643results about How to "Eliminate cracks" patented technology

The present invention relates to a process and system for gasifying biomass or other carbonaceous feedstocks in an indirectly heated gasifier and provides a method for the elimination of condensable organic materials (tars) from the resulting product gas with an integrated tar removal step. More specifically, this tar removal step utilizes the circulating heat carrier to crack the organics and produce additional product gas. As a benefit of the above process, and because the heat carrier circulates through alternating steam and oxidizing zones in the process, deactivation of the cracking reactions is eliminated.

A disclosed method provides techniques for forming low-cost, mechanically strong, highly electronically conductive porous structures for solid-state electrochemical devices. In particular, a method of forming a ceramic film on a substrate using electrophoretic deposition (EPD) is described. The method employs a colloidal dispersion of particles during the EPD process where a distribution of particle sizes is selected to eliminate drying cracks in the ceramic film prior to firing of the ceramic film-coated substrate. The method may be used to provide a high-density green film which can be sintered on to a non-shrinking substrate. For instance, a thin film of YSZ with a high green density may be sintered on to a non-shrinking LSM substrate. In particular embodiments, the distribution of particle sizes used in the EPD process may be selected to reduce a firing temperature and a firing time during sintering of the film coated substrate.

A method of combined intercropping and mulching of commercial crops is described herein. Suitable annuals such as young wheat and/or buckwheat plants are planted in soil in which legumes were originally planted. A portion of the resulting upper portions of young wheat and/or buckwheat plants is mowed and blended with organic debris to provide nutrients for intercropped commercial plants such as corn and soybeans. The remaining portion is chopped blended with organic debris and sprayed onto the top layer of seeded soil as combination mulch. For larger commercial applications, conventional agricultural machines are described herein, and are modified for the most efficient intercropping. For best results, at least one intercropped commercial plant should be a legume.

The present invention provides a positive electrode active material containing a composite oxide having a composition represented by a structural formula (1) given below:

Li_x(Ni_1-yMe1_y)(O_2-zX_z)+A  (1)

The invention relates to laser melting-covering nickel base nanometer WC/Co precoating manufacturing method. It includes the following steps: weighting lac absolute ethyl alcohol in proportion of 1:10-20; adding the lac into the absolute ethyl alcohol; weighting and mixing nickel base nanometer WC/Co powder and bonding agent in proportion of 1g: 0.1mL-0.25mL; fully stirring to form precoat agent; coating the precoat agent at the workpiece surface to form precoating; drying. The prepared nickel base nanometer WC/Co precoating is adopted laser melting-covering technique to form nickel base nanometer WC/Co composite coating.

A silicone coating composition comprising (A) a silicone resin resulting from (co)hydrolytic condensation of an alkoxysilane or a partial hydrolytic condensate thereof, (B) an aromatic-free compound for curing the silicone resin, and (C) a solvent remains stable during shelf storage. It is applied and heat cured to a plastic substrate to form a protective coat having a high hardness, mar resistance, adhesion, toughness and crack resistance.

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.

A semiconductor package with a support structure and a fabrication method thereof are provided. With a chip being electrically connected to electrical contacts formed on a carrier, a molding process is performed. A plurality of recessed portions formed on the carrier are filled with an encapsulant for encapsulating the chip during the molding process. After the carrier is removed, the part of the encapsulant filling the recessed portions forms outwardly protruded portions on a surface of the encapsulant, such that the semiconductor package can be attached to an external device via the protruded portions.

The invention relates to a linear low-density polyethylene composition comprising components of, by weight: 50-98 parts of linear low-density polyethylene with a density of 0.918-0.922g/cm<3> and a melt flow index of 0.1-10g/10min, 0.5-45 parts of low-density polyethylene with a density of 0.910-0.925g/cm<3> and a melt flow index of 0.1-30g/10min, 0.5-45 parts of high-density polyethylene with a density of 0.941-0.970g/cm<3> and a melt flow index of 0.5-10g/10min, 0.5-45 parts of polypropylene with a density of 0.830-0.910g/cm<3> and a melt flow index of 0.5-50g/10min, 0.1-20 parts of an ethylene-vinyl acetate copolymer with a density of 0.926-0.939g/cm<3>, 0.01-1 part of a rheology modifying agent, and 0.5-20 parts of a compatibilizing agent with a melt flow index of 0.5-50g/10min. With the composition, extrusion processing performance can be effectively improved, a melt fracture phenomenon can be eliminated, and the compatibility can be improved. With the composition, the strength, flexibility and aging resistance of a product can be improved. The composition can be used for producing films, drip irrigation tapes, and pipes with various specifications.

The invention is mainly applied in the retreatment field of the grown silicon carbide crystals. The annealing process specifically comprises the following steps: heating for 10-50 hours to an annealing temperature in an annealing furnace with good tightness and small temperature gradient (the temperature gradient of the surrounding of the crystals is 1-20 DEG C/cm) under the protection of an inert gas with the pressure of more than 10000Pa, keeping the temperature for 10-40 hours, and reducing the temperature for 10-50 hours, wherein the annealing temperature is 2100-2500 DEG C. Through the double annealing, the stress between the crystals and the crucible cover and the internal stress of the silicon carbide crystals are reduced, thus the breakage rate of the silicon carbide crystals is reduced in the subsequent processing step and the yield of the silicon carbide crystals is increased.

The invention relates to a cable material and discloses a low-temperature resistant and oil resistant low-smoke halogen-free flame retardant polyolefin cable material and a preparation method thereof. The prescription of the cable material consists of MLLDPE (metallocene polyethylene), POE (polyolefin elastomer), interfacial compatibilizer, aluminium hydroxide, antioxygen and lubricant. The preparation method comprises the following steps: extruding and pelleting MLLDPE and POE base materials, interfacial compatibilizer, aluminium hydroxide, antioxygen and lubricant in a temperature zone at 110-160 DEG C via a double screw, and then packaging to instantly obtain a low-temperature resistant and oil resistant low-smoke halogen-free flame retardant polyolefin cable material finished product. Compared with the common low-smoke halogen-free flame retardant polyolefin cable material, the material provided by the invention has the advantages that the oil-resistant property is enhanced, the low-temperature resistant property of the product is greatly enhanced and the cracking problem of the low-smoke halogen-free flame retardant polyolefin cable material under low temperature is eliminated.

The invention relates to an inside-laser coaxial powder feeding laser impacting and forging composite machining forming device and method. The device comprises a master controller, a pulse laser device, a continuous laser device, a temperature inductor, a coaxial powder feeding device, a visual tracking system, a workbench, a mechanical arm, a metal powder container and a gas container. The pulse laser device, the continuous laser device, the temperature inductor and the visual tracking system are all arranged above the workbench. The mechanical arm tightly clamps the coaxial powder feeding device, so that the coaxial powder feeding device is located between the continuous laser device and the workbench, and is coaxial with the continuous laser device. The coaxial powder feeding device communicates with the metal powder container and the gas container. The pulse laser device, the continuous laser device, the temperature inductor, the visual tracking system, the mechanical arm, the metal powder container and the gas container are all connected with the master controller. The inside-laser coaxial powder feeding laser impacting and forging composite machining forming device and method can solve the problems of insufficient fusion and incomplete fusion of the Gaussian light spot edges, inner defects of gas holes, incomplete fusion, cracks and shrinkage are effectively eliminated, and the inner stress state of a formed part is greatly improved.

A multi-layer steel cylinder head gasket includes a spacer layer between two beaded mirror image outer layers. A wire ring stopper extends about the boundary of a combustion opening in the stopper layer; the ring is radially spaced from the mirror image beaded outer layer extremities. The ring is covered by a flange folded thereover; the flange extends radially outwardly to overlie the boundary edge of the stopper layer at the combustion opening. The stopper ring pre-stresses the gasket interface at the combustion opening upon securement of a cylinder head to an engine block. Because the stopper ring is spaced from the beaded outer layers, the stresses imposed on the wire ring are decoupled from the beaded outer layers, and lower incidences of bead cracking are realized. In addition, the wire ring diameter is greater than the thickness of the stopper layer, reducing unnecessary compression loads on the stopper layer.

The invention provides a cantilever bay window board concrete overall pouring structure and a construction method of the cantilever bay window board concrete overall pouring structure. An upper bay window board is formed together with an above-window coupling beam and an upper layer floor through concrete overall pouring, and the inner end of an upper bay window board reinforcing steel bar of the upper bay window board extends into the above-window coupling beam to be anchored. A lower bay window board is formed together with the upper portion of a below-window coupling beam through concrete overall pouring, and the inner end of a lower bay window board reinforcing steel bar of the lower bay window board extends into the below-window coupling beam to be anchored. According to the cantilever bay window board concrete overall pouring structure and the construction method, the positions of the bay window boards are reserved in the construction process of a concrete wall, the upper bay window board and the above-window coupling beam are simultaneously formed together with the upper layer floor through pouring, the lower bay window board and the upper portion of the below-window coupling beam are simultaneously formed through pouring, the integrity is good, cracks of the root portions of the bay window boards are effectively eliminated, leakage and potential safety hazards caused by the cracks are effectively eliminated, later-period maintenance and processing expenses of a bay window are reduced, and the cantilever bay window board concrete overall pouring structure and the construction method can be widely applied to non-floor type bay window construction of a cast-in-place concrete shear wall structure house.

The invention provides a sand mixing process for molding clay green sand. The process comprises the following steps of: (1) proportioning the following materials in parts by weight: 97-100 parts of old sand, 0-3 parts of fresh sand, 0.8-1.2 parts of bentonite, and 0.2-0.6 part of pulverized coal; (2) orderly putting the proportioned materials into a sand mixer for mixing for 8-20 seconds in a drying manner; and then adding wet sand which is 0.8-2% of total mass of the sand for mixing for 80-130 seconds; and (3) detecting the mixed casting sand, wherein the casting sand accords with the following indexes: the compaction rate/moisture is 10.0-11.5; the effective bentonite/moisture is 2.1-2.5; the 140-mesh retention amount is 6.0-9.0%; and the content of triple-screen which is less than 200 meshes is 2.8-3.5%. By adopting the sand mixing process, the combination property of the casting sand is ensured; and the purposes of improving the drawing quality, reducing sand shakeout of a casting and the blowhole rejection rate, delaying and removing cracks of a sand mold, and the like are achieved.

The invention discloses a method for preparing a silicon carbide ceramic impeller through gel casting and pressureless sintering, and provides a preparation method of a pressureless sintered silicon carbide ceramic impeller with a complex and accurate shape characteristic and an external diameter size capable of reaching over 160 mm. A silicon carbide solid-phase sintering formula system of a boron-containing sintering auxiliary agent and a gel casting and pressureless sintering process are adopted; and the method comprises eight steps of: preparing ceramic slurry; performing injection molding; demolding; drying; machining; degumming; performing pressureless sintering; and machining. According to the method, the technical problems of non-uniform mixing of large-scale ceramic slurry in gel casting, dryness, crack and deformation in a pressureless sintering process and the like are solved, and finally, preparation of the pressureless sintered silicon carbide ceramic impeller is realized. The impeller has good performance such as corrosion resistance, wear resistance, high temperature resistance and the like, and can be widely applied to a centrifugal pump for corrosive liquid conveying of various industries.

The invention relates to a molten preparation method of ultrahigh molecular weight polyethylene fiber, and the molten preparation method is characterized by comprising the following steps: a. ultrahigh molecular weight polyethylene, internal modifier organic nano phosphate, and an antioxidant are fully mixed in a high speed mixer, then are added into a twin screw extruder for mixing and granulating to obtain modified masterbatch, the screw the temperature is 150 to 250 DEG C; b. the modified masterbatch, the ultra high molecular weight polyethylene and an external modifier fluorine elastomer are fully mixed in a high-speed mixer, then added into the twin screw extruder for melt spinning, and are cooled in water bath to obtain nascent fiber, the screw segment temperature is 150 to 260 DEG C, the water bath temperature is 5-20 DEG C; and c. the nascent fiber is processed by 3-stage stretching at 80 to 150 DEG C, and the total stretching ratio is 10-20 times.

A memorial for deceased humans or animals in which the cremated residue or ash is blended or mixed with particulate glass, the mixture being heated to form a liquid pool of glass with the cremation residue or ash dispersed, infused and/or absorbed therein, the molten glass and ash being removed from the heat source after a suitable time period and transferred to a mold in the shape of the memorial, the mold allowed to cool until the memorial sets, the memorial then removed from the mold and reheated in an annealing oven at a suitable temperature for a suitable time so as to eliminate possible cracking and scoring, the memorial once removed from the annealing oven can be further cut, polished, faceted, engraved or the like. The initial mixture of particulate glass and cremation residue and ash can be further combined with a coloring agent if so desired before heating or before transfer to the memorial mold.

The invention relates to a separation joint structure, comprising polystyrene plate located at the lower part and elaterite sand located at the upper part. Waterproof coiled material is covered above the elaterite sand and sealing material is coated between waterproof coiled material and fine stone concrete. In construction, according to the position of presetting separation joint wire is snapped. Plain cement puddle with 3%-5% of waterproof powder is used to mount the strip of polystyrene plate. When it is used on the ground the width of it is 10-20mm and when it is used on the roof surface. The thickness of strip is equal to the thickness of fine stone concrete. After the strip of polystyrene plate is mounted for 24 hours fine stone concrete is poured. After fine stone concrete is maintained for 7-10 days 20mm of the upper part in plate joint is shoveled by flat spade. Elaterite sand is mounted; then waterproof coiled material is pasted on tar sand; and then sealing material is coated between waterproof coiled material and fine stone concrete. The invention can eliminate cracks on the ground or on the roof surface generated by expand on heating and contract on cooling of fine stone concrete and decrease damage to the component. The purpose that the separation joint can not be cracked is achieved.

The invention discloses a construction method for high-altitude section prefabricating, beam moving, beam storing and assembling of a large concrete box beam, which is characterized by comprising the following steps: 1) erecting a high-pile prefabricated platform; 2) erecting beam moving steel tube supports and steel slide rails between the high-pile prefabricated platform and a pier; 3) pouring a matched beam section on the high-pile prefabricated platform; 4) using the poured matched beam section as the end die at one end of the next new beam section to be poured and pouring the new beam section; 5) after pouring the new beam section, transporting the matched beam section to the design position as the beam section to be assembled and simultaneously moving the new beam section forward as the next matched beam section; 6) longitudinally moving the beam section to be assembled to the matching surface of the end of the assembled beam section as the beam section to be assembled and adjusting the position of the beam section to be assembled to ensure the beam section to be assembled to conform to the requirement of split joint with the assembled beam section on the pier; and 7) carrying out split joint on the beam section to be assembled and the assembled beam section. By section prefabricating and long-time beam storing of the beam sections, the construction method effectively ensures the prefabricated beam sections to complete most contraction deformation of the beam body in free state and eliminates the contraction difference of the adjacent beam sections caused by different ages, thus eliminating cracks.

The invention provides a display substrate, a preparation method thereof, and a display device. The display substrate comprises a display area and a non-display area. The non-display area comprises afunctional layer, a retaining wall arranged on the functional layer, and an inorganic packaging layer covering the functional layer and the retaining wall. Between the display area and the retaining wall, the functional layer comprises a plurality of grooves arranged at intervals, so that a concave-convex structure is formed on the contact surface of the functional layer and the inorganic packaging layer. According to the invention, the plurality of grooves are formed in the area between the display area and the retaining wall at intervals, so a concave-convex structure is formed on the contact surface of the functional layer and the inorganic packaging layer, thereby increasing the bonding force of the film layer in the area, avoiding the delamination or cracking of an area between the display area and the retaining wall, avoiding a water and oxygen invasion path formed by delamination or cracking, and effectively guaranteeing the effectiveness and reliability of packaging. Moreover,the display substrate is low in manufacturing cost, is easy in process implementation and the like.

The invention provides a method and device for conducting laser cladding with the assistance of electromagnetic stirring in a forced cooling environment. The device comprises a fiber laser, a liquid nitrogen forced cooling platform, an electromagnetic stirring platform, a temperature detection and feedback system and a computer control system. The method comprises the steps that a sample is placed on a special clamp made of red copper, the red copper clamp is forcibly cooled through liquid nitrogen, then cold is indirectly transmitted to the sample, and thus forced cooling of the sample in the laser cladding process is achieved. Meanwhile, the magnetic field intensity of the electromagnetic stirring platform is adjusted and controlled through a computer, and thus the laser cladding process with the assistance of electromagnetic stirring under forced cooling is achieved. According to the method and device for conducting laser cladding with the assistance of electromagnetic stirring in the forced cooling environment, laser cladding is conducted with the assistance of forced cooling and electromagnetic stirring to prepare a composite coating so that the good metallurgical bonding capacity of the composite coating with a matrix can be remarkably improved, a hard phase and uniform tissue distribution in the clad coating are achieved, grains are refined, and stress concentration is avoided; and defects such as cracks and pores of the laser clad coating are eliminated, and the quality of the clad coating is improved.