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A method for characterizing strengthening phases of ferromagnetic alloy bulk and/or thin films

A technology of strengthening phases and alloy blocks, which is applied in the direction of material analysis, instruments, and measuring devices using wave/particle radiation, which can solve the problems of expensive, increasing difficulty and cost of ferromagnetic alloy analysis and characterization

Active Publication Date: 2021-04-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This equipment is extremely expensive, which greatly increases the difficulty and cost of analytical characterization of ferromagnetic alloys
[0004] Regarding the structural characterization of the nano-reinforced phase of ferromagnetic alloys, there are no public reports at home and abroad that separate the nano-reinforced phase from the alloy for separate characterization

Method used

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  • A method for characterizing strengthening phases of ferromagnetic alloy bulk and/or thin films
  • A method for characterizing strengthening phases of ferromagnetic alloy bulk and/or thin films
  • A method for characterizing strengthening phases of ferromagnetic alloy bulk and/or thin films

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1: Fe-14Cr-3W-0.4Ti-1.0Y 2 o 3 (wt.%)Characterization of alloy strengthening phase

[0060] In the electrolytic separation of Fe-14Cr-3W-0.4Ti-1.0Y 2 o 3 (wt.%) Before the alloy strengthening phase, the microstructure of the alloy was characterized by OM. Then carry out electron microscope characterization according to the following steps:

[0061] The first step: using Fe-14Cr-3W-0.4Ti-1.0Y 2 O (wt.%) 3 The alloy sample is used as the anode, the stainless steel cylinder is used as the cathode, electrolyzed in the electrolyte, Fe-14Cr-3W-0.4Ti-1.0Y 2 o 3 (wt.%) The strengthening phase in the alloy is separated from the alloy matrix to obtain an electrolyte solution containing the strengthening phase. The electrolyte used is composed of 2% of tetramethylammonium chloride, 15% of acetylacetone, 3% of glycerol, and the balance is absolute ethanol. The electrolysis parameters are: voltage 6V, electrolysis time 10min;

[0062] The second step is to extra...

Embodiment 2

[0067] Embodiment 2: Fe-14Cr-3W-0.4Ti-0.25Y 2 o 3 (wt.%)Characterization of alloy strengthening phase

[0068] In the electrolytic separation of Fe-14Cr-3W-0.4Ti-0.25Y 2 o 3 (wt.%) Before the alloy strengthening phase, the microstructure of the alloy was characterized by OM. Then carry out electron microscope characterization according to the following steps:

[0069] The first step: using Fe-14Cr-3W-0.4Ti-0.25Y 2 o 3 (wt.%) The alloy sample is used as the anode, the stainless steel cylinder is used as the cathode, and electrolyzed in the electrolyte, the Fe-14Cr-3W-0.4Ti-0.25Y 2 o 3 (wt.%) The strengthening phase in the alloy is separated from the alloy matrix to obtain an electrolyte solution containing the strengthening phase. The electrolyte solution used is composed of: 2% tetramethylammonium chloride, 3% cetyltrimethylammonium chloride, 25% acetylacetone, 5% glycerol, and the balance is absolute ethanol. The electrolysis parameters are: voltage 3V, electrolysis ...

Embodiment 3

[0075] Embodiment 3: Fe-14Cr-3W-0.4Ti-5Y 2 o 3 (wt.%)Characterization of alloy strengthening phase

[0076] In the electrolytic separation of Fe-14Cr-3W-0.4Ti-5Y 2 o 3 (wt.%) Before the alloy strengthening phase, the microstructure of the alloy was characterized by OM. Then carry out electron microscope characterization according to the following steps:

[0077] The first step: using Fe-14Cr-3W-0.4Ti-5Y 2 o 3 (wt.%) The alloy sample is used as the anode, the stainless steel cylinder is used as the cathode, and electrolyzed in the electrolyte, the Fe-14Cr-3W-0.4Ti-5Y 2 o 3 (wt.%) The strengthening phase in the alloy is separated from the alloy matrix to obtain an electrolyte solution containing the strengthening phase. The electrolytic solution used is composed of: 0.5% tetramethylammonium chloride, 5% acetylacetone, and the balance is anhydrous methanol. The electrolysis parameters are: voltage 3V, electrolysis 4h.

[0078] In the second step, the electrolyte solution ...

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Abstract

The invention relates to a strengthening phase characterization method of a ferromagnetic alloy block and / or thin film. The optimization scheme includes: using electrolysis to separate the nano- to micron-sized strengthening phase in the ferromagnetic alloy from the alloy matrix to obtain an electrolyte containing the strengthening phase; then dilute with absolute ethanol, disperse ultrasonically, and drop it onto the ultra-thin carbon support membrane and drying to obtain a sample for electron microscopy; and then use electron microscopy for structure observation and characterization. The invention can characterize the morphology and structure of the strengthening phase smaller than 0.5 μm in the ferromagnetic alloy, especially the strengthening phase whose size is smaller than 50 nm. The strengthened phase separated and obtained by the invention retains the original structure of the strengthened phase, the method is simple and efficient, the electrolysis conditions are easy to obtain, the operation is simple, and the repeatability is strong, and it can be used for the analysis and characterization of the strengthened phase in various ferromagnetic materials. The invention effectively avoids the adverse effect of the ferromagnetic alloy matrix on the electron microscope equipment and the detection process, and realizes the TEM / HRTEM structure characterization of the ferromagnetic alloy strengthening phase.

Description

technical field [0001] The invention relates to a strengthening phase characterization method of a ferromagnetic alloy block and / or thin film, belonging to the field of metal material and its strengthening phase structure characterization. Background technique [0002] Ferromagnetic alloys include iron-based, cobalt-based, and nickel-based alloys. Because they are magnetic or magnetized under the action of an electromagnetic field, they will cause strong signal interference to the electron microscope equipment and pollute key parts of the electron microscope such as the pole shoe and aperture of the transmission electron microscope. and damage. Therefore, ferromagnetic alloys usually use metallographic microscopes and scanning electron microscopes for microstructure observation and structural characterization. Due to the limited magnification (50-50k times), in-depth observation and analysis cannot be carried out, especially the structure and other information of the nanosc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/2202
CPCG01N23/2202
Inventor 刘祖铭李全黄伯云吕学谦彭凯赵凡
Owner CENT SOUTH UNIV
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