Process method for preparing thermal barrier coating containing diffusion-resistant layer by EB-PVD (electron beam-physical vapor deposition) one-step method

A technology of barrier diffusion layer and thermal barrier coating is applied in the field of preparation of thermal barrier coating containing barrier diffusion layer by EB-PVD one-step method, which can solve the problems of sand contamination of interface quality, processing length, and reduction of high temperature mechanical properties of substrates. , to achieve the effect of simplifying the coating preparation process, low manufacturing cost and simple process

Pending Publication Date: 2022-07-29
AECC AVIATION POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing process is long, and there is a risk of sand particles contaminating the quality of the interface, and the long process is not conducive to product protection and process quality control, affecting the engineering application of thermal barrier coatings
In addition, the serious interdiffusion between the metal bottom layer and the matrix will cause the generation of TCP phase enriched in refractory metal elements in the matrix, thereby reducing the high-temperature mechanical properties of the matrix.

Method used

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  • Process method for preparing thermal barrier coating containing diffusion-resistant layer by EB-PVD (electron beam-physical vapor deposition) one-step method
  • Process method for preparing thermal barrier coating containing diffusion-resistant layer by EB-PVD (electron beam-physical vapor deposition) one-step method
  • Process method for preparing thermal barrier coating containing diffusion-resistant layer by EB-PVD (electron beam-physical vapor deposition) one-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The composite ingot includes 50g of NiAl metal ingot, 3g of C 14 H 10 Bulk material and 500g of ZrO 2 ~8Y 2 O 3 The ceramic ingot, wherein the Ni content in the NiAl metal ingot is 60wt.%, and the Al content is 40%.

[0044] Before loading, wet sand blasting and ultrasonic cleaning are performed on the surface of the parts to ensure that the surface of the parts is free from oil stains, oxides, etc. The cleaned parts are loaded into the loading chamber, and the loading chamber is evacuated so that the parts are at 5×10 ～3 Torr under vacuum conditions.

[0045] Subsequently, the shaft that started the EB-PVD equipment was rotated at 20 rpms to move the part directly above the composite ingot for deposition.

[0046] During the deposition of the diffusion barrier, a heat gun was used to bring the temperature of the part to 900°C. At the same time, increase the current of the evaporation gun to 0.5A so that C 14 H 10 The bulk material is evaporated within 1 min to...

Embodiment 2

[0052] The composite ingot includes 70g of NiAl metal ingot, 4g of C 14 H 10 Bulk material and 600g of ZrO 2 ~8Y 2 O 3 The ceramic ingot, wherein the Ni content in the NiAl metal ingot is 65wt.%, and the Al content is 35%.

[0053] Before loading, wet sand blasting and ultrasonic cleaning are performed on the surface of the parts to ensure that the surface of the parts is free from oil stains, oxides, etc. The cleaned parts are loaded into the loading chamber, and the loading chamber is evacuated so that the parts are at 5×10 ～3 Torr under vacuum conditions.

[0054] Subsequently, the shaft that started the EB-PVD equipment was rotated at 23 rpms to move the part directly above the composite ingot for deposition.

[0055] During the deposition of the diffusion barrier, a heat gun was used to bring the temperature of the part to 930°C. At the same time, increase the current of the evaporation gun to 0.55A, so that C 14 H 10 The bulk material was evaporated within 1.5 m...

Embodiment 3

[0061] The composite ingot includes 90g of NiAl metal ingot, 5g of C 14 H 10 Bulk material and 700g of ZrO 2 ~8Y 2 O 3 A ceramic ingot, wherein the Ni content in the NiAl metal ingot is 70wt.%, and the Al content is 30%.

[0062] Before loading, wet sand blasting and ultrasonic cleaning are carried out on the surface of the parts to ensure that the surface of the parts is free from oil stains, oxides, etc. The cleaned parts are loaded into the loading chamber, and the loading chamber is evacuated so that the parts are at 5×10 ～3 Torr under vacuum conditions.

[0063] Subsequently, the shaft that started the EB-PVD equipment was rotated at 25 rpms to move the part directly above the composite ingot for deposition.

[0064] During the deposition of the diffusion barrier, a heat gun was used to bring the temperature of the part to 950°C. At the same time, increase the current of the evaporation gun to 0.6A, so that C 14 H 10 The bulk material was evaporated within 2 minu...

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Abstract

The invention relates to the technical field of aero-engine turbine blade thermal barrier coatings, in particular to a process method for preparing a thermal barrier coating containing a diffusion resistance layer through an EB-PVD one-step method, the temperature of a part and the current of an electron beam evaporation beam of a composite ingot formed through specific combination are controlled under the vacuum condition, so that the composite ingot is deposited on the part, and the thermal barrier coating containing the diffusion resistance layer is obtained. And a deposited part is obtained. According to the method, continuous deposition and diffusion control of the metal ingot, the diffusion-resistant block, the ceramic ingot and the like are controlled, and meanwhile, process parameters such as deposition temperature and evaporation beam current in the deposition process are combined, so that the thermal barrier coating containing the diffusion-resistant layer is prepared through the one-step method that the EB-PVD equipment enters the furnace for one time.

Description

technical field [0001] The invention relates to the technical field of thermal barrier coatings for aero-engine turbine blades, in particular to an EB-PVD one-step method for preparing a thermal barrier coating containing a diffusion resistance layer. Background technique [0002] Thermal barrier coatings (TBCs) applied to the surface of hot end components such as guide vanes and rotor blades of gas turbine engines have become an issue in the development of high thrust-to-weight ratio aero-engines because they can greatly improve the thermal efficiency and working life of turbine engines. key technology. [0003] At present, due to the advantages of electron beam physical vapor deposition (EB-PVD) technology, which has the advantages of easy and precise control of the chemical composition of the coating, columnar crystal structure, and high bonding strength between the coating and the substrate, it has been widely used in a variety of high temperature protective coatings for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/08C23C14/12C23C14/14C23C14/30C23C14/54
CPCC23C14/083C23C14/14C23C14/12C23C14/30C23C14/541
Inventor 王玉锋杨薇赵志雄赵闯付前刚刘荣杨岩孙晓霞
Owner AECC AVIATION POWER CO LTD
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