Method for preparation of double-phase zirconium alloy EBSD sample by electrolytic polishing

A technology of electropolishing and zirconium alloys, which is applied in the preparation of test samples, material analysis using radiation diffraction, measuring devices, etc., can solve the problems of insufficient research on the dual-phase structure of dual-phase zirconium alloys, and achieve stable polishing effect. Easy to formulate and effective from a wide range of raw materials

Inactive Publication Date: 2017-04-05
CHONGQING UNIV OF TECH
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AI Technical Summary

Benefits of technology

This patented technology allows creation of double phase ZrAl2O4 ceramics with unique properties such as excellent mechanical strength at very different temperatures or even when exposed to water vapor without losing their ability to conduct electricity. These materials are useful because they have potential applications in various industries like energy storage devices, catalysts, sensors, biomedical implants, electronic components, optical coatings, environmental protection systems, automobile parts, military equipment, medical products, and other fields where reliability needs to be assessed accurately.

Problems solved by technology

This patents discusses various methods for studying the behavioral features of double-strand type metals called zircalum (zinc)-nickel) at atomic level. These techniques include both conventional methodologies like XRD and EDX, ion beam etchings, scanning probe microscopics, and liquid core boron diathermy. While these technological advances allow us to study complex structures containing multiple atoms within them, there remains challenges related to achieving consistency during processing.

Method used

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  • Method for preparation of double-phase zirconium alloy EBSD sample by electrolytic polishing
  • Method for preparation of double-phase zirconium alloy EBSD sample by electrolytic polishing
  • Method for preparation of double-phase zirconium alloy EBSD sample by electrolytic polishing

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preparation example Construction

[0020] 1) Preparation of workpiece

[0021] Use a cutting tool (such as a wire cutting tool) to cut a two-phase zirconium alloy bar along the length, width, and thickness directions, and cut a workpiece with a three-dimensional structure according to the process requirements; for example, according to the process requirements, cut a workpiece with a geometric size of 10mm×8mm×3mm The number of workpieces is spare;

[0022] 2) Grinding of the workpiece

[0023] Use metallographic water abrasive paper to polish each surface of the workpiece; for example, use 240# metallographic water abrasive paper for grinding; then use the fixture to clamp the workpiece, and then use sandpaper to polish the LD-TD surface of the workpiece step by step. For example, use sandpaper with smaller sand grains to polish step by step, use 400#~3000# sandpaper to polish the LD-TD surface (the surface in the direction of length and thickness) of the workpiece step by step; finally remove the workpiece a...

Embodiment 1

[0031] Using a wire cutting tool, cut the forged biphase Zr-2.5Nb zirconium alloy bar (strain ε ~ 30%) along the length, width, and thickness directions (represented by LD, WD, and TD) to cut workpieces of 10 mm × 8 mm × 3 mm. First, use 240# metallographic water abrasive paper to polish each surface of the workpiece; then use the fixture to clamp the workpiece, and use 400#, 800#, 1000#, 1200#, 2000# and 3000# sandpaper to grind the LD of the workpiece -TD surface (the surface in the direction of length and thickness) is polished step by step to be smooth and bright; finally, the workpiece is removed, and the surface of the sample is washed with water and ethanol in sequence, and dried with cold air for use.

[0032]The volume ratio of the electrolytic polishing liquid used for preparing the surface treatment of the workpiece is: 10% perchloric acid, 70% methanol, and 20% ethylene glycol monobutyl ether. The dual-phase zirconium alloy workpiece is used as the anode, connected...

Embodiment 2

[0034] Using a wire cutting tool, cut a workpiece of 10 mm × 7 mm × 3 mm along the length, width and thickness directions (represented by LD, WD and TD) of the dual-phase Zr-2.5Nb zirconium alloy forged bar (strain ε~30%). First, use 240# metallographic water abrasive paper to polish each surface of the workpiece; then use the fixture to clamp the workpiece, and use 400#, 800#, 1000#, 1200#, 2000# and 3000# sandpaper to grind the LD of the workpiece -TD surface (the surface in the direction of length and thickness) is polished step by step to be smooth and bright; finally, the workpiece is removed, and the surface of the sample is cleaned with water and ethanol in sequence, and dried with cold air for use.

[0035] The volume ratio of the electrolytic polishing liquid used for preparing the surface treatment of the workpiece is: 8% perchloric acid, 74% methanol, and 18% ethylene glycol monobutyl ether. The dual-phase zirconium alloy workpiece is used as the anode, connected to...

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Abstract

The invention provides a method for preparation of a double-phase zirconium alloy EBSD sample by electrolytic polishing. The method adopts the steps of: firstly, utilizing wire-cutting equipment to cut a workpiece according to certain size from a double-phase zirconium alloy material along the directions of length, width and thickness; subjecting the cut workpiece to step-by-step polishing with abrasive paper to remove the oxide skin and polishing the workpiece bright; taking the double-phase zirconium alloy workpiece as the anode to connect a power supply positive electrode; taking a stainless steel sheet or other steel as the cathode to connect a power supply negative electrode, and preparing a sample by electrolytic polishing technology. The preparation method provided by the invention can achieve high diffraction pattern quality in EBSD (electron backscatter diffraction) testing so as to realize reliable characterization of alpha and beta zirconium alloy dual phase microstructure, grain size, microtexture, grain boundary characteristics, misorientation distribution and the like of the two phase of alpha and beta zirconium alloy. The electrolytic polishing liquid provided by the invention has the advantages of wide raw material sources, simple preparation, and low cost, etc. The electrolytic polishing method involved in the invention has the characteristics of simple operation and stable polishing effect, and the polished workpiece has high good flatness and high surface smoothness.

Description

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Claims

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Application Information

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Owner CHONGQING UNIV OF TECH
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