Coating preparation method for realizing high-efficiency operation of PS-PVD equipment

A PS-PVD, high-efficiency technology, applied in coating, metal material coating process, superimposed layer plating, etc., can solve the problems of high coating preparation cost, low plasma jet usage rate, etc., and achieve sufficient gasification. , The effect of reducing the liquid phase and unmelted particles and increasing the heating capacity

Active Publication Date: 2022-02-25
BEIHANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a coating preparation method that realizes the low-cost and high-efficiency operation of PS-PVD equipment, and solves the low utilization rate of plasma jets and high coating preparation costs in PS-PVD. The problem

Method used

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  • Coating preparation method for realizing high-efficiency operation of PS-PVD equipment
  • Coating preparation method for realizing high-efficiency operation of PS-PVD equipment

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Effect test

Embodiment 1

[0038] Using the method disclosed in the present invention, on a high-purity graphite substrate of 200 mm × 200 mm × 5 mm, the vacuum degree of the vacuum chamber, the total power of PS-PVD equipment spraying, and the spraying current are adjusted to obtain a plasma of 50-100 mm jet to prepare YSZ coating and analyze jet utilization, the specific process parameters used are as follows:

[0039] (1) Start the PS-PVD equipment, assemble the sprayed workpiece, and close the vacuum chamber;

[0040] (2) Vacuum until the pressure of the vacuum chamber is 50mbar;

[0041] (3) Adjust the spraying power to 70 kW and the spraying current to 1000A;

[0042] (4) Open the working gas valve and strike the arc. After the arc is stable, gradually adjust the gas flow to the specified gas flow Ar: 20L / min, He: 40L / min, H 2 : 10L / min, N 2 : 10L / min;

[0043] (5) Adjust the rotational speed of the workpiece to 10 rpm, use the plasma jet to preheat the blades, and detect the substrate tempera...

Embodiment 2

[0049] Using PS-PVD to spray YSZ ceramic layer on the surface of a duplex guide vane of a certain type of aero-engine, the method designed by the present invention is adopted respectively to regulate the vacuum degree of the vacuum chamber, the spraying power and the spraying current of the PS-PVD equipment To obtain a plasma jet of 50-100 mm to prepare YSZ coating and analyze the utilization rate of the jet, the parameters of the specific process steps are as follows:

[0050] (1) Start the PS-PVD equipment, assemble the spraying blades, and close the vacuum chamber;

[0051] (2) Vacuum until the pressure of the vacuum chamber is 50mbar;

[0052] (3) Adjust the spraying power to 70kW and the spraying current to 1000A;

[0053] (4) Open the working gas valve and strike the arc. After the arc is stable, gradually adjust the gas flow to the specified gas flow Ar: 20L / min, He: 40L / min, H 2 : 10L / min, N 2 : 10L / min;

[0054] (5) The speed of the blade is set to 10rpm, the blad...

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Abstract

The invention discloses a coating preparation method for realizing high-efficiency operation of PS-PVD equipment, and aims to solve the technical problems that in the existing process of preparing a thermal barrier coating through plasma physical vapor deposition, the plasma jet utilization rate is low, the preparation cost is increased, and the microstructure consistency and the thickness uniformity of a surface coating are difficult to guarantee when a workpiece is sprayed. In the process of preparing the thermal barrier coating through plasma physical vapor deposition, the vacuum degree of a vacuum chamber, the spraying power of PS-PVD equipment and the spraying current are regulated and controlled, the diameter of plasma jet is made to be 50-100 mm, and an optimized design scheme is provided for the regulation and control range of three parameters and the coordinated regulation and control range of the three parameters. The heating capacity of the plasma jet is correspondingly improved, spraying powder is gasified more sufficiently, liquid phases and unmelted particles in the jet are correspondingly reduced, the utilization rate of the plasma jet is greatly increased, energy is effectively saved, the production cost is reduced, and the consistency of the microstructure of the prepared coating is better.

Description

technical field [0001] The invention belongs to the technical field of plasma spraying and physical vapor deposition of coatings, and in particular relates to a coating preparation method for realizing high-efficiency operation of PS-PVD equipment. Background technique [0002] Plasma spraying technology and electron beam physical vapor deposition (B-PVD) technology are currently the most widely used preparation technologies for thermal barrier coatings. The traditional plasma spraying technology has the advantages of higher deposition efficiency and lower equipment cost than the EB-PVD preparation technology, but it can only form a layered structure coating, and the thermal shock resistance of the coating is obviously inferior to that of the EB-PVD columnar crystal structure coating. . In view of this, plasma physical vapor deposition technology has begun to be applied in the field of thermal barrier coating preparation. [0003] Plasma physical vapor deposition (Plasma S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/54C23C14/08C25D3/56C23C10/06C23C4/073C23C28/00
CPCC23C14/325C23C14/54C23C14/083C25D3/56C23C10/06C23C4/073C23C28/321C23C28/3215C23C28/3455
Inventor 郭洪波高丽华魏亮亮何雯婷彭徽
Owner BEIHANG UNIV
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