Manufacturing method of high-contrast high-strength high-temperature resistant grid

Abstract

The invention discloses a manufacturing method of a high-contrast and high-strength high-temperature-resistant grating.The manufacturing method includes the steps that grating frequency is estimated, a process with a mask or a process without a mask is selected according to the grating frequency, an orthogonal grating with a certain groove depth and needed frequency is manufactured on the surface of a test piece through a laser marking machine, high-temperature-resistant nano-particles are selected and adsorbed to grooves in the surface of the grating of the test piece in a spraying mode, high-temperature-resistant nano-particles adsorbed to protruding parts of the grating are wiped away, and finally high-temperature sintering is carried out, so that the high-contrast and high-strength high-temperature-resistant grating is obtained.The manufacturing method is easy to implement and feasible, and the manufactured high-temperature-resistant grating is high in contrast, excellent in high temperature stability and suitable for deformation measurement in complex and hostile high temperature environments.

Description

technical field [0001] The application relates to the technical fields of photometric mechanics, engineering materials, component deformation and displacement testing, and specifically relates to a method for manufacturing a high-contrast, high-strength, high-temperature resistant grid. Background technique [0002] In aerospace, chemical energy and other industrial fields, many important components such as turbine engines and surface structures of supersonic vehicles will serve in high-temperature environments for a long time. However, because the high temperature environment is very harsh, it is difficult to apply the research methods at room temperature to high temperature. Therefore, most of the current research on the change of material properties at high temperature is in the qualitative research stage. Quantitative and accurate observation and measurement of the process can better study the material behavior characteristics of materials at high temperature and at norm...

AI Technical Summary

Problems solved by technology

The fabrication of high-temperature grids has always been a difficult problem, because deformed carriers available at room temperature will undergo many unexpected changes once they are exposed to high-temperature environments, such as shedding, discoloration, and structural damage, and photometry itself is based on the characteristics of deformed carriers. The above changes will seriously damage the characteristics of the deformed carrier, which will bring great troubles to the measurement and calculation.

GLCloud et al. (GL Cloud, M Bayer, Experimental Techniques, 1988(4): 24-27) sprayed ceramic high-temperature glue on the surface of the sample and then pressed a nickel mesh, and then waited for the high-temperature glue to solidify to make a high-temperature grid. Although the production method is simple, there are problems such as the timing of high-temperature glue curing is difficult to control, the success rate of production is low, and the ideal effect needs to be repeated. In addition, the grid is easily oxidized at high temperature, and the grid structure is easily damaged.

Zhu Jianguo et al. (Chinese patent application 200910135728.4) made high-temperature gratings by polishing the test piece, removing glue, etching, and coating. The grating frequency produced by this method is high, and the measurement sensitivity is high, but the process is more complicated and difficult, and the cost is higher. , the grating produced at the same time can only be protected by coating, it is easy to oxidize and change color at high temperature, which will greatly affect the contrast of the grating

Xie Huimin et al. (Chinese patent application 20130070717.9) fabricated high-temperature gratings on the surface of the sample by means of holographic grating fabrication, electroforming, embossing, coating, and transfer. This method improved the method of Zhu Jianguo et al. It can be transferred to produce high-temperature gratings, saving many processes and costs, and can be used for mass production, but the high-temperature resistance of the gratings has not been improved, and the coated film is still prone to oxidation and discoloration in high-temperature environments, which affects the contrast of the gratings.

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