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Method and system for studying mechanical properties of membrane-matrix composite structure

A technology of composite structure and mechanical properties, applied in the direction of material electrochemical variables, test material hardness, etc., can solve the problems of continuous growth, thin film cannot be zero thickness, test film-matrix composite structure can not realize the film layer, etc., to achieve uniform properties, The indentation depth is consistent and the effect of meeting the precision requirements

Inactive Publication Date: 2017-06-06
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the films in the prior art cannot be continuously grown with zero thickness, and the mechanical properties of the film-matrix composite structure cannot be realized in real time.

Method used

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  • Method and system for studying mechanical properties of membrane-matrix composite structure

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Embodiment

[0032] This embodiment provides a method for studying the mechanical properties of a membrane-matrix composite structure, such as figure 1 As shown, the specific steps are as follows:

[0033] S1. Surface pretreatment on the coating surface of the substrate

[0034] Clean and / or polish the coating surface of the metal or alloy substrate.

[0035] As an embodiment of the present invention, in this embodiment, the base material is metal.

[0036] S2. Anodizing treatment

[0037] The substrate to be coated is directly stacked on the positive electrode, and the first anodization treatment is carried out. The depth of the surface to be coated in the electrolyte is 3 mm to 8 mm, so that the surface to be coated starts to grow a layer of oxide film continuously at zero thickness. A polarization time is 30s ~ 90s.

[0038] As an embodiment of the present invention, in this embodiment, the depth of the surface to be coated in the electrolyte is 3mm, and the first polarization time ...

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Abstract

The invention relates to the technical field of engineering materials, and in particular, relates to a method and system for studying mechanical properties of a membrane-matrix composite structure by a nanoindentation method. The method for the mechanical properties of the membrane-matrix composite structure comprises the steps: anodizing treatment comprising the step of growing an oxide film on a substrate surface in situ real-timely; and indentation treatment comprising the steps of stopping polarization and carrying out indentation treatment of the oxide film. The anodizing treatment step and the indentation treatment step are carried out for N times alternately, wherein N is more than or equal to 2; the elastic modulus and hardness of the membrane-matrix composite structure under conditions of different thickness ratios are tested, and the relationship of the modulus and hardness measured by tests and the modulus and hardness of a membrane and the relationship of the modulus and hardness measured by the tests and the modulus and hardness of a matrix are established by using a nanoindentation theory. The system for testing the mechanical properties of the membrane-matrix composite structure comprises an electrochemical assembly and a nanoindentation assembly, the problem study scope which can be realized by a nanoindentation instrument can be greatly expanded, and a new analysis method is provided for study of a thin membrane-matrix deformation mechanism under an electrochemical environment.

Description

technical field [0001] The invention relates to the technical field of engineering materials, in particular to a method and system for studying the mechanical properties of a membrane-matrix composite structure by a nano-indentation method. Background technique [0002] Materials are the foundation of human material civilization, and the development of material technology supports the development of other new technologies. With the development and progress of science and technology, various new materials have developed rapidly and are widely used in high-tech fields. As a new type of functional material, thin-film materials have been widely used in optics, semiconductor industry, computer storage, medicine and pharmacy, thin-film batteries and other fields, and more stringent requirements are put forward for their reliability and performance. The micromechanical properties of materials have an important impact on their macroscopic failure mechanisms. Therefore, it is necess...

Claims

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Application Information

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IPC IPC(8): G01N3/40G01N27/30
CPCG01N3/40G01N27/30
Inventor 冯雪方旭飞李燕
Owner TSINGHUA UNIV
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