Quaternary high-entropy alloy containing nano-particle structure and preparation method of quaternary high-entropy alloy

A nanoparticle and high-entropy alloy technology, applied in the field of high-entropy alloy materials, can solve the problems of quaternary high-entropy alloy mechanical properties, element segregation, and complex mixing enthalpy

Pending Publication Date: 2022-01-14
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the five-element high-entropy alloy has lower fluidity than the four-element, the mixing enthalpy between elements in the system is more complicated, and the distribution of elements is less affected by the mixing enthalpy between elements, so the traditional melting of five-element high-entropy alloys in The preparation process will not affect its structure, which can make the five-element high-entropy alloy have higher strength and good ductility; and the

Method used

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  • Quaternary high-entropy alloy containing nano-particle structure and preparation method of quaternary high-entropy alloy
  • Quaternary high-entropy alloy containing nano-particle structure and preparation method of quaternary high-entropy alloy
  • Quaternary high-entropy alloy containing nano-particle structure and preparation method of quaternary high-entropy alloy

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preparation example Construction

[0028] The present invention provides a method of preparing a quadroyan high entropy alloy containing a nanoparticle structure, comprising the steps of:

[0029] The raw materials are sequentially placed in the order of the raw material from low to high, and then the smelting is cooled, and the four-dimensional high entropy alloy containing the nanoparticle structure is obtained; the number of smelts is 3 to 6 times; each melting The rear cooling mode is water cooled; the quaternary high entropy alloy is an aluminum-chromium ferri-nickel tetra-high entropy alloy.

[0030] In the present invention, the tetram high entropy alloy is an aluminum-chromium ferri-nickel tetram high entropy alloy, and the atomic ratio of aluminum chromium ferriite in the high entropy alloy alloy is 1: 1: 1: 1. In the present invention, the feedstock preferably includes aluminum particles, chromium particles, iron particles, and nickel particles. The present invention has no particular limitation of the pa...

Embodiment 1

[0046] A method of preparing a quadroyan high entropy alloy containing a nanoparticle structure, which consists of the following steps:

[0047] (1) According to the atomic ratio of aluminum chromium ferri, it is 1: 1: 1: 1, the aluminum particles are 6.966 ± 0.001 g, chromium particles 13.424 ± 0.001G, iron particles 14.458 ± 0.001G and nickel particles 15.152 ± 0.001G, will Aluminum particles, chromium particles, iron particles and nickel particles are placed in a beaker, and anhydrous ethanol is added, and the magnetic vibration device is used to clean 35min, and then the mixture of acetone and anhydrous ethanol is easily washed 20 min, and the feedstock after cleaning It is dried in a vacuum drying box, dried at 200 ° C, drying time 30 min, resulting in a raw material;

[0048] (2) Wipe the molten pool and water-cooled copper mold assist in vacuum arc melting furnace with anhydrous ethanol, and the inner wall of the furnace cavity, then use the grinding wheel to polish the tip...

Embodiment 2

[0063] The high purity argon was charged in step (2) to maintain 0.9 pneumatic pressure in the furnace, other conditions and Example 1.

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Abstract

The invention provides a quaternary high-entropy alloy containing a nano-particle structure and a preparation method of the quaternary high-entropy alloy, and belongs to the technical field of high-entropy alloy materials. According to the quaternary high-entropy alloy containing the nano-particle structure and the preparation method of the quaternary high-entropy alloy, raw materials are sequentially placed from bottom to top according to the sequence of the melting points of the raw materials from low to high, then smelting is conducted, cooling is conducted, and the quaternary high-entropy alloy containing the nano-particle structure is obtained; the number of times of smelting is 3-6; the cooling mode after each time of smelting is water cooling; and the quaternary high-entropy alloy is an aluminum-chromium-iron-nickel quaternary high-entropy alloy. According to the quaternary high-entropy alloy containing the nano-particle structure and the preparation method of the quaternary high-entropy alloy, the melt cooling rate is increased in a water cooling mode, the cooling time is shortened, and element segregation is controlled, so that the quaternary high-entropy alloy has high compressive strength and good ductility; and the result of the embodiment shows that the aluminum-chromium-iron-nickel quaternary high-entropy alloy has the hardness of 247.76 HV, the compressive strength of 1807.01 MPa, the yield strength of 1205.08 MPa and the elongation of 16.21%.

Description

Technical field [0001] The present invention relates to the field of high entropy alloy material, and more particularly to a quadritical high entropy alloy containing a nanoparticle structure and a preparation method thereof. Background technique [0002] High entropy alloy is an alloy formed from a variety of equivalents or approximately equal metals, because high entropy alloys may have many ideal properties, so it is quite important in material science and engineering. The traditional five-dimensional high entropy alloy currently studied often uses high-cost elements such as cobalt, titanium, and has severely restricted the application and development of high entropy alloys. Therefore, there will be very important to prepare a high-quality structure and have a good mechanical properties. Since the five-yuan high entropy alloy has a lower liquidity compared to four yuan, the mixing enthalpy between the internal elements is relatively complicated, and the distribution of element...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
CPCC22C30/00C22C1/02
Inventor 文志勤王鸣泽王茗邹正光刘俊霄马博
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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