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A kind of superhard five-component transition metal carbide single-phase high-entropy ceramic material and preparation method thereof

A technology for transition metals and ceramic materials, applied in the field of superhard ceramic materials, can solve the problems of multi-component carbide oxygen pollution and difficulty in increasing the density, and achieve mutual solid solution, strength and hardness improvement, and density and density. The effect of mechanical properties

Active Publication Date: 2021-09-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing multi-component carbide preparation method is difficult to avoid oxygen pollution and difficult to increase the density, and to provide a superhard five-component transition metal carbide single-phase high-entropy ceramic material preparation method

Method used

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  • A kind of superhard five-component transition metal carbide single-phase high-entropy ceramic material and preparation method thereof
  • A kind of superhard five-component transition metal carbide single-phase high-entropy ceramic material and preparation method thereof
  • A kind of superhard five-component transition metal carbide single-phase high-entropy ceramic material and preparation method thereof

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specific Embodiment approach 1

[0033] Specific embodiment one: the present embodiment is a superhard five-element transition metal carbide single-phase high-entropy ceramic material whose chemical formula is (Ti x1 Zr x2 Nb x3 Ta x4 m x5 ) C; said M is V, Cr, Mo or W; said x1+x2+x3+x4+x5=1.

specific Embodiment approach 2

[0034] Specific embodiment two: This embodiment is a preparation method of a superhard five-component transition metal carbide single-phase high-entropy ceramic material, which is completed according to the following steps:

[0035] 1. Weighing:

[0036] ①. Weigh the metal oxide:

[0037] According to the molar ratio of titanium oxide, zirconium oxide, niobium oxide, tantalum oxide and M oxide is (1~4):(1~4):(1~4):(1~4):(1 ~4) Weighing titanium oxide, zirconium oxide, niobium oxide, tantalum oxide and M oxide respectively to obtain metal oxide;

[0038] ②. Calculate the total amount of reducing carbon powder:

[0039] According to the reaction equation is A x o y +(bx / a+y)C=x / aA a C b+ yCO respectively calculate the amount of reducing carbon powder required for the carbonization reaction of titanium oxide, zirconium oxide, niobium oxide, tantalum oxide and M oxide weighed in step ①, and then add up to obtain The total amount of reducing carbon powder;

[0040] A in the...

specific Embodiment approach 3

[0053] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the titanium oxide described in step one is TiO 2 or Ti 2 o 3 . Other steps are the same as in the second embodiment.

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Abstract

The invention relates to a method for preparing a superhard five-component transition metal carbide single-phase high-entropy ceramic material. The invention belongs to the technical field of superhard ceramic materials, and in particular relates to a method for preparing a superhard single-phase high-entropy ceramic material. The purpose of the invention is to solve the problems that the existing multi-component carbide preparation method is difficult to avoid oxygen pollution and difficult to improve the density. The chemical formula of a superhard five-component transition metal carbide single-phase high-entropy ceramic material is (Ti x1 Zr x2 Nb x3 Ta x4 m x5 ) C. Methods: 1. Weighing; 2. Mixing; 3. Calcining; 4. High temperature sintering; 5. Demolding. The invention improves the density and mechanical properties of the carbide, and the remarkable solid solution strengthening effect and high density significantly improve the hardness of the material. The invention can obtain a superhard five-element transition metal carbide single-phase high-entropy ceramic material.

Description

technical field [0001] The invention belongs to the technical field of superhard ceramic materials, and in particular relates to a preparation method of superhard single-phase high-entropy ceramic materials. Background technique [0002] Superhard materials are widely used in abrasives, cutting tools, wear-resistant coatings, etc. The bulletproof armor ceramics that have been studied in recent years also have high requirements on the hardness of the material. The hardest material known in nature is diamond, but diamond is expensive and difficult to process into complex shapes. Among common ceramic materials, cubic boron nitride (c-BN) has the highest hardness, exceeding 50GPa. Boron carbide (B 4 C) and its composite materials also have high hardness, generally exceeding 30GPa. But c-BN and B 4 C is a strong covalent bond compound, the self-diffusion coefficient is very low during the sintering process, and the material is difficult to sinter and form. In addition, c-BN...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/56C04B35/622
CPCC04B35/5607C04B35/622C04B2235/3232C04B2235/3239C04B2235/3241C04B2235/3244C04B2235/3251C04B2235/3256C04B2235/3258C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/96
Inventor 陈磊王恺王玉金苏文韬周玉
Owner HARBIN INST OF TECH
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