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A kind of preparation method of nanoparticle-reinforced thermal barrier coating

A nanoparticle and thermal barrier coating technology, which is applied in coatings, metal material coating processes, sustainable transportation, etc., can solve the problem that nano-level reinforced particles are not easy to be added to the molten pool and cannot be thermal barrier coating.

Active Publication Date: 2017-08-01
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above defects or improvement needs of the prior art, the present invention provides a method for preparing a nanoparticle-reinforced thermal barrier coating. Re-discrete, and then cool the substrate melt pool to prepare a nanoparticle-enhanced thermal barrier coating on the substrate surface, thereby solving the problem in the prior art that nanoscale reinforcement particles are not easy to join the melt pool and cannot be easily prepared on the substrate surface. Technical Issues of Particle Reinforced Thermal Barrier Coatings

Method used

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  • A kind of preparation method of nanoparticle-reinforced thermal barrier coating
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Experimental program
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Effect test

Embodiment 1

[0032] S1: The particle size is 5nm ZrO by spray drying method 2 The nanoparticles are agglomerated into an agglomerated powder of about 60 μm;

[0033] S2: Under the protection of an argon atmosphere with a purity of 99.9%, heat-treat the agglomerated powder obtained in step S1 to obtain a sintered powder, the particle size of the sintered powder is 50-60 μm, the heat-treatment temperature is 400°C, and the heat-treatment time is 2h. The heat treatment furnace used for heat treatment is the furnace of model WH-C-4 produced by Wuhan Electric Furnace Factory.

[0034] S3: First wash the surface of the substrate with acetone for 5 minutes to 8 minutes to remove oil stains, then use pickling, and then put it in an oven and bake at 80°C for 30 minutes to obtain a substrate with a clean and dry surface. The sintered powder obtained in step S2 is placed on the surface of the substrate, and then the substrate is melted by laser cladding to form a molten pool. Thermal barrier coati...

Embodiment 2

[0037] S1: The particle size is 35nm ZrO by spray drying method 2 The nanoparticles are agglomerated into 75μm agglomerated powder;

[0038] S2: Under the protection of an argon atmosphere with a purity of 99.9%, heat-treat the agglomerated powder obtained in step S1 to obtain a sintered powder, the particle size of the sintered powder is 65-70 μm, the heat-treatment temperature is 500°C, and the heat-treatment time is 1.5h. The heat treatment furnace used for heat treatment is the furnace of model WH-C-4 produced by Wuhan Electric Furnace Factory.

[0039]S3: First wash the surface of the substrate with acetone for 5 minutes to 8 minutes to remove oil stains, then use pickling, and then put it in an oven and bake at 80°C for 30 minutes to obtain a substrate with a clean and dry surface. The sintered powder obtained in step S2 is fed into the molten pool obtained after the substrate is deposited by the plasma arc, the temperature of the molten pool is 1800°C, and then cooled...

Embodiment 3

[0042] S1: The particle size is 70nm ZrO by spray drying method 2 The nanoparticles are agglomerated into 92μm agglomerated powder;

[0043] S2: Under the protection of an argon atmosphere with a purity of 99.9%, heat-treat the agglomerated powder obtained in step S1 to obtain a sintered powder, the particle size of the sintered powder is 80-85 μm, the heat-treatment temperature is 700°C, and the heat-treatment time is 2.5h. The heat treatment furnace used for heat treatment is the furnace of model WH-C-4 produced by Wuhan Electric Furnace Factory.

[0044] S3: First wash the surface of the substrate with acetone for 5 minutes to 8 minutes to remove oil stains, then wash it with water, and then put it in an oven for 30 minutes at 80°C to obtain a substrate with a clean and dry surface. The sintered powder obtained in step S2 is fed into the molten pool obtained after the substrate is arc clad, the temperature of the molten pool is 2250°C, and then cooled and solidified to pr...

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Abstract

The invention discloses a method for preparing a nanoparticle reinforced thermal barrier coating, aims to prepare thermal barrier coatings on the surface of a substrate, and belongs to the field of thermal barrier coating preparation. The method comprises the following steps: 1, agglomerating nanoparticles to be agglomeration powder of 60-120 [mu]m; 2, performing thermal treatment on the agglomeration powder so as to obtain sintered powder, wherein the particle size of the sintered powder is 50-100 [mu]m; 3, putting the sintered powder on the surface of the substrate, melting the substrate with the sintering powder on the surface by using a heat source so as to form a molten bath, cooling to cure the molten bath, or feeding the sintered powder into the molten bath formed after the substrate is molten by the heat source, cooling to cure the sintered powder together with the molten bath, and forming nanoparticles in a dispersion manner in the process, thereby obtaining the nanoparticle reinforced thermal barrier coating on the surface of the substrate. The method is simple in process, easy to operate, and capable of easily, conveniently and rapidly preparing the nanoparticle reinforced thermal barrier coating on the surface of the substrate.

Description

technical field [0001] The invention belongs to the field of preparation of thermal barrier coatings, and more specifically relates to a preparation method of nanoparticle-reinforced thermal barrier coatings. Background technique [0002] During the flight of high-speed aircraft, the surface temperature rises sharply due to aerodynamic heating, resulting in a strong thermal shock. Both structural strength and stability will decrease, so the issue of thermal protection has always been a hot spot of concern. [0003] At present, the thermal protection of the aircraft is mainly realized through the double-layer structure. A metal bonding layer is prepared on the substrate, and a ceramic insulation layer is coated on the surface. The main function of the ceramic insulation layer is heat insulation, anti-scouring and corrosion; the main function of the metal bonding layer is to resist high temperature oxidation and improve the substrate. Physical compatibility with ceramic coat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
CPCC23C24/103Y02T50/60
Inventor 刘德健张舒唐峰梅刚
Owner HUAZHONG UNIV OF SCI & TECH
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