Preparation method of 4D printing NiTi alloy EBSD sample polishing solution, product and application thereof

Abstract

The invention discloses a preparation method of a polishing solution, a product and application of the polishing solution, and the preparation method comprises the following steps: mixing fumed silica, urea hydrogen peroxide, chitosan oligosaccharide, citric acid and water, and carrying out ultrasonic stirring treatment for 10-20 minutes to obtain the polishing solution, wherein based on the mass percentage of the polishing solution, the content of the fumed silica is 4-15%, the content of the urea hydrogen peroxide is 4-15%, the content of the chitosan oligosaccharide is 0.5-4%, the content of the citric acid is 0.5-4%, and the balance is distilled water. According to the polishing solution, urea hydrogen peroxide is used as an oxidizing agent, so that the polishing solution has better stability, can be stored for a longer time, and can provide a more stable polishing effect in the polishing process; fumed silica is used as abrasive particles, and compared with common nano-silica, the fumed silica has higher purity and smaller particle size, and lower surface roughness can be provided in the polishing process; chitosan oligosaccharide has a chelation effect and a stabilization effect, and citric acid can improve the chemical activity of the polishing agent.

Description

technical field [0001] The invention belongs to the technical field of chemical mechanical polishing, and in particular relates to a preparation method, product and application of a 4D printing NiTi alloy EBSD sample polishing solution. Background technique [0002] 4D printed NiTi alloy has excellent superelasticity and shape memory properties, as well as excellent comprehensive mechanical properties, biocompatibility and corrosion resistance, and has very broad application prospects in aerospace, medical equipment, chemical and other fields. The grain size, phase composition, content and texture of the alloy have a significant impact on its performance and mechanical properties. The EBSD technology can be used to test and analyze the grain size, phase composition, content and texture of the alloy. [0003] Therefore, EBSD technology has attracted more and more attention from alloy researchers. The EBSD test has very high requirements on the surface quality of the test sam...

AI Technical Summary

Problems solved by technology

Mechanical polishing mostly uses diamond, alumina and silica sol as abrasives, which has the advantages of simple operation, large polishing area and wide adaptability, but the mechanical polishing takes a long time and cannot remove the surface stress of the printed sample, making it difficult to meet the requirements of the EBSD test for samples. requirements; chemical polishing has the advantages of fast speed, simple operation and high repeatability, but chemical polishing is easy to produce tiny corrosion pits on the surface of the sample, and chemical polishing agents usually contain toxic substances such as nitric acid, which have certain harm to the environment and operators Harm; samples prepared by electropolishing usually have a higher calibration rate, but the formulation and electrolysis parameters of the appropriate electrolyte are usually difficult to obtain, and the electrolyte is also a toxic substance; vibration polishing, ion thinning and focused ion beam methods can prepare quality Good EBSD samples, but expensive to prepare samples and cannot prepare samples of larger sizes

Images