A kind of preparation method of layered structure thermal barrier coating

A thermal barrier coating, layered structure technology, applied in the direction of coating, metal material coating process, ion implantation plating, etc., can solve the problems of low coating life, difficult thermal conductivity, reduction, etc. Longevity and the effect of improving the thermal insulation effect

Active Publication Date: 2018-09-07
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The problem with this technology is the low lifetime of the coating
The problem with this technology is that it is difficult to further reduce the thermal conductivity

Method used

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  • A kind of preparation method of layered structure thermal barrier coating
  • A kind of preparation method of layered structure thermal barrier coating

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Embodiment

[0040] This embodiment provides a method for preparing a layered structure thermal barrier coating, which includes the following steps:

[0041] (1) Put the zirconia evaporation material rod 3 partially stabilized by yttrium oxide into the crucible 2 of the vacuum chamber 1, put the ion source target material titanium into the ion source 9, and evacuate the vacuum chamber 1 to 1×10 -2 Below Pa;

[0042] (2) Move the workpiece 8 directly above the evaporation material rod 3, set the rotation speed of the horizontal axis 6 to 12 rpm, and move the baffle plate 7 between the evaporation material rod 3 and the workpiece 8;

[0043] (3) Use the electron gun 4 to pre-evaporate the evaporation material rod 3, and adjust the electron beam current to 1.8A. When the surface of the evaporation material rod 3 is completely melted and boils, reduce the beam current to 0.3A;

[0044] (4) Preheat the workpiece 8 with the electron gun 5, and adjust the electron beam current to 0.1A;

[0045]...

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Abstract

The invention relates to a production method of a layered structured thermal barrier coating. The method comprises the following steps: carrying out bombardment cleaning on a workpiece by ametal ion beam before electron beam physical vapor deposition of the coating, bombarding the workpiece by the metal ion beam in the electron beam physical vapor deposition process, and periodically adjusting the size of electron beam current and electron beam current in the coating deposition process to make the coating periodically grow in order to complete production of the layered structured thermal barrier coating. The production method further improves the thermal insulation effect of the thermal barrier coating and keeps the long life of the coating.

Description

technical field [0001] The invention relates to a preparation method of a layered structure thermal barrier coating, in particular to the technical field of preparation of a high temperature alloy thermal barrier coating. Background technique [0002] At present, the methods of preparing layered thermal barrier coatings by EB-PVD technology mainly include: EB-PVD discontinuous deposition method and ion beam assisted EB-PVD method. [0003] Electron beam physical vapor deposition (EB-PVD) is a commonly used technology for preparing thermal barrier coatings. The technical feature is to preheat the substrate to a certain temperature, and then use electron beams to heat the rod to melt the rod material. Boiling forms steam, which condenses on the substrate to form a coating. The advantage of EB-PVD technology is that the deposition speed is fast, which can reach 3-4 μm per minute, and can deposit a coating with a thickness of more than 100 μm. The surface of the coating is smoo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/30
CPCC23C14/30
Inventor 高巍崔向中姜春竹周国栋马江宁
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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