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WNbTaMoV high-entropy alloy and preparation method thereof

A high-entropy alloy and a single technology, applied in the field of WNbTaMoV high-entropy alloy and its preparation, can solve the problems of expensive preparation time and high energy consumption of equipment, and achieve the effect of rapid preparation and low energy consumption

Active Publication Date: 2016-08-24
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional preparation process of high-entropy alloys is generally prepared by heating smelting or electrochemical deposition. The two types of preparation methods have high selectivity to the selected components, expensive equipment, long preparation time, and high energy consumption.

Method used

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  • WNbTaMoV high-entropy alloy and preparation method thereof
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  • WNbTaMoV high-entropy alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] WO 3 , Nb 2 o 5 、 Ta 2 o 5 、MoO 3 , V powder and Al powder are fully mixed and dried to obtain thermite; the atomic molar ratio of each raw material powder in the thermite is W:Nb:Ta:Mo:V:Al=2:2:2: 2:2:14; the thermite powder is naturally loosely packed into a graphite crucible, and then the graphite crucible is placed at an acceleration of 10000m / s 2 In the supergravity field, the aluminothermic reaction is induced by electric ignition; after the reaction, the product is naturally divided into two layers, the upper layer is a porous alumina ceramic layer, and the lower layer is a WNbTaMoV high-entropy alloy with residual alumina ceramics. The WNbTaMoV Some alumina impurities remain in the high-entropy alloy. The alumina ceramics in the upper layer are peeled off to obtain the WNbTaMoV high-entropy alloy in the lower layer containing more alumina impurities.

Embodiment 2

[0036] WO 3 , Nb 2 o 5 、 Ta 2 o 5 、MoO 3 , V powder and Al powder are fully mixed and dried to obtain thermite; the atomic molar ratio of each raw material powder in the thermite is W:Nb:Ta:Mo:V:Al=2:2:2: 2:2:14; Press the thermite into a powder compact with a pressure of 35MPa, then put the powder compact into a graphite crucible, and place the graphite crucible at an acceleration of 10000m / s 2 In the supergravity field, the aluminothermic reaction is induced by electric ignition; after the reaction, the product is naturally divided into two layers, the upper layer is alumina ceramics, and the lower layer is WNbTaMoV high-entropy alloy, and a small amount of aluminum oxide remains in the upper layer of the WNbTaMoV high-entropy alloy Impurities. The alumina ceramics in the upper layer are peeled off, the alumina impurities in the upper layer of the WNbTaMoV high-entropy alloy are removed, and the lower layer of the WNbTaMoV high-entropy alloy is obtained.

[0037] Depe...

Embodiment 3

[0042] WO 3 , Nb 2 o 5 、 Ta 2 o 5 、MoO 3 , V powder and Al powder are fully mixed and dried to obtain thermite; the atomic molar ratio of each raw material powder in the thermite is W:Nb:Ta:Mo:V:Al=2:2:2: 2:2:15; Press the thermite into a powder compact with a pressure of 35MPa, then put the powder compact into a graphite crucible, and place the graphite crucible at an acceleration of 10000m / s 2 In the supergravity field, the aluminothermic reaction is induced by electric ignition; after the reaction, the product is naturally separated into two layers, the upper layer is alumina ceramics, and the lower layer is WNbTaMoV high-entropy alloy, and a small amount of aluminum oxide remains in the upper layer of the WNbTaMoV high-entropy alloy Impurities. The upper layer of alumina ceramics is peeled off, and the aluminum oxide impurities in the upper layer of the WNbTaMoV high-entropy alloy are removed to obtain the lower layer of WNbTaMoV high-entropy alloy. The crystal stru...

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Abstract

The invention provides WNbTaMoV high-entropy alloy. The WNbTaMoV high-entropy alloy is composed of the elements of W, Nb, Ta, Mo and V and is of a single body-centered cubic structure. The invention further provides a preparation method of the WNbTaMoV high-entropy alloy. According to the preparation method of the WNbTaMoV high-entropy alloy, aluminothermic reaction in the combustion synthesis technology is combined with the hypergravity field separation technology, the preparation process is free of pollution and low in energy consumption, and the high-compactness WNbTaMoV high-entropy alloy can be rapidly prepared.

Description

technical field [0001] The invention relates to a WNbTaMoV high-entropy alloy and a preparation method thereof, belonging to the technical field of alloy materials and preparation thereof. Background technique [0002] Multi-principal element high-entropy alloy is a material prepared by a new material design concept. Multi-principal element high-entropy alloy generally contains 5 or more elements, and the content of each element is 5%-35%. The atomic percentage content of elements is basically the same. The high entropy effect caused by multi-principal elements effectively inhibits the appearance of intermetallic compounds, effectively reduces the brittleness of alloys caused by multi-principal elements, and is conducive to the formation of simple crystal phases, and makes the microstructure of the alloy tend to be nano-sized, easy to obtain nanostructured materials. [0003] The traditional preparation process of high-entropy alloys is generally prepared by heating smelti...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C30/00
CPCC22C1/058C22C27/04C22C30/00
Inventor 李江涛杨增朝刘光华贺刚杨潇郭世斌
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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