduced.

A laser and double-electric-arc double-faced composite welding method for a T-type joint relates to a welding method for laser and electric arc composite welding, and particularly relates to applying the laser and the double-electric-arc double-faced composite welding to a workpiece with a T-type joint to be welded. The invention aims to solve the problems that the single laser penetration welding has strict requirement to the seam fit-up gap and smaller fusion diameter of the faying surface, which results in low shear strength of the seam; and the laser wire filling welding or the double-beam laser synchronous welding process has strict requirement and high cost in the prior T-type joint welding. The laser beams are vertically incident for penetration welding from the top surface of a top plate along the seam formed by the contact of a vertical slab and the top plate of the T-type joint, at the same time, a first electric arc welding gun and a second electric arc welding gun carry out synchronous welding from the two sides of the seam, and the first electric arc welding gun and the second electric arc welding gun are remained to be arranged symmetrically on the left and the right sides of the vertical slab. Compared with the single laser welding, the composite welding method of the invention has the advantages that the capacity usage ratio is improved by more than 30%, the welding speed is increased by more than twice, and the welding efficiency is improved by two to three times.

A semiconductor device structure, includes a PMOS device and an NMOS device disposed on a substrate the PMOS device including a compressive layer stressing an active region of the PMOS device, the NMOS device including a tensile layer stressing an active region of the NMOS device, wherein the compressive layer includes a first dielectric material, the tensile layer includes a second dielectric material, and the PMOS and NMOS devices are FinFET devices.

The invention provides a double-sided tape for shading and reflection. The double-sided tape comprises a substrate layer, a first adhesive layer and a second adhesive layer, wherein the first adhesive layer and the second adhesive layer are respectively arranged on two surfaces of the substrate layer, any of the two surfaces of the substrate layer is provided with a white PET film of a black ink layer, the Hunter whiteness of the PET film is 80.0 to 85.0%, and the thickness of the PET film is 12 to 15 mu m. The invention further provides a preparation method for the double-sided tape for shading and reflection. The double-sided tape for shading and reflection has light reflectivity and light shielding performance, can meet a variety of performance requirements due to upsizing and thinning of mobile equipment and has excellent insulating properties, resistance to reflex action and stress relaxation performance.

The invention relates to the field of intelligent magnetic materials and in particular relates to a graphene @Fe3O4 compound water base magnetorheological fluid and a preparation method thereof, solving the problems that existing magnetorheological fluids are easy to settle and the stability and magnetorheological effects of the magnetorheological fluids are difficult to optimize at the same time. The preparation method comprises the following steps: preparing a Fe3O4 water base magnetic fluid with FeCl2.4H2O and FeCl3.6H2O; sequentially adding concentrated sulfuric acid, potassium permanganate and hydrogen peroxide to natural flake graphite and sodium nitrate to prepare graphite oxide; and then carrying out ultrasonic dispersion on home-made graphite oxide to prepare graphene oxide, finally adding a surfactant, the Fe3O4 water base magnetic fluid and a reducing agent to graphene oxide, washing the solution with deionized water until the solution is neutral, and then dispersing graphene @Fe3O4 compound magnetic particles in the deionized water to undergo ultrasonic dispersion, removing the precipitates and taking the supernatant, namely the stable graphene @Fe3O4 compound water base magnetorheological fluid, wherein the magnetic particles are graphene @Fe3O4 and account for 5-35wt% of the whole. The method has the advantages of good stability, low zero field viscosity, high shear strain and wide operating temperature range.

The invention discloses a flat non-lead packaging part and a production method thereof. The flat non-lead packaging part comprises a lead frame carrier, wherein the carrier is adhered with an IC chip. The front side of the lead frame carrier is provided with pits. The periphery of the front side of the lead frame carrier is provided with two circles of waterproof grooves. The back side of the lead frame carrier is provided two circles of anti-overflow grooves. The production method comprises the processes of washer thinning and slicing, core loading, press welding, plastic package, plating, printing and cutting and coiling. The method strengthens the bonding forces between the adhesive and the lead frame carrier and the IC chip and eliminates and reduces the rate of a lamination defect generated on the surface of the IC chip. The two circles of waterproof grooves are provided on the periphery of the carrier, the plastic packaging materials are embedded in the grooves so as to prevent moisture from entering the chip. The two circles of anti-overflow grooves arranged on the edge of the carrier have functions of preventing the lamination defect, moisture and material overflow. The method has the advantages of high rate of finished product, good reliability and convenient use, and effectively improves the reliability and excellent packaging rate of products.

A weld with trailing rotation extruding to control residual stresses deformation device relates to a device for controlling the residual stress deformation of a thin-walled metal. The weld with trailing impact rolling to control residual stresses deformation device has the disadvantages that the device has a loud noise during operation and a bad working environment and that the device is easily influenced by the impact rolling wheel and the size of the welding torch and that the distance between the wheel and the torch can not satisfy the theoretical ideal value. The upper end of a compression rod (2) is inserted into the part of the head of an electric hammer (14), which is fastened on a No.2 support (15). A pair of sliders (6) which mate with two guide rails (7) and a nut (8) which mates with an elevating screw (10) are fixed on the other side of the bottom plate (12). Both ends of the guide rail (7) are fixedly arranged on a support (5). The two guide rails (7) are parallel with the elevating screw (10), both ends of which are equipped with bearings (13). The support (5) is fixed on a base (12). The present invention with an adjustable frequency impact force can effectively prevent a welding hot cracking as well as control a straight weld and an enclosed circumferential weld.

The invention provides a tooth cosmetic veneering method, which comprises the following steps that: spinels are adopted for porcelain laminate veneering, wherein the veneer thickness can be controlled between 0.5 and 0.8; tooth surfaces are free from being processed, so that painless cosmetology is realized; temporary teeth are free from being worn, so that inconvenience of a person being subject to cosmetology can be reduced; and the tongue side parts of teeth are free from being processed, so that jaw teeth can be effectively protected, and 'foreign body feeling' is free. In the invention, a compound material prepared by a special glass permeation method is adopted, the strength can reach over 400 Mpa after bonding, the durability of the prepared spinel porcelain laminate tooth veneer can reach over 10 years; the prepared spinel porcelain laminate tooth veneer has the optical speciality being the same as that of natural tooth tissues, and has a simulation cosmetic effect; the material has good mechanical and physical properties so as to bear high stress, high acid corrosion resistance, and low heat conduction property so that the tooth body can not be irritated by heating, and no stimulation is caused to teeth pulp when people eat cold and hot food; the material has a self-cleaning capability, so that bacteria are difficult to grow; the X-ray transmission property is good; and the cost is low.

The invention discloses a preparation method of a carbon fiber reinforced carbon-silicon carbide dual-ceramic based gradient composite material. The preparation method is characterized by comprising the following steps: (a), carrying out thermal treatment onto the fibers by adopting different temperatures; (b), dipping the fibers which are not subjected to thermal treatment and the thermally-treated fibers obtained in the step (a) in resin glue liquor, drying, continuously superposing and laying up, applying a certain pressure after laying up, and carrying out curing and post-curing treatment in sequence to prepare a composite material biscuit body with fiber/base body interface adhesive strength in gradient change; (c), carrying out high-temperature pyrolysis onto the composite material biscuit body obtained in the step (b) to obtain a carbon/carbon porous body with porosity in gradient change; (d), carrying out liquid silicon permeation onto the carbon/carbon porous body obtained in the step (c) under a high temperature to obtain the C/C-SiC composite material with SiC ceramic base body content in gradient change. The preparation method disclosed by the invention is simple in process, short in preparation period, low in cost and capable of preparing a large workpiece with a complex shape.