10results about How to "Reduce sample preparation time" patented technology

The invention belongs to the technical field of fiber size measurement, and particularly relates to a method for measuring the length of fibers in a fiber reinforced thermoplastic composite material. Mixing and diluting the fiber reinforced thermoplastic composite material and thermoplastic resin to obtain a diluted material, pressing the diluted material to obtain a test sample strip, cutting the test sample strip into a sample wafer, and measuring the length of the fiber in the sample wafer under an optical microscope; wherein the fiber reinforced thermoplastic composite material is prepared from matrix resin and reinforced fibers, and the matrix resin is the same as thermoplastic resin. According to the invention, the problems of poor measurement result accuracy and reproducibility and low measurement efficiency of the existing fiber length measurement method for the fiber reinforced thermoplastic composite material are solved.

The invention discloses a cast iron product white cast sample preparation mold and a method for manufacturing a white cast sample, the cast iron product white cast sample preparation mold comprises a metal outer mold with an assembly cavity and a metal inner mold which is installed in the assembly cavity and is in clearance fit with the assembly cavity, and a mold cavity is formed in the metal inner mold; the cavity comprises a pouring opening distributed in the first end of the metal inner mold and a forming groove formed in the end face, away from the pouring opening, of the metal inner mold and communicated with the pouring opening, the end opening of the forming groove abuts against the assembling cavity, the depth of the forming groove does not exceed 2 mm, the diameter of the forming groove does not exceed 30 mm, and the end opening of the forming groove abuts against the assembling cavity. By means of the sample preparation mold, the white cast part can be machined through quenching under the condition that cutting and grinding are not conducted, the sample preparation time is saved, the sample preparation steps are simplified, and on-the-spot analysis can be rapidly and efficiently completed.

The invention relates to the technical field of metallographic analysis of metal samples, in particular to a corrosion detection method for zinc dross in hot galvanizing zinc liquid, which comprises the following steps: longitudinally cutting a zinc liquid block sample obtained by sampling and cooling the zinc liquid to expose a polished surface; a polishing and grinding machine is used for polishing the polished surface, water is added in the polishing process, the water flow is 100-500 mL / min, the polishing temperature is maintained at 20-60 DEG C, and zinc liquid defect judgment is conducted on the middle-upper area of the polished surface under a microscope after polishing. By using the method provided by the invention, a good metallographic corrosion effect can be achieved by adding water during polishing instead of performing metallographic corrosion on the sample by using a conventional acidic corrosive liquid, heating zinc and water to react, and not reacting zinc slag with water, and the condition of over-corrosion is avoided. And the corrosion detection method provided by the invention is low in cost and low in risk, metallographic corrosion of the sample is completed while polishing is carried out, and the efficiency of detecting the quality of the zinc liquid in the production process of the hot-galvanized automobile outer plate is improved.

The invention discloses a preparation method of a section sample. The preparation method comprises the following steps: step 1, forming a first mark for coarse positioning; 2, measuring the relative distance between the first mark and the target structure on the chip sample; and step 3, forming a plurality of FIB marks for fine positioning according to the relative distance, wherein the FIB marks comprise a second mark, a third mark, a fourth mark and a fifth mark. The second mark and the third mark extend in the Y direction and are distributed on the two sides of the target structure in the X direction. The fourth mark extends in the X direction and is located at a first presentation distance on an upstream side in the Y direction of the target structure. The fifth mark comprises a flush structure flush with the X-direction extension section of the target structure, and a first straight line and a second straight line which are connected with the flush structure and located on the upstream side of the flush structure. And step 4, performing sample preparation and grinding, namely grinding until a fourth mark is observed. And grinding is continued until the flush structure of the fifth mark is observed. According to the invention, efficient fixed-point preparation and efficient fixed-point analysis of the section sample can be realized.

The present invention relates to a device and method for preparing an original soft clay sample by low-position vacuum loading combined with pre-pressing, the device comprises a model box system and a vacuum pump system; the model box system comprises a model box and a stack of carrier plates, a sealed top cover is arranged on the top of the model box for sealing the model box, and an air extraction hole is arranged on the side wall of the model box at a certain distance from the bottom of the model box; a cross-shaped vacuum filter tube is arranged at the bottom of the model box; a plurality of plastic drainage belts are arranged closely to the inner wall of the model box; any end of the vacuum filter tube is connected to the air extraction hole, and the other end is closely to the bottom of the plastic drainage belt; the vacuum pump system comprises a water ring vacuum pump with a water vapor separation box; the water ring vacuum pump is connected to the air extraction hole on the model box through an air extraction pipe. The method is to inject mud into the model box, first drain and consolidate under the action of dead weight, and then vacuum consolidate to obtain the original soft clay sample. The method of the present invention can ensure the uniformity of sample moisture content, density and strength.

The present invention provides a device for measuring water permeability coefficient of building concrete, which relates to the field of test detection, and includes: a measuring body; a water volume regulating hand wheel, which is rotatably connected to the top front end surface of the measuring body; a water inlet pipe, which is provided with a plurality of pieces, and the plurality of pieces of water inlet pipes are arranged in a circular array on the inner side of the top of the measuring body, and one group / multiple groups of water inlet pipes of the plurality of groups of water inlet pipes are respectively connected to the external water inlet pipe; a water inlet speed regulating mechanism, which is arranged on the inner side of the upper part of the measuring body; a water collecting measuring cylinder, which is arranged on the lower part of the measuring body; a clamping driving member, which is fixedly connected to the inner side of the rear part of the measuring body; and a measuring clamping transmission assembly, which is arranged inside the measuring body. No special samples are required, and the sample preparation time can be greatly reduced, the detection speed is greatly improved, and the problem of a long sample preparation process time is solved.

The invention discloses an FIB sample seat of a rotatable net carrying table, which comprises a base and a net carrying support, and the base is provided with a nail table hole and a groove; the net carrying support is located at the front end of the groove, and a rotary button is arranged at the top of the groove. The groove and the grid carrying support are used for fixing the grid carrying table, the grid carrying support rotates to drive the grid carrying table to rotate, and the grid carrying table and a sample can be switched from a horizontal state to a vertical state, so that FIB reverse cutting operation can be carried out under one-time sample injection, the operation of breaking vacuum and changing samples in conventional FIB reverse cutting is reduced, the FIB reverse cutting step is simplified, and the FIB reverse cutting efficiency is improved. The TEM sample preparation time is shortened, and the sample preparation cost is saved.

According to the ceramic capacitor grain size measurement method based on ion beam sample preparation and imaging, clear grain morphology is obtained by carrying out mechanical grinding and polishing sample preparation and ion beam polishing on a ceramic capacitor sample, so that accurate measurement of the grain size is realized, and the method has important significance in improving the performance and reliability of the ceramic capacitor. The method can be popularized and applied to other fields needing grain size measurement, and has a wide industrial application prospect.

This application relates to the field of semiconductor technology and provides a method for preparing and analyzing high-power bare chip failure analysis samples. The method includes: fixing the back surface of the high-power bare chip under test to the patch area of ​​a carrier substrate; wire bonding the functional electrode area on the amorphous back surface of the chip to the lead pads of the carrier substrate; preparing a polymer encapsulation layer on the amorphous back surface to obtain a molded high-power bare chip; peeling the molded high-power bare chip from the patch area of ​​the carrier substrate; grinding, fine polishing, and thinning the back surface to obtain the target failure analysis sample; powering the target failure analysis sample by connecting the lead pads outside the back surface area; observing the back surface area of ​​the target failure analysis sample to determine the failure location. This application not only avoids high-power bare chips being broken down or burned by high voltage and high current in failure analysis scenarios, but also significantly improves the sample preparation efficiency and quality of high-power bare chip failure samples.

The present invention relates to the technical field of ball milling equipment, and specifically discloses a fully automatic planetary mixing coating machine device and a control method, including a shell; a degassing mechanism; a first rotating mechanism; a second rotating mechanism; a ball mill shell, fixedly connected to the second rotating mechanism; a clamping mechanism, fixedly connected to the ball mill shell; a ball mill jar, detachably mounted on the clamping mechanism, the ball mill jar having an upper opening and a lower opening; a viscometer; a cover mechanism, the cover mechanism is arranged in cooperation with the upper opening and the lower opening, and is used to control the opening and closing of the upper opening and the lower opening; a filtering mechanism, fixedly connected to the lower opening; a coating mechanism, arranged at the bottom of the shell, and the coating mechanism is located at a corresponding position of the filtering mechanism. The uniformity of the slurry is ensured, and the viscosity of the sample is detected at the same time, the sample can be filtered conveniently and quickly, and the coating can be directly performed, which effectively shortens the sample preparation time and improves work efficiency.