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Rare earth element high-entropy alloy material and preparing method thereof

A high-entropy alloy and rare earth element technology, applied in the field of materials, can solve problems such as staying in the initial stage, and achieve the effect of simple operation and easy implementation

Inactive Publication Date: 2019-12-20
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research on rare earth high-entropy alloy materials with a single-phase hexagonal close-packed structure and how to use the mixing law to predict the performance data of such high-entropy alloys is still at the initial stage

Method used

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  • Rare earth element high-entropy alloy material and preparing method thereof
  • Rare earth element high-entropy alloy material and preparing method thereof
  • Rare earth element high-entropy alloy material and preparing method thereof

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Embodiment 1

[0029] This implementation adopts the arc melting process to manufacture ScYLaCePrNdSmGdTbDyHoErTmLu high-entropy alloy materials according to the following steps:

[0030] (1) Weigh 14 kinds of rare earth element raw materials according to the equiatomic ratio.

[0031] (2) Put the raw materials of each element in the order of melting point from low to high (Ce, La, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Y, Er, Sc, Tm, Lu) into the copper of the arc melting furnace. molded crucible, and then evacuated to a vacuum degree lower than 1.5×10 -3 MPa, and then filled with argon gas with a purity of 99.9% to a pressure of 0.5 MPa in the non-consumable arc melting furnace.

[0032] (3) Arc smelting, the current is 150A during smelting, repeated smelting 5 times, and the melting furnace body should be cleaned immediately after each smelting. After the smelting is finished, there is no need for suction casting, and the rare earth element high-entropy alloy material can be obtained after the cop...

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Abstract

The invention discloses a rare earth element high-entropy alloy material and a preparing method thereof, and belongs to the field of materials. The alloy material is a closely-packed hexagonal structure high-entropy alloy composed of fourteen rare earth elements (ScYLaCePrNdSmGdTbDyHoErTmLu) matched and smelted according to the atomic ratio. The high-entropy alloy is prepared from the fourteen rare earth elements (scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, gadolinium, terbium, dysprosium, holmium, erbium, thulium and lutetium) and has the advantages of the high element number and the single-phase closely-packed hexagonal structure of material crystals, the mechanical performance and crystal lattice constant of the material meet the high-entropy alloy mixing rule, the solution strengthening is realized to a certain extent, and the whole experimental process is easy to operate and implement.

Description

technical field [0001] The invention relates to a rare earth element high-entropy alloy material and a preparation method thereof, belonging to the field of materials. Background technique [0002] High-entropy alloys were proposed and studied by Ye Junwei and others in the 1990s. The main idea is to design alloys through multiple elements, breaking the shackles of traditional alloys with a single element as the main component. High-entropy alloys refer to solid solutions composed of five or more elements, each of which accounts for 5% to 35% of the total number of atoms. Since no element contains more than 50%, high-entropy alloys have no main components. The types of alloys are divided according to the mixing entropy, and the mixing entropy of high-entropy alloys ( R is the gas molar constant). [0003] Previous studies have shown that the properties of high-entropy alloys can use the law of mixing to explain the deviation of measured values ​​caused by the complex agg...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
CPCC22C1/02C22C30/00
Inventor 乔珺威石晓辉曹佳盟鲍美林张敏王雪姣吴玉程
Owner TAIYUAN UNIV OF TECH
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