11results about How to "Increased anisotropy" patented technology

The invention relates to the technical field of alloy preparation, particularly provides a 650 DEG C high temperature resistant titanium-based composite material plate, and further provides a preparation method of the plate. The titanium-based composite material plate resistant to the high temperature of 650 DEG C, provided by the invention, is prepared from the following chemical components in percentage by mass: 6.0 percent to 7.0 percent of Al, 1.0 percent to 3.0 percent of Zr, 0.5 percent to 2.0 percent of Mo, 0.4 percent to 1.0 percent of Nb, 0.4 percent to 1.0 percent of W, 0.1 percent to 0.4 percent of Si, 0.4 percent to 0.7 percent of B, 0.01 percent to 0.10 percent of C and the balance of Ti and inevitable impurities. According to the titanium-based composite material component system provided by the invention, a vanadium element which is easy to generate interface reaction at high temperature is abandoned, and refractory metal elements such as niobium and tungsten are adopted to cooperate with a ceramic reinforced phase formed by boron, carbon and the like, so that the high-temperature performance and the thermal stability of the material are improved; meanwhile, by controlling the content of molybdenum, aluminum and other elements within a specific interval, the hot working performance of the material is remarkably improved while high strength is maintained, and the contradiction between insufficient high-temperature performance and poor hot working performance of a traditional titanium-based composite material is effectively solved.

The invention provides a low-cost and low-anisotropy titanium alloy thin plate and a preparation method thereof. The method comprises the steps that a titanium alloy plate blank is prepared through multi-fire forging, and surface treatment and coating are sequentially conducted on the titanium alloy plate blank; heating to 50-100 DEG C above the phase transformation point, keeping the temperature, and carrying out rough rolling and coiling; after uncoiling and flattening, width cutting and blanking are carried out in the direction perpendicular to the rough rolling direction; heating to 30-50 DEG C above the phase transformation point, preserving heat, immediately discharging and water-cooling, and then performing alkali-pickling for the first time; reversing rolling and multi-heating-number rolling until the thickness of a hot semi-finished product is reached; after annealing and second-time alkali and acid pickling, multi-rolling-process cold rolling is conducted to the target thickness, and intermediate annealing is conducted between every two adjacent rolling processes; performing recrystallization annealing treatment; edge cutting and head and tail cutting are conducted, and a bell-type furnace is adopted for pressing and straightening; and carrying out third alkali-pickling to obtain the titanium alloy sheet. According to the method, rolling, homogenization treatment, reversing rolling and multi-rolling-process cold rolling are combined, and the technical problem that in titanium alloy sheet preparation, structure performance and cost control cannot be considered at the same time is solved.

The invention belongs to the technical field of magnesium alloy processing, and relates to a circulating cryogenic-annealing treatment method for reducing anisotropy of a magnesium alloy profile. Providing an extruded magnesium alloy profile formed by extrusion; the extrusion-state magnesium alloy profile is subjected to at least three times of cryogenic-annealing treatment, and each cryogenic-annealing treatment process comprises the following steps: firstly, the extrusion-state magnesium alloy profile is placed in an environment with the temperature of-200 DEG C to-190 DEG C for cryogenic treatment; and then the magnesium alloy profile subjected to subzero treatment is heated to 400-450 DEG C for annealing treatment. According to the method provided by the invention, the magnesium alloy extruded profile tends to be isotropic, the room-temperature ductility of the magnesium alloy extruded profile is improved, and a solid foundation is laid for application of the magnesium alloy extruded profile in more fields with strict requirements on performance uniformity. According to the method, the stability of the process is easily realized, the treatment period is relatively short, and the requirements of the market on products can be met more quickly.

The utility model discloses a point diffusion out-of-focus multi-effect lens, and relates to the technical field of vision prevention and control lenses. The point diffusion out-of-focus multi-effect lens is provided with the central optical area, the out-of-focus area and the light diffusion area, the out-of-focus area is located on the periphery of the central optical area, the light diffusion area comprises the diffusion point array to change light scattering so as to adjust the contrast ratio, the point diffusion area is matched with the out-of-focus area, and the vision delay effect is better; meanwhile, a plurality of out-of-focus rings are arranged to construct a plurality of out-of-focus areas, a microstructure array of the out-of-focus areas is arranged in a radial array mode, a structure with dense middle out-of-focus structures and sparse out-of-focus structures is formed, the physiological structure of human eyes is met, vision impediment is reduced, and the astigmatism problem of a wearer is solved; moreover, the out-of-focus zones in the adjacent out-of-focus annular zones are staggered in the circumferential direction, and the intervals between the out-of-focus zones in the adjacent out-of-focus annular zones are also staggered in the circumferential direction, so that the anisotropy of the out-of-focus zones is increased, the adaptation of a visual receptor is reduced, and the tolerance phenomenon is delayed.

This invention provides a method for metal interconnection of flexible circuits, comprising the following steps: coating a first dielectric layer; depositing a first metal layer and photolithographically etching a first metal pattern; coating a second dielectric layer and photolithographically etching interlayer vias; depositing a second metal layer and photolithographically etching a second metal pattern, wherein the second metal pattern overlaps with the first metal pattern; coating a third dielectric layer and photolithographically etching contact windows; and fabricating metal contacts. The beneficial effects of this invention are that the overlapping of the upper and lower metal layer patterns improves the reliability of vertical interconnection between metal layers, reduces lateral etching, improves etching accuracy, effectively avoids open circuits in flexible circuits, enhances the interconnection quality of flexible circuits, improves the fracture resistance of fine lines in flexible circuits, facilitates high-density wiring in flexible circuits, constructs thick electrical contact points, reduces contact resistance, improves signal transmission quality, and enhances the mechanical strength and wear resistance of the contacts.

The invention discloses a method for regulating and controlling anisotropy of a 2195 aluminum-lithium alloy based on an in-situ precipitated icosahedral quasicrystal phase, belongs to the technical field of regulation and control of anisotropy of the 2195 aluminum-lithium alloy, and aims to solve the problem of anisotropy of mechanical properties of the 2195 aluminum-lithium alloy. The method comprises the following steps: carrying out solution treatment on a 2195 aluminum-lithium alloy blank; preheating the blank subjected to solid solution treatment, and spraying a lubricant on the surface of the blank; the preheated blank is heated to the deformation temperature, and heat preservation is conducted; and the blank obtained after heat preservation is subjected to multi-direction forging, and the final deformation of the blank reaches the nominal accumulated strain. An icosahedral quasicrystal T2 phase is precipitated in situ in the multidirectional forging process, the average diameter of the phase is 52-71 nm, dislocation coplanar slippage is inhibited through an Orowan bypassing mechanism, and therefore the anisotropy of the alloy is reduced. The method can be used for improving the mechanical property anisotropy of the 2195 aluminum-lithium alloy, and theoretical guidance is provided for manufacturing weak-anisotropy 2195 aluminum-lithium alloy components.

According to the high-strength and high-plasticity FeNiAl eutectic high-entropy alloy and the preparation method thereof, through the collaborative design of B microalloying, homogenization, cross cold rolling deformation and medium-temperature heat treatment optimization, a fine and uniform eutectic lamellar structure and a high-density dislocation structure are formed in a plate, the brittleness brought by an as-cast coarse structure is effectively relieved, and the high-strength and high-plasticity FeNiAl eutectic high-entropy alloy is obtained. The tensile strength and the yield strength are remarkably improved, meanwhile, high ductility and fracture resistance are kept, and the performance anisotropy caused by the rolled texture is further weakened. The technological process is simple, parameters are easy to control, and the method is suitable for industrial amplification application and is suitable for high-temperature structural parts, molds, impact load components and other scenes with high requirements for comprehensive mechanical properties of materials.

The invention discloses a preparation method of a high-performance permanent magnetic ferrite material and a product thereof, and belongs to the technical field of oxide magnetic materials, the high-performance permanent magnetic ferrite material comprises ferrite particles SrxCayLa1-x-yFen CozRmO19 with hexagonal crystal structures and a mixed additive B. R is one or more of Na, Zn, Cu, Sn, Al, Cr, W and Mo; x, y, n, z and m are molar ratios in a specific range. The mixed additive B at least comprises nine components including pre-oxidized graphene, a boron-containing substance, calcium carbonate, silicon dioxide and the like. The preparation method comprises the following steps: mixing the raw materials according to the ratio, pre-calcining, adding the mixed additive B, grinding, carrying out compression molding in a magnetic field, and sintering to obtain a finished product. Through the synergistic effect of component optimization and additives, the residual magnetic induction intensity, the intrinsic coercive force and the coercive force squareness of the material are remarkably improved, meanwhile, the sintering temperature window is widened, the process stability is enhanced, and the method is suitable for large-scale production of high-performance permanent magnetic ferrite products.

The application discloses a preparation method of an apatite-type lanthanum silicate solid electrolyte, and comprises the following steps: step (1), mixing LaCrO3 powder and Ti3SiC2 powder to obtain mixed powder A; step (2), grinding the mixed powder A in anhydrous ethanol as a medium; step (3), drying the ground mixed powder A, and obtaining mixed powder B after the drying; step (4), secondly grinding the mixed powder B to obtain mixed powder C; and step (5), sintering the mixed powder C by using a discharge plasma technology, and obtaining the apatite-type lanthanum silicate bulk material after cooling to room temperature. Compared with a traditional preparation method, the method has the advantages of low sintering temperature, simple process, high efficiency, low cost, energy saving and environmental protection, and the prepared product is dense and has excellent mechanical properties.

This invention relates to the field of high-performance carbon composite materials, and more particularly to a high thermal conductivity pyrolytic graphite foam, its preparation method, and its applications. This invention constructs a "mesophase pitch-based carbon foam-carbon fiber cloth" sandwich composite structure by alternately layering mesophase pitch-based carbon foam and carbon fiber cloth, obtaining a high thermal conductivity pyrolytic graphite foam with high thermal conductivity, high anisotropy, high graphitization degree, and excellent mechanical properties. This solves the problem of insufficient performance of existing carbon foam materials and reveals its structure-property relationship, providing a new technical approach for the development and application of high-performance thermal management materials. It has significant scientific and application value for promoting the development of high-performance thermal management materials. The high thermal conductivity pyrolytic graphite foam provided by this invention combines high deposition uniformity, high multidimensional thermal conductivity, and excellent mechanical properties, and has broad application prospects in the fields of electronic device heat dissipation or aerospace thermal management.

This invention belongs to the field of copper composite material preparation technology, specifically relating to a method for preparing single-walled carbon nanotube-copper composite materials. Single-walled carbon nanotubes are prepared using a flotation catalytic method, followed by acid washing and high-temperature repair purification. Subsequently, the single-walled carbon nanotubes are subjected to mixed acid gradient oxidation, and cobalt nanoparticles are chemically deposited onto their surface. Then, an amorphous titanium dioxide coating is composited onto the modified single-walled carbon nanotubes using a sol-gel method. The composite powder is added to molten copper and mixed uniformly under ultrasonic and magnetic field-assisted stirring. Finally, the mixture is rapidly solidified and hot-drawn into copper rods using a hot-casting method under continuous magnetic field assistance to obtain the single-walled carbon nanotube-copper composite material. This method improves the dispersion and interfacial bonding strength of single-walled carbon nanotubes in the copper matrix and enables the single-walled carbon nanotubes to oriented within the copper matrix. The method is simple, and the prepared composite material exhibits excellent electrical, thermal, and mechanical properties.