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Treatment method of improving oxidation resistance of thermal barrier coating

A technology of thermal barrier coating and treatment method, which is applied in coating, metal material coating process, ion implantation plating, etc. Coating oxidation resistance and other issues, to achieve the effect of improving high temperature service performance, improving microstructure and surface density, and reducing thermal conductivity

Inactive Publication Date: 2012-05-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The second is that the direction of the columnar grain structure and its gaps are parallel to the direction of heat conduction, which causes a significant increase in the thermal conductivity of the thermal barrier coating, which reduces the function of the thermal barrier coating to a certain extent, which is not conducive to the improvement of the oxidation resistance of the thermal barrier coating. improve

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  • Treatment method of improving oxidation resistance of thermal barrier coating
  • Treatment method of improving oxidation resistance of thermal barrier coating
  • Treatment method of improving oxidation resistance of thermal barrier coating

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Embodiment 1

[0020] Combined with the specific experimental process, the implementation plan for improving the high-temperature oxidation resistance of thermal barrier coatings by high-current pulsed electron beam irradiation is described in detail. Taking the same pulse width and different energy densities as an example, the specific steps are as follows:

[0021] The first step is to fix the sample with deposited thermal barrier coating on the sample stage and vacuumize

[0022] Fix the prepared thermal barrier coating sample on the sample stage of the high-current pulsed electron beam device, close the vacuum chamber and evacuate to make the vacuum degree reach 3.5×10 -2 Pa.

[0023] In the second step, the high-current pulsed electron beam irradiation treatment realizes the capping of the columnar crystals of the ceramic layer

[0024] According to the technical requirements of the equipment, the voltage is 15kV and the frequency is 1Hz. At room temperature, the pulse width of the hi...

Embodiment 2

[0032] Combined with the specific experimental process, the implementation plan for improving the high-temperature oxidation resistance of thermal barrier coatings by high-current pulsed electron beam irradiation is described in detail. Taking the same energy density and different pulse widths as an example, the specific steps are as follows:

[0033] The first step is to fix the sample with deposited thermal barrier coating on the sample stage and vacuumize

[0034] Fix the prepared thermal barrier coating sample on the sample stage of the high-current pulsed electron beam device, close the vacuum chamber and evacuate to make the vacuum degree reach 3.5×10 -2 Pa.

[0035] In the second step, the high-current pulsed electron beam irradiation treatment realizes the capping of the columnar crystals of the ceramic layer

[0036] According to the technical requirements of the equipment, the voltage is 15kV and the frequency is 1Hz. At room temperature, the energy density of the ...

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Abstract

The invention relates to a treatment method of improving oxidation resistance of a thermal barrier coating, belonging to the technical field of thermal barrier coating surface treatment and modification. High current pulse electron beam irradiation is utilized to realize electron beam physical vapor deposition to prepare a yttrium oxide stabilizing zirconium oxide thermal barrier coating to cap ceramic layer columnar crystals, thus the heat-shielding performance and the high temperature oxidation resistance of the coating are improved. The process conditions are shown as follows: the vacuum is 3.5*10<-2>Pa, the voltage is 15kV, the frequency is 1Hz, the pulse width is 120-150ms, the energy density is 10J / cm<2>-20J / cm<2>, the pulse time is 30-40 and the remelting layer thickness reaches atleast 10 micrometers. The invention has the advantages that the electron beam physical vapor deposition layer columnar crystals are capped after the high current pulse electron beam irradiation is ended, and thus, the surface of the thermal barrier coating becomes smooth, no penetrable microcracks are generated, the oxygen element diffusion is effectively stopped, the growth of a thermal growth oxidation layer is relieved and the heat-shielding performance and the high temperature oxidation resistance of the thermal barrier coating are obviously improved.

Description

technical field [0001] The invention relates to a treatment method for improving the oxidation resistance of thermal barrier coatings, that is, high-current pulsed electron beam irradiation realizes electron beam physical vapor deposition to prepare columnar crystal caps of thermal barrier coating ceramic layers, thereby improving thermal barrier coatings. The heat insulation and oxidation resistance properties belong to the technical field of thermal barrier coating surface treatment and modification. Background technique [0002] With the development of aerospace technology, the service temperature of hot end parts such as engine turbine blades is getting higher and higher, which puts forward higher requirements for the high temperature resistance of the superalloy used to prepare the blades. One of the methods to solve the problem is to add Thermal barrier coatings (TBCs) with high temperature oxidation resistance and thermal insulation properties were prepared on the sur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/10C23C4/18C23C4/073C23C4/134C23C14/08C23C14/30
Inventor 梅显秀王存霞武洪臣马腾才秦颖
Owner DALIAN UNIV OF TECH
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