High-entropy alloy material and preparation method thereof

A technology of high-entropy alloys and copper-based alloys, which is applied in the coating process and coating of metal materials, can solve the problems of poor strength and wear resistance, and achieve high friction resistance, high temperature oxidation resistance, and good high temperature The effect of stability

Inactive Publication Date: 2020-11-13
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pure copper has high thermal and electrical conductivity, excellent plasticity and toughness, but its strength and wear resistance are poor, and it is not suitable for working under high load conditions; combining the two makes it have good thermal conductivity and both It has high wear resistance, which improves the service life of copper materials and expands the scope of use

Method used

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  • High-entropy alloy material and preparation method thereof
  • High-entropy alloy material and preparation method thereof
  • High-entropy alloy material and preparation method thereof

Examples

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Embodiment 1

[0026] A high-entropy alloy material and a preparation method thereof, comprising the following steps:

[0027] High entropy alloy powder, the amount of each component is: 15% Cu, 23% Ta, 22% Nb, 20% Hf, 20% Zr.

[0028] (1) Calculate the mass of each component according to the atomic ratio, and then accurately weigh each component, and then use a vacuum arc melting furnace to perform repeated melting for 5 times to obtain a block high-entropy alloy.

[0029] (2) Grinding the massive high-entropy alloy obtained in step (1) with a vibration mill, and sieving to obtain 200-400 mesh high-entropy alloy powder. The obtained powder is tested by X-ray diffractometer and the obtained spectra are as follows: figure 2 , it can be seen that the powder structure mainly contains BCC, FCC and HCP structures.

[0030] The bulk high-entropy alloy is obtained by smelting in a vacuum arc melting furnace, and the high-entropy alloy powder is made by vibratory grinding, and then prefabricated ...

Embodiment 2

[0038] A high-entropy alloy material and a preparation method thereof, comprising the following steps:

[0039] High-entropy alloy powder, the amount of each component is: 20% Cu, 20% Ta, 20% Nb, 20% Hf, 20% Zr.

[0040] (1) Calculate the mass of each component according to the atomic ratio, and then accurately weigh each component, and then use a vacuum arc melting furnace to perform repeated melting for 5 times to obtain a block high-entropy alloy.

[0041] (2) The massive high-entropy alloy obtained in step (1) is pulverized by a vibrating mill, and sieved to obtain 200-400 mesh high-entropy alloy powder.

[0042] (3) Polish the pure copper substrate to remove the oxide layer, and then clean it with alcohol.

[0043] (4) The alloy powder material obtained in step (2) is made into a paste using absolute ethanol as a binding agent, and evenly prefabricated on the surface of the base material after step (3) to form a prefabricated layer. The thickness of the prefabricated pow...

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Abstract

The invention discloses a high-entropy alloy material and a preparation method thereof, and belongs to the field of surface engineering. The preparation method comprises the following steps that high-entropy alloy powder is prepared; a copper matrix is pretreated; the high-entropy alloy powder is preset on the surface of the pretreated copper matrix to obtain a preset copper-based alloy powder layer; after laser preheating to 450 DEG C is carried out on the preset copper-based alloy powder layer, laser cladding machining is adopted; and the high-entropy alloy comprises the following componentsof, in percentage by atomic, 15%-20% of Cu, 20%-23% of Ta, 20%-22% of Nb, 20% of Hf and 20% of Zr, and the sum of the mass percent of all the components is 100%. The prepared high-entropy alloy powder can solve the problems that in the laser additive manufacturing process of high-melting-point metal simple substance powder, due to the large melting point difference, the burning loss rates of different elements are different, and component microscopic segregation is caused by multiple elements, and the material has the characteristics of high hardness, strong heat resistance and the like, andhas great research and application prospects.

Description

technical field [0001] The invention belongs to the field of surface engineering, and relates to a high-entropy alloy material and a preparation method thereof. Background technique [0002] Traditional metal alloys are generally one-element or binary alloys, that is, one or two elements are used as the main component, and then the structure and properties of the material are improved by adding other elements, such as steel, aluminum alloy, titanium alloy, magnesium alloy, copper alloy etc. Too many components in traditional alloys tend to form complex intermetallic compounds and other complex phase structures, which often lead to deterioration of alloy properties and limit the development and practical application of traditional alloy systems. [0003] High-entropy alloy is a new type of alloy. Its concept was proposed by Taiwan scientist Ye Junwei and other researchers in 2004. High-entropy alloy uses five or more elements as the main components, and the atomic ratio of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C23C24/10
CPCC22C30/02C23C24/106
Inventor 战再吉曹海要徐亮亮
Owner YANSHAN UNIV
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