Thermal protective coating preparation device and method for hot end member
A technology for preparing devices and hot-end components, which is applied in the field of preparation of thermal protective coatings, can solve the problems of difficult to handle large parts, low coating deposition efficiency, thick thermal protective coatings, etc., and achieve the reduction of physical vapor deposition , high coating damage tolerance and high reactivity
Inactive Publication Date: 2018-11-02
AECC COMML AIRCRAFT ENGINE CO LTD
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Problems solved by technology
However, the atmospheric plasma spraying method has the following disadvantages: for parts with complex shapes, it is difficult to realize the process; the coating has a layered structure, and the coating and the base alloy are mainly mechanically bonded, and the coating contains a large amount of slag and inclusions. These defects can easily lead to oxidation, vulcanization, pitting and salt corrosion of the coating at high temperatures, thereby further reducing the bonding strength between the coating and the base alloy, and causing the coating to peel off or even fail.
The main disadvantages of the electron beam physical vapor deposition method are: for parts with complex structures, there is a shadow effect, and it is difficult to ensure the uniformity of the coating quality; the coating is a columnar structure, the thermal conductivity is relatively high, and the heat insulation effect is poor; limited Due to the limitation of preheating, it is difficult to handle larger parts
In addition, because electron beam physical vapor deposition equipment is expensive and the coating deposition efficiency is low, it is not suitable for preparing thick thermal protective coatings. Therefore, it is mainly used in hot end parts that require high thermomechanical fatigue properties of coatings, such as Turbine turbine blades, etc.
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[0038] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0039] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.
[0040] As indicated in this application and claims, the terms "a", "an", "an" and / or "the" do not refer to the singular and may include the plural unless the context clearly indicates an exception. Generally speaking, the terms "comprising" and "comprising" only suggest the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also contain other st...
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Abstract
The invention provides a thermal protective coating preparation device and method for a hot end member. A thermal protective coating is formed by depositing a precursor fiber on the surface of a substrate. The thermal protective coating prepared by using the device and the method has the characteristics of good thermal protection performance, long service life, and the like; and the implementationcost is low.
Description
technical field [0001] The invention mainly relates to the field of coating preparation, in particular to the preparation of a heat protection coating for a hot end component. Background technique [0002] With the increase of the temperature in front of the turbine, the service temperature of the hot-end components (such as turbine blades, combustion chamber and outer liners, etc.) Ceramic coating to reduce the surface temperature of the part base, improve engine life and reliability, and reduce the amount of cooling gas, thereby reducing fuel consumption. [0003] At present, among the many methods for preparing thermal protection coatings for hot end components, atmospheric plasma spraying (AirPlasma Spray, APS) and electron beam physical vapor deposition (Electron Beam Physical VaporDeposition, EB-PVD) are the most common. [0004] The basic process of the atmospheric plasma spraying method is to spray the raw material directly onto the metal surface through the plasma ...
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IPC IPC(8): C23C28/00C23C26/00
CPCC23C26/00C23C28/321C23C28/3215C23C28/3455
Inventor 高栋郭云珊
Owner AECC COMML AIRCRAFT ENGINE CO LTD