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Five tungsten-based high-entropy alloys and preparation method thereof

A high-entropy alloy and alloy technology, which is applied in the field of high-entropy alloy and tungsten alloy material, can solve the problems of poor plasticity and unfavorable application, and achieve the effect of excellent compression resistance and high application value.

Inactive Publication Date: 2020-06-09
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to: the existing tungsten-containing high-entropy alloys have poor plasticity at room temperature, and almost all contain elements with high neutron activation coefficients such as Nb and Mo, which is extremely unfavorable for future use in international thermonuclear fusion reactors. Application problems, providing a tungsten-based high-entropy alloy and its preparation method

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  • Five tungsten-based high-entropy alloys and preparation method thereof
  • Five tungsten-based high-entropy alloys and preparation method thereof
  • Five tungsten-based high-entropy alloys and preparation method thereof

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Effect test

Embodiment 1

[0047] Embodiment 1 WVTi high entropy alloy

[0048] The preparation process of the tungsten-based high-entropy alloy of this embodiment is as follows.

[0049] (1) Powder pre-sintering

[0050] W, V and Ti are used as three kinds of powder raw materials, and they are configured according to the weight ratio of W:V:Ti=65.07:18.01:16.93, and the total mass is 100g. Seal the prepared powder raw material in a stainless steel drum with a diameter of 100 mm and a height of 150 mm, and fill it with high-purity argon gas with a purity of 99.999% by weight before sealing. Then, ball milling and dry mixing were carried out at a drum speed of 30 rpm for 10 hours to obtain a ball milling mixture. Afterwards, the ball-mill mixture was pressed for 15 min under a pressure of 180 MPa to make a powder compact. Then sinter the powder compact in a vacuum furnace at 1470-1500°C for 50 minutes to obtain a sintered sample of the alloy.

[0051] (2) Alloy smelting

[0052] Cut the sintered sam...

Embodiment 2

[0055] Embodiment 2 WVTiTa high entropy alloy

[0056] The preparation process of the tungsten-based high-entropy alloy of this embodiment is as follows.

[0057] (1) Powder pre-sintering

[0058] Using W, V, Ti, Ta four kinds of powder raw materials, according to the weight ratio of W: V: Ti: Ta = 39.66: 10.99: 10.33: 39.03 configuration, the total mass is 200g. Seal the prepared powder raw material in a stainless steel drum with a diameter of 100 mm and a height of 150 mm, and fill it with high-purity argon gas with a purity of 99.999% by weight before sealing. Then, ball milling and dry mixing were carried out at a drum speed of 30 rpm for 10 hours to obtain a ball milling mixture. Afterwards, under the pressure of 180 MPa, the obtained ball-milled mixture was pressed for 15 minutes to make a powder compact. Then sinter the powder compact in a vacuum furnace at 1470-1500°C for 50 minutes to obtain a sintered sample of the alloy.

[0059] (2) Alloy smelting

[0060] Cut...

Embodiment 3

[0063] Embodiment 3 WVTiTaRe high entropy alloy

[0064] The preparation process of the tungsten-based high-entropy alloy of this embodiment is as follows.

[0065] (1) Powder pre-sintering

[0066] Five powder materials of W, V, Ti, Ta, and Re are used, and they are configured according to the weight ratio of W:V:Ti:Ta:Re=28.29:7.84:7.37:27.85:28.65, with a total mass of 300g. Seal the prepared powder raw material in a stainless steel drum with a diameter of 100 mm and a height of 150 mm, and fill it with high-purity argon gas with a purity of 99.999% by weight before sealing. Then, ball milling and dry mixing were carried out at a drum speed of 30 rpm for 10 hours to obtain a ball milling mixture. Afterwards, under the pressure of 180 MPa, the obtained ball-milled mixture was pressed for 15 minutes to make a powder compact. Then sinter the powder compact in a vacuum furnace at 1470-1500°C for 50 minutes to obtain a sintered sample of the alloy.

[0067] (2) Alloy smeltin...

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Abstract

The invention discloses tungsten-based high-entropy alloys and a preparation method thereof, belongs to the field of high-entropy alloys and tungsten alloy materials, in particular to the field of a first wall material facing plasma in a thermonuclear fusion reactor, and aims to solve the problems that existing tungsten-containing high-entropy alloys are poor in plasticity at normal temperature and almost contain high-neutron activation coefficient elements such as Nb and Mo, which are very unfavorable for future application in the international thermonuclear fusion reactor. The tungsten-basedhigh-entropy alloys are one or more of a W-V-Ti alloy, a W-V-Ta alloy, a W-Ti-Ta alloy, a W-Ti-V-Ta alloy and a W-Ti-V-Ta-Re alloy. Tests show that a single body-centered cubic structure is formed intypical alloys of five tungsten high-entropy alloy systems, and some alloys have excellent compression resistance. Meanwhile, the problem that the existing tungsten-containing high-entropy alloys almost contain the high-neutron activation coefficient elements is effectively solved, the contained elements of the tungsten-based high-entropy alloys have a low neutron activation coefficient, and thetungsten-based high-entropy alloys are beneficial to future application in the international thermonuclear fusion reactor and have high application value.

Description

technical field [0001] The invention relates to the field of high-entropy alloys and tungsten alloy materials, especially the field of first wall materials facing plasma in thermonuclear fusion reactors, specifically tungsten-based high-entropy alloys and a preparation method thereof. More specifically, this application provides five new tungsten-based high-entropy alloys and their preparation methods, which are expected to be used as the first wall material facing plasma in thermonuclear fusion reactors, and have high application value. Background technique [0002] Pure tungsten has excellent performance characteristics, such as high melting point, low vapor pressure, low thermal expansion rate, strong ion erosion resistance, no chemical reaction with hydrogen, low hydrogen retention, etc., so it is regarded as the most promising international hot spot. Plasma-facing first wall materials in nuclear fusion reactors. However, this material has certain disadvantages; 1) unde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/03C22C1/04C22C27/04G21B1/13
CPCC22C1/03C22C1/045C22C27/04C22C30/00G21B1/13Y02E30/10
Inventor 黄河黄火根张佳佳俞鑫山石洁法涛徐海燕蒙大桥
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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