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A kind of preparation method of nano high entropy alloy powder

A high-entropy alloy and powder technology, which is applied in the field of metal powder processing, can solve the problems of low powder purity, large particle size scale, and complex process, and achieve the effects of high metal purity, complete crystal form, and component segregation

Active Publication Date: 2021-12-07
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiment of the present application is to provide a method for preparing nano-high-entropy alloy powders, and to prepare nano-high-entropy alloy powders through the technical means of "co-precipitation and hydrogen and / or carbon monoxide reduction", which solves the problem of existing high-entropy alloys. The powder preparation method has technical problems such as complex process and long process, low powder purity and large particle size scale

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  • A kind of preparation method of nano high entropy alloy powder
  • A kind of preparation method of nano high entropy alloy powder
  • A kind of preparation method of nano high entropy alloy powder

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Embodiment 1

[0088] The present embodiment 1 provides a kind of preparation method of FeCoNiCuPt nano high entropy alloy powder, it comprises the following steps:

[0089] Based on the molar ratio of the transition metal elements being 1:1:1:1:1, the transition metal salt precursor was weighed according to the amount of each transition metal element being 0.3mmol, specifically 72.76mgNiCl 2 •6H 2 O, 59.88mgFeCl 2 • 4H 2 O, 51.68 mg CuCl 2 • 2H 2 O, 71.12mgCoCl 2 •6H 2 O, 3mL (0.1M) H 2 PtCl 6 •6H 2 O. 85.5 mg of polyvinylpyrrolidone was added to 40 mL of ethanol solvent, stirred and dissolved in a constant temperature water bath at 60° C., then 18 mg of activated carbon was added and ultrasonically dispersed for 10 min to obtain a blended solution;

[0090] In a constant temperature water bath at 60°C and during the stirring process, 10 mL (1M) NaOH solution was added dropwise to the blended solution, and the stirring was continued for 2 h to allow the transition metal salt precur...

Embodiment 2

[0109] The present embodiment 2 provides a kind of preparation method of FeCoNiCuCrPt nanometer high entropy alloy powder, and it comprises the following steps:

[0110] Based on the molar ratio of the transition metal elements being 1:1:1:1:1:1, the transition metal salt precursor was weighed according to the amount of each transition metal element being 0.3mmol, specifically 72.76mgNiCl 2 •6H 2 O, 59.88mgFeCl 2 • 4H 2 O, 51.68 mg CuCl 2 • 2H 2 O, 71.12mgCoCl 2 •6H 2 O, 83.27mgCrCl 3 •6H 2 O, 3mL (0.1M) H 2 PtCl 6 •6H 2 O and 90mg of polyvinylpyrrolidone were added to 50mL of ethanol solvent, stirred and dissolved in a constant temperature water bath at 60°C, then 20mg of activated carbon was added and ultrasonically dispersed for 10min to obtain a blended solution;

[0111] In a constant temperature water bath at 60°C and during the stirring process, 15 mL (1M) NaOH solution was added dropwise to the blended solution, and the stirring was continued for 2 h to allo...

Embodiment 3

[0115] The present embodiment 3 provides a kind of preparation method of AgAuPtCuPd nanometer high entropy alloy powder, and it comprises the following steps:

[0116] Based on the molar ratio of the transition metal elements being 1:1:1:1:1, the transition metal salt precursor was weighed according to the amount of each transition metal element being 0.3mmol, specifically 51.48mgAgNO 3 , 3mL (0.1M) H 2 PtCl 6 •6H 2 O, 3mL (0.1M) HAuCl 4 , 51.68mg CuCl 2 • 2H 2 O, 83.27mgCrCl 3 •6H 2 O, 89.15 mg Na 2 PdCl 4 And 90mg of polyvinylpyrrolidone was added to 50mL of ethanol solvent, and stirred and dissolved in a constant temperature water bath at 60°C, then 20mg of activated carbon was added and ultrasonically dispersed for 10min to obtain a blended solution;

[0117] In a constant temperature water bath at 60°C and during the stirring process, 20 mL (1M) NaOH solution was added dropwise to the blended solution, and the stirring was continued for 2 h to allow the transitio...

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Abstract

The invention belongs to the field of metal powder processing, and specifically discloses a preparation method of nano high-entropy alloy powder, comprising: dissolving more than five transition metal salt precursors in the same solvent and ultrasonically dispersing to obtain a blend solution; After adding a strong alkali solution for co-precipitation reaction, aging is carried out at a temperature of 60-180°C, and then the precipitated mixture is separated and washed with water, washed with alcohol, and dried in sequence; at a temperature of 400-800°C and in an air atmosphere, the The transition metal hydroxide mixture is calcined to obtain transition metal oxides; at a temperature of 300-600°C and in a hydrogen / carbon monoxide atmosphere, the transition metal oxides are reduced to obtain nanometer high-entropy alloy powders. The preparation method of the nanometer high-entropy alloy powder provided by the invention not only has the characteristics of simple process and short process, but also is suitable for preparing nanometer high-entropy alloys with different components in large quantities, and is easy to be industrialized.

Description

technical field [0001] The embodiments of the present application relate to the technical field of metal powder processing, and in particular to a method for preparing nanometer high-entropy alloy powder. Background technique [0002] High-entropy alloys (HEAs) are new alloys formed by five or more metals with equiatomic ratios or close to equiatomic ratios. Lattice distortion energy, slow diffusion effect and cocktail effect, so that high-entropy alloys have many excellent properties, such as higher strength, hardness, toughness, oxidation resistance and adsorption properties. Based on this, high-entropy alloys have great potential application value in many fields. For example, spraying nano-high-entropy alloy powder on the surface of a material can improve the strength and hardness of the material; nano-high-entropy alloy powder has excellent catalytic performance and can be used in It catalyzes chemical reactions such as methanol oxidation and oxygen evolution; the nano ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/26
Inventor 钟玉洁王圣洁刘洋汝王旭
Owner XI'AN PETROLEUM UNIVERSITY