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High-entropy boride micro-nano ceramic particles and preparation method thereof

A technology of ceramic particles and micro-nano particles, applied in the field of ceramic materials, can solve the problems of complex operation, high cost, and high equipment requirements, and achieve the effect of simple preparation process and low cost

Inactive Publication Date: 2021-11-30
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used methods for synthesizing high-entropy borides, such as high-energy ball milling (HEBM) and spark plasma sintering (SPS), are complex in operation, require high equipment, high cost, high synthesis temperature, and long synthesis time, which cannot be mass-produced , it is difficult to apply in industrial

Method used

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  • High-entropy boride micro-nano ceramic particles and preparation method thereof
  • High-entropy boride micro-nano ceramic particles and preparation method thereof
  • High-entropy boride micro-nano ceramic particles and preparation method thereof

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Embodiment 1

[0035] A method for preparing high-entropy boride micro-nano ceramic particles, comprising the following steps:

[0036] (1) According to the molar ratio shown in the table, the raw material powders were weighed and mixed to prepare mixed powders with different component contents, and then ball milled. Among them, ball milling speed: 60r / min, ball milling time: 8h, ball material: ZrO 2 , wherein the diameter of the grinding ball is 5mm to 22mm, and the ratio of ball to material is 7:1; after the mixing is completed, weigh about 20g of the mixed powder, wrap it with Al foil, place it in a cylindrical steel mold, and use a hydraulic press to Press into a cylindrical compact with a diameter of about 28 mm and a height of 10 mm to 12 mm.

[0037] According to the molar ratio and composition shown in the table below, respectively select boron powder with a purity greater than or equal to 99.9% and a particle size of about 18 μm; titanium powder with a purity greater than or equal ...

Embodiment 2

[0041] A method for preparing high-entropy boride micro-nano ceramic particles, comprising the following steps:

[0042] (1) According to the molar ratio shown in the table, the raw material powders were weighed and mixed, and prepared into mixed powders with different component contents for ball milling. Among them, ball milling speed: 60r / min, ball milling time: 12h, ball material: ZrO 2 , wherein the diameter of the grinding ball is 5mm to 22mm, and the ratio of ball to material is 15:1; after the mixing is completed, weigh about 20g of the mixed powder, wrap it with Al foil, place it in a cylindrical steel mold, and use a hydraulic press to Press into a cylindrical compact with a diameter of about 28 mm and a height of 10 mm to 12 mm.

[0043] According to the molar ratio and composition shown in the table below, respectively select boron powder with a purity greater than or equal to 99.9% and a particle size of about 18 μm; titanium powder with a purity greater than or e...

Embodiment 3

[0047] A method for preparing high-entropy boride micro-nano ceramic particles, comprising the following steps:

[0048] (1) According to the molar ratio shown in the table, the raw material powders were weighed, mixed, and ball milled. Among them, ball milling speed: 60r / min, ball milling time: 8h, ball material: ZrO 2 , wherein the diameter of the grinding ball is 5mm to 22mm, and the ratio of ball to material is 7:1; after the mixing is completed, weigh about 20g of the mixed powder, wrap it with Al foil, place it in a cylindrical steel mold, and use a hydraulic press to Press into a cylindrical compact with a diameter of about 28 mm and a height of 10 mm to 12 mm.

[0049] According to the molar ratio and composition shown in the table below, respectively select boron powder with a purity greater than or equal to 99.9% and a particle size of about 18 μm; titanium powder with a purity greater than or equal to 99.9% and a particle size of about 29 μm; The diameter is about...

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Abstract

The invention discloses high-entropy boride ceramic particles and a preparation method thereof. The high-entropy boride ceramic is a single-phase solid solution composed of Ti, V, Nb, Zr and B, the chemical formula of the high-entropy boride ceramic is (TiVNb<c>Zr<d>) B2, and the high-entropy boride ceramic is of a hexagonal crystal structure. The numerical range of a, b, c and d is 5%-35%, and a + b + c + d = 1. The invention also provides a preparation method of the high-entropy ceramic particles. The high-entropy boride is prepared by the steps of ball-milling and mixing raw material powder such as metal powder and boron powder, performing high-temperature synthesis reaction, extracting with concentrated hydrochloric acid, drying and the like. The method comprises the steps of: mixing boron powder, titanium powder, vanadium powder, niobium powder and Al-Zr alloy powder, and carrying out ball milling to obtain raw material powder; wrapping the raw material powder with aluminum foil, pressing the raw material powder into a blank, putting the blank into a furnace, heating to a specified temperature (wherein the heating rate is 5-20 DEG C / min, and the specified temperature range is 900-1600 DEG C), keeping the temperature for 10-200 minutes, taking out a sample, and cooling the sample in air; and soaking the sample with concentrated hydrochloric acid to remove impurities, thereby obtaining the high-entropy boride ceramic particles.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a high-entropy boride ceramic particle and a preparation method thereof. Background technique [0002] Boride ceramic particles are widely used in various fields. Boride ceramic particles can be used as an important component of multi-component composite materials to form composite materials with various materials to make various high-temperature resistant parts and functional parts. With the continuous improvement of performance and other requirements, the hardness, oxidation resistance and other properties of traditional single-component compounds are gradually difficult to meet the increasing performance requirements, so it is necessary to develop new boride ceramic particles. Due to the high entropy effect and lattice distortion of multi-component borides, the hardness, oxidation resistance and other properties of multi-component borides are superior to those of si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/04B22F3/04B22F9/04C22C1/05C23F1/20C23F1/44
CPCC01B35/04C23F1/44C23F1/20C22C1/058B22F9/04B22F3/04B22F2009/043C01P2002/72C01P2004/03Y02P20/10
Inventor 赵庆龙苌亭姜启川
Owner JILIN UNIV