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Aluminum yttrium magnesium co-diffusion powder coating diffusion agent, preparation method and coating method thereof

A coating and co-infiltration technology, which is applied in the direction of solid diffusion coating, metal material coating process, coating, etc., can solve the problems of unsatisfactory high temperature oxidation resistance and hot corrosion resistance

Inactive Publication Date: 2011-11-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The publication number is CN 1425796A, which discloses a method of powder embedding infiltration agent and embedding aluminizing agent, forming FeAl and Fe on the steel surface. 3 Al phase, the oxide film formed by it is relatively stable, which can improve the oxidation resistance of the metal. Since the application temperature of steel is low, this single aluminized diffusion coating is suitable for nickel-based superalloys with high application temperature. The high temperature oxidation resistance and hot corrosion resistance are not ideal. In recent years, modified aluminide coatings have been a research hotspot.

Method used

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  • Aluminum yttrium magnesium co-diffusion powder coating diffusion agent, preparation method and coating method thereof
  • Aluminum yttrium magnesium co-diffusion powder coating diffusion agent, preparation method and coating method thereof
  • Aluminum yttrium magnesium co-diffusion powder coating diffusion agent, preparation method and coating method thereof

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Embodiment 1

[0031] This embodiment is a kind of aluminum yttrium magnesium co-infiltration powder coating infiltration agent for nickel-based superalloy anti-oxidation coating, including Al powder, Y 2 o 3 , Mg powder, NH 4 Cl and Al 2 o 3 , where Al powder, Y 2 o 3 , Mg powder Al 2 o 3 All are powdery particles.

[0032] In the present embodiment, the Al powder is 5% by weight, and the particle size is 180 mesh; Y 2 o 3 2% by weight, particle size is 220 mesh; Mg powder is 1% by weight, particle size is 200 mesh; NH 4 Cl is 2% by weight; Al 2 o 3 It is 90% by weight, and the particle size is 180 mesh. The total is equal to one hundred percent.

[0033] When preparing aluminum yttrium magnesium co-infiltration powder coating infiltration agent:

[0034] The first step is to prepare the aluminum yttrium magnesium co-infiltration powder coating infiltration agent prefabricated body; the Al powder of the powdery particles, Y 2 o 3 , Mg powder, NH 4 Cl and Al 2 o 3 Prepare ...

Embodiment 2

[0039] This embodiment is a kind of aluminum yttrium magnesium co-infiltration powder coating infiltration agent for nickel-based superalloy anti-oxidation coating, including Al powder, YCl 3 , Mg powder, NH 4 Cl and Al 2 o 3 , where Al powder, YCl 3 , Mg powder and Al 2 o 3 All are powdery particles.

[0040] In this embodiment, the Al powder is 6% by weight, and the particle size is 200 mesh; YCl 3 4% by weight, particle size is 180 mesh; Mg powder is 2% by weight, particle size is 220 mesh; NH 4 Cl is 3% by weight; Al 2 o 3 It is 85% by weight, and the particle size is 200 mesh. The total is equal to one hundred percent.

[0041] When preparing aluminum yttrium magnesium co-infiltration powder coating infiltration agent:

[0042] The first step is to prepare the aluminum yttrium magnesium co-infiltration powder coating infiltration agent prefabricated body; the Al powder of the powdery particles, YCl 3 , Mg powder, NH 4 Cl and Al 2 o 3 Prepare according to th...

Embodiment 3

[0047] This embodiment is a kind of aluminum yttrium magnesium co-infiltration powder coating infiltration agent for nickel-based superalloy anti-oxidation coating, including Al powder, YCl 3 , Mg powder, NH 4 Cl and Al 2 o 3 , where Al powder, YCl 3 , Mg powder and Al 2 o 3 All are powdery particles.

[0048] In this embodiment, the Al powder is 8% by weight, and the particle size is 220 mesh; YCl 3 6% by weight, particle size is 200 mesh; Mg powder is 3% by weight, particle size is 180 mesh; NH 4 Cl is 4% by weight; Al 2 o 3 It is 79% by weight, and the particle size is 180 mesh. The total is equal to one hundred percent.

[0049] When preparing aluminum yttrium magnesium co-infiltration powder coating infiltration agent:

[0050]The first step is to prepare the aluminum yttrium magnesium co-infiltration powder coating infiltration agent prefabricated body; the Al powder of the powdery particles, YCl 3 , Mg powder, NH 4 Cl and Al 2 o 3 Prepare according to the...

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Abstract

The invention discloses an aluminum yttrium magnesium co-diffusion powder coating diffusion agent, a preparation method and a coating method thereof. The aluminum yttrium magnesium co-diffusion powder coating diffusion agent is a composition which comprises the following components by weight percent: 5-10% of Al powder, 2-8% of Y2O3 or YCl3, 1-5% of Mg powder, 2-5% of NH4Cl and 72-90% of Al2O3. The Y2O3 is added in the diffusion agent, thereby not only refining the structure of a coating, but also producing the obvious catalytic role and improving the thickness of an aluminized coating; and the addition of Mg element in the diffusion agent can lead the color of the surface of a co-diffusion sample to change from dark blue to grey. The adoption of the diffusion agent can conveniently carryout aluminum yttrium magnesium co-diffusion coating treatment on the surface of a nickel-based high-temperature alloy, form a diffusion type anti-oxidation nickel aluminum coating containing Y and Mgelements on the surface of the nickel-based high-temperature alloy, lead an Al2O3 film to be more compact according to oxidation process, increase the anti-stripping performance of the Al2O3 film andfurther improve the anti-oxidation performance of the coating.

Description

technical field [0001] The invention relates to the technical field of thermal protection of superalloys, in particular to a powder coating penetrating agent for an anti-oxidation coating of a nickel-based superalloy and a preparation method thereof. Background technique [0002] With the increase of the flight speed of aerospace vehicles, the service temperature of hot-end parts of aero-engines and aerospace vehicles generally increases, and higher requirements are put forward for the high-temperature oxidation resistance of nickel-based superalloys for related parts. The aluminum coating is due to the Al formed after oxidation 2 o 3 The film has high protection and is a common method to solve the oxidation problem of nickel-based superalloys, accounting for more than 90% of the diffusion-type protective coating. [0003] The publication number is CN 1425796A, which discloses a method of powder embedding infiltration agent and embedding aluminizing agent, forming FeAl and...

Claims

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Application Information

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IPC IPC(8): C23C10/52
Inventor 胡锐李金山马健张铁邦寇宏超钟宏傅恒志
Owner NORTHWESTERN POLYTECHNICAL UNIV
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