Anti-environmental sediment corrosion thermal barrier coating and preparation method thereof

A technology of thermal barrier coatings and deposits, which is applied in coatings, metal material coating processes, mechanical equipment, etc., can solve the problems that in-service thermal barrier coatings are susceptible to CMAS corrosion failure, and achieve excellent CMAS corrosion resistance , low corrosive medium transmittance, and the effect of improving anti-oxidation and corrosion performance

Active Publication Date: 2019-09-13
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Problems solved by technology

[0004] In order to solve the problem that in-service thermal barrier coatings are susceptible to CMAS corrosion failure, the object of the present invention is to provide a thermal barrier coating resistant to environmental sediment (CMAS) corrosion and a preparation method thereof

Method used

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  • Anti-environmental sediment corrosion thermal barrier coating and preparation method thereof
  • Anti-environmental sediment corrosion thermal barrier coating and preparation method thereof
  • Anti-environmental sediment corrosion thermal barrier coating and preparation method thereof

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Embodiment

[0031] The anti-environmental sediment corrosion thermal barrier coating and the preparation method thereof of the present invention comprise the following steps:

[0032] (1) The samples of the hot end parts of the superalloy are subjected to wet blasting treatment, ultrasonic cleaning, acetone solution immersion, and drying.

[0033] The process parameters of wet blowing sand are: by weight percentage, the content of white corundum sand is 30%, and the rest is water; the particle size of white corundum sand is 200 mesh, the wind pressure is 0.20MPa, and the sand blowing distance is 200mm.

[0034] (2) Install the sample on the fixture and fasten it with superalloy wire.

[0035] (3) Install the sample into the vacuum arc plating equipment to deposit the NiCrAlY metal bonding bottom layer, its nominal composition is: Ni-20Cr-11Al-0.5Y, and the specific process parameters are as follows: working pressure 5.32×10 -2Pa, arc current 750A, workpiece voltage 30V, coating time 120m...

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Abstract

The invention belongs to the technology of thermal barrier coatings, and particularly relates to a thermal barrier coating resistant to environmental sediment corrosion, and a preparation method thereof. A high-temperature alloy matrix comprises an MCAlY metal bonding coating formed by vacuum arc plating, plasma spraying or ultrasonic spraying, a YSZ ceramic surface coating formed by plasma spraying or electron beam-physical vapor deposition, and a precious metal pure Pt surface coating formed by magnetron sputtering or multi-arc ion plating in sequence; the thickness of the NiCrAlY metal bonding coating is 0.05-0.15 mm, and the thickness of the YSZ ceramic surface coating is 30 [mu]m-100 [mu]m; and the thickness of the precious metal pure Pt surface coating is 10 [mu]m-60 [mu]m. By adopting a thermal barrier coating system composed of the NiCrAlY metal bonding coating, the YSZ ceramic surface coating and the precious metal pure Pt surface coating, the CMAS corrosion can be prevented effectively; and the reliability of the thermal barrier coating is improved, and the service life of the thermal barrier coating is prolonged.

Description

technical field [0001] The invention belongs to the thermal barrier coating technology, in particular to an anti-environmental sediment corrosion thermal barrier coating and a preparation method thereof. Background technique [0002] Thermal barrier coatings (Thermal Barrier Coatings, TBCs) is one of the key technologies of high-temperature hot-end parts of advanced aero-engines. +Co) and ceramic surface layer with low thermal conductivity (Y 2 o 3 Partially stabilized ZrO 2 , YSZ) composition. It attaches equal importance to high-temperature alloy material technology and cooling technology, and has become one of the key technologies for the development of high-performance aero-engines. The use of thermal barrier coatings on aero-engines will enable superalloys to withstand higher service temperatures and increase the gas inlet temperature before the turbine. At the same time, it will also greatly improve engine life and reliability, reduce fuel consumption, and improve ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C19/07C22C30/00C23C28/00F02C7/24
Inventor 程玉贤王璐张春刚袁福河朱晓宇
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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