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An al-nb-ti-zr-si series high-entropy alloy resistant to acid corrosion

An al-nb-ti-zr-si, high-entropy alloy technology, which is applied in the field of new alloy materials and its preparation, can solve the problems of less attention to corrosion resistance and ignore the impact, and achieve excellent corrosion resistance, alloy Uniform structure and composition, improved microstructure and properties

Active Publication Date: 2022-06-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, studies have shown that the elements in high-entropy alloys include transition metals, base metals, lanthanides, etc. Among them, Al, Co, Cr, Fe, and Ni are used most frequently, but the impact of non-metallic elements on high-entropy alloys is ignored. Effects on organization and performance
As a self-dissolving non-metallic element, Si can improve the mechanical properties of steel and improve the wear resistance and hardness of high-entropy alloys, but less attention has been paid to corrosion resistance.
At present, Si-containing high-entropy alloys based on the AlNbTiZr system have not been reported, so the development of AlNbTiZrSi with excellent corrosion resistance x High-entropy alloy tools are of great significance to the development of high-entropy alloys and the exploration of high acid corrosion resistance

Method used

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  • An al-nb-ti-zr-si series high-entropy alloy resistant to acid corrosion
  • An al-nb-ti-zr-si series high-entropy alloy resistant to acid corrosion
  • An al-nb-ti-zr-si series high-entropy alloy resistant to acid corrosion

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Preparation of AlNbTiZrSi x High-entropy alloy, wherein the atomic percentage of each element is as follows: Al 24-25%, Nb 24-25%, Ti 24-25%, Zr 24-25%, Si 0.3%.

[0031] Step 1, AlNbTiZrSi 0.3 The preparation materials of high-entropy alloys (Al material, Nb material, Ti material, Zr material, Si material) were put into glass beakers, firstly use acetone solution to shake and clean in ultrasonic vibration device for 10-20 minutes, and then use absolute ethanol Do the same, and finally blow dry the material for later use. The AlNbTiZrSi 0.3 The high-entropy alloy material was converted into the corresponding weight in atomic percent and each metal component was weighed.

[0032]Step 2, (1) Put the weighed materials in step 1 into the copper crucible of the WK-II vacuum arc furnace successively in the order in which the melting point rises, and use 400 mesh, 800 mesh, 800 mesh, Sand it with 1200-grit, 2000-grit sandpaper and put it in the middle of the vacuum furnace...

Embodiment 2

[0038] Preparation of AlNbTiZrSi x High-entropy alloy, wherein the atomic percentage of each element is as follows: Al 24-25%, Nb 24-25%, Ti 24-25%, Zr 24-25%, Si 0.6%.

[0039] Step 1, AlNbTiZrSi 0.6 The preparation materials of high-entropy alloys (Al material, Nb material, Ti material, Zr material, Si material) were put into glass beakers, firstly use acetone solution to shake and clean in ultrasonic vibration device for 10-20 minutes, and then use absolute ethanol Do the same, and finally blow dry the material for later use. The AlNbTiZrSi 0.6 The high-entropy alloy material was converted into the corresponding weight in atomic percent and each metal component was weighed.

[0040] Step 2, (1) Put the weighed materials in step 1 into the copper crucible of the WK-II vacuum arc furnace successively in the order in which the melting point rises, and use 400 mesh, 800 mesh, 800 mesh, Sand it with 1200-grit, 2000-grit sandpaper and put it in the middle of the vacuum furnac...

Embodiment 3

[0046] Preparation of AlNbTiZrSi x High-entropy alloy, wherein the atomic percentage of each element is as follows: Al 24-25%, Nb 24-25%, Ti 24-25%, Zr 24-25%, Si 1.0%.

[0047] Step 1, AlNbTiZrSi 1.0 The preparation materials of high-entropy alloys (Al material, Nb material, Ti material, Zr material, Si material) were put into glass beakers, firstly use acetone solution to shake and clean in ultrasonic vibration device for 10-20 minutes, and then use absolute ethanol Do the same, and finally blow dry the material for later use. The AlNbTiZrSi 1.0 The high-entropy alloy material was converted into the corresponding weight in atomic percent and each metal component was weighed.

[0048] Step 2, (1) Put the weighed materials in step 1 into the copper crucible of the WK-II vacuum arc furnace successively in the order in which the melting point rises, and use 400 mesh, 800 mesh, 800 mesh, Sand it with 1200-grit, 2000-grit sandpaper and put it in the middle of the vacuum furnac...

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Abstract

The invention discloses a Si-containing acid-corrosion-resistant high-entropy alloy material and a preparation technology thereof. The composition of the high entropy alloy is AlNbTiZrSi x , each component is based on the atomic percentage: Al 22-27%, Nb 22-27%, Ti 22-27%, Zr 22-27%, Si 0.1-1.5%. By adjusting the content of Si element, the microstructure, hardness and corrosion resistance of high-entropy alloys can be improved. The invention prepares the high-entropy alloy through a WK-II vacuum electric arc furnace, and the preparation method includes: ultrasonic cleaning and material weighing; melting: using the WK-II vacuum electric arc furnace to repeatedly smelt the material several times in an argon environment. AlNbTiZrSi prepared by the present invention x High-entropy alloys have a dual-phase structure, uniform structure, no segregation of components, and exhibit excellent corrosion resistance in the harsh environment of hydrochloric acid solution. AlNbTiZrSi x High-entropy alloys have good hardness and corrosion resistance at the same time, and have good application prospects in chemical production and petroleum equipment industry.

Description

technical field [0001] The invention relates to an acid corrosion-resistant AlNbTiZrSi x A high-entropy alloy material and a preparation method belong to the technical field of novel alloy materials and preparation thereof. Background technique [0002] High-entropy alloy is a new alloy system. Different from the traditional design concept of alloy materials, high-entropy alloy is composed of five or more than five main elements, and the content of each element is about 5at.%~35at.%. The phenomenon of high configurational entropy in high-entropy alloys results in the alloys tending to form simple random solid solutions rather than intermetallics, such as FCC, BCC or HCP, and reducing the formation of intermetallic phases is also beneficial for material properties. of. In addition, high-entropy alloys exhibit four unique effects: high-entropy effect, lattice distortion, slow diffusion and cocktail effect, which bring more excellent and richer properties to high-entropy allo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02
Inventor 骆鸿魏亚成红旭潘志敏李晓刚
Owner UNIV OF SCI & TECH BEIJING