Electronic beam physical vapor deposition method for large-area uniform deposition of thermal barrier coating layers

A technology of physical vapor deposition and thermal barrier coating, which is used in coatings, metal material coating processes, ion implantation plating, etc. Layer uniformity can not be guaranteed and other problems, to achieve the effect of uniform preparation, solve the preparation of uniform thermal barrier coating, and increase the effective area

Inactive Publication Date: 2020-03-06
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above two methods have disadvantages: 1) the overlapping area of ​​the coating is not easy to control, and the uniformity of the coating cannot be guaranteed; 2) the size of the crucible cannot be infinitely increased

Method used

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  • Electronic beam physical vapor deposition method for large-area uniform deposition of thermal barrier coating layers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, in this embodiment, two crucibles 1 are selected, the inner diameter d of the crucibles 1 is 60 mm, the distance L between the centers of the two crucibles 1 is 300 mm, and the vertical distance H between the crucible 1 and the workpiece 2 is 270 mm.

[0030] Sandblasting is performed on the surface of the workpiece 2, and the surface of the workpiece 2 is cleaned, and the workpiece 2 is fixed on the rotating shaft 3.

[0031] The workpiece 2 is heated to a temperature of 850°C.

[0032] The YSZ material in the evaporation crucible 1 is heated by the electron beam, and a stable vapor cloud 4 is formed above the middle of the two crucibles 1 .

[0033] The workpiece 2 is sent into the steam cloud 4 through the rotating shaft 3 for coating deposition, the rotation speed of the workpiece 2 is 10 rad / min, and the coating deposition time is 25 min.

[0034] After the coating is deposited, the electron beam is turned off, the vapor cloud 4 disappe...

Embodiment 2

[0036] Such as figure 1 As shown, in this embodiment, two crucibles 1 are selected, the inner diameter d of the crucibles 1 is 70 mm, the distance L between the centers of the two crucibles 1 is 600 mm, and the vertical distance H between the crucible 1 and the workpiece 2 is 660 mm.

[0037] Sandblasting is performed on the surface of the workpiece 2, and the surface of the workpiece 2 is cleaned, and the workpiece 2 is fixed on the rotating shaft 3.

[0038] The workpiece 2 is heated to a temperature of 1100°C.

[0039] The YSZ material in the evaporation crucible 1 is heated by the electron beam, and a stable vapor cloud 4 is formed above the middle of the two crucibles 1 .

[0040] The workpiece 2 is sent into the steam cloud 4 through the rotating shaft 3 for coating deposition, the rotation speed of the workpiece 2 is 25 rad / min, and the coating deposition time is 40 min.

[0041] After the coating is deposited, the electron beam is turned off, the vapor cloud 4 disapp...

Embodiment 3

[0043] Take the turbine blade of the engine, sandblast the surface of the blade, clean the surface of the blade and fix the blade on the rotating shaft 3 .

[0044] Such as figure 1 As shown, in this embodiment, two crucibles 1 are selected, the inner diameter d of the crucibles 1 is 50 mm, the distance L between the centers of the two crucibles 1 is 400 mm, and the vertical distance H between the crucibles 1 and the blades is 470 mm.

[0045] The blade is heated, and the heating temperature is up to 900°C.

[0046] The YSZ material in the evaporation crucible 1 is heated by the electron beam, and a stable vapor cloud 4 is formed above the middle of the two crucibles.

[0047] The blade is sent into the steam cloud 4 through the rotating shaft 3 to deposit the coating, the rotation speed of the blade is 10 rad / min, and the coating deposition time is 25 min.

[0048] After the coating is deposited, the electron beam is turned off, and the steam cloud 4 disappears, and the bla...

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Abstract

The invention discloses an electronic beam physical vapor deposition method for large-area uniform deposition of thermal barrier coating layers. The method comprises the following steps: multiple crucibles with inner diameters of 50-70 mm are mounted; center gaps of the crucibles are set as 300-600 mm; vertical distances from the crucibles to workpieces are set as 270-660 mm; the surfaces of the workpieces are treated; the surface-cleaned workpieces are fixed on rotating shafts; the workpieces are heated; coating layer materials are injected in the crucibles; the coating layer materials in thecrucibles are heated and evaporated through electronic beams to form stable steam clouds above the middles of the crucibles; the workpieces are fed in the steam clouds; the workpieces are rotated through the rotating shafts to deposit coating layers; after the deposition of the coating layers is finished, the electronic beams are closed; the workpieces are taken out after cooling of the workpieces; and uniform thermal barrier coating layers are obtained on the surfaces of the workpieces. The method solves the difficulty of preparation of the uniform thermal barrier coating layers for large-size aero-engine turbine blades by the electronic beam physical vapor deposition technology.

Description

technical field [0001] The invention relates to the technical field of thermal barrier coatings, in particular to an electron beam physical vapor deposition method for uniformly depositing thermal barrier coatings over a large area. Background technique [0002] At present, thermal barrier coatings are generally prepared by spraying or electron beam physical vapor deposition technology. The coating structure prepared by spraying technology is lamellar, and the coating structure prepared by electron beam physical vapor deposition technology is columnar crystal structure. The two structures The thermal barrier coating is widely used on engine hot end parts. Compared with spraying technology, the thermal barrier coating prepared by electron beam physical vapor deposition technology has high stress tolerance, prolongs the thermal shock resistance of the coating, and can maintain a long life of the coating under alternating thermal shocks, but is limited Due to equipment limitat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/30C23C14/08
CPCC23C14/083C23C14/30
Inventor 姜春竹崔向中高巍周国栋马江宁
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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