Preparation method for thermal-barrier coating

A technology of thermal barrier coating and bonding layer, applied in the field of metal surface treatment, can solve the problem that the oxidation resistance of thermal barrier coating is not improved, etc.

Inactive Publication Date: 2014-03-26
GUANGZHOU RES INST OF NON FERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] American scholar J.M.Drexler et al. (Jet engine coatings for resisting volcanic ash damage, "Advanced Materials", 2011(23), p2419-2423) added Al and Ti powders to

Method used

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  • Preparation method for thermal-barrier coating
  • Preparation method for thermal-barrier coating
  • Preparation method for thermal-barrier coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The nickel-based superalloy K4169 is used as the substrate, and a sample of 10×10×3mm is processed by wire cutting. Use gasoline and alcohol to carry out oily ultrasonic cleaning on the sample in sequence, and use corundum grit to sandblast the surface of the sample under the pressure of 0.1 MPa; use cold spray to prepare a NiCoCrAlYTa bonding layer with a thickness of 50 μm on the surface of the sandblasted sample, The spraying parameters are 25L / h of gasoline, 900L / min of oxygen, and 400mm of spraying distance; use atmospheric plasma spraying to prepare ZrO with a thickness of 100μm on the bonding layer 2 -7wt.Y 2 o 3 Ceramic layer, spraying power 43kW, Ar 60×10 -3 m 3 min -1 , H 2 4×10 -3 m 3 min -1 , spraying distance 110mm; use magnetron target current 2A, bias voltage 150V, air pressure 4×10 -3 Pa, prepare an aluminum film with a thickness of 5 μm on the surface of the ceramic layer; keep it at 700°C for 2h, keep it at 1100°C for 4h, the heating rate is ...

Embodiment 2

[0028]The low-activation steel 316L is used as the substrate, and the sample of 10×10×3mm is processed by wire cutting. Use gasoline and alcohol to clean the sample with oil stains ultrasonically in sequence, and use corundum grit to sandblast the surface of the sample at a pressure of 0.2 MPa; use supersonic flame spraying to prepare a NiAl bond with a thickness of 50 μm on the surface of the sandblasted sample layer, the amount of sprayed gasoline is 25L / h, the amount of oxygen is 900L / min, and the spraying distance is 400mm; use atmospheric plasma spraying to prepare ZrO with a thickness of 150μm on the bonding layer 2 -7wt.Y 2 o 3 Ceramic layer, spraying power 43kW, Ar 60×10 -3 m 3 min -1 , H 2 4×10 -3 m 3 min -1 , spraying distance 110mm; use magnetron target current 2A, bias voltage 150V, air pressure 3×10 -3 Pa, prepare an aluminum film with a thickness of 10 μm on the surface of the ceramic layer; keep it at 700°C for 2h, keep it at 1100°C for 4h, the heating...

Embodiment 3

[0030] The low-activation steel 316L is used as the substrate, and the sample of 10×10×3mm is processed by wire cutting. Use gasoline and alcohol to clean the sample with oil stains ultrasonically in sequence, and use corundum grit to sandblast the surface of the sample under 0.3 MPa pressure; use atmospheric plasma spraying to prepare a NiAl bonding layer with a thickness of 50 μm on the surface of the sandblasted sample , the amount of gasoline sprayed is 25L / h, the amount of oxygen is 900L / min, and the spraying distance is 400mm; use atmospheric plasma spraying to prepare ZrO with a thickness of 200μm on the bonding layer 2 -7wt.Y 2 o 3 Ceramic layer, spraying power 43kW, Ar 60×10 -3 m 3 min -1 , H 2 4×10 -3 m 3 min -1 , spraying distance 110mm; use magnetron target current 2A, bias voltage 150V, air pressure 4×10 -3 Pa, prepare an aluminum film with a thickness of 15 μm on the surface of the ceramic layer; keep it at 700°C for 2h, keep it at 1100°C for 4h, the he...

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Abstract

A preparation method for a thermal-barrier coating comprises the following steps: performing ultrasonic cleaning on alloy or stainless steel successively by gasoline and alcohol, and then performing corundum sand-blast processing; employing ultrasonic flame spraying, low-pressure plasma spraying, atmosphere plasma spraying, cold spraying or electron beam-physical vapor deposition to prepare a NiCoCrAlYTa or NiAl bonding layer with a thickness of 50-200 mu m on the surface of alloy or stainless steel; employing low-pressure plasma spraying, atmosphere plasma spraying, plasma spraying-physical vapor deposition or electron beam-physical vapor deposition to prepare a ZrO2-7 wt% of Y2O3 ceramic layer with a thickness of 100-300 mu m on the above bonding layer; employing magnetron sputtering to prepare an aluminium film with a thickness of 5-30 mu m on the above ceramic layer; and performing heat treatment on the thermal-barrier coating with the aluminium film. The preparation method provided by the invention is capable of improving the anti-oxidation property and the corrosion resisting property of the thermal-barrier coating.

Description

technical field [0001] The invention relates to a metal surface treatment method. Background technique [0002] Thermal barrier coating is to combine heterogeneous materials with certain functions on the surface of high-temperature components in the form of thin films or coatings, so that they have functions such as high temperature resistance, corrosion resistance, wear resistance, and high heat insulation. Widely used in aerospace, energy and other fields. In the field of aviation, thermal barrier coatings with functions such as high-temperature oxidation resistance and heat insulation are the core key technologies for the development of large aircraft engines; A key technology for high efficiency. [0003] The aero-engine is the "heart" of the aircraft, and thermal barrier coating technology is one of the core technologies of the aero-engine, which is applied to key hot-end components such as high-pressure turbine blades, combustion chambers, and cooling channels of the...

Claims

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Application Information

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IPC IPC(8): C23C28/00C23C14/35C23C14/58
CPCY02T50/60
Inventor 周克崧张小锋宋进兵张吉阜邓春明邓畅光刘敏
Owner GUANGZHOU RES INST OF NON FERROUS METALS
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