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Multipurpose low-conductivity ceramic/noble metal lamellar composite thermal barrier coating

A thermal barrier coating, layered composite technology, applied in the direction of metal material coating process, coating, superimposed layer plating, etc., to achieve the effect of inhibiting high-temperature evaporation, avoiding instability, and improving anti-oxidation performance

Inactive Publication Date: 2012-02-08
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In summary, due to the material and structure of the existing thermal barrier coatings, there are a series of problems to be solved in terms of mechanical properties, high temperature corrosion resistance, temperature resistance, and heat insulation effect, and it is urgent to develop new ones. Structural Thermal Barrier Coatings

Method used

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  • Multipurpose low-conductivity ceramic/noble metal lamellar composite thermal barrier coating
  • Multipurpose low-conductivity ceramic/noble metal lamellar composite thermal barrier coating
  • Multipurpose low-conductivity ceramic/noble metal lamellar composite thermal barrier coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: YSZ / Pt layered composite thermal barrier coating

[0036] according to figure 2 In the way shown in (a), the YSZ layer is deposited by electron beam physical vapor deposition and the Pt layer is deposited by magnetron sputtering alternately on the surface of DZ125 superalloy. The thickness of the YSZ layer is 20 mm, the thickness of the Pt layer is 1 mm, and 10 layers are alternately deposited. The prepared YSZ / Pt layered composite thermal barrier coating was tested in an air environment of 1200°C for 200 hours, which proved to have excellent heat insulation effect, as well as excellent resistance to peeling, cracking, thermal shock and high temperature oxidation.

Embodiment 2

[0037] Example 2: YSZ / Pt-20%Au Layered Composite Thermal Barrier Coating

[0038] according to figure 2 In the way shown in (b), the YSZ layer is deposited by electron beam physical vapor deposition and the Pt-20%Au layer is deposited by magnetron sputtering alternately on the surface of DZ125 superalloy. First alternately deposit 2 layers of 1mm YSZ layer and 1mm Pt-20%Au layer, and then alternately deposit 10 layers of 20mm YSZ layer and 1mm Pt-20%Au layer. The prepared YSZ / Pt-20%Au layered composite thermal barrier coating was tested in an air environment of 1200°C for 200 hours, which proved to have excellent heat insulation effect, as well as excellent resistance to peeling, cracking, thermal shock and high temperature oxidation performance.

Embodiment 3

[0039] Example 3: Deposition of YSZ / Pt-20%Au Layered Composite Thermal Barrier Coating on MCrAlY Alloy Coating

[0040] according to figure 2 In the way shown in (c), magnetron sputtering is used to deposit a layer of 30mm MCrAlY alloy coating on the surface of DZ125 superalloy (the specific composition is 10%Co, 25%Cr, 5%Al, 0.1%Y, and the rest is Ni) , and then alternately deposit a 20mm layer of YSZ by electron beam physical vapor deposition and a 1mm layer of Pt-20%Au by magnetron sputtering, 10 layers each. The prepared MCrAlY alloy coating+YSZ / Pt-20%Au layered composite thermal barrier coating was tested in an air environment of 1200°C for 200 hours, which proved to have excellent heat insulation effect, as well as excellent resistance to peeling, cracking and thermal shock performance and high temperature oxidation resistance.

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Abstract

The invention discloses a multipurpose low-conductivity ceramic / noble metal lamellar composite thermal barrier coating, relating a composite material and coating technology. The coating is divided into four types: (1) regularly and alternatively depositing low-conductivity ceramic layers and noble metal layers; (2) irregularly and alternatively depositing low-conductivity ceramic layers and noblemetal layers; (3) exerting low-conductivity ceramic and noble metal lamellar composite thermal barrier coatings on antioxidant protection layers deposited on the surface of a basic alloy; and (4) depositing other functional coatings on the outer surface of the low-conductivity ceramic / noble metal lamellar composite thermal barrier coating. According to the invention, the lamellar composite thermal barrier coating formed by alternatively depositing the low-conductivity ceramic layers and the noble metal layers has the advantages of excellent thermal insulation performance and thermal shock resistance, stable coating structure and long service life and can be applied to the high temperature protection of hot end components of refractory alloys or high temperature alloys such as an aircraft engine, a marine engine, a ground gas turbine, a rocket engine, and the like.

Description

technical field [0001] The invention relates to a composite material and coating technology, which is used to increase the service temperature of high-temperature alloys and refractory alloys, improve the bonding force between the coating and the matrix alloy under thermal shock conditions, and improve the resistance to high-temperature oxidation, high-temperature vulcanization and thermal corrosion And low melting point ash corrosion resistance, avoiding the reduction of the mechanical properties of the alloy matrix, and prolonging the service life of the hot end parts. Background technique [0002] Thermal barrier coatings (TBCs for short) use the high temperature resistance, corrosion resistance and low thermal conductivity of ceramic materials to combine ceramics and metal substrates in the form of coatings to increase the working temperature of metal hot end parts and enhance The high-temperature oxidation resistance of the hot-end parts can prolong the service life of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00F01D5/28
CPCY02T50/60
Inventor 何业东马晓旭王德仁张津姚俊奇邓舜杰
Owner UNIV OF SCI & TECH BEIJING
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