A kind of ice nano-indentation sample platform and related experimental method

Abstract

The invention relates to an ice nano-grade indentation sample bench and a related experiment method. The ice nano-grade indentation sample bench belongs to the technical field of micro-scale mechanical performance testing. An accommodation bench I (1) used for accommodating a cooling material is arranged on the bench body of the sample bench. A layer is insulation material (2) is arranged in the accommodation tank I (1). An elevation bench (4) is arranged in the accommodation tank I (1). An accommodation tank II (2) used for accommodating an ice material is arranged on the elevation bench (4). An insulation layer is arranged between an indenter head indenting part and a chucking part. The chucking part matches a fixture of a nano-indenter head. According to the invention, the temperature of the material to be tested is controlled by using the cooling material. The entire experiment has the advantages of simple material preparation, low cost, and easy realization, such that the entire experiment process is optimized.

Description

technical field [0001] The present invention relates to a sample stage, in particular to a sample stage used when an ice body experiment is performed with a nano-indenter. [0002] The invention also relates to a method for carrying out a nano-indentation experiment using the above-mentioned sample stage and indenter, which belongs to the technical field of micro-scale mechanical property testing. Background technique [0003] At present, the material mechanical properties experiment based on nanoindentation method has become an effective method to detect the mechanical properties of material microstructure, and is widely used in the research of microstructure mechanical properties under normal temperature environment. However, for ice bodies in the laboratory, there are many difficulties in microstructural mechanical properties experiments by nanoindentation, especially the mechanical properties of thin film ice bodies have not been reported, such as polymer thin film mecha...

AI Technical Summary

Problems solved by technology

This method cannot lower the material being tested to sub-zero temperatures due to the loading system's inability to withstand excessively low temperatures

[0004] Second, the conventional method uses ice to lower the temperature of the material to be tested to about zero degrees, but the melting of ice will pollute the surface of the sample, making the test results biased

[0005] Third, the nanoindentation test cycle is long, requiring the material to remain in a constant state during the experiment

During the experiment, the indenter is in contact with the ice body, which will continuously transfer heat, which will increase the temperature of the measured point, and the test results will have a large dispersion.

Fourth, the ice body prepared at low temperature will have protrusions, depressions and air bubbles on the surface, which makes the surface roughness of the measured surface larger, making nanoindentation experiments impossible

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