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NiCrAlY/NiCrAlY-YSZ/YSZ thermal barrier coating on surface of nickel-based alloy and preparation method thereof

A nickel-based alloy, thermal barrier coating technology, applied in the direction of metal material coating process, coating, superimposed layer plating, etc., can solve the problems of immature preparation technology, complex preparation process, and failure to be widely used. , to achieve the effect of avoiding cracking and peeling failure, simple process and alleviating thermal mismatch

Inactive Publication Date: 2019-08-16
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the research on gradient thermal barrier coatings with continuously changing composition from metal to ceramic has also attracted much attention, but due to the immature preparation technology, it has not been widely used.
[0004] To sum up, the current methods for improving the thermal matching between metal and ceramics in thermal barrier coatings all have defects such as complex preparation processes.

Method used

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  • NiCrAlY/NiCrAlY-YSZ/YSZ thermal barrier coating on surface of nickel-based alloy and preparation method thereof
  • NiCrAlY/NiCrAlY-YSZ/YSZ thermal barrier coating on surface of nickel-based alloy and preparation method thereof

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Embodiment 1

[0028] The preparation method of the NiCrAlY / NiCrAlY-YSZ / YSZ thermal barrier coating on the surface of the DZ125 nickel-based alloy of the present embodiment comprises the following steps:

[0029] Step 1. Use 80#, 200#, 400#, 600#, 800#, 1000# water sandpaper to polish the DZ125 nickel-based alloy step by step, and then put it into acetone for ultrasonic cleaning for 15 minutes;

[0030] Step 2, using electron beam physical vapor deposition to deposit a NiCrAlY metal coating with a thickness of 20 μm on the surface of the DZ125 nickel-based alloy after ultrasonic cleaning in step 1; the process parameters of the electron beam physical vapor deposition are: deposition The chamber vacuum is less than 3×10 -3 Pa, the temperature of the DZ125 nickel-based alloy after ultrasonic cleaning is 800°C, the evaporation current of the NiCrAlY target is 1.0A, the rotation speed is 5r / min, and the distance between the target and the base is 300mm;

[0031] Step 3, using electron beam phys...

Embodiment 2

[0037] The preparation method of the NiCrAlY / NiCrAlY-YSZ / YSZ thermal barrier coating on the surface of the DZ125 nickel-based alloy of the present embodiment comprises the following steps:

[0038] Step 1. Use 80#, 200#, 400#, 600#, 800#, 1000# water abrasive paper to polish the DZ125 nickel-based alloy step by step, and then put it into acetone for ultrasonic cleaning for 10 minutes;

[0039] Step 2, using electron beam physical vapor deposition to deposit a NiCrAlY metal coating with a thickness of 10 μm on the surface of the DZ125 nickel-based alloy after ultrasonic cleaning in step 1; the process parameters of the electron beam physical vapor deposition are: deposition The chamber vacuum is less than 3×10 -3 Pa, the temperature of the DZ125 nickel-based alloy after ultrasonic cleaning is 900°C, the evaporation current of the NiCrAlY target is 0.8A, the rotation speed is 15r / min, and the distance between the target and the base is 500mm;

[0040] Step 3. Depositing a NiCrA...

Embodiment 3

[0044] The preparation method of the NiCrAlY / NiCrAlY-YSZ / YSZ thermal barrier coating on the surface of the DZ125 nickel-based alloy of the present embodiment comprises the following steps:

[0045] Step 1. Use 80#, 200#, 400#, 600#, 800#, 1000# water abrasive paper to polish the DZ125 nickel-based alloy step by step, and then put it into acetone for ultrasonic cleaning for 30 minutes;

[0046] Step 2, using electron beam physical vapor deposition to deposit a NiCrAlY metal coating with a thickness of 30 μm on the surface of the DZ125 nickel-based alloy after ultrasonic cleaning in step 1; the process parameters of the electron beam physical vapor deposition are: deposition The chamber vacuum is less than 3×10 -3 Pa, the temperature of the DZ125 nickel-based alloy after ultrasonic cleaning is 700°C, the evaporation current of the NiCrAlY target is 1.2A, the rotation speed is 10r / min, and the distance between the target and the base is 200mm;

[0047] Step 3. Depositing a NiCrA...

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Abstract

The invention discloses a NiCrAlY / NiCrAlY-YSZ / YSZ thermal barrier coating on the surface of a nickel-based alloy. The NiCrAlY / NiCrAlY-YSZ / YSZ thermal barrier coating on the surface of the nickel-basedalloy comprises a NiCrAlY metal coating, a YSZ ceramic coating and a NiCrAlY-YSZ metal ceramic composite coating which are deposited on the surface of a nickel-based alloy in sequence, wherein the NiCrAlY-YSZ metal ceramic composite coating is located between the NiCrAlY metal coating and the YSZ ceramic coating. The invention further discloses a preparation method of the thermal barrier coating.The method comprises the steps of depositing the NiCrAlY coating, the NiCrAlY-YSZ coating and the YSZ coating on the surface of the nickel-based alloy through an electron beam physical vapor deposition method. According to the NiCrAlY / NiCrAlY-YSZ / YSZ thermal barrier coating on the surface of the nickel-based alloy, the thermal expansion coefficient of the NiCrAlY-YSZ metal ceramic composite coating is within the range from the thermal expansion coefficient of the NiCrAlY metal coating to the thermal expansion coefficient of the YSZ ceramic coating. The thermal mismatching performance betweenthe NiCrAlY metal coating and the YSZ ceramic coating is relieved. The thermal shock resistance of the thermal barrier coating is improved. The NiCrAlY / NiCrAlY-YSZ / YSZ thermal barrier coating providedby the invention is simple in process, good in repeatability and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of surface materials, and in particular relates to a NiCrAlY / NiCrAlY-YSZ / YSZ thermal barrier coating on the surface of a nickel-based alloy and a preparation method thereof. Background technique [0002] Thermal barrier coating is a thermal protection technology that coats ceramic materials with high temperature resistance and low thermal conductivity on the surface of the alloy to improve the alloy's high temperature oxidation corrosion resistance and reduce the surface operating temperature. One of the three key technologies. However, due to the poor thermal matching between metal and ceramics, thermal barrier coatings are prone to failure in the form of coating cracking and peeling when they are subjected to frequent cooling and heating cycles. [0003] In order to improve the thermal matching between metal and ceramics in thermal barrier coatings, Wang et al. from Harbin Engineering University studied t...

Claims

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Application Information

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IPC IPC(8): C23C14/08C23C14/16C23C14/30
CPCC23C14/083C23C14/16C23C14/30C23C28/30C23C28/3215C23C28/324C23C28/3455
Inventor 刘林涛李争显王彦峰何飞吕海兵
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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