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A preparation method of graphene-modified temperature-indicating thermal barrier coating

A graphene modification, graphene technology, applied in the direction of coating, chemical instruments and methods, metal material coating technology, etc., to achieve the effect of high sensitivity response

Active Publication Date: 2020-03-17
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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  • A preparation method of graphene-modified temperature-indicating thermal barrier coating
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  • A preparation method of graphene-modified temperature-indicating thermal barrier coating

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Experimental program
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Embodiment 1

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

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

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

[0043] Step 4: Mix the two solutions obtained in Step 2 and Step 3. Under vacuum conditions, the temperature is kept at 350°C, and the high-speed mixer is uniformly stirred for 30 minutes at a rate of 500 r...

Embodiment 2

[0053] On the basis of the above embodiments, the present embodiment provides a method for preparing a graphene-modified temperature-indicating thermal barrier coating, including step 1: weighing 4800 g of zirconium oxide octahydrate (ZrOCl 2 ·8H 2 O) Dissolve in 10,000ml of 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, stirred at a rate of 500rpm / min for 50min and mixed.

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

[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 high-speed mixer is at ...

Embodiment 3

[0062] On the basis of the above embodiments, the present embodiment provides a method for preparing a graphene-modified temperature-indicating thermal barrier coating, including step 1: weighing 1200 g of zirconium oxide octahydrate (ZrOCl 2 ·8H 2 O) Dissolve in 2500ml of 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 0.5 g of neodymium oxide (Nd 2 O 3 ) solid powder, dissolved in 500ml of dilute hydrochloric acid with a concentration of 1 mol / L, stirred at a rate of 500rpm / min for 30min and mixed.

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

[0065] Step 4: Mix the two solutions obtained in Step 2 and Step 3. Under vacuum conditions, the temperature is kept at 350°C, and the high-speed mixer is un...

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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 a preparation process of a graphene-modified rare earth fluorescent particle composite yttria-stabilized zirconia precursor solution, a design of a graphene-modified temperature-indicating thermal barrier coating, and a coating preparation process by liquid material plasma spraying, in particular to The present invention is a preparation method of a graphene modified temperature-indicating thermal barrier coating. Background technique [0002] Currently, thermal barrier coating systems that have been widely used on aero-engines consist of alloy substrates, MCrAlY or Pt-modified aluminide bond layers, thermally grown oxides (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 i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/02C23C4/073C23C4/10C09K11/78
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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