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Multilayer thermal barrier coating and phosphorescence-based surface layer and bottom layer temperature measurement method

A technology of thermal barrier coating and measurement method, which is applied in the direction of coating, fluorescence/phosphorescence, superimposed layer plating, etc., and can solve problems such as inaccurate temperature measurement results, damage, and evaluation of heat insulation effects

Active Publication Date: 2020-07-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-layer thermal barrier coating and its phosphorescence-based surface layer and bottom layer temperature measurement method to solve the problem of temperature measurement results caused by gas absorption interference and contact measurement damage to the structure in traditional temperature testing. Inaccurate and unable to evaluate the effect of heat insulation

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  • Multilayer thermal barrier coating and phosphorescence-based surface layer and bottom layer temperature measurement method
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  • Multilayer thermal barrier coating and phosphorescence-based surface layer and bottom layer temperature measurement method

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Embodiment 1

[0036] figure 1 Structural diagram of multilayer thermal barrier coating provided by the present invention, such as figure 1 As shown, a thermal barrier coating based on phosphorescence includes: a surface temperature-sensitive layer 1, an ordinary heat-insulating layer 2 and a bottom temperature-sensitive layer 3; the heat-insulating layer 2 is arranged on the surface temperature-sensitive layer 1 and the temperature-sensitive layer between the bottom temperature-sensitive layers 3; the surface temperature-sensitive layer 1 is formed by blending a ceramic substrate and a first phosphorescent substance; the bottom temperature-sensitive layer 3 is formed by blending a ceramic substrate and a second phosphorescent substance; The bottom of the bottom temperature-sensitive layer 3 is provided with a metal bonding layer; the two light intensity peaks of the first phosphorescent substance and the second phosphorescent substance do not overlap each other; two different excitation lig...

Embodiment 2

[0049] figure 2 The flow chart of the temperature measurement method for the surface layer and the bottom layer of the phosphorescence-based multilayer thermal barrier coating provided by the present invention, such as figure 2 Shown, a kind of temperature measurement method of the surface layer and the bottom layer based on phosphorescent thermal barrier coating, described measurement method comprises:

[0050] Step 201: Emit the first excitation light and the second excitation light from the air to the surface temperature-sensitive layer and the bottom temperature-sensitive layer; the first excitation light excites the first phosphorescent substance; the second excitation light excites the second phosphorescent substance ; When selecting the two different excitation lights, when using the first excitation light to excite the first phosphorescent substance, the first excitation light does not excite the second phosphorescent substance or the excitation is lower than the exc...

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Abstract

The invention relates to a multilayer thermal barrier coating and a phosphorescence-based surface layer and bottom layer temperature measurement method. The method is based on the principle that the light intensity ratio of phosphorescence emitted by a ceramic-based phosphorescent substance in a characteristic wave band is sensitive to temperature and the permeability of the thermal barrier coating to exciting light and phosphorescence, the surface layer and the bottom layer of the ceramic coating are doped with different phosphorescent substances, the two phosphorescent substances are excitedat the same time, and the phosphorescence emitted by the two phosphorescent substances is collected and analyzed, so that the temperature of the surface layer and the bottom layer of the coating is measured at the same time. According to the method, the damage to the coating structure and result errors caused by environmental gas absorption interference and contact measurement in a traditional thermal barrier coating temperature measurement method are avoided, and the evaluation for a heat insulation effect of the thermal barrier coating is also achieved.

Description

technical field [0001] The invention relates to the field of non-contact solid temperature measurement, in particular to a multilayer thermal barrier coating and a method for measuring the temperature of the surface layer and the bottom layer based on phosphorescence. Background technique [0002] With the continuous development of aerospace technology, the temperature before the turbine of an aero-engine has far exceeded the temperature resistance limit of metal materials. In this case, as a solution, the thermal barrier coating of aero-engines achieves the heat insulation effect by coating high thermal resistance materials on the surface of high-temperature components. The main material of the thermal barrier coating is high-temperature-resistant ceramics. The aluminum-based tie coat is bonded to the metal substrate. [0003] The temperature measurement of the thermal barrier coating of the existing aero-engine mainly has the following two problems: the heat insulation ef...

Claims

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Application Information

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IPC IPC(8): G01K11/00G01N21/64C23C28/00
CPCC23C28/30G01K11/00G01N21/64
Inventor 全永凯徐国强刘臻丽殷秋洋闻洁董苯思
Owner BEIHANG UNIV