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Method for preparing thermal barrier coating by laser compound plasma spraying

A thermal barrier coating, plasma technology, applied in the coating, metal material coating process, melt spraying and other directions, can solve the problem of difficult to give full play to surface purification and roughening, can not effectively improve the interface bonding strength, prolong the service life, etc. The problem is to overcome the incomplete purification, improve the thermal shock resistance and mechanical properties, and improve the bonding strength of the interface.

Inactive Publication Date: 2010-07-07
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Purification and roughening of the surface of the substrate is an effective method to improve the bonding strength of the coating and the substrate interface. Interface bonding strength, prolong service life

Method used

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  • Method for preparing thermal barrier coating by laser compound plasma spraying
  • Method for preparing thermal barrier coating by laser compound plasma spraying
  • Method for preparing thermal barrier coating by laser compound plasma spraying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Cut the Inconel738 nickel alloy into Φ25mm×4mm by wire cutting;

[0024] 2) Polish the surface of the cut Inconel738 nickel alloy with 100#, 400#, 600#, 800#, 1000#, 1200# sandpaper;

[0025] 3) Clean the surface of the polished Inconel738 nickel alloy with pulsed laser under vacuum. The specific process parameters are: laser energy density 10mJ / cm 2 , pulse width 5ns, wavelength 1064nm, repetition frequency 10Hz, incident angle 10°;

[0026] 4) The surface of the cleaned Inconel738 nickel alloy is subjected to laser roughening treatment, and the specific process parameters are: laser energy density 0.5kJ / cm 2 , pulse width 0.2ms, defocus amount -0.5mm, scanning speed 2mm / s, auxiliary gas nitrogen, pressure 1MPa, roughened material surface;

[0027] 5) ZrO with an average particle size of 100 μm 2 -10wt% Y 2 o 3Put the powder into the powder feeder, fix the coarsened Inconel738 nickel alloy on the turntable, and prepare 300 μm thick ZrO by vacuum plasma spraying...

Embodiment 2

[0033] 1) Add Nd 15 Fe 79 B 6 The alloy is cut into Φ25mm×4mm by wire cutting;

[0034] 2) Cut the Nd 15 Fe 79 B 6 The surface of the alloy is polished with 100#, 400#, 600#, 800#, 1000#, 1200# sandpaper in sequence;

[0035] 3) The polished Nd 15 Fe 79 B 6 The surface of the alloy is cleaned by pulsed laser under the protection of argon. The specific process parameters are: laser energy density 50mJ / cm 2 , pulse width 10ns, wavelength 266nm, repetition frequency 10Hz, incident angle 30°;

[0036] 4) The cleaned Nd 15 Fe 79 B 6 The surface of the alloy is subjected to laser roughening treatment, and the specific process parameters are: laser energy density 5kJ / cm 2 , pulse width 0.6ms, defocus amount 2mm, scanning speed 6mm / s, auxiliary gas argon, pressure 0.5MPa, roughened material surface;

[0037] 5) La with an average particle size of 20nm 2 (Zr 0.8 Ce 0.2 ) 2 o 7 The powder is granulated to 30 μm and loaded into the powder feeder, and the coarsened Nd ...

Embodiment 3

[0043] 1) Cut the AE435 nickel alloy into Φ25mm×4mm by wire cutting;

[0044] 2) Polish the surface of the cut AE435 nickel alloy with 100#, 400#, 600#, 800#, 1000#, 1200# sandpaper in sequence;

[0045] 3) Clean the surface of the polished AE435 nickel alloy with a pulsed laser under argon protection. The specific process parameters are: laser energy density 20mJ / cm 2 , pulse width 7ns, wavelength 532nm, repetition frequency 10Hz, incident angle 90°;

[0046] 4) The surface of the cleaned AE435 nickel alloy is subjected to laser roughening treatment, and the specific process parameters are: laser energy density 4.5kJ / cm 2 , pulse width 1ms, defocus amount 3mm, scanning speed 3.5mm / s, auxiliary gas argon, pressure 5MPa, roughened material surface;

[0047] 5) Ca with an average particle size of 100nm 0.9 Sr 0.1 ZrO 3 The powder is granulated to 50 μm and loaded into the powder feeder, the coarsened AE435 nickel alloy is fixed on the turntable, and 200 μm thick Ca is prepa...

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Abstract

The invention discloses a method for preparing a thermal barrier coating by laser compound plasma spraying, which relates to the field of surface coatings. The method comprises the following steps: 1) cutting a material to be treated into required size by adopting line cutting; 2) polishing the surface of the cut material by using abrasive paper; 3) cleaning the surface of the polished material by adopting pulse laser; 4) performing laser texturing treatment on the surface of the cleaned material to roughen the surface of the material; and 5) filling spraying material powder into a powder feeder, fixing the roughened material on a turntable, and preparing the thermal barrier coating by plasma spraying; or first preparing a middle adhesive layer, then repeating the cleaning and texturing processes in the steps 3) and 4), and preparing the thermal barrier coating by the plasma spraying process. The interface of the thermal barrier coating prepared by the method is firmly combined, and the thermal shock resistance and mechanical property of the thermal barrier coating are remarkably improved. The method has simple processes, is suitable for large-scale mass production, and can prepare the high-performance thermal barrier coating with firm interface combination.

Description

technical field [0001] The invention relates to the field of surface coating materials, in particular to a method for preparing a thermal barrier coating by laser composite plasma spraying. Background technique [0002] Thermal barrier coatings refer to ceramic coating materials with excellent thermal insulation properties, usually consisting of a metal bonding layer and a heat-resistant oxide ceramic layer. Thermal barrier coatings can effectively reduce the operating temperature of high-temperature components and avoid high-temperature oxidation, corrosion, and wear. Currently, they are widely used in high-temperature components such as jet engines, gas turbine blades, guide vanes, airfoils, and turbine propellers. [0003] The concept of thermal barrier coating was proposed in the early 1950s, and the earliest used thermal barrier coating material was ZrO 2 Ceramics have high melting point, low thermal conductivity, good thermal shock resistance, large thermal expansion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12C23C4/02C23C4/11C23C4/134
CPCY02T50/60
Inventor 崔熙贵程晓农崔承云许晓静张朝阳鲁金忠管海兵钱晓明
Owner JIANGSU UNIV
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