Preparation method of graphene modified temperature-indicating thermal barrier coating

A graphene modification, graphene technology, applied in coatings, chemical instruments and methods, metal material coating processes, etc., to achieve the effect of highly sensitive response

Active Publication Date: 2017-11-28
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In China, the use of rare earth fluorescence intensity to evaluate the health status of thermal barrier coatings in high temperature service is still in its infancy

Method used

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  • Preparation method of graphene modified temperature-indicating thermal barrier coating
  • Preparation method of graphene modified temperature-indicating thermal barrier coating
  • Preparation method of graphene modified temperature-indicating thermal barrier coating

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The invention provides a method for preparing a graphene-modified temperature-indicating thermal barrier coating, comprising step 1: weighing 2400g of zirconia octahydrate (ZrOCl 2 ·8H 2 O) Dissolve in 5000ml deionized water and stir to mix.

[0041] Step 2: Weigh 80g of yttrium oxide (Y 2 o 3 ), 2g europium oxide (Eu 2 o 3 ) and 1g neodymium oxide (Nd 2 o 3 ) solid powder, dissolved in 1000ml of dilute hydrochloric acid with a concentration of 1 mol / L, at a rate of 500rpm / min, stirred evenly for 30min and then mixed.

[0042] Step 3: Weigh 2 g of graphene oxide and disperse it in 500 ml of absolute ethanol with ultrasonic vibration to prepare a graphene oxide dispersion. The ultrasonic dispersion time is 120min, and the ultrasonic frequency is 15Hz.

[0043] Step 4: Mix the two solutions obtained in Step 2 and Step 3. Under vacuum conditions, keep the temperature at 350° C., and stir evenly for 30 minutes with a high-speed mixer at a speed of 500 rpm / min.

[0...

Embodiment 2

[0053] On the basis of the above examples, this example provides a method for preparing a graphene-modified temperature-indicating thermal barrier coating, including step 1: weighing 4800g of zirconia octahydrate (ZrOCl 2 ·8H 2 O) Dissolve in 10000ml deionized water and stir to mix.

[0054] Step 2: Weigh 160g of yttrium oxide (Y 2 o 3 ), 4g europium oxide (Eu 2 o 3 ) and 2g neodymium oxide (Nd 2 o 3 ) solid powder, dissolved in 2000ml of dilute hydrochloric acid with a concentration of 1 mol / L, at a rate of 500rpm / min, stirring evenly for 50min for mixing.

[0055] Step 3: Weigh 4 g of graphene oxide and disperse it in 1000 ml of absolute ethanol with ultrasonic vibration to prepare graphene oxide dispersion. The ultrasonic dispersion time is 150min, and the ultrasonic frequency is 15Hz.

[0056] Step 4: Mix the two solutions obtained in Step 2 and Step 3. Under vacuum conditions, the temperature is kept at 360° C., and the speed of a high-speed mixer is 500 rpm / min, ...

Embodiment 3

[0062] On the basis of the above examples, this example provides a method for preparing a graphene-modified temperature-indicating thermal barrier coating, including step 1: weighing 1200g of zirconia octahydrate (ZrOCl 2 ·8H 2 O) Dissolve in 2500ml deionized water and stir to mix.

[0063] Step 2: Weigh 40g of yttrium oxide (Y 2 o 3 ), 1g europium oxide (Eu 2 o 3 ) and 0.5g neodymium oxide (Nd 2 o 3 ) solid powder, dissolved in 500ml of dilute hydrochloric acid with a concentration of 1 mol / L, at a rate of 500rpm / min, stirring evenly for 30min for mixing.

[0064] Step 3: Weigh 2 g of graphene oxide and disperse it in 500 ml of absolute ethanol with ultrasonic vibration to prepare a graphene oxide dispersion. The ultrasonic dispersion time is 120min, and the ultrasonic frequency is 15Hz.

[0065] Step 4: Mix the two solutions obtained in Step 2 and Step 3. Under vacuum conditions, keep the temperature at 350° C., and stir evenly for 30 minutes with a high-speed mixer ...

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Abstract

The invention provides a preparation method of a graphene modified temperature-indicating thermal barrier coating. The preparation method comprises steps as follows: S1, zirconium oxychloride octahydrate is dissolved in deionized water; S2, solid powder of yttrium oxide, europium oxide and neodymium oxide is dissolved in diluted hydrochloric acid; S3, graphene oxide is dispersed in absolute ethanol; S4, the two solutions obtained in S2 and S3 are mixed; S5, the mixed solution in S1 and the solution obtained in S4 are stirred and mixed with a polyethylene glycol dispersant; S6, an ammonium hydroxide reaction base solution with PH being 10 is prepared and heated, and yttria-stabilized zirconia precursor sol is obtained; S7, graphene modified Nd<3+> / Eu<3+> yttria-stabilized zirconia sol containing no Cl- is obtained; S8, the graphene modified temperature-indicating thermal barrier coating is obtained through liquid-phase plasma spraying. The problems of burning loss, blowing loss and agglomeration of nano-scale graphene in preparation of a coating with the hot spraying technique are avoided.

Description

technical field [0001] The invention belongs to the technical field of preparation technology of graphene-modified rare-earth fluorescent particle composite yttria-stabilized zirconia precursor solution, design of graphene-modified temperature-indicating thermal barrier coating and technology of preparing coating by liquid material plasma spraying, and particularly relates to It is a preparation method of a graphene-modified temperature-indicating thermal barrier coating. Background technique [0002] At present, the thermal barrier coating system widely used on aircraft engines consists of alloy substrate, MCrAlY or Pt modified aluminide bonding layer, thermally grown oxide (TGO) and yttria stabilized zirconia (YSZ) thermal barrier ceramics. The layer consists of four parts. Thermal barrier coating life prediction relies heavily on temperature measurements of the application environment. First, the surface temperature Ts of the thermal barrier coating is much higher than ...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/02C23C4/10C23C4/073C09K11/78
CPCC09K11/7787C23C4/02C23C4/073C23C4/10C23C4/134
Inventor 田浩亮张欢欢王长亮郭孟秋汤智慧崔永静高俊国周子民
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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