30results about How to "Has shape memory effect" patented technology

The invention relates to NxMy high-entropy alloy with a shape memory effect and a preparing method thereof. The alloy comprises NxMy, wherein x is larger than or equal to 45 and smaller than or equal to 55, y is larger than or equal to 45 and smaller than or equal to 55, the N is any two or more of Ti, Zr, Hf, V, Nb, Ta, Mo and W and the M is any two or more of V, Mn, Fe, Co, Ni, Cu, Cr and Zn; and the content of the Ti, the content of the Zr, the content of the Hf, the content of the V, the content of the Nb, the content of the Ta and the content of the Mo in the N are each larger than or equal to 5% and smaller than or equal to 35%, and the content of the V, the content of the Mn, the content of the Fe, the content of the Co, the content of the Ni, the content of the Cu, the content of the Cr and the content of the Zn are each larger than or equal to 5% and smaller than or equal to 35%. A body-centered cubic single-phase solid solution with the volume fraction not lower than 95% and an intermetallic compound form the alloy phase structure. The alloy is prepared through an electric arc melting method. The alloy has the shape memory effect within a wider temperature range and meanwhile has the high-entropy alloy feature. The NxMy high-entropy alloy and the preparing method have wide application prospects in the fields of aerospace, mechanical electronic products and low-temperature industries.

The invention discloses a self-repair material with a shape memory effect. The self-repair material is prepared from a shape memory polymer material, a shape memory function can be achieved under the stimulation of light, heat, electricity and magnetism, and moreover, the self-repair and healing purposes are achieved. The composition and preparation method of the self-repair material are diversified, the shape change and self-repair functions of the shape memory material can be achieved through different manners, and the application of the shape memory material in the fields such as spaceflight, aviation, medical treatment and bioengineering is expanded.

The invention relates to a vibration-isolating device, in particular to a combined vibration-isolating device. A ball/disc spring vibration-isolating device comprises a vibration-isolating support, and the upper end of the vibration-isolating support is connected with a damper. The device is not only suitable for a newly-built structure, but also suitable for anti-seismic reinforcement and post-earthquake repair of an original structure. Moreover, the device is applicable to ordinary civilian housings, civil engineering such as structures, bridges and the like, as well as storey-increased buildings and shifting buildings. The device can also be applied in vibration isolation and reduction of instruments and equipment and has low manufacturing cost and broad application prospects.

The invention discloses a 4D-printing shape-memory-polymer-composite-material tracheal stent and a preparing method thereof, and belongs to the technical field of 4D printing. As for the problem thata traditional tracheal stent is difficult to implant, and the secondary stricture problem caused by the overlarge hole diameter of the tracheal stent, and the problem that as the hole diameter of thetracheal stent is over small, swinging of airway cilia is blocked, a compound of a shape memory polymer and nanometer iron oxide serves as a material, a curve-edge rectangle serves as a basic unit, and a tracheal-stent three dimensional structure model is designed; the tracheal-stent three dimensional structure is printed and formed with the fused deposition or direct writing printing method, is subjected to electrostatic spinning medicine carrying covering, and then is subjected to in-vitro remote excitation so that the shape of the stent is recovered, and a formed tracheal stent is obtained.The 4D-printing shape-memory-polymer-composite-material tracheal stent and the preparing method thereof are suitable for production of the tracheal stent.

The invention discloses a method for manufacturing a damping structural piece of an aviation engine supporting system; a shape memorizing alloy wire is manufactured into metal rubber through the combined processes of manufacturing an elastic wire at low temperature, heat setting, winding and full-constraint heat setting; and the damping structural piece which is manufactured through the method has a shape memorizing effect and a variable rigidity characteristic. According to the method for manufacturing the damping structural piece of the aviation engine supporting system, a damping material in the metal rubber structure is integrated with a shape memorizing alloy, and a novel metal structural functional material with the advantages of the metal rubber and the shape memorizing alloy is developed. The material has good damping performance, high deformation capability and high bearing capability, and has the advantages of active and controllable elastic modulus, strong environment adaptability and stable and reliable structure. Because the advantages of the metal rubber and the shape memorizing alloy are integrated, the method can be applied in aviation engine rotor supporting and a non-peak rotor can be realized.

The invention belongs to the technical field of 4D printing additive manufacturing, and discloses a 4D printing method of a nickel-titanium-based ternary shape memory alloy. The 4D printing method ischaracterized in that a selective laser melting technology is adopted for printing gas atomized prefabricated NiTiZr ternary alloy powder, and a component obtained through printing has the shape memory function; and the laser energy density is changed by changing the technological parameters adopted in the selective laser melting technology, and therefore the changes of the structure and performance of the printed piece are regulated and controlled. According to the 4D printing method, the ternary component Zr is introduced into an existing nickel-titanium binary alloy, the martensite phase transformation temperature is obviously increased, the selective laser melting technology is adopted for forming, and complex parts uniform in structure and high in density can be obtained while the excellent shape memory performance and mechanical performance are guaranteed.

The present invention relates to a soft palate superelastic NiTi support for curing obstructive sleep aponea low-ventilation syndrome and its preparation method. It is characterized by that the described support is formed into a closed tongue-shaped structure made up by using superelastic NiTi marmem wire material through a certain winding process. Besides, said invention also provides the concrete steps of its preparation method.

The invention discloses a preparation method of a metal-based shape memory composite. The preparation method comprises the steps that NiTi metal powder layers are laid between to-be-prepared adjacent metal plates to obtain laminated plates, the laminated plates are subjected to accumulative ply rolling treatment to obtain a composite plate, it is guaranteed that the corresponding NiTi metal powder layer is laid between any two adjacent metal plates in the accumulative ply rolling treatment process, and the composite plate is subjected to friction stirring processing treatment to obtain the metal-based shape memory composite. The reduction rate of each pass of accumulative ply rolling ranges from 40% to 55%, and the number of the rolling passes of accumulative ply rolling ranges from 2 to 8; and the rotating speed of friction stirring processing ranges from 375 r/min to 1,180 r/min, the advancing speed of friction stirring processing ranges from 75 mm/min to 235 mm/min, and the reduction rate of friction stirring processing ranges from 0.2 mm to 0.5 mm. Through the adoption of the laminating welding deformation method, the metal plates on different layers are changed, SMAs different in particle size and content are evenly and flatly laid between the plates, metal materials with different structures and properties can be prepared out, and the novel functional material in different service environments is met.

The invention discloses an expandable landing ladder with a shape memory effect and relates to the field of spaceflight. The expandable landing ladder is used for solving the problem that an existinglanding ladder is complex in structure and large in weight and consequently bears the large weight during launching. Two omega-shaped shape memory composite beams are oppositely closed; a gap betweenthe two omega-shaped shape memory composite beams is filled with shape memory foam; two resistance-type heating sheets are pasted to the inner surfaces of the two omega-shaped shape memory composite beams correspondingly, and the resistance-type heating sheets are used for increasing the temperature of the omega-shaped shape memory composite beams to be larger than the glass-transition temperatureof the omega-shaped shape memory composite beams in the power-on state, so that the omega-shaped shape memory composite beams are expanded; and the shape memory foam has compressibility and is used for providing the extra bearing capacity for expanding of the omega-shaped shape memory composite beams. The expandable landing ladder serves as an important bridge for connecting a lander with the surface of a planet.

The invention relates to a preparation method of poly(sebacoyl diglyceride) shape memory elastomer. The preparation method \ comprises the following steps: (1) preparing a monomer sebacoyl glycidyl ester; (2) preparing poly(sebacoyl diglyceride); and (3) preparing the poly(sebacoyl diglyceride) shape memory elastomer. The crosslinking degree of PSeD is adjusted to make the crosslinked PseD have elasticity, shape memory effect and thermoplasticity; and the crosslinked PSeD has good shape memory performance, the shape transition temperature is between room temperature and the human body temperature, and the crosslinked PSeD is expected to be developed temperature response shape memory smart materials (the shape memory performance nearby the human body temperature is realized).

The invention provides a manufacturing method of a nickel-titanium alloy component, and the nickel-titanium alloy component. The manufacturing method comprises the following steps: 1) nickel-titanium alloy powder is pre-arranged to form a to-be-treated layer, and in the nickel-titanium alloy powder, the atomic percent of Ni element is 49.8%-50.8%, and the balance is Ti atoms; 2) laser melting treatment is carried out on the to-be-treated layer according to printing process parameters to form a target layer; 3) the step 1) to the step 2) are repeatedly executed, and the nickel-titanium alloy component is formed; in the laser melting treatment, the laser power ranges from 90 W to 150 W, and the laser scanning speed ranges from 400 mm/s to 1200 mm/s; and the nickel-titanium alloy component is of a porous structure. The method is simple and easy to operate, the raw materials and the manufacturing parameters of the nickel-titanium alloy component are limited, the prepared nickel-titanium alloy component can show high shape recovery after large deformation greater than or equal to 50%, and a high shape recovery rate can still be kept after multiple times of cyclic deformation.

The invention belongs to the technical field of automatic control, and particularly relates to a miniature wireless control platform. The miniature wireless control platform includes a general control platform that transmits a control signal and a miniature control module that receives the control signal, wherein the miniature control module includes a power supply, a microprocessor, a miniature brushless motor and a shape memory alloy, the power supply supplies power to the microprocessor, the microprocessor processes the control signal and drives action of the miniature brushless motor and the shape memory alloy, and the shape memory alloy acts to realize rotor position detection of the miniature brushless motor. The shape memory alloy has a shape memory effect, and can realize shape changes of stretch and contraction according to the temperature of itself, and through replacement of a position sensor with the shape memory alloy, the miniature wireless control platform is simple in structure, small in size and low in cost, and has a relatively long service life at the same time.

The invention relates to a tin-silver-zinc self-adapt leadless solder with shape memory function and relative preparation, wherein in the tin-silver-zinc leadless solder whose purity is 99.99% and mass percentages are 96.5-93: 3.0-4.5: 0.5-2.5, there is silver-zinc metal phase with shape memory function; then it adds 0-2.5 gallium and 0-4 indium to improve humidity. The invention uses the silver-zinc thermoelasticity martensite of solder to obtain shape memory function. And it has compact combination and uniform distribution, compared with nickel-titanium alloy leadless solder.

The present invention belongs to the field of composite lead-free welding material technology. The composite welding material contains lead-free welding material of Sn and Ag in the weight ratio of 96.5 to 3.5 and shape memory alloy of Cu, Zn and Al in the weight ratio of 66-74 to 24-28 to 2-6 and grain size of 20-50 microns in the content of 1-5 wt%. The preparation process of the composite welding material includes the following steps: preparing eutectic lead-free welding material through smelting with Sn and Ag in purity of 99.99 %; preparing the shape memory alloy thermoelastic martensite of Cu, Zn and Al; and hot mixing the shape memory alloy grains and the eutectic lead-free welding material and water cooling. The composite welding material can prolong the service life of weld spot in varying work temperature owing to the shape memory effect.

The invention provides a non-isocyanate-based polyurethane monomer and thermosetting non-isocyanate-based shape memory polyurethane as well as preparation and recycling methods thereof, and relates to the technical field of polyurethane synthesis. The non-isocyanate group polyurethane monomer provided by the invention has a structure as shown in a formula I to a formula III. The non-isocyanate-based polyurethane monomer provided by the invention has a plurality of five-membered cyclic carbonates, and polyurethane generated after a cross-linking reaction with polybasic primary amine has a shape memory effect and is programmable in shape; the polyurethane has excellent mechanical properties, and is high-strength non-isocyanate-based polyurethane; recycling can be achieved through simple hot pressing, and therefore durability and environment friendliness are achieved. According to the preparation method of the non-isocyanate polyurethane monomer, cyclic carbonate with double bonds and mercaptan are subjected to a click reaction to prepare the polyurethane monomer with multiple five-membered cyclic carbonate, the reaction is rapid and efficient, and the reaction time does not exceed 10 min.

The invention provides a shape memory alloy driving element which is made of a shape memory alloy material and comprises a driving execution section and a restraining section, a shape memory alloy in the driving execution section has a crystal structure, and a shape memory alloy in the restraining section has an amorphous/crystal multiphase structure. The invention further provides a machining process of the shape memory alloy driving element. The shape memory alloy driving element provided by the invention has a dual microstructure, can be used for intelligent execution devices such as a thermostatic valve and a high-temperature alarm, realizes accurate control from millimeter level to micron level, and provides a key element material for microelectronic devices, minimally invasive surgical instruments and micro/nano-level medical robots.

The invention discloses a forming method and application of a high-shape-memory high-flexibility and negative-Poisson-ratio fabric. The forming method comprises the steps of drawing a design drawing of a negative-Poisson-ratio fabric of a folding structure, and distinguishing a non-folding area and a folding area composed of a convex area and a concave area; selecting elastic yarns and non-elastic yarns; designing a fabric weave structure adopted by the elastic yarns and the non-elastic yarns; laying a weave on the design drawing according to the fabric weave structure; generating a pattern file; performing weaving on a weaving machine to form the negative-Poisson-ratio fabric of the folding structure; and loading a shape memory material on the woven negative-Poisson-ratio fabric or directly weaving the shape memory material in the weaving process. The weaving method is adopted for one-time forming; the fabric is endowed with the folding diversity, the structural stability, the negative-Poisson-ratio effect and the shape memory effect; the folding structure is subjected to bidirectional large deformation under excitation so as to generate the negative-Poisson-ratio effect and high flexibility; and the fabric can be restored to the initial form after excitation is removed.