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Preparation method and application of temperature sensitive type Y2SiO5:Eu intelligent thermal barrier coating

A temperature-sensitive, thermal barrier coating technology, applied in coatings, thermometers, metal material coating processes, etc., can solve the problems of inability to evaluate the thermal insulation effect of thermal barrier coatings, inability to non-destructively monitor temperature online, and application problems. , to achieve good anti-CMAS performance, efficient preparation, good combination effect

Active Publication Date: 2016-11-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature of thermal barrier coatings in service is a key factor affecting the life of turbine blades. However, neither the traditional YSZ thermal barrier coatings nor the new low-thermal conductivity thermal barrier coatings that have emerged in recent years can achieve online non-destructive monitoring of temperature, nor can they monitor the temperature of thermal barrier coatings. A more reliable evaluation of the thermal insulation effect of the coating
The traditional method is to estimate by thermal conductivity, but this ignores the effect of gas radiation at high temperature and brings about temperature changes and fluctuations, which brings great trouble to the application
In addition, once the thermal barrier coating fails, the blade will fail quickly when it is directly exposed to the high-temperature gas environment, and the engine will not work normally

Method used

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  • Preparation method and application of temperature sensitive type Y2SiO5:Eu intelligent thermal barrier coating
  • Preparation method and application of temperature sensitive type Y2SiO5:Eu intelligent thermal barrier coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A temperature-sensitive Y 2 SiO 5 : The preparation method of Eu intelligent thermal barrier coating adopts the following steps:

[0031] (1) get nanometer yttrium oxide (Y 2 o 3 ) powder (100nm) and micron silicon dioxide (SiO 2 ) powder (10μm) was mixed according to the molar ratio of 1:10, and then a certain amount of nano europium oxide (Eu 2 o 3 ) powder (100nm), its addition is controlled to be 0.1wt%, while adding 1mol% LiYO 2 Use the powder as a sintering aid; then use isopropanol as the ball milling medium, use a planetary ball mill for 5 hours, control the ball milling speed to 100r / min, and then dry it in an oven at 30°C for 4 hours to obtain a uniform reaction precursor mixture A;

[0032] (2) Put the reaction precursor mixture A into a 1500°C high-temperature furnace for sintering and heat preservation for 1h, control the heating rate and cooling rate to 2°C / min, and use isopropanol as the ball milling medium again to pass the obtained ceramic powder ...

Embodiment 2

[0038] A temperature-sensitive Y 2 SiO 5 : The preparation method of Eu intelligent thermal barrier coating adopts the following steps:

[0039] (1) get nanometer yttrium oxide (Y 2 o 3 ) powder (300nm) and micron silicon dioxide (SiO 2 ) powder (30μm) according to a certain molar ratio mixed 1:1, and then add a certain amount of nano europium oxide (Eu 2 o 3 ) powder (100-300nm), its addition is controlled to be 1.0wt%, while adding 5mol% of LiYO 2 Use the powder as a sintering aid; then use isopropanol as the ball milling medium, use a planetary ball mill for 3 hours, control the ball milling speed to 300r / min, and then dry it in a 40°C oven for 2 hours to obtain a uniform reaction precursor mixture A;

[0040] (2) Put the reaction precursor mixture A into a 1400°C high-temperature furnace for sintering and heat preservation for 2.5 hours, control the heating rate and cooling rate to 5°C / min, and use isopropanol as the ball milling medium again to pass the obtained cer...

Embodiment 3

[0047] A temperature-sensitive Y 2 SiO 5: The preparation method of Eu intelligent thermal barrier coating adopts the following steps:

[0048] (1) get nanometer yttrium oxide (Y 2 o 3 ) powder (200nm) and micron silicon dioxide (SiO 2 ) powder (20μm) was mixed according to a certain molar ratio of 10:1, and then a certain amount of nano europium oxide (Eu 2 o 3 ) powder (100-300nm), the control and control of its addition is 2.0wt%, while adding 8mol% LiYO 2 Use the powder as a sintering aid; then use isopropanol as the ball milling medium, use a planetary ball mill for 5 hours, control the ball milling speed to 400r / min, and then dry it in an oven at 50°C for 1 hour to obtain a uniform reaction precursor mixture A;

[0049] (2) Put the reaction precursor mixture A into a 1200°C high-temperature furnace for sintering and heat preservation for 4 hours, control the heating rate and cooling rate to 8°C / min, and use isopropanol as the ball milling medium again to pass the o...

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Abstract

The invention relates to a preparation method and application of a temperature sensitive type Y2SiO5:Eu intelligent thermal barrier coating. The preparation method comprises the steps that nanometer yttrium oxide powder, micrometer silicon dioxide powder, nanometer europium oxide powder and LiYO2 powder are subjected to ball-milling and high-temperature sintering to obtain ceramic aggregate powder Y2SiO5:Eu powder which is then dispersed into 1-methyl pyrrolidone; polyving alcohol is added to enable the ceramic aggregate powder Y2SiO5:Eu powder to be dispersed completely and then ultrasonic oscillation is conducted; then a mixed binder is added to conduct L-S phase conversion preparation, and obtained coated Y2SiO5:Eu microballons are sprayed on the surface of a high-temperature alloy sample with a metal bonding layer to form a fluorescent layer with the thickness being 3-50 [mu]m; and then a Y2SiO5 coating is sprayed on the surface of the fluorescent layer according to the same spraying process, so that the temperature sensitive type Y2SiO5:Eu intelligent thermal barrier coating is obtained and can be used in coating temperature measurement. The prepared thermal barrier coating has the advantages that the surface is even, no microcrack occurs, the thickness is uniform, no penetrating hole exists, and the bonding force is good. In addition, excellent fluorescent emitting performance and a temperature fluorescent effect are achieved, and the temperature sensitive type Y2SiO5:Eu intelligent thermal barrier coating can be applied to the field of fluorescent temperature measurement of coatings.

Description

technical field [0001] The invention relates to a preparation method and application of a thermal barrier coating, in particular to a temperature-sensitive Y 2 SiO 5 : Preparation method of Eu intelligent thermal barrier coating and its application in temperature measurement. Background technique [0002] Thermal barrier coatings (Thermal barrier coatings, TBCs) are the key materials and technologies for the manufacture of aero-engines and ground gas turbines, and are mainly used in high-pressure turbine blades. , Combustion chamber and other high-temperature end parts, usually the thermal barrier coating system is composed of three-layer structure: (1) the outermost layer is yttria-stabilized zirconia (6-8wt.%YSZ) for heat insulation; the middle layer is The metal bonding layer is generally made of high-temperature oxidation-resistant alloys (MCrAlYX, M=Ni, X=Co, Hf, Si and β-Ni(Pt)Al), whose function is to improve the bond between the yttrium-stabilized zirconia ceramic ...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/073C04B35/16C04B35/622C04B35/626G01K7/02
CPCG01K7/02C23C4/06C04B35/16C04B35/62222C04B35/62605C04B2235/3224C04B2235/3225
Inventor 郝巍赵晓峰彭迪肖平郭芳威王欣张启辉郭松涛吴彬斌
Owner SHANGHAI JIAO TONG UNIV
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