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

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 ...

Examples

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...

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 ...

Examples

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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