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Preparation method of tantalum boride composite coating

A composite coating, tantalum boride technology, applied in the coating, metal material coating process, fusion spraying, etc., can solve the problems of complex preparation process, low toughness, high cost, etc., and achieve simple preparation process and high density , cheap effect

Inactive Publication Date: 2017-10-24
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a preparation method for tantalum boride composite coatings, which uses thermal spraying in-situ reaction to synthesize tantalum boride composite coatings, and overcomes the complex preparation process of preparing tantalum boride composite coatings in the prior art , high cost, high pollution, low deposition efficiency, low coating thickness, low coating density, poor uniformity, low toughness, poor bonding between coating and substrate, easy cracking and defects that are not suitable for large-scale industrial production

Method used

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  • Preparation method of tantalum boride composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The first step is to formulate tantalum oxide / boron carbide / aluminum composite powder for thermal spraying:

[0041] Mix aluminum powder with a particle size range of 0.1 micron to 10 microns, tantalum oxide powder with a particle size range of 0.001 micron to 10 microns, and boron carbide powder with a particle size range of 0.001 micron to 10 microns to form a composite powder. Wherein, boron carbide powder accounts for 5% by weight of the total mass of the three raw material powders, aluminum powder and tantalum oxide powder account for 95% by weight of the total mass of the three raw material powders, and the weight percentage between the tantalum oxide powder and the aluminum powder The weight ratio is then 60: 40, and then evenly mixes into the binder polyvinyl alcohol, the binder polyvinyl alcohol consumption is, and the weight ratio is the above-mentioned composite powder: polyvinyl alcohol=100: 0.1, thus being formulated for use in Thermally sprayed tantalum ox...

Embodiment 2

[0047] The first step is to formulate tantalum oxide / boron carbide / aluminum composite powder for thermal spraying:

[0048] Mix aluminum powder with a particle size range of 0.1 micron to 10 microns, tantalum oxide powder with a particle size range of 0.001 micron to 10 microns, and boron carbide powder with a particle size range of 0.001 micron to 10 microns to form a composite powder. Wherein, boron carbide powder accounts for 10% by weight of the total mass of these three raw material powders, aluminum powder and tantalum oxide powder account for 90% by weight of the total mass of these three raw material powders, and the weight percentage between tantalum oxide powder and aluminum powder The weight ratio is then 85: 15, and then uniformly mixes into the binder polyvinyl alcohol, and the binder polyvinyl alcohol consumption is, and the weight ratio is the above-mentioned composite powder: polyvinyl alcohol=100: 1, thus being formulated for use in Thermally sprayed tantalum ...

Embodiment 3

[0055] The first step is to formulate tantalum oxide / boron carbide / aluminum composite powder for thermal spraying:

[0056] Mix aluminum powder with a particle size range of 0.1 micron to 10 microns, tantalum oxide powder with a particle size range of 0.001 micron to 10 microns, and boron carbide powder with a particle size range of 0.001 micron to 10 microns to form a composite powder. Wherein, boron carbide powder accounts for 30% by weight of the total mass of these three raw material powders, aluminum powder and tantalum oxide powder account for 70% by weight of the total mass of these three raw material powders, and the weight percentage between tantalum oxide powder and aluminum powder The weight ratio is then 90: 10, then uniformly mixed into the binder methyl cellulose, the amount of the binder methyl cellulose is, the weight ratio is the above-mentioned composite powder: methyl cellulose=100: 2, thus preparing into tantalum oxide / boron carbide / aluminum composite powde...

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Abstract

The invention discloses a preparation method of a tantalum boride composite coating, and relates to coating of boride to metal materials. The tantalum boride composite coating is obtained through the thermal spraying in-situ reaction in a synthesis manner. The preparation method comprises the steps of preparing tantalum oxide / boron carbide / aluminum composite powder for thermal spraying, carrying out pretreatment on the surface of a matrix material needing the coating and preparing the tantalum boride composite coating. According to the preparation method, the defects that a tantalum boride composite coating prepared in the prior art is complex in preparation process, high in cost, large in pollution, low in deposition efficiency, small in coating thickness, small in coating density, poor in uniformity, low in toughness, poor in coating and matrix binding force, prone to cracking and not suitable for being applied to large-scale industrial production are overcome.

Description

technical field [0001] The technical proposal of the present invention relates to the coating of borides on metal materials, in particular to the preparation method of tantalum boride composite coating. Background technique [0002] In recent years, with the development of aerospace technology, higher requirements have been put forward for aerospace and aerospace materials, requiring materials to be used normally under the harsh conditions of high speed and ultra high temperature, and to have a low thermal expansion coefficient and high strength. , high temperature resistance and wear and corrosion resistance performance. Tantalum boride (TaB 2 ) is a boride of the transition metal tantalum, which belongs to the hexagonal AlB 2 Crystal structure, as an excellent ultra-high temperature ceramic (UHTC) material, its maximum melting point is 3200°C, it has high hardness, high strength at high temperature, good heat resistance and oxidation resistance, and good electrical condu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/134C23C4/129C23C4/126
CPCC23C4/06C23C4/126C23C4/129C23C4/134
Inventor 杨勇崔宇航褚振华杨振珑陈学广王磊董艳春张建新阎殿然
Owner HEBEI UNIV OF TECH
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