Preparation method of magnesium-alloy electron backscatter diffraction sample (EBSD) and special electrolyte thereof

An electron backscattering and sample preparation technology, applied in the preparation of test samples, electrolysis process, electrolysis components, etc., can solve the problems of high price and high cost, and achieve the effect of practical cost, cost reduction and high definition

Inactive Publication Date: 2012-03-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a magnesium alloy electron backscatter diffraction sample and its special electrolyte, which solves the problems of high cost in the prior art. The electrolyte replaces the expensive commercial electrolyte of magnesium alloy, and the preparation is qualified Magnesium alloy EBSD specimens, which are cheap and easy to implement

Method used

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  • Preparation method of magnesium-alloy electron backscatter diffraction sample (EBSD) and special electrolyte thereof
  • Preparation method of magnesium-alloy electron backscatter diffraction sample (EBSD) and special electrolyte thereof
  • Preparation method of magnesium-alloy electron backscatter diffraction sample (EBSD) and special electrolyte thereof

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Embodiment 1

[0029] The preparation method of the magnesium alloy electron backscatter diffraction sample of the present invention comprises the following steps:

[0030] (1) Electrolyte preparation, put perchloric acid and alcohol into the beaker according to the volume ratio of 1:9 and stir, the minimum volume of the electrolyte can satisfy the electrolysis sample can be fully immersed;

[0031] In this embodiment, the purity of perchloric acid is 70.0-72.0%wt, and the purity of alcohol is ≥99.7%wt.

[0032] (2) Sample coating, cover the part of the sample that does not need electrolysis with nail polish (conventional nail polish is acceptable, the active ingredients are toluene, butyl acetate, formaldehyde resin and ethyl acetate, etc.), the sample The part connected to the anode must not be covered;

[0033] (3) Electrolysis, pour liquid nitrogen into a beaker filled with electrolyte until the temperature of the electrolyte is lower than -20°C, hang the AZ31 magnesium alloy sample on ...

Embodiment 2

[0038] Adopt exactly the same step and technical requirement as in embodiment 1, prepared AZ61 magnesium alloy electron backscatter diffraction (EBSD) sample, image 3 It is the Kikuchi band diagram of the prepared AZ61 EBSD sample. The Kikuchi band in the picture is clearly visible, meeting the requirements of the EBSD experiment.

Embodiment 3

[0040] Adopt exactly the same step and technical requirement as in embodiment 1, prepared AZ80 magnesium alloy electron backscatter diffraction (EBSD) sample, Figure 4 It is the Kikuchi band diagram of the prepared AZ80 EBSD sample. The Kikuchi band in the picture is relatively clear, which meets the requirements of the EBSD experiment.

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Abstract

The invention relates to a preparation method of a magnesium-alloy electron backscatter diffraction sample (EBSD) and special electrolyte thereof, which belongs to the field of magnesium-alloy electrolysis process and is mainly applied in preparing high-quality EBSD samples. The method comprises the following steps of: (1) preparation of the electrolyte: putting perchloric acid and alcohol into a beaker according to the volume ratio of 1:9, and stirring till the minimum volume of the electrolyte can meet the condition that an electrolytic sample can be wholly immersed; (2) sample coating: covering the parts of the sample without need of electrolysis by using coating liquid, and avoiding from covering the connecting part of the sample and an anode; (3) electrolysis: pouring liquid nitrogen into the beaker containing the electrolyte, and when the temperature of the electrolyte is between -20 DEG C and -50 DEG C, carrying out electrolysis; and (4) sample cleaning. By adoption of the invention, the problems such as high cost and the like in the prior art can be solved, the electrolyte can replace the commercial electrolyte of magnesium alloy with expensive price, the qualified magnesium-alloy EBSD sample is prepared, the cost is low and the implementation is easy.

Description

technical field [0001] The invention relates to a preparation method of a magnesium alloy electron backscatter diffraction (EBSD) sample and a special electrolyte thereof, which belongs to the field of electrolysis technology of magnesium alloys and is mainly used for preparing high-quality EBSD samples. Background technique [0002] With the development of science and technology, the electron backscatter diffraction (EBSD) technique used to measure the crystallographic orientation of materials, study the microscopic texture, the crystallographic characteristics of the interface and its distribution state has been rapidly developed and perfected. Its main feature is to perform sub-micron diffraction with spatial resolution (giving crystallographic data) while retaining the conventional features of scanning electron microscopy. Classify according to the crystallographic orientation collected in the sample, take a certain orientation as a reference, and compare other orientati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/04C25F7/00G01N1/32G01N1/34
Inventor 张士宏宋广胜严操王忠堂
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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