Method for depositing thermal barrier coating of porous dentrite ceramic layer by electron beam physical vapor deposition process

A technology of physical vapor deposition and thermal barrier coating, which is applied in coating, metal material coating process, ion implantation plating, etc., can solve the problem of easy sintering of columnar crystal structure, high thermal conductivity of coating, and easy peeling of coating And other problems, to achieve the effect of strong adhesion, low thermal conductivity, good anti-sintering ability

Inactive Publication Date: 2006-10-11
BEIHANG UNIV
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Problems solved by technology

[0004] The ceramic layer prepared by plasma spraying is a layered structure. Its advantages are: there are gaps between layers, and the gaps are perpendicular to the direction of heat flow, which is conducive to improving the heat insulation effect of the coating; however, the coating is easy to peel off and has a short life.
[0005] The ceramic layer prepared by electron beam physical vapor deposition has a columnar crystal struct...

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  • Method for depositing thermal barrier coating of porous dentrite ceramic layer by electron beam physical vapor deposition process
  • Method for depositing thermal barrier coating of porous dentrite ceramic layer by electron beam physical vapor deposition process
  • Method for depositing thermal barrier coating of porous dentrite ceramic layer by electron beam physical vapor deposition process

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Embodiment Construction

[0035] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0036] In the thermal barrier coating of the present invention, a bonding layer and a ceramic layer having a porous dendrite structure are sequentially deposited on the surface of a superalloy substrate, and the rare earth components of the two evaporation source materials used in the ceramic layer are different.

[0037] The present invention is a thermal barrier coating method for depositing a porous dendritic ceramic layer by electron beam physical vapor phase, comprising the following steps:

[0038] (1) Prepare the bonding layer material stick, spare

[0039] The material of the bonding layer is nickel, cobalt, chromium, aluminum and yttrium, and its components in weight percent are 40-60% nickel, 18-22% cobalt, 19-25% chromium, 6-8% aluminum, 0.07% ~1.5% yttrium, the total amount of the above components is 100%;

[0040] (2) feed rod A and fee...

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Abstract

This invention discloses a heat barrier coating method which uses electric beam physics vapor to deposited multi-holes branch ceramic layer, and it deposits a layer of cemented material and ceramic material with multi-holes and branch structure in order on the nickel radical high temperature alloy base surface. The preparation method makes the ceramic layer have lower heat conductivity coefficient by controlling evaporation deposition technique parameter of two sticks A and B which have different components. This invention improves heat barrier coating serving life greatly under high temperature condition.

Description

technical field [0001] The invention relates to a thermal barrier coating method for depositing a porous dendrite ceramic layer by electron beam physical vapor phase, and the prepared ceramic layer of the thermal barrier coating has a porous dendrite structure. Background technique [0002] With the development of modern high technology, especially in the high-temperature environment of gas turbine engines, the single use of existing metal materials can no longer meet the design and use requirements. Thermal barrier coating is a surface thermal protection technology developed in the 1960s. Its design idea is to use the superior high temperature resistance, corrosion resistance and low thermal conductivity of ceramic materials to combine ceramics and metals by coating. The matrix is ​​compounded to improve the high-temperature corrosion resistance of the metal hot-end parts, so that it can withstand higher operating temperatures, and has the effect of increasing the operating...

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Application Information

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IPC IPC(8): C23C14/30C23C14/08C23C14/54
Inventor 宫声凯魏秋利徐惠彬
Owner BEIHANG UNIV
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