51 results about "Paracrystalline" patented technology

The invention discloses a nano-porous Pd material prepared through quasi-crystal de-alloying and a preparation process of the nano-porous Pd material, belonging to the technical field of new materials. The nano-porous Pd material contains 8-12at.% of Al, less than 1at.% of TM and the balance of Pd in percentage by atom. A precursor namely a quasi-crystal alloy required for preparing the material is low in cost, and the overall technological process is environment-friendly, simple and efficient; a prepared nano-porous structure is complete. The quasi-crystal alloy with special structures is used as the precursor, and the chemical composition of the quasi-crystal alloy is Al1-x-yPdxTMy (TM is Mn, Co, Fe, Cr, V or Mg, wherein x is more than or equal to 10at.% and is less than or equal to 25at.%, and y is more than or equal to 3at.% and is less than or equal to 15at.%); by putting the quasi-crystal alloy into a dilute saline solution under room temperature, the nano-porous Pd material can be obtained through an electro-chemical de-alloying process with a constant-voltage mode in a voltage range of 0-0.2V (a reference electrode is a saturated calomel electrode). Prepared nano-porous Pd is uniform in structure, stable in pore and ligament size and unordered in crystallographic orientation, shows excellent room-temperature ethanol/methanol electro-oxidation reaction catalytic performances in alkaline solutions, can keep the high catalytic performances after being used repeatedly for many times, and can be applied to an anode catalyst of a fuel cell such as an alkaline ethanol cell and the like.

The invention provides a kind of single icosahedron quasicrystal material with hydrogen storing function. Its component is Ti100-x-y-zZrxNiyCuz, thereinto, 10 < x < 45, 5 < y < 20, 1 < z < 10. the forming ability of the alloy quasicrystal is strong, and the formed quasicrystal material is single icosahedron structure. It is thermodynamics is stable, and has good hydrogen storing function. It can be applied in gaseous state hydrogen storing material and battery cathode material; meantime, it provides a kind of producing method of the material: according to the count of the component formula of the quasicrystal material, choose powders of Ti, Zr, Ni, and Cu of 100 holes per cm2 chemical purity, encase them in the ball milling pot of the high energy ball mill, the ball material rate is 20 : 1, ball mill for 100 - 200 hours under the protection of argon, seal the ball milled alloy powders in the quartz tube, have heat processing at 1 í‡ 10-3 Pa, the heat processing temperature is 480 - 650 Deg. C, the time is 0.5 - 6 hours. Its craft is simple, the operational ability is strong, and it is easy to be industrialized.

The invention relates to a method for preparing an icosahedral quasicrystalline phase and long-period stacking ordered structure combined reinforced Mg-Zn-Y alloy. The alloy prepared by the method contains the chemical elements in percentage by mass: 10wt% of Zn and Y and the balance of Mg, wherein Zn is added in the form of pure Zn, Y is added in the form of Mg-25wt%Y intermediate alloy, and Mg is industrial pure magnesium. According to the method, alloy structures, obtained after magnesium alloy is subjected to smelting, metal type molding and solid solution and grading aging treatment, are an alpha-Mg solid solution, an icosahedral quasicrystalline phase and a long-period stacking ordered structure phase; a quasi-crystal, which is formed through dispersion precipitation, depends on strong pinning on dislocation and forms a firm interface with a matrix, so that the magnesium alloy can be remarkably reinforced; a long-period structure and a matrix interface are in coherency, so that the thermal stability is very high, the coarsening is not easy, the dislocation motion and the extension of deformation twin crystals can be remarkably hindered, the mechanical properties of the alloy are improved obviously, the tensile strength can reach 352MPa to the maximum, and the elongation percentage can reach 7.5%. The method is beneficial to the promotion of the extensive application of high-strength magnesium alloy in many fields, such as automobiles, aviation and electronic communication.

The invention discloses a method for preparing nano quasi-crystal reinforced Mg-Zn-Y alloy by means of equal channel angular pressing. The method includes the following steps that A, cast-state Mg-Zn-Y alloy is prepared according to the set atomic percentage composition ratio of all components and comprises 0.5%-6% of Zn, 0.08%-1.2% of Y and the balance Mg based on the set atomic percentage composition of all the components, and the atomic percentage composition specific value of the Zn to the Y is 5-7:1; B, the cast-state Mg-Zn-Y alloy is annealed for 8-20h at the temperature of 380-420 DEG C, and furnace cooling is conducted; C, the annealed Mg-Zn-Y alloy is subjected to hot extrusion after heat preservation lasts for 2-4h at the temperature of 300-400 DEG C, the extrusion temperature is300-400 DEG C, and the extrusion ratio is 9-60:1; D, the Mg-Zn-Y alloy processed through hot extrusion in the step C is put into a thermal treatment furnace, the furnace temperature rises to 540-600DEG C, heat preservation lasts for 5-20min, and quenching is performed; and E, the Mg-Zn-Y alloy obtained in the step D is subjected to equal channel angular pressing after heat preservation lasts for2-4h at the temperature of 180-330 DEG C, and accordingly the nano quasi-crystal reinforced Mg-Zn-Y alloy can be obtained. By adoption of the method, the high-performance magnesium alloy with good yield strength, tensile strength and ductility can be prepared.

The invention discloses a low-temperature diffusion bonding method for adding quasi-crystal interlayers to aluminum-steel-aluminum. The method includes the main steps that quasi-crystal aluminum silicon copper middle transition alloy foil sheets are arranged between contact interfaces to be welded of aluminum plates and contact interfaces to be welded of a low-carbon steel plate, vacuum diffusion bonding is conducted, processing parameters are that the bonding temperature is controlled in the range of 420 degrees to 490 degrees, the heat preservation time under the bonding temperature ranges from 15 min to 25 min, the pressure ranges from 0.3 MPa to 0.9 MPa, and the vacuum degree is 1.33*10<-3> Pa-1.33*10<-2> Pa. By means of the method, low-temperature diffusion bonding of the aluminum and the low-carbon steel can be achieved, the diffusion interfaces of the formed aluminum-steel-aluminum composite structure is firm in combination, reliable in bonding quality and high in production efficiency. The low-temperature diffusion bonding method for adding the quasi-crystal interlayers to aluminum-steel-aluminum has the advantages of being precise in processing parameter control, low in cost and the like, and the bonding temperature can be reduced.

The invention belongs to the technical field of laser holography interference and relates to a laser holography interference method of a similar-one-dimensional structure for preparation. The laser holography interference method comprises the steps of firstly taking five laser beams through a laser device and enabling the laser beams to be symmetrically distributed and converged in the vertical direction, adding a single dielectric film high-reflexivity mirror at the converged position of the five laser beams, reflecting the five laser beams through the single dielectric film high-reflexivity mirror to produce five mirror image light beams consistent to original laser beam parameters, and then selecting exposure quantity according to the selected laser beams to obtain a quasi-crystal-period three-dimensional model; then adopting a polarization adjusting technical method and utilizing a single-wave-length half-wave plate to adjust polarization angles of the five laser beams from 0 degree to 90 degrees, namely obtaining the similar-one-dimensional structure laminated structure. The laser holography interference method is simple, reliable in principle, controllable in process, simple and convenient to operate, low in cost, high in repeatability, easy to achieve and capable of being widely applied to preparation of multiple light-sensitive media.

The invention relates to a methane sensor, in particular to a SPR-based high-sensitivity photonic quasi-crystal fiber methane sensor, the methane sensor is a photonic quasi-crystal fiber, a cladding of the methane sensor is composed of two layers of air holes arranged according to a sextuple Penrose type quasi-crystal structure, the first layer is provided with six inner layer air holes, and the surrounding area is a fiber core; the second layer comprises eight outer-layer air holes, wherein the diameters of four inner-layer air holes above and below the fiber core are smaller than the diameters of the other two inner-layer air holes; and the photonic quasi-crystal fiber is made of silicon dioxide, the two sides of the photonic quasi-crystal fiber are symmetrically and laterally polished, the two laterally polished surfaces are plated with silver films, the surfaces of the silver films are coated with methane sensitive films, and the double-sided structure can effectively enhance the surface plasma resonance effect. The methane sensor is simple in structure, easy to manufacture and high in sensitivity, and the detection difficulty is reduced.

The invention relates to a method for preparing an amorphous alloy thin strip through Mg-Zn-Gd quasi-crystal alloy. The method is characterized in that on the basis of successfully preparing the Mg-Zn-Gd quasi-crystal alloy, components for forming quasi-crystals are selected for successfully preparing the amorphous alloy and include, by mass, 45.32-48.29% of Zn, 11.61-18.16% of Gd and the balance Mg. The method includes the steps that the Mg-Zn-Gd quasi-crystal alloy which is high in quasi-crystal content and even in texture is obtained; technology parameters of the quasi-crystal intermediate alloy are adjusted through a fast solidification method; and the amorphous alloy thin strip prepared through the Mg-Zn-Gd quasi-crystal alloy is obtained, wherein the maximum length of amorphous alloy thin strip samples obtained in experiments is 250 cm. According to the preparing method for the amorphous alloy thin strip through Mg-Zn-Gd quasi-crystal alloy, the obtained amorphous alloy thin strip has the characteristic of a melt of the quasi-crystal alloy and also has the typical steamed bread peak of amorphous alloy and the exothermic peak in the heating process of differential thermal analysis. The application range of magnesium alloy in practical production and life can be further improved through the amorphous alloy thin strip prepared through the method.

The invention discloses a zirconium-based tough nanocrystalline alloy material and a preparation method thereof. The zirconium-based tough nanocrystalline alloy material comprises following componentsas shown in the following expression of Zr65Al7.5Ni10CuaAub, wherein a and b respectively represent atomic percentages of Cu and Au elements, and a and b satisfy the following conditions: 2.5<=a <=11.5, 6<=b<=15, and a+b =17.5. According to the method, a zirconium-based amorphous alloy strip is rolled at the temperature of minus 200 to minus100 DEG C by an ultralow-temperature rolling method, sothat the alloy strip with a nano quasi-crystal/amorphous composite structure is obtained. The zirconium-based tough nanocrystalline alloy material obtained through the ultralow-temperature rolling method has good bending toughness and room-temperature stability, the defect that in the prior art, a quasicrystal composite structure material is usually brittle at the room temperature is overcome, andthe zirconium-based tough nanocrystalline alloy material can be used in the field of nanometer quasicrystal/amorphous composite structure materials with certain requirements for toughness and stability.

The invention discloses a method and a system for forming a quasi-crystal coating and cookware. The method for forming the quasi-crystal coating comprises the steps as follows: (1), a primary coatingis formed on a substrate on the basis of quasi-crystal powder; and (2), the primary coating is subjected to annealing treatment to obtain the quasi-crystal coating. According to the method for formingthe quasi-crystal coating, the primary coating formed by the quasi-crystal powder is subjected to the annealing treatment, so that the surface properties of the quasi-crystal coating can be effectively improved.

The invention provides a pot and a cooking utensil. The pot comprises a pot body; and a titanium-based crystal coating which is arranged on the inner surface of at least one part of the pot body and comprises an icosahedron quasicrystal phase. Therefore, the titanium-based crystal coating has better corrosion resistance and non-stickiness, so that pitting corrosion can be effectively avoided when the cookware is used in an acidic aqueous solution containing more chloride ions, the corrosion resistance of the cookware is improved, and the service life of the cookware is prolonged; in addition, due to the icosahedron quasicrystal phase, the surface energy of the titanium-based crystal coating is low, and the non-stickiness of the titanium-based crystal coating can be further improved.

The invention provides a cooker and a preparation method thereof and a cooking utensil. The cooker comprises a cooker body and a quasi-crystal coating film. The quasi-crystal coating film is arrangedon the inner surface of the cooker body, and the quasi-crystal coating film is prepared through magnetron sputtering or multi-arc ion plating. Thus, the quasi-crystal coating film is high in density,and good heat conductivity is achieved while the non-stick performance is met. The quasi-crystal coating film serves as the inner surface coating of the cooker, heat can be transferred to conditionedmatter (food in contact with the cooker), and therefore the cooker has good non-stick performance, hardness and corrosion resistance; the quasi-crystal coating film is smooth in surface, the non-stickperformance of the cooker can be further improved, and cleaning is convenient; and in addition, the quasi-crystal coating film is dense and can be attached to the surface of the cooker body forcefully.

The invention discloses a pot and a cooking utensil comprising the same. The pot comprises a pot body and a quasi-crystal layer, wherein the quasi-crystal layer is formed on the inner surface of the pot body, and the surface of the quasi-crystal layer is a silver quasi-crystal reflecting surface. The pot not only has the excellent and lasting non-stick performance, but also facilitates uniform heating of food during food cooking and achieves the effect of energy saving.

The invention relates to a coating, a preparation method thereof and cooking utensil. The coating comprises multiple sub-coatings containing quasi-crystal materials, wherein the multiple sub-coatingsare sequentially stacked from bottom to top, and the particle size of the quasi-crystal material in at least one coating is greater than that of the quasi-crystal material in at least one above sub-coating. The coating disclosed by the invention is good in non-stickness, low in cost, simple in preparation process, easy to industrialize, and especially suitable for the cooking utensil.

A preparation method of a terrace-shaped appearance Al-Cu-Fe quasi crystal block material mainly includes the steps of mixing and pressing 52-57% of high-purity Al powder, 40-42% of Cu powder and 3-6% of Fe powder into a prefabricated blank, putting the prefabricated blank in a crucible in a graphite composite heating body, sealing the crucible with pyrophyllite, putting the crucible in a drying box at the temperature of 180 DEG C to remove adsorbed moisture, putting the dried h-BN crucible and the graphite composite heating body in a cavity of a hinge type cubid press, conducting synthesizing at pressure of 3-6 GPa, keeping the temperature at 1273 K to 1373 K for 30-60 minutes, lowering the temperature to 973-1073 K, and keeping the temperature for 2-3 hours to obtain the terrace-shaped appearance Al-Cu-Fe quasi crystal block material. The method is simple, effective and stable in process, the prepared quasi material is dense, extremely-high condensation speed required for reaction is decreased, and the terrace-shaped appearance quasi crystal block material can be obtained within a wide component range.

The invention provides an ultrasonic laser welding method and a metal material.The welding method comprises the following steps that S10, a first plate and a second plate are obtained; wherein the first plate comprises a first surface and a second surface which are opposite to each other, the second plate comprises a third surface and a fourth surface which are opposite to each other, and the first surface and the third surface are subjected to surface treatment; s20, the third face is subjected to texturing treatment; s30, the first plate and the second plate are oppositely placed, so that the first face and the third face are attached; wherein a middle metal layer is arranged between the first surface and the third surface; and S40, the first plate and the second plate are welded in an ultrasonic laser welding mode, so that a quasi-crystal structure is generated between the first plate and the second plate. According to the method, generation of a brittle phase is reduced in an ultrasonic laser mode, meanwhile, grains are refined, a quasi-crystal structure is formed, and the strength of a welding seam is improved by means of the characteristic that quasi-crystals enhance dispersion distribution.

The invention provides a binary nano-crystalline super-lattice material. The binary nano-crystalline super-lattice material is a UCNPs-Au super-lattice with a quasi-crystal structure, and the UCNPs-Au super-lattice is formed by self-assembly of lanthanide doped up-conversion luminescent nano-crystalline UCNPs and Au nano-particles. The invention also provides a preparation method of the binary nano-crystalline super-lattice material. The binary super-lattice material is uniform in structure, the thickness is easy to regulate and control, the range of the two-dimensional quasi-crystal structure can reach the micron level, and the regulation and control effect of the plasma effect of Au nano-particles on the up-conversion luminescence property can be researched in the quasi-crystal structure.

A quasi-crystal organic light-emitting display panel including a first electrode layer, an organic light-emitting layer, a second electrode layer, a buffer layer, a 10-fold quasi-crystal layer and a package cover is provided. The organic light-emitting layer is located on the first electrode layer. The second electrode layer is located on the organic light-emitting layer. The buffer layer is located on the second electrode layer. The 10-fold quasi-crystal layer is located on the buffer layer. The package cover is located on the 10-fold quasi-crystal layer. A method for simulating optical efficiency of the quasi-crystal organic light-emitting display panel is also provided.

The invention provides a double-linear track detecting method of a refraction effect of a two-dimensional photonic quasi-crystal wedge lens, which relates to a double-linear track detecting method. According to the invention, the double-linear track detecting method comprises the following steps of: arranging two linear tracks parallel to a bevel edge of the two-dimensional photonic quasi-crystal wedge lens; and according to opposite positions of the two tracks and the bevel edge as well as maximum strength positions detected on the two tracks, determining a refraction angle and effective index of a refracted beam as well as an emission position and emission position offset of the refracted beam through a geometrical relationship and a refraction law, so as to determine the refraction effect of the two-dimensional photonic quasi-crystal wedge lens. The double-linear track detecting method provided by the invention can be applied to any electromagnetic wave and any two-dimensional N-fold quasi-crystal wedge lens. The double-linear track detecting method provided by the invention is suitable for the field of photonic crystals, in particular photonic quasi-crystals. Meanwhile, according to the invention, a problem that the refraction angle and the effective index cannot be accurately detected or calculated by the traditional single circular arc track detecting method is also solved.