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Preparation method of supersonic plasma spraying ceramic/metal thermal protection coating on surface of aluminum alloy

A supersonic plasma and aluminum alloy surface technology, which is applied in the direction of metal material coating process, coating, fusion spraying, etc., can solve the problem of no relevant reports on thermal protection coatings, and meet the requirements of thermal protection and excellent mechanical properties and thermal shock resistance, high hardness effect

Pending Publication Date: 2021-01-29
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no relevant report at home and abroad on the research of thermal protection coating on the surface of aluminum alloy substrate.

Method used

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  • Preparation method of supersonic plasma spraying ceramic/metal thermal protection coating on surface of aluminum alloy
  • Preparation method of supersonic plasma spraying ceramic/metal thermal protection coating on surface of aluminum alloy
  • Preparation method of supersonic plasma spraying ceramic/metal thermal protection coating on surface of aluminum alloy

Examples

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Effect test

Embodiment 1

[0025] A method for preparing a supersonic plasma sprayed ceramic / metal thermal protective coating on the surface of an aluminum alloy, the specific steps are:

[0026] a) Sandblasting, degreasing and drying the surface of the 7A04 aluminum alloy;

[0027] b) Using supersonic plasma spraying technology to deposit pure Mo bonding bottom layer on the surface of 7A04 aluminum alloy treated in step a), the thickness of the bonding bottom layer is 200 μm; the supersonic plasma spraying process parameters are: main air flow rate 160L / min, auxiliary gas The flow rate is 40L / min, the current is 550A, the voltage is 150V, and the power is 80kW.

[0028] c) Depositing an 8YSZ ceramic surface layer on the surface of the Mo-based bonding underlayer in step b) by supersonic plasma spraying technology, the thickness of the ceramic surface layer being 600 μm. The supersonic plasma spraying process parameters are: main gas flow rate 120L / min, auxiliary gas flow rate 80L / min, current 550A, vo...

Embodiment 2

[0040] A method for preparing a supersonic plasma sprayed ceramic / metal thermal protective coating on the surface of an aluminum alloy, the specific steps are:

[0041] a) Sandblasting, degreasing and drying the surface of 7075 aluminum alloy;

[0042] b) Supersonic plasma spraying technology is used to deposit a TZM molybdenum alloy bonding bottom layer on the surface of the 7075 aluminum alloy treated in step a), and the thickness of the bonding bottom layer is 150 μm; the process parameters of supersonic plasma spraying are: main air flow rate 140L / min, The auxiliary gas flow rate is 60L / min, the current is 500A, the voltage is 140V, and the power is 70kW.

[0043] c) Depositing Al on the surface of the TZM bonding underlayer in step b) using supersonic plasma spraying technology 2 o 3Ceramic surface layer, the thickness of the ceramic surface layer is 650μm; the process parameters of supersonic plasma spraying are: main air flow rate 100L / min, auxiliary air flow rate 100...

Embodiment 3

[0046] A method for preparing a supersonic plasma sprayed ceramic / metal thermal protective coating on the surface of an aluminum alloy, the specific steps are:

[0047] a) Sandblasting, degreasing and drying the surface of the 2A14 aluminum alloy;

[0048] b) Supersonic plasma spraying technology is used to deposit a TZC bonding bottom layer on the surface of the 2A14 aluminum alloy treated in step a), and the thickness of the bonding bottom layer is 120 μm; the supersonic plasma spraying parameters are: main air flow rate 130L / min, auxiliary air flow rate 70L / min, current 480A, voltage 130V, power 65kW.

[0049] c) Deposit La on the surface of the TZC bonding underlayer in step b) using supersonic plasma spraying technology 2 Ce 2 o 7 Rare earth zirconate ceramic surface layer, the thickness of the ceramic surface layer is 680μm; supersonic plasma spraying parameters are: main air flow rate 90L / min, auxiliary air flow rate 90L / min, current 480A, voltage 120V, power 52kW. ...

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Abstract

The invention discloses a preparation method of a supersonic plasma spraying ceramic / metal thermal protection coating on the surface of an aluminum alloy. The preparation method comprises the steps that sand blasting, oil removal and drying treatment are carried out on the surface of the aluminum alloy; a metal bonding bottom layer with the thickness ranging from 100 micrometers to 200 micrometersis deposited on the surface of the aluminum alloy treated in the step (1) through the supersonic plasma spraying technology; and a ceramic surface layer with the thickness ranging from 600 micrometers to 700 micrometers is deposited on the surface of the metal bonding bottom layer prepared in the step (2) by adopting the supersonic plasma spraying technology to obtain the required ceramic / metal composite thermal protection coating. The preparation process is scientific and reasonable, and the prepared ceramic / metal composite thermal protection coating has the characteristics of high bonding strength, compact coating and high hardness, meanwhile, excellent mechanical properties and thermal shock resistance are achieved, and the thermal protection requirements are met; and the coating can be used as a preferred material for preparing engine combustors.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to a method for preparing a supersonic plasma sprayed ceramic / metal thermal protective coating on the surface of an aluminum alloy. Background technique [0002] Aluminum alloy has many excellent properties such as light weight, good processing plasticity, good heat dissipation performance, and high specific strength. It has become the preferred material for making engine combustion chambers and is widely used in aviation, aerospace, weapons and other fields. However, the aluminum alloy material has a low melting point and poor thermal strength. Under the continuous erosion of the high temperature, high pressure and high frequency heat flow in the combustion chamber, the aluminum alloy cannot meet the thermal protection requirements. [0003] Using supersonic plasma spraying technology to prepare ceramic thermal protective coatings on the surface of component...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/11C23C4/08C23C4/134
CPCC23C4/11C23C4/08C23C4/134
Inventor 刘光王晓霞贾利陈杰崔烺徐国辉
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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