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Ice nano-grade indentation sample bench and related experiment method

A nano-indentation and nano-indentation instrument technology, which is applied in the direction of testing material hardness, measuring devices, instruments, etc., can solve the problems of large surface roughness, contamination of the sample surface, temperature rise, etc., and achieve simple material preparation and optimized experiments Process, the effect of ensuring reliability

Inactive Publication Date: 2014-01-29
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Ice nano-grade indentation sample bench and related experiment method
  • Ice nano-grade indentation sample bench and related experiment method
  • Ice nano-grade indentation sample bench and related experiment method

Examples

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example 1

[0022] When using the ice nano-indentation sample stage to detect the mechanical properties of the resin film in a low temperature environment, first put the glass block as the base material into the holding tank II2, the height of the glass block is 200 microns lower than the height of the edge of the holding tank II2, Pour evenly stirred resin on the surface of the glass block. The height of the resin is about 1 mm higher than the holding tank II2. Pour the cooling material dry ice into the holding tank I1. After 15 minutes, grind the surface with 3000-grit sandpaper for 1 minute to make the resin The height is the same as the height of the edge of the holding tank II2, and the polishing is continued for 1 minute through the tweed. Put the indenter into the indenter fixture of the nanoindenter, and put the sample stage into the sample fixture of the nanoindenter. Adjust the height of the lifting device to ensure that the height of the ice conforms to the test height of the n...

example 2

[0024] When the ice nano-indentation sample stage is used to test the mechanical properties of the shape memory polymer film in a low temperature environment, the glass block as the base material is first put into the holding tank II2, and the height of the glass block is lower than the height of the edge of the holding tank II2 200 microns, pour evenly stirred shape memory polymer on the surface of the glass block, the height of the shape memory polymer is about 21 mm higher than the holding tank II, pour the cooling material dry ice into the holding tank I1, and pass through 1500 mesh sandpaper half an hour later Grind the surface for 1 minute, and grind the surface with 2000-grit sandpaper for 1 minute, so that the height of the shape-memory polymer film is the same as the height of the edge of the holding tank II2. Put the indenter into the indenter fixture of the nanoindenter, and put the sample stage into the sample fixture of the nanoindenter. Adjust the height of the l...

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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 invention relates to a sample stage, in particular to a sample stage used when coordinating with a nano-indentation instrument for ice experiments. [0002] The invention also relates to a method for performing nano-indentation experiments using the above-mentioned sample platform and indenter, which belongs to the technical field of micro-scale mechanical performance testing. Background technique [0003] At present, the material mechanical property experiment based on the nano-indentation method has become an effective method for testing the mechanical properties of the microstructure of materials, and is widely used in the study of the mechanical properties of the microstructure in the normal temperature environment. However, for ice bodies in the room, there are many difficulties in the experiment of microstructure mechanical properties by nanoindentation instrument, especially the measurement of the mechanical properties of thin film ice bodie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01N3/42
Inventor 杨庆生刘志远李熙杨忠军
Owner BEIJING UNIV OF TECH
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