Preparation method of laser-modified self-healing thermal barrier coating based on ultrasonic vibration assistance

A technology of thermal barrier coating and ultrasonic vibration, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., to achieve the effect of improving adaptability and service life, improving thermal shock resistance and thermal corrosion performance

Pending Publication Date: 2021-12-07
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Currently, there is little published literature describing laser-modified thermal barrier coatings

Method used

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  • Preparation method of laser-modified self-healing thermal barrier coating based on ultrasonic vibration assistance
  • Preparation method of laser-modified self-healing thermal barrier coating based on ultrasonic vibration assistance
  • Preparation method of laser-modified self-healing thermal barrier coating based on ultrasonic vibration assistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Prepare a thermal barrier coating on a nickel-based superalloy substrate, including a ceramic layer and an adhesive layer; prepare an adhesive layer by supersonic flame spraying, the powder is NiCrAlY, and the thickness of the adhesive layer is about 100 μm.

[0028] 2) On the prepared bonding layer, a ceramic layer is prepared by atmospheric plasma spraying (APS), the powder is 7% yttria partially stabilized zirconia (7YSZ), and the thickness of the ceramic layer is about 300 μm.

[0029] 3) Ultrasonic cleaning is performed on the prepared thermal barrier coating to remove surface stains and impurities.

[0030] 4) 5% TiAl 3 +CYSZ self-healing powder is evenly spread on the thermal barrier coating sample with a powder thickness of about 0.3mm. Laser modification technology (laser alloying) is used to modify the ceramic layer of the thermal barrier coating. The selected The equipment is a 1kW flexible laser manufacturing system and ultrasonic vibration auxiliary equ...

Embodiment 2

[0038] 1) Prepare a thermal barrier coating on a nickel-based superalloy substrate, including a ceramic layer and an adhesive layer; use atmospheric plasma spraying (APS) to prepare an adhesive layer, the powder is NiCrAlY, and the thickness of the adhesive layer is about 100 μm.

[0039] 2) On the prepared adhesive layer, a ceramic layer is prepared by atmospheric plasma spraying (APS), the powder is 7% yttria partially stabilized zirconia (7YSZ), and the thickness of the ceramic layer is about 300 μm.

[0040] 3) Ultrasonic cleaning is performed on the prepared thermal barrier coating to remove surface stains and impurities.

[0041] 4) 10% TiAl 3 +CYSZ self-healing powder is evenly spread on the surface of the thermal barrier coating sample, and the thickness of the powder is about 0.4mm. The laser modification technology (laser alloying) is used to modify the ceramic layer of the thermal barrier coating. The equipment is a 1kW flexible laser manufacturing system. The lase...

Embodiment 3

[0044] 1) Prepare a thermal barrier coating on a nickel-based superalloy substrate, including a ceramic layer and an adhesive layer; prepare an adhesive layer by atmospheric plasma spraying, the powder is NiCrAlY, and the thickness of the adhesive layer is about 100 μm.

[0045] 2) On the prepared adhesive layer, a ceramic layer is prepared by atmospheric plasma spraying (APS), the powder is 7% yttria partially stabilized zirconia (7YSZ), and the thickness of the ceramic layer is about 300 μm.

[0046] 3) Ultrasonic cleaning is performed on the prepared thermal barrier coating to remove surface stains and impurities.

[0047] 4) 15% TiAl 3 +CYSZ self-healing powder is evenly spread on the surface of the thermal barrier coating sample, and the thickness of the powder is about 0.5mm. The laser modification technology (laser alloying) is used to modify the ceramic layer on the surface of the thermal barrier coating. The equipment used is a 1kW flexible laser manufacturing system...

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Abstract

The invention provides a preparation method of a laser-modified self-healing thermal barrier coating based on ultrasonic vibration assistance. The preparation method comprises the following steps of: uniformly spreading mixed powder containing self-healing particles on a thermal barrier coating sample, putting the sample on an ultrasonic vibration table, and performing laser-modified surface treatment by using a 1kW laser manufacturing system to obtain a self-healing thermal barrier coating. According to the preparation method, the self-healing particles are doped in the thermal barrier coating by using an ultrasonic vibration-assisted laser alloying technology, and the self-healing particles are uniformly distributed in a modified layer; in the thermal service process of the thermal barrier coating, the self-healing particles are oxidized at high temperature to generate oxides to generate volume expansion so as to fill cracks, so that the self-healing effect of the cracks is achieved, and the thermal shock resistance and the thermal corrosion resistance of the thermal barrier coating are improved; and by adopting the laser-modified thermal barrier coating obtained by the preparation method, the adaptability and the service life of key hot end parts of high-end equipment in a high-temperature severe service environment can be obviously improved and prolonged.

Description

technical field [0001] The invention relates to a laser surface treatment method, in particular to a method for preparing a self-healing thermal barrier coating based on ultrasonic vibration-assisted laser modification Background technique [0002] With the development of science and technology, aero-engines have a wide range of applications. The parts working in the combustion system will bear higher temperature and higher stress, and the parts will be damaged. In order to improve the service life of parts, thermal barrier coating Layers are applied on the hot end components of engines and gas turbines. Commonly used thermal barrier coatings are composed of a heat-insulating ceramic top layer, an oxidation-resistant bonding layer, thermally grown oxides (TGO) generated by oxidation of the bonding layer, and a superalloy substrate. The ceramic layer is mostly prepared by spraying 7-8% YSZ powder by atmospheric plasma spraying (Air Plasma Spraying, APS) or electron beam phys...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/129C23C4/073C23C4/10C23C4/18
CPCC23C4/134C23C4/129C23C4/073C23C4/10C23C4/18
Inventor 张盼盼孙磊姚建华张群莉姚喆赫
Owner ZHEJIANG UNIV OF TECH
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