Preparation method of ceramic particle reinforced refractory high-entropy alloy

A high-entropy alloy, ceramic particle technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of low process efficiency, complex process flow, low powder yield, etc., and achieve simple process flow, low cost, ball milling, etc. short time effect

Pending Publication Date: 2022-07-29
HENAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Mechanical alloying is currently the most commonly used preparation process for the preparation of refractory high-entropy alloys by powder metallurgy, but the mechanical alloying process takes a long time, generally more than 50 hours
If you choose to add ball milling media, the process will be more complicated, if you choose not to add ball milling media, the powder yield will be low, so the process efficiency is not high

Method used

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  • Preparation method of ceramic particle reinforced refractory high-entropy alloy
  • Preparation method of ceramic particle reinforced refractory high-entropy alloy
  • Preparation method of ceramic particle reinforced refractory high-entropy alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Ball milling mixing: 99.5 g of metal powder and nano-ZrO mixed with equal molar ratios of W powder, Mo powder, Nb powder, Ta powder and V powder are used 2 0.5g of particles was used as a raw material, without adding a ball milling medium, ball milling and mixing were carried out in a planetary ball mill. Among them, the particle size of W powder and Ta powder are both less than 0.035mm, the particle size of Mo powder and Nb are less than 0.045mm, and the particle size of nano ZrO 2 The particle size is less than 30nm; the purity of W powder, Mo powder, Nb powder, Ta powder and V powder are all greater than 99.9%, nano ZrO 2 The purity is greater than 99.99%. The material of the ball mill jar and the grinding balls are WC cemented carbide. The inside of the ball mill jar is evacuated and high-purity argon gas is introduced as a protective atmosphere. In the process of ball milling, the ball-to-material ratio is 10:1, the ball milling speed is 300r / min, the operati...

Embodiment 2

[0032] (1) Ball milling mixing: 99g of metal powder and nano ZrO mixed with equal molar ratio of W powder, Mo powder, Nb powder, Ta powder and V powder are used 2 1 g of particles was used as a raw material, and ball milling was carried out in a planetary ball mill without adding a ball milling medium. The particle size of W powder and Ta powder are all less than 0.035mm, the particle size of Mo powder, Nb powder and V powder are all less than 0.045mm, and the particle size of nano ZrO powder is less than 0.045mm. 2 The particle size is less than 30nm; the purity of W powder, Mo powder, Nb powder, Ta powder and V powder are all greater than 99.9%, nano ZrO 2 The purity is greater than 99.99%. The material of the ball mill jar and the grinding balls are WC cemented carbide. The inside of the ball mill jar is evacuated and high-purity argon gas is introduced as a protective atmosphere. In the process of ball milling, the ball-to-material ratio is 12:1, the ball milling speed i...

Embodiment 3

[0037] (1) Ball milling mixing: 99g of metal powder and nano ZrO mixed with equal molar ratio of W powder, Mo powder, Nb powder, Ta powder and V powder are used 2 1 g of particles was used as a raw material, and ball milling was carried out in a planetary ball mill without adding a ball milling medium. The particle size of W powder and Ta powder are all less than 0.035mm, the particle size of Mo powder, Nb powder and V powder are all less than 0.045mm, and the particle size of nano ZrO powder is less than 0.045mm. 2 The particle size of the powder is less than 30nm; the purity of W powder, Mo powder, Nb powder, Ta powder and V powder are all greater than 99.9%, and nano ZrO powder 2 The purity is greater than 99.99%. The material of the ball mill jar and the grinding balls are WC cemented carbide. The inside of the ball mill jar is evacuated and high-purity argon gas is introduced as a protective atmosphere. In the process of ball milling, the ball-to-material ratio is 15:1,...

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Abstract

The invention relates to a preparation method of a ceramic particle reinforced refractory high-entropy alloy, which comprises the following steps of: ball-milling and mixing metal powder formed by mixing W powder, Mo powder, Nb powder, Ta powder and V powder with equal molar ratio or nearly equal molar ratio and nano ZrO2 particles in a high-energy ball mill to obtain mixed powder; and the obtained mixed powder is placed in a graphite mold, pressure sintering is conducted in a high-vacuum state through a spark plasma sintering method, and the nano ZrO2 reinforced WMoNbTaV refractory high-entropy alloy is obtained. The method is simple in technological process, low in cost and high in efficiency, the nano ZrO2 particles are introduced into the WMoNbTaV matrix, the strength and plasticity of the WMoNbTaV refractory high-entropy alloy are improved, compared with the prior art, the room-temperature plasticity of the WMoNbTaV refractory high-entropy alloy is greatly improved, and the problems that component segregation and long mechanical alloying test period caused by an existing casting method preparation technology are effectively solved, and the mechanical alloying performance of the WMoNbTaV refractory high-entropy alloy is greatly improved are solved. And the powder yield is low.

Description

technical field [0001] The invention belongs to the technical field of advanced metal material preparation, in particular to a preparation method of a ceramic particle reinforced refractory high-entropy alloy. Background technique [0002] Traditional alloys are based on one or two elements, and the design concept of changing or optimizing performance by adding a small amount of metal or other elements can no longer meet the needs of current technological development. A new type of alloy is urgently needed to break the deadlock. A new design concept that has gained popularity in the last two decades is the idea of ​​combining a number of major elements to form new materials called high-entropy alloys. Different from traditional alloys, high-entropy alloys are composed of a variety of alloying elements in equimolar or nearly equimolar ratios, and have many unique properties, making them a new type of alloy with great potential. High-entropy alloys composed of refractory meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/054B22F1/06B22F3/105B22F9/04C22C30/00
CPCC22C30/00B22F9/04B22F3/105B22F3/1007B22F2009/043B22F2003/1051
Inventor 徐流杰宗乐魏世忠赵云超田高龙罗春阳李洲潘昆明李秀青周玉成王长记王喜然
Owner HENAN UNIV OF SCI & TECH
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