Preparation method of a sample with rust layer for in-situ observation of transmission electron microscope

A technology of transmission electron microscopy and sample preparation, which is applied in the preparation of test samples, material analysis by measuring secondary emissions, etc. It can solve problems such as inability to analyze and calculate content, omissions, etc., to avoid errors, reduce high temperature and extrusion Effect

Inactive Publication Date: 2013-07-10
武汉钢铁有限公司
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Problems solved by technology

Therefore, the existing sample preparation method is easy to miss some phases in the transmission electron microscope observation, and it is impossible to analyze and calculate the content of each phase.

Method used

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  • Preparation method of a sample with rust layer for in-situ observation of transmission electron microscope
  • Preparation method of a sample with rust layer for in-situ observation of transmission electron microscope
  • Preparation method of a sample with rust layer for in-situ observation of transmission electron microscope

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Embodiment

[0032] The present invention is used for the sample preparation method of in-situ observation rust layer by transmission electron microscope, and this method mainly comprises the following steps:

[0033] 1) Encapsulate the obtained sample with rust layer by cold mounting method: mix epoxy resin and curing agent at a volume ratio of 5:1, and cover the surface layer of the rust layer sample with the mixed solution at room temperature, and remove the rust layer. Put the layer sample into the vacuum chamber for vacuum treatment, and after placing it for 3 hours, it will be ready after the epoxy resin is cured. In this way, the surface of the rust layer 2 of the rust layer sample is covered with a layer of inlay material layer 3, and it can be processed by vacuuming. Extract the gas in the mounting material;

[0034] 2) Cut the sample according to the size of the sample observed by the transmission electron microscope: first cut the inlaid sample into a small-sized sample with a c...

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Abstract

The invention discloses a preparation method of a sample with a rust layer for in-situ observation of a transmission electron microscope. The method comprises the following steps of: (1), integrally packaging an obtained sample with a rust layer by a cold embedding method; 2), cutting the sample according to the sample size facilitating observation of the transmission electron microscope; 3), thinning the sample primarily; 4), forming a thin sample area which can be observed by the transmission electron microscope; and 5), bonding the prepared sample to a phi3mm round copper mesh, so as to obtain the sample with the rust layer for the in-situ observation of the transmission electron microscope. By adopting the preparation method, the initial shape of the rust layer is remained completely, and the method is very suitable for preparing of the sample with the rust layer for observation of the transmission electron microscope; and the prepared sample is representative, can truly indicate the whole characteristics of the analyzed material, and has great significant in the corrosion resistance research of steel and iron materials.

Description

technical field [0001] The invention relates to a method for preparing a sample for observation and analysis by a transmission electron microscope, in particular to a method for preparing a sample for in-situ observation of a rust layer by a transmission electron microscope. Background technique [0002] Corrosion of steel is a common and serious problem, which has brought huge losses to the national economy. Therefore, the research on the corrosion resistance of steel has always been the focus of material researchers. The research on the corrosion resistance of iron and steel materials mainly focuses on: through the analysis and research of the corrosion product of iron and steel materials - rust layer, to understand the corrosion mechanism of iron and steel materials. [0003] The means of studying the rust layer, the corrosion product of steel, include scanning electron microscope, transmission electron microscope, electron probe, X-ray diffraction and other physical cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/36G01N23/22
Inventor 王志奋韩荣东孙宜强邓照军周运武陈士华张萍欧阳珉路刘敏王俊霖
Owner 武汉钢铁有限公司
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