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Novel thermal barrier coating structure and preparation method thereof

A thermal barrier coating, a new type of technology, applied in coatings, metal material coating processes, manufacturing tools, etc., can solve problems such as complex processes, unsuitable high-temperature blades, low precision, etc., and achieve the effect of improving oxidation resistance

Pending Publication Date: 2021-11-30
苏州金航纳米技术研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional micro-texture preparation methods such as acid engraving have low precision and complicated processes, and are not suitable for the preparation of surface microstructures of high-temperature blades.

Method used

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  • Novel thermal barrier coating structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The DD6 alloy substrate is cut into a standard sample with a diameter of 25.4cm by wire cutting process, and then the surface is ground, polished, cleaned with acetone, cleaned with alcohol and dried; then the surface is strengthened by YAG nanosecond pulse laser, The absorbing layer is aluminum foil, and the constraining layer is water. The process parameters are as follows: the pulse width is 10 ns, the energy is 5 J, the spot diameter is 3 mm, the overlap rate is 40%, and the impact is 5 times. The thickness of the impact-strengthened layer obtained is 40 μm. .

[0021] The samples after laser shock strengthening were ultrasonically cleaned in acetone and alcohol for 30 minutes respectively to remove surface grease pollutants, and then dried in a drying oven at 80°C for 30 minutes. A picosecond laser is used to construct micro-textures on its surface. The process parameters of the picosecond laser are: pulse width 13ps, repetition frequency 500kHz, scanning speed 40...

Embodiment 2

[0026] The DD6 alloy substrate is cut into a standard sample with a diameter of 25.4cm by wire cutting process, and then the surface is ground, polished, cleaned with acetone, cleaned with alcohol and dried; then the surface is strengthened by YAG nanosecond pulse laser, The absorbing layer is aluminum foil, and the constraining layer is water. The process parameters are as follows: the pulse width is 10 ns, the energy is 5 J, the spot diameter is 3 mm, the overlap rate is 40%, and the impact is 5 times. The thickness of the impact-strengthened layer obtained is 40 μm. .

[0027] The laser-shocked sample was ultrasonically cleaned with acetone and alcohol for 30 minutes to remove surface grease pollutants, and then dried in a drying oven at 80°C for 30 minutes. A picosecond laser is used to construct micro-textures on its surface. The process parameters of the picosecond laser are: pulse width 13ps, repetition frequency 500kHz, scanning speed 400mm / s, number of repetitions 10...

Embodiment 3

[0032] The DD6 alloy substrate is cut into a standard sample with a diameter of 25.4cm by wire cutting process, and then the surface is ground, polished, cleaned with acetone, cleaned with alcohol and dried; then the surface is strengthened by YAG nanosecond pulse laser, The absorbing layer is aluminum foil, and the constraining layer is water. The process parameters are as follows: the pulse width is 10 ns, the energy is 5 J, the spot diameter is 3 mm, the overlap rate is 40%, and the impact is 5 times. The thickness of the impact-strengthened layer obtained is 40 μm. .

[0033] The laser-shocked sample was ultrasonically cleaned with acetone and alcohol for 30 minutes to remove surface grease pollutants, and then dried in a drying oven at 80°C for 30 minutes. A picosecond laser is used to construct micro-textures on its surface. The process parameters of the picosecond laser are: pulse width 13ps, repetition frequency 500kHz, scanning speed 400mm / s, number of repetitions 10...

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Abstract

The invention relates to the technical field of thermal barrier coatings, in particular to a novel thermal barrier coating structure and a preparation method thereof. According to the method, laser shock is conducted on a DD6 base body, then a microstructure is constructed on the surface of the DD6 base body through picosecond laser, finally, a Gd2Zr2O7 ceramic layer is sprayed on the surface through a PS-PVD technology, the technical problem that a metal bonding layer of a traditional thermal barrier coating is prone to failure can be effectively solved, and the technology is simplified.

Description

technical field [0001] The invention relates to the technical field of thermal barrier coatings, in particular to a novel thermal barrier coating structure and a preparation method thereof. Background technique [0002] In recent years, with the continuous development of thrust-to-weight ratio and efficiency of aeroengines, the inlet temperature has increased significantly, far exceeding the working limit temperature of nickel-based superalloys. At present, thermal barrier coating technology is often used to protect metal blades. A typical thermal barrier coating consists of three layers, namely a metal substrate, an adhesive layer and a ceramic layer. Among them, the bonding layer has two main functions. On the one hand, it can protect the metal substrate from oxidation and corrosion in a high-temperature environment, and on the other hand, it can alleviate the thermal mismatch between the metal substrate and the ceramic layer, and improve its interfacial bonding force. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/02C23C4/11C23C4/134C22F3/00B23K26/12B23K26/352
CPCC23C4/02C23C4/11C23C4/134C22F3/00B23K26/355B23K26/123
Inventor 钱伟花银群蔡杰戴峰泽陈瑞芳
Owner 苏州金航纳米技术研究有限公司
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