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A kind of preparation method of high-entropy alloy layer on the surface of tungsten alloy

A high-entropy alloy, tungsten alloy technology, applied in metal material coating process, coating, solid-state diffusion coating and other directions, can solve the problem of low oxidation resistance, achieve good bonding force, excellent high temperature mechanical properties and radiation resistance effect of lighting

Active Publication Date: 2022-02-18
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem of low oxidation resistance when tungsten is applied to the first wall structure material of high-temperature plasma, the present invention provides a method for preparing a high-entropy alloy layer on the surface of tungsten alloy. Prepare a layer of uniform and dense high-entropy alloy permeation coating, which can not only ensure good bonding force with the substrate, but also ensure excellent high-temperature oxidation resistance and radiation resistance

Method used

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  • A kind of preparation method of high-entropy alloy layer on the surface of tungsten alloy
  • A kind of preparation method of high-entropy alloy layer on the surface of tungsten alloy
  • A kind of preparation method of high-entropy alloy layer on the surface of tungsten alloy

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Embodiment 1

[0024] The source preparation method used in the example is: firstly, prepare several four metal rods of Ta, W, V and Cr with the same size; The spacing is the same, and finally the four kinds of metal rods are inserted into the holes of the pure titanium plate in a circular arrangement in equal proportions to prepare the alloy source. The specific arrangement is: the four elements of Ta, W, V, and Cr are recorded as 1, 2, 3, and 4 respectively, and the metal rods start from the first hole in the upper left corner of the titanium plate, and arrange them around in the order of 123423413412412312342341... , and finally all over the whole titanium plate. During the experiment, the prepared source target was placed below, and the tungsten alloy workpiece fixture was placed above the target.

[0025] (1) Surface pretreatment of tungsten alloy workpieces: After degreasing the surface of tungsten alloy workpieces, use water abrasive paper to polish and polish step by step, use aceto...

Embodiment 2

[0032] The difference between this embodiment and Example 1 is that the working temperature in step (4) is 1100°C, and other steps and parameters are the same as in Example 1.

Embodiment 3

[0034] The difference between this embodiment and Example 1 is that the working temperature in step (4) is 1200° C., and other steps and parameters are the same as in Example 1.

[0035] The treated tungsten-based alloy materials obtained in Example 1, Example 2 and Example 3 are subjected to XRD phase testing and bonding force testing. Under the above-mentioned process conditions, a high-entropy alloy layer can be prepared on the surface of the tungsten alloy, and the alloy coating and The bonding force of the matrix is ​​good. figure 1 Shows the X-ray diffraction pattern of the W-Ta-V-Cr high-entropy alloy layer after the surface alloying treatment of the tungsten substrate, figure 2 Show the load-acoustic emission signal, load-friction coefficient curve of tungsten alloy after the processing of embodiment 1, image 3 Show the load-acoustic emission signal, load-friction coefficient curve of tungsten alloy after processing in embodiment 2, Figure 4 The load-acoustic emis...

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Abstract

A method for preparing a high-entropy alloy layer on the surface of a tungsten alloy belongs to the field of surface modification of metal materials, and can solve the problems of low oxidation resistance and insufficient radiation resistance when tungsten is applied to magnetic confinement nuclear fusion devices facing plasma materials. A uniform and dense Ta-W-V-Cr high-entropy alloy composite coating was prepared on the surface of tungsten alloy by using double-layer glow plasma surface metallurgy technology, changing the coating temperature, holding time and source placement method. The metal rods of Ta, W, V and Cr are inserted on the surface of the pure titanium plate by the arrangement and combination method as the source electrode for the preparation of the high-entropy alloy layer. The high-entropy alloy infiltration layer formed on the surface of the tungsten-based material is composed of an alloy diffusion layer and a deposition layer with a gradient change in concentration. It has good bonding force with the substrate, and has good thermophysical properties, thermodynamic properties and particle radiation resistance. The invention is suitable for the plasma-facing material of the magnetic confinement nuclear fusion device, and provides a new material solution for the selection of the first wall of the controlled nuclear fusion device.

Description

technical field [0001] The invention belongs to the technical field of surface modification of metal materials, and in particular relates to a preparation method of a high-entropy alloy layer on the surface of a tungsten alloy. Background technique [0002] Energy is the material basis of human activities, while fossil fuels and other traditional energy sources are limited and will be exhausted in the foreseeable future, and they have brought severe environmental problems. Renewable energy as its alternative energy includes solar energy, wind energy, tidal energy, biomass energy, etc. Although there are many advantages, there are also problems such as low efficiency. Fission energy has environmental and safety problems, and the fission resource uranium reserves are limited, so it can only be used as a transitional energy source. Controlled thermonuclear fusion energy is an ideal clean energy that hardly causes environmental problems such as radioactive pollution. Its fuel d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/14C23C10/02
CPCC23C10/14C23C10/02
Inventor 秦林吴玉程薛海龙田林海林乃明王振霞赵鹏飞
Owner TAIYUAN UNIV OF TECH