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Method for preparing porous thermal barrier coating through selective laser sintering

A technology of selective laser sintering and thermal barrier coating, which is applied in coating, superimposed layer plating, metal material coating process, etc., can solve the problem of poor thermal insulation effect, inability to prepare thermal barrier coating, strain tolerance To improve the cooling effect, good strain tolerance, and solve the effect of composition segregation

Pending Publication Date: 2021-11-30
苏州金航纳米技术研究有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0002] The preparation of thermal barrier coatings on the surface of turbine blades is an effective way to increase the thrust of aero-engines. The current methods of preparing thermal barrier coatings mainly include atmospheric plasma spraying (APS) and electron beam physical vapor deposition (EB-PVD) methods. , the thermal barrier coating prepared by APS has a layered structure, which has good thermal insulation effect, but poor strain tolerance; the thermal barrier coating prepared by EB-PVD has good strain tolerance and strong interfacial bonding, but poor thermal insulation effect, and For some thermal barrier coating materials such as lanthanum magnesium aluminate, neither of these two methods can prepare qualified thermal barrier coatings, and it is urgent to develop new methods to obtain high-performance thermal barrier coatings

Method used

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  • Method for preparing porous thermal barrier coating through selective laser sintering
  • Method for preparing porous thermal barrier coating through selective laser sintering

Examples

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Embodiment 1

[0033] In this implementation example, the material of the turbine blade 1 is DD6 single crystal nickel-based superalloy, the material of the bonding layer 2 is NiCoCrAlY, and the particle size distribution of the ceramic powder 4 is Gd of 0.5-2um. 2 Zr 2 o 7 Powder, the preparation of the porous thermal barrier coating of this implementation example comprises the following steps:

[0034] Step 1: Prepare a bonding layer 2 with a thickness of 50 μm on the surface of the turbine blade 1 by arc ion plating;

[0035] Step 2: laying a layer of ceramic powder 4 with a thickness of 5um on the bonding layer 2;

[0036] Step 3: Using a pulsed laser to prepare a plurality of regularly arranged columnar sintering areas 3 on the surface of the adhesive layer 2, the columnar sintering areas 3 arranged in different rows are arranged in a staggered manner, and the feature is that the same row and the next row are adjacent to each other Three columnar sintering zones 3 centers are connect...

Embodiment 2

[0045] In this implementation example, the material of the turbine blade 1 is DD6 single crystal nickel-based superalloy, the material of the bonding layer 2 is NiAl alloy, and the ceramic powder 4 is LaMgAl with a particle size distribution of 0.2-1um. 11 o 19 Powder, the preparation of the porous thermal barrier coating of this implementation example comprises the following steps:

[0046] Step 1: Prepare a bonding layer 2 with a thickness of 100 μm on the surface of the turbine blade 1 by arc ion plating;

[0047] Step 2: laying a layer of ceramic powder 4 with a thickness of 5um on the bonding layer 2;

[0048] Step 3: Using a pulsed laser to prepare a plurality of regularly arranged columnar sintering areas 3 on the surface of the adhesive layer 2, the columnar sintering areas 3 arranged in different rows are arranged in a staggered manner, and the feature is that the same row and the next row are adjacent to each other Three columnar sintering zones 3 centers are conne...

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Abstract

The invention belongs to the technical field of coatings, and particularly relates to a method for preparing a porous thermal barrier coating through selective laser sintering. According to the method, ceramic layers are prepared in a layered mode, each ceramic layer is sintered into a cylindrical sintering area through laser, large gaps are reserved, the different layers are stacked in a staggered mode, and therefore the thermal barrier coating structure with a large number of communicated gaps is formed, and the thermal insulation effect is improved; and cooling airflow can be introduced into the communicating structure, so that the cooling effect is greatly improved, and as laser sintering is adopted, metallurgical bonding is realized among materials, and the mechanical property is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a method for preparing a porous thermal barrier coating by selective laser sintering. Background technique [0002] The preparation of thermal barrier coatings on the surface of turbine blades is an effective way to increase the thrust of aero-engines. The current methods of preparing thermal barrier coatings mainly include atmospheric plasma spraying (APS) and electron beam physical vapor deposition (EB-PVD) methods. , the thermal barrier coating prepared by APS has a layered structure, which has good thermal insulation effect, but poor strain tolerance; the thermal barrier coating prepared by EB-PVD has good strain tolerance and strong interfacial bonding, but poor thermal insulation effect, and For some thermal barrier coating materials such as lanthanum magnesium aluminate, neither of these two methods can prepare qualified thermal barrier coatings, and it is urgent to devel...

Claims

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Application Information

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IPC IPC(8): C23C14/32C23C14/16C23C26/00C23C28/00B28B1/00B33Y10/00B33Y80/00
Inventor 花银群戴峰泽叶云霞蔡杰
Owner 苏州金航纳米技术研究有限公司