138 results about "Composite sample" patented technology

The invention discloses a detection method for the interface bonding strength of an aluminum-steel composite material. The detection method comprises the following steps: cutting a rolled aluminum-steel composite sample into wafer samples, selecting or preparing two metal rods of which the diameters are the same as those of the wafer samples, and cleaning the wafer samples and the to-be-bonded surfaces of the metal rods; then, grinding the to-be-bonded surfaces; next, respectively bonding the aluminum-steel surface of each wafer sample with one end surface of one of the two metal rods by using epoxy resin AB glue, and standing for over 24 hours at normal temperature to prepare specimens; and finally, performing a peeling test on the specimens on a stretching machine and calculating the interface bonding strength of the aluminum-steel composite material. The invention provides the feasible method for the quantitative measurement on the interface bonding strength of an ultrathin metal composite material. According to the method, the specimens are prepared easily and conveniently; by adopting the method, the interface peeling fastness of the aluminum-steel composite material can be accurately detected, and the interface bonding strength of the aluminum-steel composite material for brazing can be quantitatively represented.

The invention relates to a method for treating the waste, in particular to a sludge high-pressure three-phase separating method, comprising the following steps that: an oil sludge composite sample to be separated is tested, added with a dehydrating agent and additives according to the oil sludge test result and then mixed evenly; the oil sludge after the pretreatment undergoes three-phase separation in a high-pressure three-phase separator, pressure filtration is carried out under the high pressure of between 10 and 50 MPa, the filtrate is collected; when no filtrate flows out, the pressure is relieved and the material is discharged, the water content of the treated oil sludge can reach between 10 and 20 percent; the collected filtrate undergoes oil-water separation, the sewage is sent to a sewage treatment system for water treatment; waste oil can be comprehensively utilized after treatment; and filter residue can be taken as industrial secondary fuel to be comprehensively utilized. Compared with other oil sludge treatment technologies, the method has the characteristics of high separation efficiency, no secondary pollution, simple and convenient operation flow, high reliability, strong practicability and so on, and has obvious social benefits and economic benefits.

The invention relates to a method for quantitatively evaluating orientation degree of short fiber reinforced composite fibers, which is characterized by selecting and determining a sectioning surface and sectioning a composite sample; acquiring a micrograph via an optical microscope or a scanning electron microscope; repainting the elliptic fiber section in the micrograph in graphic image software; extracting the lengths of long axis and short axis and an angle between the elliptic long axis and a coordinate axis in the repainted picture; calculating the direction vectors of the fibers corresponding to the ellipses according to the extracted parameters of the elliptic section; and calculating the parameters of the orientation degree of the composite along a specific direction. According to the method, the proper sectioning surface is selected so as to eliminate the calculation errors caused by condition that the same elliptic section corresponds to two fiber directions. In addition, a calculated mode given by the method considers the probability of sectioning the fibers, and the calculating result is more accurate in comparison with the calculated mode which does not consider the probability of sectioning the fibers.

The invention discloses a preparation method of a graphene-ceramic composite material. The preparation method comprises the following steps of: (1), penetrating cerate (or zircon salt), auxiliaries and graphene oxide through alcohol dissolving auxiliaries, ultrasonically dispersing the materials uniformly for co-decomposing into metal oxides to obtain a composite material; (2), adding organic adhesive solvent to the graphene-metal oxide composite material for sufficiently mixing and grinding; pressing the mixture into a strip-shaped composite sample by adopting a dry-press process, placing the composite sample in a vacuum tube furnace; and controlling the sintering condition by ventilating a gas mixture of a certain proportion, cooling to the room temperature to obtain the graphene-ceramic composite material. The preparation method of the graphene-ceramic composite material disclosed by the invention can be used for improving the dispersibility and cycling stability of ceramic oxide particles, increasing a three-phase interface among the ceramic oxide particles and improving the electrochemical activity of the composite material, so that the ceramic material has the advantages of being low in density, high in strength, excellent in oxidation resistance, thermal scouring resistance, corrosion resistance and the like.

A multi-carrier transmitter capable of transmitting on one or multiple frequency channels simultaneously is described. In one design, the multi-carrier transmitter includes at least one processor and a single radio frequency (RF) transmission chain. The processor(s) may generate output chips for each of multiple frequency channels, digitally filter and upsample the output chips for each frequency channel to obtain filtered samples, and digitally upconvert the filtered samples for each frequency channel to a different frequency to obtain upconverted samples. The processor(s) may then combine the upconverted samples for the multiple frequency channels to obtain composite samples, perform pre-distortion on the composite samples for I/Q mismatch compensation, and upsample the pre-distorted samples to obtain output samples. The output samples may be converted to an analog signal with a wideband DAC. The RF transmit chain may process the analog signal to generate an RF output signal.

A testing method of terbia content is provided, which firstly makes generatrix, terbia and water mixed to get a series of composite samples, and then dries and presses to a series of samples. According to the series of standard samples, standard curve is made. The procedures are as follows: the intensity of the character line of analyzed element terbium is measured by the X Rays fluorescence analysis to the prepared series of standard samples, and the density of the known element in intensity value and standard samples are fitted into a smooth curve, namely the standard curve; according to standard curve, the test value of the sample is counted, which means that simultaneously, the intensity A of the character line of analyzed element terbium are measured. Then the intensity is fit on the best standard curve, according to the intensity value A of the tested element, and the terbium content of the sample can be obtained from the standard curve formula A equals to f(c). By using the method, the measuring time is short, the precision is high, and the invention can quickly and accurately make feedback of the quality information, which is an accurate, convenient and quick testing method.

The invention relates to a PLA absorbable bone screw with PBC as a toughening agent, and a preparation method thereof. The bone screw is a screw prepared from a composite material, wherein the composite material is a blend of a substrate material PLA, a toughening agent PBC, and an additive HAP. The preparation method comprises the steps that: (1) PBC, PLA, and HAP are respectively bake-dried, such that water content is removed; (2) the dried PBC, PLA, and HAP are heated and blended according to a certain ratio; and a cylindrical PBC/PLA/HAP composite sample bar is obtained by injection molding; (3) the composite sample bar is stretched under hot air; and (4) the stretched sample bar is subjected to cutting machining, such that a screw is prepared, wherein the screw is the PLA absorbable bone screw with PBC as the toughening agent. The bone screw provided by the invention has excellent mechanical performances and good biocompatibility, such that re-injury to patient caused by secondary operation is avoided. The degradation product of the product provided by the invention causes no toxicity or harm. The preparation method is simple and is suitable for industrialized productions.

The invention discloses a spectro-detecting system, which is characterized by the following: realizing synchronous multi-group detection for multiple samples in the composite sample library through different frequency optical sources; containing variable frequency or utility serial filtrate light source, detecting plate with M*N transmission sample pools (M and N is between 2 and 100 or more) and high-resolution CCD digital detector for device (as picture displays); detecting transmission information through high-resolution CCD digital camera; calculating the density of specific material in kinds of samples according to background and data through self-designed software; analyzing quantatively for hundreds of samples within several seconds for combined chemical samples.

The invention discloses a method for measuring the elastic modulus of a coating. When the coating is a single-layer coating, the method comprises the following steps: acquiring the elastic modulus Eq of a coating composite sample to be measured; acquiring the elastic modulus Es of a matrix material of the coating sample to be measured; respectively acquiring the thickness H of the matrix of the coating sample to be measured and the thickness h of the coating; and calculating the elastic modulus Ec of the coating of the coating sample to be measured according to a formula shown in the description, wherein A in the formula is h<4>, B in the formula is 4EsHh<3> + 4EsH<3>h + 6EsH<2>h<2> - Eq(H+h)<3>h, and C in the formula is Es<2>H<4> - EqEsH(H+h)<3>. The method uses a pulse excitation technology to realize rapid and accurate measurement of the elastic modulus of the coating sample.

The invention discloses an aerobic composting stink in-situ monitoring device and an operation method thereof. The aerobic composting stink in-situ monitoring device comprises an aerobic composting system, a stink gas in-situ control system, a stink gas online monitoring system and an environmental condition online monitoring system. The device can be used for composting raw materials and auxiliary materials in different kinds, different technological parameters or a stink self-circulation mode is adopted, and efficient low-cost stink in-situ control research in the aerobic composting process is carried out; the composting stink pollution in-situ control effect can be monitored online, and the stink in-situ control operating process can be adjusted according to a monitoring result; compositing samples can be collected, the changing law of the compositing physical and chemical properties is researched, ecological analysis of pile body microorganisms becomes possible, and activity optimization and regulation and control of deodorization relevant microorganisms in a pile body are further achieved.

The invention discloses preparation and application of a palygorskite/graphite phase carbon nitride compound composite material. The preparation method of the pal/g-C3N4 composite material includes: subjecting palygorskite to ultrasonic dispersion in distilled water, adding dicyandiamide and mixing the substances evenly, and then performing ultrasonic treatment for 0.5-1h; conducting heating to 45-50DEG C, and further performing stirring till complete dryness by evaporation, conducting grinding into powder, placing the product in a muffle furnace, and conducting calcination at 520-550DEG C for 3.5-4h; performing cooling to room temperature, and then conducting grinding into powder, thus obtaining the pal/g-C3N4 composite material. The invention adopts water bath method to compound dicyandiamide and palygorskite to successfully prepare the pal/g-C3N4 composite material, the catalytic activity of g-C3N4 is combined with the adsorption performance of palygorskite, and the two substances cooperate to enhance the light absorption intensity of the composite sample, thus improving the photocatalytic efficiency, and reaching the effect of efficient removal of pollutants. Experiments show that the composite catalytic material has high catalytic oxidation rate on tetracycline hydrochloride, and the total removal rate reaches 85%.

Composite sampling of a fluid flowing through a conduit includes collecting, in a vessel coupled to the conduit through which the fluid is flowing, a first discrete sample of fluid from the conduit, the first discrete sample having a first selected volume, and collecting, in the vessel and at a first interval from the first sample, a second discrete sample of the fluid from the conduit, the second discrete sample having a second selected volume, thereby forming a composite sample in the vessel while the vessel is coupled to conduit. The composite sample includes the first discrete sample and the second discrete sample, and may include one or more additional discrete samples. An apparatus for collecting the composite sample includes a gas chromatograph, and is arranged such that the composite sample is provided to the gas chromatograph without removing the composite sample from the apparatus or transporting the composite sample.

A method for establishing a two-dimensional stochastic pore model of fiber reinforced composite with large dispersion pore sizes belongs to the field of composite nondestructive examination and evaluation. The method for establishing the model includes steps as follows: firstly dissecting a to-be-tested composite sample, counting the porosity and size characteristics of all pores through the metallographic method, grading the pores according to pore lengths, and establishing stochastic pore models of each grade; comparing the models with counting results, obtained through the metallographic analysis, of pore size characteristics of each grade, and obtaining the stochastic pore models of each grade as long as the difference between the models and the results are less than 2%; and finally, superimposing model images of the pores of each grade to obtain a stochastic pore model of the to-be-tested sample. The method can accurately establish the two-dimensional stochastic pore model of the fiber reinforced composite with the large dispersion pore sizes; and further, by utilizing the model, the base for the ultrasonically nondestructive examination of the composite porosity can be provided, and the model base for analyzing the performances of the composite can be provided.

The invention relates to a preparation method of an aluminum steel composite grain structure, a sample, a reagent and a preparation method. The preparation method of the grain structure comprises the steps that an aluminum steel composite sample is prepared; an aluminum side grain structure is prepared, wherein the composite sample is subjected to electrolysis for 1-3 min at constant potential (-1.0 V)-(-0.7 V) in 0.5%-2.5% parts by weight of hydrofluoric acid aqueous solution electrolytic solution at the temperature ranging from 50 DEG C to 70 DEG C; a steel side grain structure is prepared, wherein the composite sample subjected to electrolysis is wiped and cleaned for 30-60 s with a room-temperature nitric acid ethanol solution containing 1.0%-2.5% parts by weight of nitric acid; the aluminum steel composite sample is prepared through grinding through 200-400#, 500-700# and 1,000-1,400# waterproof abrasive paper in sequence and polishing. According to the technical scheme, the grain structures of the two sides of the aluminum steel composite can be displayed simultaneously, and observation and measurement of a composite metallographic structure are more convenient, rapid and efficient.

The invention discloses a method for measuring elastic modulus of a pipe coating. The method comprises the following steps that the elastic modulus Es of matrix of a composite sample to be measured is measured by a gap-ring method; the composite sample to be measured is processed to a gap-ring sample, the gap is formed in the middle of the sample height, and the gap-ring sample of the composite sample is compressed and loaded, the increasing amount of the load delta P and the variable quantity of the compression displacement delta Delta within the online elastic range are recorded; the derived analytic expression of Es, delta P, delta Delta and alpha is used to calculate the ratio alpha of the coating elastic modulus Ec and the matrix elastic modulus Es, and then the coating elastic modulus Ec is obtained according to the equation Ec=alpha*Es. The method is simple in operation, convenient and efficient, and has great practical value and broad application prospect in the engineering field of pipe coating surface technology.