73 results about "Microstructure morphology" patented technology

The invention provides a method used for determining Bravais lattice of unknown crystal by electron backscatter diffraction. The invention is characterized in that the method comprises the steps as follows: 1) an electron backscatter diffraction spectrum is obtained and the crystal diffraction information in the diffraction spectrum is measured; 2) a two-dimensional reciprocal surface of the crystal is obtained; 3) a three-dimensional reciprocal primitive cell is reconstructed by the two-dimensional reciprocal surface; 4) the cell parameter of the three-dimensional reciprocal primitive cell s worked out according to the width of the Kikuchi band and the angle between the Kikuchi bands in the same Kikuchi electrode; 5) a reciprocal reduced cell of the crystal is solved; 6) the Bravais lattice of the crystal is determined in the reciprocal space; 7) the Bravais lattice of the crystal is determined. In the method, only a scanning electron microscope and an electron backscatter diffraction accessory are used to realize the analysis on unknown lattice of bulk crystals, and the exponential of the Kikuchi band and the Kikuchi electrode in the electron backscatter diffraction spectrum is marked at the same time. The method has no special requirement on the samples to be analyzed, is suitable for quickly analyzing bulk samples, and can be used for analyzing the microstructure morphologies and crystal structure in the buck samples.

The invention discloses a method and device for measuring microstructure morphology based on spectral modulation depth coding. An element to be measured and a spatial light modulator are conjugated atthe center wavelength of the spectral range used in the measurement; a beam folding coupler, the spatial light modulator, a collimating and expanding lens, a beam splitter, an axial non-achromatic microscope objective lens, an imaging lens and a color camera are in a common optical path structure. During the measurement, the pre-calibration of the corresponding relation of the 'spectral-depth' isfirstly carried out on a system device, and each frame monochromatic shift-phase fringe pattern reflected by the element to be measured is acquired by a measuring device, so as to obtain the modulation depth distribution of each monochromatic light fringe pattern related to the surface shape of the element to be measured, and the coded image is obtained; the 'spectrum-modulation depth' relation curve of each point on the surface to be measured is determined by using Gaussian, quasi-Gaussian or spline model fitting, the depth information of each point on the surface to be measured is demodulated, and the fast and precise measurement of the microstructure topography of the three-dimensional topography distribution of the element to tested, without mechanical scanning or contact, is completed.

The invention relates to an electromagnetic friction stir spot welding device which comprises a welding cushion block, a stirring head, a stirring needle, a clamping sleeve, a stirring sleeve, a first excitation coil, a second excitation coil, a power transformation device and a displacement sensor, wherein the stirring needle is arranged at the inner layer of the stirring head, the clamping sleeve is arranged at the outer layer of the stirring head, the stirring sleeve is arranged between the stirring needle and the clamping sleeve, the first excitation coil and the second excitation coil are respectively arranged on the clamping sleeve and the welding cushion block and are symmetrically distributed, the power transformation device is electrically connected with the first excitation coil and the second excitation coil, and the displacement sensor is electrically connected with the stirring sleeve and the power transformation device. According to the electromagnetic friction stir spot welding device, the power transformation device provides a strong magnetic field for welding materials in a molten state in a pressing-in stage, a refilling stage and a forging and pressing process, and thus the plastic flow capacity of the welding materials in the molten state is remarkably improved, the welding condition of a joint is improved, a re-crystallized grain is further refined, the microstructure morphology of a spot welding joint is improved, and the quality of the spot welding joint is improved.

The present invention discloses a qualitative detection method for the cold roller surface micro linear defect. According to the qualitative detection method, ultrasonic surface wave and magnetic particle inspection is adopted to detect the cold roller surface; the micro linear defect is positioned by using a metallurgical defect positioning scale; the defect part is subjected to coarse grinding, fine grinding and polishing with sand paper and is corroded, the morphologies of the linear defect and the microstructure surrounding the linear defect are copied by using acetate fiber paper, and the defect is marked so as to complete the preparation of the defect morphology copying sheet; the defect morphology copying sheet is subjected to vacuum carbon spraying, the microstructure morphology of the defect is observed under a microscope, the change of the microstructure close to the defect is observed, and the characteristics of the defect morphology and the surrounding microstructure morphology are recorded; and according to the micromorphology characteristic of the micro linear defect and the characteristic of the microstructure surrounding the defect, the character of the roller surface linear defect is qualitatively judged. With the detection of the present invention, the qualitative judgment can be performed on the cold roller surface micro linear defect, such that the cold roller subsequent grinding treatment is convenient, the cold roller service accident is avoided, and the cold rolling quality of the plate is ensured.

The invention discloses a synchrotron radiation in-situ imaging tensile testing machine simulating multiple environments and a testing method thereof and belongs to the field of material tensile testing machine. The material tensile testing machine comprises a rotatable single-pull base, wherein a digital display pull and push dynamometer is arranged above the single-pull base and is fixedly connected with the lower portion of a lower clamp, the upper portion of an upper clamp is fixedly connected to a sleeve, a spring and a sleeve shaft are arranged in the sleeve, the top of the sleeve shaft is connected to the loading connection position of a loading mechanism, and the loading mechanism is provided with a ratchet wheel and a pawl for achieving a self-locking function. The testing machine is further provided with an in-situ imaging system, a humidification device and a temperature control device. The testing machine reasonably applies a dynamical tensile test and a synchrotron radiation imaging technique and conveniently obtains a three-dimensional image of the inside of a material, microstructure change and microcosmic deformation damage of material organization under complicated environments such as high temperature, low temperature, high humidity and rich oxygen can be obtained, and the microstructure morphology and defects of the material can be better observed.

The invention discloses a nitrogen and boron co-doped porous carbon material. The nitrogen and boron co-doped porous carbon material is prepared by taking glucose, melamine and boric acid as raw materials, preparing a nitrogen and boron precursor after reaction and then performing calcination and activation. The specific surface area of the nitrogen and boron co-doped porous carbon material is (1,027-1,432) m<2> g<-1>, the average pore size distribution is 1.686-3.826 nanometers, and the micropore content accounts for 77-81%. The preparation method comprises the steps of 1) preparing the nitrogen- and boron-containing precursor; 2) activating the nitrogen- and boron-containing precursor; and 3) performing post-processing on the nitrogen- and boron-containing precursor. When the nitrogen and boron co-doped porous carbon material is used as a supercapacitor electrode material, the specific capacitance value is 230-309 F g<-1> when the current density is 0.5A G<-1>. The melamine has a unique and rich macropore framework structure, the microstructure morphology of the material is controlled, porous microstructure morphology in a honeycomb shape similar to cheese and with thick slice structure is obtained, so that the nitrogen and boron co-doped porous carbon material has favorable electrochemical performance. The nitrogen and boron co-doped porous carbon material has wide application prospect in the field of a supercapacitor, a fuel cell and the like.

The invention relates to an assembly method of a microstructure pressing triple prism made from PMMA polymer material. The method comprises the following steps: welding a flat glass plate on the bottom surface of a PMMA pressing triple prism by an ultrasonic welding technology to enable the bottom surface of the PMMA pressing triple prism to be fixed on the flat glass plate; cutting the flat glass plate fixed on the PMMA pressing triple prism by a diamond cutting machine, wherein a free boundary exceeds the outline of the PMMA pressing triple prism; etching an assembly line on the inner layer of a lens of a common spherical mirror needing to be installed, wherein the assembly line is the same as the contour line of the flat glass plate; aligning a microstructure morphology layer of the PMMA pressing triple prism to the inner layer of the common spherical mirror, and welding the flat glass plate provided with the PMMA pressing triple prism on the assembly line by an ultrasonic welding technology; and carrying out edge polishing treatment.

The invention belongs to the technical field of metal material metallographic etching, and particularly relates to a metallurgical analysis etching method of layered metal composite material. The metallurgical analysis etching method employs electrolytic etching and chemical etching methods in order; and the microstructures of alloy components with different corrosion resistant performances in the layered metal composite material are displayed simultaneously, so as to analyze the phase composition, microstructure morphology, interface structure and grain size of components in each layer of the layered composite material.

The invention discloses a flat pressing manufacturing method of a bionic adhesion structure based on a micro-via nickel-based mold. The method includes the steps of: preparing a nickel-based mold withan array of micro-vias; placing the nickel-based mold on an elastic liner in a magnetic assembly system; uniformly coating a backing with liquid prepolymer, and placing the side, coated with the liquid prepolymer, of the backing on the nickel-based mold; dividing a cavity into an upper cavity and a lower cavity by a sealing diaphragm, and uniformly pressing a backing layer by vacuumizing the lower cavity and inflating the upper cavity so as to achieve full filling of prepolymers with different viscosities; after completing filling, conducting curing and demolding, and obtaining the bionic adhesion material. The method contributes to the realization of an integrated molding process of a structure with a large depth-to-diameter ratio and an enlarged end; and the magnetic force-induced assembly system is combined with an electrochemical modification technology of the nickel-based mold to realize the omnidirectional controllable adjustment of the microstructure morphology of the bionic adhesive material. The method helps to improve the universality of the micro-nano imprint manufacturing technology for complex structures.

The invention relates to scenedesmus capable of highly yielding oil as well as a culture method and application thereof. An alga variety separated from a eutrophic water region is subjected to 18S rDNA sequence analysis and microstructure morphology identification so that the alga is determined as the member of Scenedesmus sp. and the sequence number is KF999043. The alga strain is named as Scenedesmus quadricauda SDEC-8 and is preserved in China Center for Type Culture Collection on October 8, 2014; and the preservation number is CCTCC NO: M2014448. An oil production culture method comprises the following steps: separating single alga cells of the Scenedesmus quadricauda SDEC-8 and carrying out aeration enlarged cultivation on obtained pure cells under laboratory conditions. The Scenedesmus quadricauda SDEC-8 contains rich high-quality oil; and the oil content can be up to 31.8% of the dry weight of the cells and the content of saturated fatty acids in fatty acids can be up to 80%, so that the Scenedesmus quadricauda SDEC-8 can be used as the raw material of biodiesel. Based on a high cetane number (61.38) and a low iodine number (29.38gI2/100g), the biodiesel prepared by taking the microalga as the raw material has good oxidization stability.

The invention belongs to the technical field of material characterization, and especially relates to an apparatus for highly-efficiently reconstructing the three-dimensional microstructure morphology of a material, and a reconstruction method thereof. The problem of time and labor consuming and low efficiency existing in the prior art are solved in the invention. The apparatus comprises a metallographic microscope, a camera, a sample clamping assembly and a polishing assembly, the metallographic microscope is inverted, the camera is an autofocus camera, the sample clamping assembly comprises a supporting rod capable of rotating in a horizontal direction and a clamp movably arranged at the end portion of the supporting rod, and the polishing assembly comprises a supporting rack capable of rotating in the horizontal direction and a polishing disc horizontally arranged on the supporting rack; and the clamp opens up and down, the cross section of the clamp has a noncircular shape, a sample with a noncircular cross section is clamped in the clamp, a balancing weight is arranged on the upper end surface of the sample, at least one radial dimension of the cross section of the clamp is smaller than the radial dimension of the cross section of the balancing weight, and the lower end surface of the sample and the disc surface of the polishing disc are located in the same horizontal plane.

The invention discloses a synchrotron radiation in-situ imaging fatigue testing machine comprising a temperature control mechanism and a testing method of the synchrotron radiation in-situ imaging fatigue testing machine, and belongs to the field of fatigue testing machines. The synchrotron radiation in-situ imaging fatigue testing machine comprising the temperature control mechanism comprises a base and a top cover, wherein the bottom of a bottom plate is inlaid in a synchrotron radiation light source platform in a cross manner; a clamping mechanism is arranged on the cylindrical base of the synchrotron radiation light source platform; and the temperature control mechanism is arranged between the base and the cylindrical top cover. The testing method comprises the following steps: clamping a sample between an upper clamp and a lower clamp; then fixing an inner enclosure and an outer enclosure well; feeding temperature control air flow and nitrogen to the inner side and the outer layer of the inner enclosure of the testing machine to control the temperature of the sample and prevent water spray from being produced on the enclosure; and then starting a servo motor, applying vertical reciprocating loading to the sample, and acquiring pressure by using a load sensor. The testing machine can analyze fatigue properties of the sample at different temperatures, and microstructure morphology and defects of a material can be observed well.

The invention relates to ceramic phase reinforced refractory high-entropy alloy composite materials and a preparation method thereof, and belongs to the technical field of material science and engineering. A series of ceramic phase reinforced refractory high-entropy alloy composite materials are prepared by adding a ceramic phase and using a non-consumable vacuum arc melting furnace. The preparation method is simple in process and convenient to operate; and the alloy is of a single BCC structure, the microstructure morphology is mainly dendritic crystals, interstitial atoms are introduced while a nanometer second phase is introduced, so that the average grain size is obviously reduced compared with a matrix refractory high-entropy alloy, the room-temperature and high-temperature mechanical properties are obviously improved, and the alloy has excellent high-temperature structure stability at the temperature of 800 DEG C. According to the ceramic phase reinforced refractory high-entropy alloy composite materials and the preparation method thereof, the service temperature of mechanical engineering equipment and parts can be obviously improved, the ceramic phase reinforced refractory high-entropy alloy composite materials are expected to replace nickel-based superalloys, and have a wide application prospect in the fields of aerospace, traffic transportation, petrochemical industry, mechano-electronics, automobile manufacturing and the like.

The invention discloses a performance determination method for an anti-coking coating of a boiler heating surface tube, which comprises the steps of 1) measuring the coating thickness, and determining the coating thickness uniformity; 2) carrying out microstructure morphology inspection on the coating, and determining the micro-morphology and the phase structure; 3) performing a thermal shock test on the coating, and determining the cold-hot alternating resistance capacity of the coating; 4) testing heat transfer characteristics of the coating; and 5) performing a coking and slagging test in a test platform, and determining the coking and slagging resistance performance of the coating under a laboratory condition. The method disclosed by the invention can comprehensively determine anti-coking effects of the coating, provides a determination system for authenticating the performance of the anti-coking coating, and is simple and reliable.

The invention discloses a method for determining performance of a high-temperature sulfur corrosion prevention coating of a water-cooling wall of a boiler. The method comprises the following steps: (1) analyzing chemical constituents of raw materials of the coating, and testing alloy ingredients and contents of the raw materials; (2) measuring the thickness of the coating, and determining the thickness uniformity of the coating; (3) carrying out energy spectrum analysis and microstructure morphology testing on the coating, and determining micromorphology, porosity and phase composition; (4) testing the bonding strength of the coating, and determining the bonding strength of the coating and a water-cooling wall tube; (5) carrying out thermal shock test on the coating, and determining temperature cycling resistance of the coating; (6) carrying out high-temperature sulfur corrosion test on the coating, and determining the comprehensive performance of the high-temperature sulfur corrosion prevention coating; and (7) carrying out thermal transfer characteristic test on the coating. By the method, the high-temperature sulfur corrosion prevention effect of the coating can be evaluated comprehensively, and a determining system for identifying the performance of the high-temperature sulfur corrosion prevention coating is provided and is simple and reliable.

The invention relates to a method for preparing a large-size micro-groove bionic antifouling coating by a template imprinting method. The method comprises the following steps that a specific bionic microstructure morphology is etched on a plane template or a roller template through laser, the microstructure template is coated with a release agent, then the bionic microstructure template is directly imprinted on the surface of a surface-dried antifouling coating to be subjected to overturning and forming, the bionic antifouling coating with the microstructure morphology is obtained, and then the bionic antifouling coating with the large-area microstructure is prepared through multiple times of imprinting of the microstructure plane template or continuous rolling imprinting of the microstructure roller template. The method can be carried out under the room temperature condition, the requirement for preparation conditions is low, operation is easy, and preparation of the large-area coating microstructure surface can be achieved; and the prepared bionic antifouling coating has the advantages of uniform surface microstructure morphology, no crack, no shedding, and good antifouling effect.

The invention relates to the technical field of in-situ characterization of mechanical properties and microstructure of materials and provides an in-situ micro mechanical test board. The test board comprises a motor execution mechanism, a spring auxiliary loading mechanism, a position sensing mechanism, a force sensing mechanism and a base, wherein the motor execution mechanism is fixed on the base, rotation output of a motor around the axial direction is converted into linear motion of the spring auxiliary loading mechanism through steering and transmission, the spring auxiliary loading mechanism applies a load to a sample, the position sensing mechanism detects the relative position variation, namely the sample deformation quantity, of the spring auxiliary loading mechanism in real time,and the force sensing mechanism detects a stress value borne by the sample in real time. The test board is advantaged in that a clamp supporting frame and a lead screw nut pair are elastically connected in the axial direction of a lead screw, on the basis, a load oscillator is additionally arranged, so fatigue performance testing of the sample and in-situ characterization of the microstructure morphology, chemical components, the crystal structure and the phase structure information of the material under the action of the fatigue load can be realized, the structure is reasonable and compact,and fine control under a force control mode is facilitated.

The invention relates to a corrosive agent for Nb - Si material microstructure specimens and an electrolyte corrosion technique which belongs to metallographic analysis of physical metallurgy field. The invention uses solution of H3PO4 and H2O, and the volume is 98% H3PO4 : H2O is 1 to 99. The polished Nb - Si material is used as positive pole, and stainless as negative pole. Direct current source is used to process electrolyte corrosion, and then Nb - Si material microstructure specimens is made, and thus the composition phases and microstructure morphology of the Nb - Si material can be rapid and conveniently analyzed via an optical microscope.

The invention relates to a material performance testing device for a key nuclear material under a complex service environment, and belongs to the technical field of material performance testing. The material performance testing device is mainly composed of a machine frame module, a lifting device, a bend loading module, an in-situ observing module, a reaction kettle module and a stretch loading module. The material performance testing device disclosed by the invention can achieve stretching-bending combined load loading and coupled loading of a supercritical water strong oxidation corrosion environment, can more really simulate a real work condition of the in-pile key nuclear material of a supercritical water reactor, and can further research micro mechanical properties of the key nuclear material. According to the material performance testing device disclosed by the invention, a modularization design is utilized, and the in-situ observing module is integrated; thus, the material performance testing device has the advantages of simple structure, compact layout and the like, microstructure of a material surface can be monitored, a material corrosion behavior can be reflected in real time, and an effective testing method for researching internal relation between microstructure morphology and macro mechanical property of the material and an initiation and propagation law of a stress corrosion crack is provided.

The invention belongs to the technical field of wrought aluminum alloys and discloses a high-thermal-conductivity and low-expansion wrought aluminum alloy and a preparation method thereof. The wrought aluminum alloy comprises the following components in percentage by mass: 1.5-2.5% of Fe, 1.0-2.0% of Ni, 0-0.5% of Yb, 0-0.5% of Mg and the balance of Al, wherein Yb and Mg are not 0 at the same time; the wrought aluminum alloy is obtained by performing mechanical vibration casting on a melt; or after mechanical vibration casting is completed, annealing treatment and rolling deformation treatment are carried out. The invention further discloses a preparation method of the wrought aluminum alloy. According to the high-thermal-conductivity and low-expansion wrought aluminum alloy and the preparation method thereof, Yb and/or Mg compound modification and vibration casting are used for improving the microstructure morphology of the alloy; and multi-target balance optimization of the heat-conducting property, the thermal expansion coefficient and the mechanical performance of the alloy is achieved. The wrought aluminum alloy has high thermal conductivity, low expansibility and high mechanical performance.

The invention belongs to the technical field related to laser welding, and discloses a method for analyzing a microstructure nucleation mechanism of a laser welding seam. The method comprises the following steps: (1) performing laser welding, namely test welding, on a sample 1, and analyzing the microstructure morphology and distribution of the obtained laser welding seam; meanwhile, using TIG welding for conducting one-pass pre-welding and n-pass pre-welding on the sample 2-1 and the sample 2-2 correspondingly, then conducting test welding on weld joints formed through pre-welding correspondingly, and conducting metallographic representation on the obtained overlapped weld joints correspondingly; wherein the sample 1, the sample 2-1 and the sample 2-2 are made of the same material; wherein n is a positive integer greater than or equal to 3; (2) comparing the equiaxed crystal quantity and distribution of the laser weld joint and the overlapped weld joint area of the sample 1, and pre-identifying the nucleation mechanism of the weld joint according to the comparison result; and (3) performing confirmation according to the pre-identification result so as to analyze and obtain a nucleation mechanism. According to the invention, the accuracy and repeatability of a nucleation mechanism are improved.