1169results about How to "High specific strength" patented technology

Light-weight, heat-managing structures feature open-cell lattice, honeycomb, and/or corrugated (prismatic) arrangements in their substructures, combined with heat pipe/heat plate arrangements for managing heat to which the structures are subjected. The structures are well suited to aerospace applications and may be employed in the leading edge of wings or other airfoil-shaped components; gas turbine engine components; rocket nozzles; and other high-heat, high-stress environments.

The invention belongs to the technical field of high polymer materials, and discloses low coefficient of thermal expansion thermoplastic resin composition, a preparation method and application of the low coefficient of thermal expansion thermoplastic resin composition. The resin composition is composed of, by weight, 340 to 900 parts of thermoplastic resin, 100 to 500 parts of carbon fibers, 0 to 5 parts of antioxygen, 0 to 5 parts of lubricating agent and 0 to 150 parts of flexibilizer. The preparation method comprises adding the 340 to 900 parts of the thermoplastic resin, the 0 to 5 parts of the antioxygen, 0 to 5 parts of the lubricating agent and the 0 to 150 parts of the flexibilizer to a high mixing machine to mix for 1 to 30 min, adding the mixture to a double-screw extruder, adding the 100 to 500 parts of the carbon fibers from the glass fiber feeding port or the side feeding port of the double-screw extruder to mix evenly, and carrying out extruding, dragging and prilling on mixed materials in the double-screw extruder to obtain the low coefficient of thermal expansion thermoplastic resin composition. The use of the low coefficient of thermal expansion thermoplastic resin composition applied to the fittings of a metal piece is provided. The thermoplastic resin is high in flexural modulus, tensile strength and impact strength, and low in linear expansion coefficient.

The invention relates to a thermoplastic resin composite material for laptop shells and a manufacturing method thereof. The composite material comprises the following components in percentage by weight: 40 to 60 parts of thermoplastic resin, 10 to 20 parts of organic fibers, 0 to 20 parts of inorganic fibers, 0 to 10 parts of other aids, and 20 to 40 parts of halogen-free flame-retarding master batch. The manufacturing method comprises: melting thermoplastic resin to obtain melt, immersing fibers into the melt of the thermoplastic resin, adding other aids into the melt, cooling the melt, and making fiber reinforced thermoplastic resin granules; and mixing the granules and the halogen-free flame-retarding master batch in batch to obtain the composite material. Compared with the prior art, the composite material manufactured by the method has high toughness, high strength and high rigidity, and has the characteristics of environment-friendliness, flame retardance, high thermostability, and low-temperature toughness. The thermoplastic resin composite material is an ideal novel laptop shell material.

The invention discloses an automobile steel plate spring assembly with an auxiliary spring made of a composite material. The automobile steel plate spring assembly comprises a U-shaped bolt metal clamping plate, a main spring, the auxiliary spring and a lower gasket. The lower gasket, the auxiliary spring, the main spring and the U-shaped bolt metal clamping plate are sequentially stacked from bottom to top and then are fixedly connected for limiting through a center bolt, and clamping and fixing are assisted through a U-shaped bolt. The main spring is a steel plate spring, and the auxiliary spring is a composite material plate spring. The auxiliary spring is made of the E glass fibers/polyurethane composite material and is integrally formed through a high-pressure RTM technique. The fiber laying layers of the composite material are all 0 degree, and the volume content of the fibers of the composite material is 58%. According to the automobile steel plate spring assembly with the auxiliary spring made of the composite material, on the basis that the requirement for the performance of an automobile steel plate spring is met, design cost is reduced, the mass of the plate spring assembly is lowered, and the service life of the plate spring assembly is prolonged. The invention further discloses an assembly method of the automobile steel plate spring assembly with the auxiliary spring made of the composite material.

The invention belongs to the technical field of building decoration and transportation, and discloses a light-weight and high-strength plastic steel sandwich board and its making method. The plastic steel sandwich board comprises two panels and a sandwich layer fixed between the two panels. The making method of the plastic steel sandwich board comprises the following steps: placing the sandwich layer between the two panels, and respectively bonding the two panels with the right and wrong surfaces of the sandwich layer through an adhesive to prepare the plastic steel sandwich board, wherein each of the panel is obtained through compounding one side of a continuous fiber reinforced thermoplastic plastic board with a non-woven fabric through hot-press molding. The plastic steel sandwich board has the advantages of light weight, high strength, heat insulation, fire resistance, moisture resistance, corrosion resistance and the like.

The invention discloses a polyvinyl chloride (PVC) wood-plastic foaming wood grain section and a preparation method thereof. The wood-plastic foaming wood grain section is prepared from the following raw materials: plastics, an organic filler, an aid, a modifier, a foaming agent, a wood grain masterbatch and the like. The preparation method comprises the following steps of: mixing a foaming mixed material and the wood grain masterbatch and co-extruding from an extruder in a conical twin screw extrusion production line according to a one-step process route; foaming and molding by using a foaming mold; and cooling and shaping by using a shaping mold to obtain the PVC wood-plastic foaming wood grain section. The PVC wood-plastic foaming wood grain section has the advantages of light weight, high specific strength, waterproofness, corrosion resistance and heat preservation, and has the processing characteristic that wood can be nailed, sawed and planed; in addition, the PVC wood-plastic foaming wood grain section has highly simulated solid wood appearance, natural and clear textures, and bright surface color, is an ideal wood-simulated wood-plastic product, and can be widely applied to building, transportation, packaging, home decoration and daily product markets.

The invention discloses a PVC (Poly Vinyl Chloride) wood-plastic foaming composite and a preparation method of the wood-plastic foaming composite. The PVC wood-plastic foaming composite comprises a PVC wood-plastic foaming base material layer and an ASA (Acrylonitrile Styrene Acrylate) layer which is co-extruded and formed on at least one side of the PVC wood-plastic foaming base material layer, wherein the PVC wood-plastic foaming base material layer comprises the following components in parts by weight: 100 parts of PVC, 50-100 parts of paddings, 1-1.5 parts of coupling agents, 5-7 parts of compound stabilizers, 1.0-1.5 parts of compound foaming agents and 6-8 parts of blowing promoters. The PVC wood-plastic foaming composite disclosed by the invention has the characteristics of light weight, high specific strength, water prevention, corrosion prevention, heat preservation, good weather resistance, low formula cost and low material density, and can be widely used in outdoor product markets such as exterior decoration of buildings, garden landscapes, fences, plank ways and the like.

The invention discloses a rolling compounding method for an aluminum/magnesium/titanium three-layer composite plate. The characteristics of high strength of titanium alloy, low melting point and good vibration reducing performance of magnesium alloy, good plasticity and space adaptation of the aluminum alloy, and the like, are utilized and the excellent characteristics of respective component metals are combined by the aluminum/magnesium/titanium three-layer composite plate provided by the invention, so that the high-speed impact damage resisting property which the component metals do not own is acquired. Through the control on the ratio and interface of the aluminum alloy, the magnesium alloy and titanium alloy, the degree of fragmentation, melting and atomizing of shred cloud after the buffer composite plate is subjected to high-speed impact is changed and adjusted, so that the form of the shred cloud is changed, the degree of impact damage to a backplate is reduced, and the high-speed impact damage resisting property is increased. The aluminum/magnesium/titanium three-layer composite plate is applied to an outer layer buffer plate in an outer layer protecting structure of an aerospace vehicle and can be used for replacing a traditional single aluminum alloy material. The space environmental effect and protecting level of the space vehicle are increased; the design level of the space vehicle are greatly promoted, and the service life of the space vehicle are greatly prolonged.

The invention relates to aramid fiber enhanced wood-plastic composite material and a preparation method thereof, relating to fiber enhanced wood-plastic composite material and the preparation method thereof. The invention solves the problem that the existing wood-plastic composite material has bad comprehensive mechanical property. The wood-plastic composite material comprises thermoplastic, wood fiber material, lubricant, bulking agent and graft modification aramid fiber. The preparation method of the invention is as follows: 1. weighing raw materials; 2. preparing premixing materials; 3. melting, extruding and molding the premixing materials to obtain the fiber enhanced wood-plastic composite material. The preparation method utilizes carbon-carbon double bond and silane alkyl on the surface of modified aramid fiber and polyolefin and wood flour to form chemical bonds so that aramid fiber and polyolefin has good compatibility, and effectively enhances the interface binding force of the composite materials; the aramid fiber enhanced wood-plastic composite material simultaneously has high strength, high tenacity, and good comprehensive mechanical property. The method can be used for producing the wood-plastic composite material with high performances such as structural engineering materials, etc.

The invention discloses high-plasticity two-phase yttrium-containing magnesium-lithium-aluminum alloy and a preparation method thereof. The alloy comprises the following specific components in percentage by weight: 9.50-10.80% of Li, 3.00-5.00% of Al, 0.50-0.70% of Y, 0.10-0.30% of Zr and the balance of Mg; the alloy has the structural characteristics that an alpha phase, a beta phase and a precipitated phase exist at the same time, wherein the alpha phase is a Mg-based solid solution and is in a close-packed hexagonal structure, the beta phase is a Li-based solid solution and is in a body-centered cubic structure, and the precipitated phase is a rare earth compound Al2Y; and the alloy has the characteristics of low density, high plasticity and higher strength. The preparation method disclosed by the invention is a normal-temperature plastic deformation method which combines casting with equal channel angular extrusion or traditional extrusion deformation process; and compared with the traditional high-temperature deformation process, the preparation method has good practicality and is simpler and more convenient to operate, and can be used for effectively lowering the production cost, thus the preparation method has good industrial production prospects.

The present invention relates to a kind of magnesium aluminium bimetal composite pipe/rod material. It is formed from interior magnesium alloy pipe/rod material and aluminium alloy layer covering surface of said interior magnesium alloy pipe/rod material. Its processing process includes the following steps: utilizing aluminium alloy and magnesium alloy to prepare combined ingot, heating said combined ingot and heat-insulating, extruding and straightening so as to obtain the invented product. Its extruding ratio is greater than 10, heating temperature is 300-400 deg.C, heat-insulating time is 1-5h and extruding speed is 0.5-3m/min.

The invention relates to a light-weight and high-strength thermoplastic composite material sandwich board and a production method thereof. The light-weight and high-strength thermoplastic composite material sandwich board comprises two panels and a sandwich layer, wherein the sandwich layer is fixedly arranged between the two panels. The preparation method comprises the following steps: putting the sandwich layer between the two panels; and sticking the two panels on the front and rear faces of the sandwich layer by a thermoplastic glue film through a hot pressing process and a cold pressing process to produce the thermoplastic composite material sandwich board. The panels are continuous fiber enhanced thermoplastic composite material boards and the sandwich layer is made of a honeycomb aluminum material. Compared with the prior art, the thermoplastic composite material sandwich board has the advantages of light weight, high strength, heat preservation, fireproof prevention, moisture prevention, corrosion prevention and the like.

The invention relates to a method of processing titanium alloy. The method of casting and melting the titanium alloy is: after wax pattern is made, a shell is made; and then processes of de-waxing, roasting, pouring and post-processing are practiced. Wherein, the process of roasting adopts fireproof silica solution coating to make the shell. Refractory fillers are yttrium oxide of 95 per cent and zirconia mixture powder of 5 per cent. The shell is made up of 6 layers and a half to 8 layers and a half. The process of melting begins when vacuum of the melting and the pouring reach 6.65 to 0.665 Pa. When the temperature of titanium reaches the required temperature, a centrifugal rotary table is started and rotational speed is adjusted to reach all values. The whole pouring process is completed within 3 to 5 minutes. After a casting is cooled in a furnace until the temperature of the casting is below 400 DEG C, a precise casting of titanium alloy is manufactured. The titanium alloy manufactured by the invention has a wider operation temperature range, the low temperature of which is 253 DEG C below zero and the high temperature of which is 550 DEG C. The titanium ally manufactured by the invention has low density, light weight, high strength, good resistance to decay and stable property, which can be used in different medium such as nitric acid and manganic acid.

A manufacturing method of a carbon fiber metal composite laminated plate relates to a manufacturing method of a fiber metal composite laminated plate. The method aims at solving the problems that no manufacturing methods for manufacturing aircraft structural material with high specific stiffness, high specific strength, tenacity and workability exist in China. The method comprises the following steps of: carrying out surface treatment to three pieces of metal plates; winding a carbon fiber composite material layer which is soaked in liquid cement on one of the metal plates, wherein, the liquid cement is prepared by epoxy resin, a metaphenylene diamine curing agent and an anhydrous alcohol solvent according to the mass ratio of 1:0.1 to 0.18:0.15 to 0.2; fixedly arranging another two metal plates on the upper surface and the lower surface of the carbon fiber composite material layer so as to be integrally put into a mould, and then treated with mould assembling, drying, solidification by adopting the method of gradient temperature increasing, and demoulding. The manufacturing method of the invention is simple and is easy for operation. The carbon fiber metal composite laminated plate manufactured by the method of the invention has the advantages of high specific stiffness, high specific strength, also high tenacity and workability of metal material, good fatigue property, and good damage tolerance capability.

The invention discloses a thermosetting plastic. The thermosetting plastic is characterized by comprising the following components in parts by weight: 60-95 parts of thermosetting resin, 5-40 parts of low-shrink additive, 150-300 parts of an inorganic mineral filler, 2-4 parts of an initiator, 0.6-1 part of calcium hydroxide micro powder, 2-6 parts of zinc stearate micro powder and 30-60 parts of glass fiber. In comparison with a conventional thermosetting plastic, the thermosetting plastic can be solidified more rapidly, high strength can be maintained within a wide temperature range, and the flame-retardant effect is good.

The present invention provides a conductive diamond electrode having: a conductive substrate; a coating layer formed on a surface of the conductive substrate, the coating layer containing one of a metal and an alloy each including at least one of niobium and tantalum; and a conductive diamond layer formed on a surface of the coating layer, and a process for producing the conductive diamond electrode.

The invention provides a hot press molding device for a carbon fiber enhanced polyether-ether-ketone (PEEK) composite board. The hot press molding device comprises a hydraulic machine, a molding die and a vacuum system. According to the device, a heating unit is separated from the hydraulic machine, and a heating pipe is used for heating the die to achieve a high temperature hot pressing function; by carrying out hot press molding in a vacuum environment, the content of bubbles in resin can be greatly reduced, and the test piece surface smoothness and workpiece performances are improved; a cooling unit is arranged in the die, and cooling speed is regulated by regulating the flow and temperature of high pressure cold air, so as to control the crystallinity of matrix resin and realize flexible selection between high strength and high toughness. Correspondingly, the invention also provides a hot press molding method for the carbon fiber enhanced polyether-ether-ketone (PEEK) composite board. A carbon fiber enhanced polyether-ether-ketone (PEEK) composite board produced by adopting the device and the method disclosed by the invention through hot press molding is simple in production equipment and solves the problems that material internal porosity is large, resin impregnation fiber is insufficient, test piece performance is insufficient, molding cycle is long and the like during production of polyether-ether-ketone resin with high melting point and high viscosity.

The invention belongs to the technical field of aluminum alloy materials for power equipment, and particularly relates to a manufacturing method of a high-strength high-conductivity aluminum alloy large-scale bar. A 6063 high-strength high-conductivity large-specification bar is used for processing a high-strength high-conductivity large electric element in power equipment, particularly a 6063T6 aluminum alloy bar with a diameter over 150-300mm. A sixth-system round aluminum alloy ingot is adopted and contains the following elements in percentage by mass: 0.40-0.44% of Si, less than or equal to 0.13% of Fe, less than or equal to 0.1% of Cu, less than or equal to 0.10% of Mn, 0.55-0.60% of Mg, less than or equal to 0.05% of Zn, less than or equal to 0.05% of Ti, less than or equal to 0.10% of Cr, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of all impurities and the balance of Al. The problems in production and delivery can be effectively solved, the strength and conductivity of the large-specification aluminum alloy bar are improved, and the processing and application are facilitated; by adopting the method, the mechanical properties and conductivity are stable; and through repeated reproduction operations, the national standard for a diameter below 150mm can be met, the national standard for bars with diameters over 150-300mm can be supplemented or completed, and all performance indexes are introduced into the national standard.