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Ceramic tile for combustion chambers lining, in particular of gas turbines, and manufacturing method thereof

A technology of gas turbines and manufacturing methods, applied in the field of ceramic tiles, can solve the problems of reducing protective materials, limited repeatability of slurry methods, reducing coating resistance to thermal cycles, etc., to achieve reduced porosity, high uniformity, viscosity strong effect

Active Publication Date: 2014-05-07
ANSALDO ENERGIA SPA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The limitations of known coatings are manifested by their high porosity (typically around 30%) which, especially in the presence of aggressive chemicals and water vapor in the combustion gases, reduces their protection of the underlying material capacity
[0008] A second limitation of known coatings is an excessively large difference in the coefficient of thermal expansion between the coating material and the base material from which the brick is made, which reduces the coating's resistance to thermal cycling, prompting its peeling
[0009] A third limitation lies in the limited reproducibility of the slurry method

Method used

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  • Ceramic tile for combustion chambers lining, in particular of gas turbines, and manufacturing method thereof

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Embodiment Construction

[0022] In the drawings, reference numeral 1 denotes a ceramic tile used for combustor lining, especially for combustor lining of a gas turbine; brick 1 includes a base 2 made of ceramic material, and a coating applied to at least one side 4 of the base 2 3. At least one face 4 of the base body 2 is intended to face the combustion chamber in which the brick 1 is installed.

[0023] The base body 2 is made of a ceramic material, such as alumina or preferably an alumina-mullite two-phase system.

[0024] The matrix 2 is formed by pressing required powder, such as alumina powder (corundum) or a mixture of mullite and alumina powder (corundum), in a mold.

[0025] Then, the ceramic material of the base body 2 is sintered in a furnace to obtain prescribed physical and mechanical properties.

[0026] The coating 3 is a multilayer ceramic coating including at least one first layer 5 and at least one second layer 6, the at least one first layer 5 being arranged in contact with the surface 4 of...

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Abstract

A ceramic tile (1) for combustion chambers lining, in particular of gas turbines, comprises a base body (2) made of ceramic material, for example in alumina or in alumina-mullite, and a coating (3) applied to at least one face (4) of the base body (2). The coating (3) is a multilayer ceramic coating, comprising at least one outer layer (6) made of alumina or ceramic material comprising alumina, and at least one intermediate layer (5), arranged between the outer layer (6) and the base body (2) and made of ceramic material comprising mullite and preferably in mullite or in alumina-mullite.

Description

Technical field [0001] The present invention relates to ceramic tiles used in combustor linings, especially combustor linings of gas turbines, and a manufacturing method thereof. Background technique [0002] As is known, since the inner walls of gas turbine combustion chambers used for power production are exposed to hot gases at high temperatures that are sometimes also highly corrosive, they require effective thermal protection. [0003] For this purpose, ceramic tiles applied to structural walls of, for example, combustion chambers are used. Generally, since ceramic materials provide good thermal protection and have low conductivity, ceramic materials are potentially suitable for this application. [0004] However, the internal environment of the combustion chamber of a gas turbine is extremely corrosive and subject ceramic tiles to high levels of stress (not only thermal stress but also corrosive stress and mechanical stress), so not all ceramic materials are suitable for this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/00F23M5/00
CPCF23M5/00F23R3/007F23M2900/05004F23R2900/00018C04B41/52C04B41/009C04B41/89C04B35/00C04B35/10C04B35/185C04B41/4527C04B41/5038C04B41/5031
Inventor 菲利波·佩罗朱塞佩·卡洛·瓜尔科阿蒂利奥·瓦卡雷扎
Owner ANSALDO ENERGIA SPA
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