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A powder metallurgy high-strength and toughness boron-containing high-entropy alloy material and its preparation method and application

A high-strength toughness, high-entropy alloy technology, applied in the field of powder metallurgy high-strength toughness boron-containing high-entropy alloy materials and its preparation, can solve the problems that high-melting point elements cannot be fully dissolved, elements are difficult to distribute evenly, and affect alloy performance. The effect of high volume density, uniform particle size and high purity

Active Publication Date: 2022-03-25
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the existing research results, high-entropy alloys usually form a solid solution with each other to form a small amount of intermetallic compounds, and these intermetallic compounds will destroy the matrix of the alloy and affect the properties of the alloy.
The current smelting preparation method commonly used in high-entropy alloys, due to the different melting points of elements, leads to the volatilization of low-melting point elements or the inability to fully dissolve high-melting point elements during the smelting process, and the elements are difficult to distribute evenly. Therefore, to reduce the formation of intermetallic compounds in high-entropy alloys, It is particularly important to improve the performance of the alloy

Method used

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  • A powder metallurgy high-strength and toughness boron-containing high-entropy alloy material and its preparation method and application
  • A powder metallurgy high-strength and toughness boron-containing high-entropy alloy material and its preparation method and application
  • A powder metallurgy high-strength and toughness boron-containing high-entropy alloy material and its preparation method and application

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Effect test

Embodiment 1

[0025] A powder metallurgy high-strength-toughness boron-containing high-entropy alloy material and a preparation method thereof, the high-strength-toughness boron-containing high-entropy alloy AlFeNiCoCrB x Y z (x=1, z=0.1) The powder is composed of Al, Fe, Ni, Co, Cr, B and Y elements, and the molar ratio of each element is 1:1:1:1:1:1:1:0.1. The corresponding molar amount of powder was weighed in a glove box under argon environmental protection, and the mixed powder was placed in a tungsten carbide ball mill jar, and tungsten carbide grinding balls were placed in the jar, and then 8ml of anhydrous ethanol was added. , and perform ball milling in a high-energy ball mill. The ball milling process parameters are as follows: the rotational speed is 875 rpm, the ball milling time is 60 hours, and the ball mill is stopped for 20 minutes after each 1 hour of ball milling; Centrifuge in an ultracentrifuge, take out the top 1 / 3 layer of liquid, ultrasonicate the remaining liquid fo...

Embodiment 2

[0028] A powder metallurgy high-strength-toughness boron-containing high-entropy alloy material and a preparation method thereof, the high-strength-toughness boron-containing high-entropy alloy AlFeNiCoCrB x Y z (x=1, z=0.2) The powder is composed of Al, Fe, Ni, Co, Cr, B and Y elements, and the molar ratio of each element is 1:1:1:1:1:1:1:0.2. The corresponding molar amount of powder was weighed in a glove box under argon environmental protection, and the mixed powder was placed in a tungsten carbide ball mill jar, and tungsten carbide grinding balls were placed in the jar, and then 8ml of anhydrous ethanol was added. , and perform ball milling in a high-energy ball mill. The ball milling process parameters are as follows: the rotational speed is 875 rpm, the ball milling time is 60 hours, and the ball mill is stopped for 20 minutes after each 1 hour of ball milling; Centrifuge in an ultracentrifuge, take out the top 1 / 3 layer of liquid, ultrasonicate the remaining liquid fo...

Embodiment 3

[0031] A powder metallurgy high-strength-toughness boron-containing high-entropy alloy material is prepared according to the following preparation method: high-strength-toughness boron-containing high-entropy alloy AlFeNiCoCrB x Y z (x=1, z=0.3) The powder is composed of Al, Fe, Ni, Co, Cr, B and Y elements, and the molar ratio of each element is 1:1:1:1:1:1:1:0.3. The corresponding molar amount of powder was weighed in a glove box under argon environmental protection, and the mixed powder was placed in a tungsten carbide ball mill jar, and tungsten carbide grinding balls were placed in the jar, and then 8ml of anhydrous ethanol was added. , and perform ball milling in a high-energy ball mill. The ball milling process parameters are as follows: the rotational speed is 875 rpm, the ball milling time is 60 hours, and the ball mill is stopped for 20 minutes after each 1 hour of ball milling; Centrifuge in an ultracentrifuge, take out the top 1 / 3 layer of liquid, sonicate the rem...

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Abstract

The invention belongs to the field of high-strength-toughness high-entropy alloy boride, and discloses a powder metallurgy high-strength-toughness boron-containing high-entropy alloy material and a preparation method and application thereof. The method first completes mechanical alloying by ball milling and adding dispersant to obtain nearly spherical high-entropy alloy powder with uniform particle size; ultracentrifugation and ultrasonic treatment are performed on the obtained powder to ensure the dispersion of the powder, and the reciprocating cycle is performed until the powder The particle size is less than 5 μm; the dispersant is then removed by rotary evaporation, and then dried; the powder obtained by drying is subjected to spark plasma sintering at a heating rate of 30 to 200 °C / min, at 800 to 1700 °C, and the axial pressure is 0 ~ Sintered at 50Mpa to obtain a block to obtain a powder metallurgy high-strength and tough boron-containing high-entropy alloy material. The high-strength-toughness boron-containing high-entropy alloy block prepared by the invention has few boride phases precipitated and no bulk segregation, and has high density, strong toughness and high hardness.

Description

technical field [0001] The invention belongs to the field of high-strength-toughness high-entropy alloy boride, in particular to a powder metallurgy high-strength-toughness boron-containing high-entropy alloy material and a preparation method and application thereof. Background technique [0002] High-entropy alloy is a new type of multi-principal alloy, its microstructure and mechanical properties are better than traditional alloys. Therefore, in recent years, more and more attention has been paid to the research of high-entropy alloy materials, and more and more scholars have devoted themselves to the research of high-entropy alloy materials. Different from traditional alloys, high-entropy alloys are composed of at least 5 kinds of alloys, and the atomic percentage of each main element is not higher than 35%. High-entropy alloys often exhibit properties such as high strength, high hardness, temper softening resistance, and corrosion resistance. And because high-entropy a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F9/04C22C30/00C22C1/05
CPCB22F3/105B22F9/04C22C30/00C22C1/05B22F2009/043
Inventor 龙莹车金涛黄路江赵成材吴宗林华泰
Owner GUANGDONG UNIV OF TECH