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Preparation method of high-entropy ceramic coating

A ceramic coating and high-entropy technology, applied in the coating, metal material coating process, fusion spraying, etc., can solve the problems of less research and achieve the effect of simple preparation process, high density and high cohesive strength

Active Publication Date: 2020-06-09
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a high-entropy ceramic coating for the defects that there are few studies on the preparation of the current high-entropy ceramic coating and insufficient existing technologies

Method used

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  • Preparation method of high-entropy ceramic coating
  • Preparation method of high-entropy ceramic coating
  • Preparation method of high-entropy ceramic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The first step is to prepare multi-component composite powder for thermal spraying: uniformly mix five kinds of raw material powders zirconium carbide, titanium carbide, niobium carbide, chromium carbide and vanadium carbide with a particle size range of 0.001 micron to 10 micron into a composite powder, Among them, the mass ratio of raw material powder zirconium carbide, titanium carbide, niobium carbide, chromium carbide and vanadium carbide to the total composite powder is 27:15:27:15:16, and then evenly mixed into the binder (methyl cellulose), The binder consumption is that the weight ratio is the above-mentioned composite powder: binder=100:0.1, thus being mixed with multi-element composite powder for thermal spraying;

[0037] The second step, the surface pretreatment of the base material:

[0038] The base material is heat-resistant steel 1Cr18Ni9Ti steel, and the pretreatment method is sandblasting, and then the surface of the 1Cr18Ni9Ti steel base material aft...

Embodiment 2

[0044] The first step is to prepare multi-component composite powder for thermal spraying: uniformly mix five raw material powders ZrC, HfC, TiC, NbC and TaC with a particle size range of 0.001 micron to 10 micron into a composite powder, wherein each raw material The powder accounts for 20% of the total mass ratio of the composite powder, and then evenly mixes into the binder. Sprayed multi-component composite powder;

[0045] The second step, the surface pretreatment of the base material:

[0046] The base material is titanium-aluminum intermetallic compound Ti-48Al-2Cr-2Nb, the pretreatment method is sandblasting, and then the NiCoCrAlYTa bonding layer is sprayed on the surface of the titanium-aluminum intermetallic compound base material after sandblasting;

[0047] The third step, preparation of high-entropy ceramic coating:

[0048] Adopting the method of thermal spraying, spraying the multi-element composite powder for thermal spraying prepared in the above-mentioned ...

Embodiment 3

[0052] Other steps are the same as in Example 1, except that the raw material powder in the first step is six kinds of raw material powders: zirconium carbide, hafnium carbide, tantalum carbide, titanium carbide, niobium carbide and vanadium carbide, which are evenly mixed into composite powder, wherein The mass ratio of raw material powder zirconium carbide, hafnium carbide, tantalum carbide, titanium carbide, niobium carbide and vanadium carbide to the total composite powder is 17:17:17:17:16:16. The properties of the coating thus obtained are close to those of Example 1.

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Abstract

The invention discloses a preparation method of a high-entropy ceramic coating. The method comprises the following steps: firstly, mixing a plurality of single-element compound raw material powder toobtain composite powder, and then mixing a binder into the composite powder to prepare multi-element composite powder for thermal spraying, wherein the single-element compound is carbide, nitride or diboride, and the multiple elements are any five or more of zirconium, titanium, hafnium, tantalum, niobium, vanadium, chromium, molybdenum or tungsten; secondly, pretreating the surface of a substrateof the required coating; and thirdly, spraying the multi-component composite powder on the surface of the substrate by adopting a thermal spraying method so as to form the high-entropy ceramic coating through in-situ synthesis. The high-entropy ceramic coating prepared by the invention has high compactness, hardness, wear resistance, corrosion resistance, high-temperature resistance and oxidationresistance.

Description

technical field [0001] The technical solution of the invention relates to the plating of materials by high-entropy ceramics, in particular to the preparation method of high-entropy ceramic coatings. Background technique [0002] Refractory carbides, borides, and nitrides of transition metals (zirconium, titanium, hafnium, tantalum, niobium, vanadium, chromium, molybdenum, and tungsten), with high melting point, good thermal stability, excellent thermal shock resistance, and With many excellent properties such as good oxidation and ablation resistance, it has become one of the most promising candidate materials for the preparation of new high-temperature material structural parts in the aerospace field. However, with the development of aerospace and nuclear industries, the required materials are required to be used in more severe environments, and the previous materials can no longer meet the requirements. High-entropy ceramics are a new type of multi-component (five or more...

Claims

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Application Information

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IPC IPC(8): C23C4/131C23C4/073C23C4/10C23C4/02C23C4/08C23C4/06C22C30/00
CPCC23C4/131C23C4/073C23C4/10C23C4/02C23C4/08C22C14/00C22C30/00
Inventor 杨勇孙文韦孙晓文崔宇航马玉夺王磊董艳春
Owner HEBEI UNIV OF TECH
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