Metallographic corrosive agent for amorphous alloys and observation method for metallographic structures of amorphous alloys

A technology of amorphous alloy and metallographic structure, which is applied in the field of observation of amorphous alloy metallographic corrosion agent and amorphous alloy metallographic structure, can solve the problems of harmful environment, inconvenient observation of crystal phase, complicated preparation and use process, etc., and achieves The effect of fast corrosion speed, improved contrast, and easy identification

Inactive Publication Date: 2012-03-21
SUZHOU SHIHAO BUILDING MATERIAL NEW TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention aims to solve the defect that the metallographic etchant in the prior art is easy to corrode the crystal phase of the amorphous alloy and forms an oxide film on the surface of the sample, which makes the crystal phase inconvenient to observe or its preparation and use process is complicated and harmful to the environment

Method used

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  • Metallographic corrosive agent for amorphous alloys and observation method for metallographic structures of amorphous alloys
  • Metallographic corrosive agent for amorphous alloys and observation method for metallographic structures of amorphous alloys
  • Metallographic corrosive agent for amorphous alloys and observation method for metallographic structures of amorphous alloys

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Experimental program
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Effect test

Embodiment 1

[0034] The sample is composed of Zr 56.2 Ti 13.8 Cu 6.9 Ni 5.6 be 12.5 Nb 5.0 After grinding and polishing the observation surface of the amorphous alloy sample, select a mixed solution containing 0.12mol / L hydrofluoric acid, 0.74mol / L phosphoric acid, 1.05mol / L oxalic acid, and water balance Etching for 60s, and then using 10 grams of KCl 3 , 0.3 g FeCl 3 Wipe with a mixed solution of 100ml of water for about 10s, and finally wash the metallographic observation surface with absolute ethanol, and dry it with a hair dryer to obtain an amorphous alloy sample A1.

Embodiment 2

[0036] The sample is composed of Zr 56.2 Ti 13.8 Cu 6.9 Ni 5.6 be 12.5 Nb 5.0 After grinding and polishing the observation surface of the amorphous alloy sample, select a mixed solution containing 0.25mol / L hydrofluoric acid, 0.35mol / L phosphoric acid, 1.5mol / L oxalic acid, and water balance Etched for 50s, and then used containing 5 grams of KCl 3 , 1.0 g FeCl 3 Wipe with a mixed solution of 100ml of water for about 10s, and finally clean the metallographic observation surface with absolute ethanol, and dry it with a hair dryer to obtain an amorphous alloy sample A2.

Embodiment 3

[0038] The sample is composed of Zr 41.2 Ti 13.8 Cu 12.5 Ni 10 be 22.5 After the observation surface of the amorphous alloy is ground and polished, it is dipped in a mixed solution containing 0.45mol / L hydrofluoric acid, 0.74mol / L phosphoric acid, 1.70mol / L oxalic acid and the rest of the water. Eclipse for 30s, and then use 3.5 grams of KCl 3 , 1.5 g FeCl 3 Wipe with a mixed solution of 100ml of water for about 10s, and finally wash the metallographic observation surface with absolute ethanol, and dry it with a hair dryer to obtain an amorphous alloy sample A3.

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Abstract

The invention provides a metallographic corrosive agent for amorphous alloys, which comprises a primary corrosive agent and a secondary corrosive agent, wherein the primary corrosive agent is mixed liquor of hydrofluoric acid, phosphoric acid and oxalic acid, and the secondary corrosive agent is water liquor of FeCl3 (ferric trichloride) and KCl (potassium chloride). The invention further relates to an observation method for metallographic structures of the amorphous alloys, which includes the steps of placing the amorphous alloys under a metallographic microscope after rough grinding, fine grinding and polishing for the surfaces of the amorphous alloys and after corroding the amorphous alloys with the metallographic corrosive agent. The steps of corroding the amorphous alloys with the metallographic corrosive agent include: a etching the surfaces of the amorphous alloys with the mixed liquor of the hydrofluoric acid, the phosphoric acid and the oxalic acid, and b wiping the surfaces of the amorphous alloys with the water liquor of the FeCl3 and the KCl. The metallographic corrosive agent is beneficial to observation of the metallographic structures of the amorphous alloys and evaluation of the quality of the amorphous alloys.

Description

technical field [0001] The invention relates to the technical field of amorphous alloys, in particular to an amorphous alloy metallographic etchant and a method for observing the amorphous alloy metallographic structure. Background technique [0002] Amorphous alloys refer to metals whose atoms are arranged in three-dimensional space without long-range order. Because it has some structural characteristics similar to glass, it is also called metallic glass. In 1960, Professor Duwer and others in the United States first produced Au-Si series amorphous alloys by melt quenching method. For more than 40 years, various amorphous soft magnetic alloys represented by Fe series, Ni series and Zr series Because it has better magnetic and mechanical properties than conventional commercial crystalline alloys in many aspects, it has been applied in electric power, electronics, information and other technologies. [0003] Although single-phase bulk amorphous alloys (BMG) have excellent f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/26C23F1/10G01N1/32G01N21/84
Inventor 周舟
Owner SUZHOU SHIHAO BUILDING MATERIAL NEW TECH ENG
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