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Prepn of heat shock resisting heat barrier coating

A technology of thermal barrier coating and thermal shock resistance, which is applied in the direction of coating, overlay layer plating, metal material coating process, etc., can solve the problems of thermal barrier coating methods that have not been reported, and achieve thermal shock resistance Excellent, high porosity, high ionization rate effect

Inactive Publication Date: 2004-11-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] So far, there is no report on the method of compositely preparing thermal barrier coatings by arc ion plating and explosive spraying technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment is a thermal barrier coating with a double-layer structure: an anti-oxidation bonding layer and an insulating ceramic layer as a surface layer. The bonding layer is Ni-20Co-20Cr-8Al-0.5Y, and the ceramic layer is ordinary ZrO 2 -8Y 2 o 3 Powder preparation, control the substrate temperature to less than 150°C. The base material is superalloy M11, and the sample size is 15×10×2mm 3 . The substrate is ground with metallographic sandpaper, cleaned and sandblasted (200 mesh glass shot, wet sprayed). The equipment used is a domestic MIP-8-800 ion coating machine. After the sample is loaded into the furnace, the vacuum degree of the vacuum chamber is raised to 7×10 -3 Pa, through Ar gas, make the pressure rise to 5×10 -2 Pa, add a high bias voltage of -900V, sputter and clean the surface of the sample for about 4 minutes, deposit the bonding layer Ni-20Co-20Cr-8Al-0.5Y, and prepare ordinary ZrO by explosive spraying method 2 -8Y 2 o 3 The technical par...

Embodiment 2

[0026] This embodiment is a thermal barrier coating with a double-layer structure: an anti-oxidation bonding layer and an insulating ceramic layer as a surface layer. The bonding layer is Ni-32Co-20Cr-8Al-0.5Y, and the composition of the ceramic layer is hollow spherical ZrO 2 -8Y 2 o 3 , Control the substrate temperature to less than 150°C. The base material is superalloy M11, and the sample size is 15×10×2mm 3 . Raise the vacuum of the vacuum chamber to 2×10 -3 Pa, into the Ar gas, so that the pressure rose to 6 × 10 -2 Pa, add a high bias voltage of -1000V, sputter and clean the surface of the sample for about 2 minutes, and deposit the bonding layer Ni-32Co-20Cr-8Al-0.5Y by arc ion plating. Preparation of Hollow ZrO by Explosive Spraying Method 2 -8Y 2 o 3 The technical parameters of the ceramic layer are shown in Tables 4 and 5, respectively, and the composition and thickness parameters of the thermal barrier coating are shown in Table 6.

[0027] Vacuum...

Embodiment 3

[0032] Basic composition and size are with embodiment 1. This embodiment is a thermal barrier coating with a three-layer structure: an anti-oxidation bonding layer, a diffusion barrier layer and an insulating surface ceramic layer. The bonding layer is Ni-32Co-20Cr-8Al-0.5YlSi-0.03B, and the diffusion barrier layer is Al 2 o 3, the ceramic layer is made of ordinary ZrO 2 -8Y 2 o 3 Powder preparation, control the substrate temperature to less than 150°C. Using arc ion plating technology, after the sample is loaded into the furnace, the vacuum degree of the vacuum chamber rises to 4×10 -3 Pa, through Ar gas, make the pressure rise to 8×10 -2 Pa, apply a high bias voltage of -800V, sputter and clean the surface of the sample for about 5 minutes, deposit the bonding layer Ni-32Co-20Cr-8Al-0.5Y-1Si-0.03B, and the diffusion barrier layer Al 2 o 3 , the preparation of ordinary ZrO by detonation spraying method 2 -8Y 2 o 3 The technical parameters of the ceramic layer are s...

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Abstract

The heat barrier coating capable of resisting heat shock includes an adhering layer of NiCoCrAlY alloy and a ceramic layer prepared with hollow spherical ZrO2-8Y2O3 powder. The preparation process of the heat barrier coating includes depositing NiCoCrAlY layer of 30-50 micron thickness via an arc ion plating process, and subsequent spraying the ceramic layer of 200-500 micron thickness on the NiCoCrAlY layer via a blasting spraying process. The present invention features that of the heat barrier coating, the adhering NiCoCrAlY layer is homogeneous and compact and has less faults, excellent antioxidant performance and high combining strength with the ceramic layer, and the ceramic layer has high porosity, high heat isolating performance, great strain tolerance and excellent heat shock resisting performance.

Description

technical field [0001] The invention relates to a coating preparation technology, in particular to a method for compositely preparing a thermal shock-resistant thermal barrier coating by using arc ion plating and explosive spraying technology. Background technique [0002] In order to meet the requirements of high-performance engines to reduce temperature gradient, thermally induced stress and material service stability, in addition to developing new materials, improving the design of hot-end parts and adopting film cooling technology, thermal barrier coatings are prepared on the surface of turbine engine superalloy hot-end parts Coatings (TBCs: thermal barrier coatings) are a practical way to increase the operating temperature and engine efficiency of existing superalloys. The thermal barrier coating uses MCrAlY as the bonding layer and ZrO 2 -(7-9)Y 2 o 3 Composite coating for surface insulation. The role of the bonding layer is to protect the substrate from oxidation ...

Claims

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Application Information

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IPC IPC(8): C23C28/00
Inventor 孙超柯培玲武颖娜华伟刚宫骏闻立时王启民肖金泉汪爱英纪爱玲郑静地曹鸿涛
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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