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Preparation method for zirconium boride-based coating

A zirconium boride-based coating technology, applied in the coating, metal material coating process, fusion spraying, etc., can solve the problems of high raw material cost, complicated preparation process, high process cost, etc., to overcome raw material cost, prepare The effect of simple method and high process cost

Inactive Publication Date: 2017-02-08
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is: to provide a preparation method of zirconium boride-based coating, adopt the method of in-situ synthesis of zirconium boride-based coating, overcome the thermal spraying method of preparing zirconium boride-based coating in the prior art The direct spraying method has high raw material cost, high process cost, low deposition efficiency, high coating porosity, poor coating uniformity, coarse coating structure, low coating toughness, poor adhesion between coating and substrate and coating resistance. The defects of poor thermal shock and other methods have complex preparation process, high energy consumption, low efficiency, small coating thickness, high coating porosity, poor coating uniformity, poor bonding force between coating and substrate, low toughness of coating, coating Layers are prone to cracking and are not suitable for large-scale industrial production applications

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  • Preparation method for zirconium boride-based coating
  • Preparation method for zirconium boride-based coating
  • Preparation method for zirconium boride-based coating

Examples

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Embodiment 1

[0037] The preparation method of the zirconium boride-based coating in this embodiment adopts the method of in-situ synthesis of the zirconium boride-based coating, and the steps are as follows:

[0038] The first step is to prepare the zirconia / boron carbide / aluminum composite powder for thermal spraying:

[0039] Evenly mix aluminum powder with a particle size range of 0.5 micron to 10 microns, zirconia 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 plus zirconia powder accounts for 95% by weight of the total mass of the three raw material powders, and the weight percentage between the zirconia powder and the aluminum powder The weight ratio is 75:25, and then uniformly mixed into the binder polyvinyl alcohol, the amount of th...

Embodiment 2

[0045] The preparation method of the zirconium boride-based coating adopts the method of in-situ synthesis of the zirconium boride-based coating, and the steps are as follows:

[0046] The first step is to prepare the zirconia / boron carbide / aluminum composite powder for thermal spraying:

[0047] Evenly mix aluminum powder with a particle size range of 0.5 micron to 10 microns, zirconia 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 17% by weight of the total mass of the three raw material powders, aluminum powder plus zirconia powder accounts for 83% by weight of the total mass of the three raw material powders, and the weight percentage between the zirconia powder and the aluminum powder The weight ratio is then 60:40, and then uniformly mixed into the binder polyvinyl alcohol, the polyvinyl alcohol consump...

Embodiment 3

[0056] The preparation method of the zirconium boride-based coating adopts the method of in-situ synthesis of the zirconium boride-based coating, and the steps are as follows:

[0057] The first step is to prepare the zirconia / boron carbide / aluminum composite powder for thermal spraying:

[0058] Evenly mix aluminum powder with a particle size range of 0.5 micron to 10 microns, zirconia 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 20% by weight of the total mass of the three raw material powders, aluminum powder plus zirconia powder accounts for 80% by weight of the total mass of the three raw material powders, and the weight percentage between the zirconia powder and the aluminum powder The weight ratio is 90:10, and then uniformly mixed into the binder methyl cellulose, the amount of the methyl cellulose ...

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Abstract

The invention relates to a preparation method for a zirconium boride-based coating and relates to plating of a material by a boride. The method of in-situ synthesizing the zirconium boride-based coating comprises the steps of: preparing zirconium oxide / boron carbide / aluminum compound powder for thermal spraying; pre-treating a base material; and spraying the prepared zirconium oxide / boron carbide / aluminum compound powder for thermal spraying to the surface of the pre-treated base material by adopting a thermal spraying method so as to form the zirconium boride-based coating. The method provided by the invention overcomes the defects that in the prior art, the prepared zirconium boride-based coating is high in porosity, poor in uniformity, rough in tissue, low in toughness, small in thickness, poor in bonding force with a matrix, easy to crack and poor in thermal shock resistance; and the defects in the prior art that the preparation process is complicated, the process cost is high, the depositing efficiency is low, the cost of raw materials is high, the energy consumption is great, the efficiency is low, and the preparation method is not suitable for being applied to industrial production on a large scale.

Description

technical field [0001] The technical solution of the invention relates to the coating of materials with borides, in particular to the preparation method of zirconium boride-based coatings. Background technique [0002] With the development of modern technologies such as aerospace, aviation, atomic energy and new smelting technologies, more and more stringent requirements are put forward for high-temperature high-performance structural materials, requiring materials to have good high-temperature resistance to adapt to harsh operating environments, such as heat-resistant Impact, high temperature strength, corrosion and oxidation resistance. Zirconium boride (ZrB 2 ) has high melting point (3245°C), high hardness (22GPa), good electrical and thermal conductivity, good flame retardancy, heat resistance, good chemical stability, oxidation resistance, corrosion resistance and good neutron control ability Therefore, it has very broad application prospects in the fields of ultra-h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/10C23C4/02C23C4/134C23C4/126C23C4/129
CPCC23C4/02C23C4/10
Inventor 杨勇阎殿然张建新董艳春褚振华陈学广王磊
Owner HEBEI UNIV OF TECH
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