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Preparation method and application of alpha-Al2O3 film

A technology of film and film layer, which is applied in the field of preparation of α-Al2O3 film, can solve the problems of peeling and peeling, high production cost, poor bonding force, etc., and achieve the effect of good compactness, low cost and strong bonding force

Active Publication Date: 2021-02-09
CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD +1
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  • Description
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  • Application Information

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Problems solved by technology

However, the existing preparation methods are not only time-consuming and labor-intensive, but the production cost is also extremely high, and the bonding force is poor in a cyclic thermal shock environment, and it is prone to block, peeling and peeling phenomena, which cannot meet the functional requirements of the coating.

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  • Preparation method and application of alpha-Al2O3 film

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Embodiment Construction

[0019] The traditional preparation process of diffusion-resistant coating is to prepare a dense ceramic layer by reactive magnetron sputtering. This method is time-consuming and labor-intensive, and the bonding force is poor in a cyclic thermal shock environment, and it is prone to block dropping and peeling. High-temperature protective coatings, including multi-arc MCrAlYSi coatings (M is Ni, Co, etc.) and aluminized coatings have good oxidation resistance, and can react to form aluminum oxide films under high-temperature oxidation conditions. Compared with alumina formed by injection, it has the advantages of low preparation cost and good bonding force. If a dense aluminum oxide film is formed on the surface by controlling a reasonable preparation process and pre-oxidation process, that is, an in-situ growth resistance diffusion layer, it can not only be used as a barrier diffusion layer, but also due to the in-situ formation mechanism of the oxide film, its The bonding for...

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Abstract

The invention discloses a preparation method and application of an alpha-Al2O3 film. The preparation method comprises the steps that 1, an MCrAlYSi film layer is prepared, where M represents a metal element; and 2, the MCrAlYSi film layer is oxidized in a low-vacuum degree and high-temperature environment so as to generate the alpha-Al2O3 film on the MCrAlYSi film layer. The preparation method ofthe alpha-Al2O3 film is low in cost and high in efficiency, the alpha-Al2O3 film generated on the surface of the MCrAlYSi film layer in situ is good in compactness and high in binding force, the thermal shock performance requirement is met, the appearance of a coating is not changed, and the phenomena of wrinkling, bubbling, cracking, warping, falling and the like are avoided.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, in particular to an α-Al 2 o 3 Preparation methods and applications of thin films. Background technique [0002] In order to reduce the infrared emissivity of each component in the aero-engine, one of the treatment methods currently used is to prepare a certain thickness of coating on the surface of the engine component, one of which is a coating structure of Pt (platinum) layer + MCrAlYSi film layer, MCrAlYSi film The Pt (platinum) layer is located outside the MCrAlYSi thin film layer, but due to the interdiffusion between Pt and the base material at high temperature, which affects the function of the Pt (platinum) layer, it must be placed on the Pt (platinum) layer. A diffusion-resistant coating, such as a dense ceramic layer, is prepared between the MCrAlYSi film layers. The traditional preparation process of the diffusion-resistant coating is through reactive magnetron sputtering ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/14C23C14/32C23C14/58
CPCC23C14/14C23C14/325C23C14/5853
Inventor 唐靖宫声凯郭洪波肖清云魏亮亮
Owner CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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