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MAX phase coating for resisting molten CMAS corrosion of thermal barrier coating and thermal spraying preparation method

A thermal barrier coating, anti-melting technology, applied in the direction of fusion spraying, coating, metal material coating process, etc., can solve problems such as corrosion damage of thermal barrier coating, and achieve the effect of improving adaptability

Active Publication Date: 2020-04-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that traditional YSZ thermal barrier coatings are susceptible to CMAS corrosion damage, the present invention proposes a new corrosion protection layer scheme and preparation method using MAX phase ceramic coatings as YSZ coatings

Method used

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  • MAX phase coating for resisting molten CMAS corrosion of thermal barrier coating and thermal spraying preparation method
  • MAX phase coating for resisting molten CMAS corrosion of thermal barrier coating and thermal spraying preparation method
  • MAX phase coating for resisting molten CMAS corrosion of thermal barrier coating and thermal spraying preparation method

Examples

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Effect test

Embodiment 1

[0040] Example 1: Preparation of a thermal barrier coating resistant to molten CMAS corrosion. The coating consists of a high-temperature alloy substrate, a NiCrAlY bonding layer, a YSZ ceramic layer, and Ti 2 AlC ceramic layer and its pre-oxidized layer composition, of which Ti 2 The AlC coating is prepared by supersonic flame spraying method, including the following steps:

[0041] In the first step, YSZ ceramic coating is prepared on the superalloy substrate with NiCrAlY bonding layer.

[0042] The YSZ ceramic layer is prepared on the surface of the NiCrAlY bonding layer by atmospheric plasma spraying. The main process parameters are as follows: spraying voltage 60V, current 600A, main gas Ar flow rate 40slpm, H 2 The flow rate is 10slpm, the powder feeding rate is 15g / min, the spraying distance is 100mm, and the thickness of the YSZ ceramic layer obtained is 150μm.

[0043] The second step is to prepare Ti for supersonic flame spraying 2 AlC powder.

[0044] For supply Ti 2 The Al...

Embodiment 2

[0053] Example 2: Preparation of a thermal barrier coating resistant to molten CMAS corrosion. The coating consists of a high-temperature alloy substrate, a NiCrAlY bonding layer, a YSZ ceramic layer, and Ti 2 AlC ceramic layer and its pre-oxidized layer composition, of which Ti 2 The AlC coating is prepared by supersonic flame spraying method, including the following steps:

[0054] In the first step, YSZ ceramic coating is prepared on the superalloy substrate with NiCrAlY bonding layer.

[0055] The YSZ ceramic layer is prepared on the surface of the NiCrAlY bonding layer by atmospheric plasma spraying. The main process parameters are as follows: spraying voltage 60V, current 600A, main gas Ar flow rate 40slpm, H 2 The flow rate is 10slpm, the powder feeding rate is 15g / min, the spraying distance is 100mm, and the thickness of the YSZ ceramic layer obtained is 150μm.

[0056] The second step is to prepare Ti for supersonic flame spraying 2 AlC powder.

[0057] For supply Ti 2 The Al...

Embodiment 3

[0064] Example 3: Preparation of a thermal barrier coating resistant to molten CMAS corrosion. The coating consists of a high-temperature alloy matrix, a NiCrAlY bonding layer, a YSZ ceramic layer, and Ti 3 AlC 2 Ceramic layer and its pre-oxidized layer composition, of which Ti 3 AlC 2 The coating is prepared by supersonic flame spraying method, including the following steps:

[0065] In the first step, YSZ ceramic coating is prepared on the superalloy substrate with NiCrAlY bonding layer.

[0066] The YSZ ceramic layer is prepared on the surface of the NiCrAlY bonding layer by atmospheric plasma spraying. The main process parameters are as follows: spraying voltage 60V, current 600A, main gas Ar flow rate 40slpm, H 2 The flow rate is 10slpm, the powder feeding rate is 15g / min, the spraying distance is 100mm, and the thickness of the YSZ ceramic layer obtained is 150μm.

[0067] The second step is to prepare Ti for supersonic flame spraying 3 AlC 2 powder.

[0068] For supply Ti 3 AlC...

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Abstract

The invention relates to an MAX phase coating for resisting molten CMAS corrosion of a thermal barrier coating and a thermal spraying preparation method. The thermal barrier coating system adopting the MAX phase ceramic coating as a corrosion protection layer comprises an alloy matrix, a bonding layer, a YSZ ceramic layer, an MAX phase ceramic layer and a pre-oxidation layer. The method comprisesthe steps that firstly, MAX phase Ti2AlC or Ti3AlC2 powder or suspension for thermal spraying is prepared, the particle size of the powder is 10-100 microns, and the suspension is a water base or an ethanol base and is neutral or acidic; then, a hypersonic flame spraying method or a suspension plasma spraying method or a plasma spraying-physical vapor deposition method is adopted for preparation;and heat treatment is carried out to form a pre-oxidation layer on the surface. The thickness of the prepared ceramic layer is 10-20[mu]m, and the porosity is 3-10%. The thermal barrier coating, whichcomprises the MAX phase coating and is resistant to molten CMAS corrosion, is used for surface protection of aero-engine hot-end components, and the adaptability of the hot-end components in severe high-temperature and corrosive environments can be effectively improved.

Description

Technical field [0001] The invention belongs to the technical field of thermal barrier coatings, and specifically refers to a corrosion protection layer used for YSZ thermal barrier coatings against environmental deposits CMAS corrosion and a thermal spraying preparation method thereof; especially for thermal barrier coatings to resist molten CMAS corrosion MAX phase coating and thermal spraying preparation method. Background technique [0002] Thermal Barrier Coatings (TBCs) is one of the core technologies of aero-engine turbine blades. This technology combines high-temperature, low thermal conductivity, and corrosion-resistant ceramic materials on the base metal in the form of coatings. Reduce the surface temperature of hot end components, extend the life of engine components, increase engine operating temperature and significantly improve engine thermal efficiency and performance. The harsh working environment requires the thermal barrier coating to have a complex multilayer ...

Claims

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Application Information

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IPC IPC(8): C23C4/10C23C4/129C23C4/134C23C4/137C23C4/18C23C4/02
CPCC23C4/10C23C4/129C23C4/134C23C4/137C23C4/18C23C4/02Y02T50/60
Inventor 郭磊颜正
Owner TIANJIN UNIV
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