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Preparation method for graphene-modified visible abrasion-resistant coating

A graphene modification and wear-resistant coating technology, applied in the coating, metal material coating process, melt spraying and other directions, can solve the problem that the test process is not intuitive, the bonding strength of the coating layer is low, and the coating is easy to age and fail. and other problems to achieve the effect of monitoring the integrity of the coating and the safe service status

Active Publication Date: 2017-11-17
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, various signals detected by advanced instruments and equipment are used to indirectly monitor the surface and internal wear conditions of workpieces, such as acoustic emission, ultrasonic vibration and machine vision technologies, but the cost of testing instruments used in these monitoring methods is quite high. Not only does it have high requirements on the external environment, but it is also difficult to operate in real time and the test process is not intuitive enough.
Luminescent coatings can be effectively applied to indicator coatings because of their intuitiveness. In the 1990s, SrAl 2 o 4 : Eu 3+ , Dy 3+ To represent the co-activation of novel rare earth ions, by irradiation with an excitation source, Eu 3+ , Dy 3+ The electrons transition from the ground state to the excited state, absorbing energy during the transition, and releasing energy when the electrons transition from the excited state to the ground state after the excitation is stopped, so that the luminescence is detected. Currently, this material is used in the form of coating in fire protection, construction , military and other fields have been widely used, but the coating layer has the problems of low bonding strength and easy aging and failure of the coating
At present, there are few reports on the application of luminescent coatings in wear monitoring technology.

Method used

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  • Preparation method for graphene-modified visible abrasion-resistant coating
  • Preparation method for graphene-modified visible abrasion-resistant coating
  • Preparation method for graphene-modified visible abrasion-resistant coating

Examples

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Embodiment 1

[0035] On the basis of the foregoing embodiments, a method for preparing a graphene-modified visible wear-resistant coating provided in this embodiment comprises the following steps:

[0036] Step (1) Weigh 20g of strontium carbonate (SrCO 3 ), 10g of alumina (Al 2 o 3 ), weigh 300ml of alcohol, and place the mixed powder and alcohol in a planetary ball mill for ball milling and mixing for 60 minutes until the alcohol is completely volatilized. Then it was transferred to a corundum boat and treated in a high-temperature furnace at a temperature of 900 °C for 4 h.

[0037] Step (2) Weigh 1 g of graphene oxide and disperse it in 100 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.

[0038] Step (3) weigh 2g europium oxide (Eu 2 o 3 ) and 2g dysprosium oxide (Dy 2 o 3 ), add 300ml of dilute hydrochloric acid to dissolve, and add 300ml of distilled water ...

Embodiment 2

[0047] On the basis of the foregoing embodiments, a method for preparing a graphene-modified visible wear-resistant coating provided in this embodiment comprises the following steps:

[0048] Step (1) Weigh 30g of strontium carbonate (SrCO 3 ), 15g of alumina (Al 2 o 3 ), weigh 500ml of alcohol, and place the mixed powder and alcohol in a planetary ball mill for ball milling and mixing for 70 minutes until the alcohol is completely volatilized. Then it was transferred to a corundum boat and treated in a high-temperature furnace at a temperature of 1000 °C for 5 h.

[0049] Step (2) Weigh 2 g of graphene oxide and disperse it in 200 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.

[0050] Step (3) weigh 3g europium oxide (Eu 2 o 3 ) and 1.5g dysprosium oxide (Dy 2 o 3 ), add 500ml of dilute hydrochloric acid to dissolve, and add 500ml of distilled wat...

Embodiment 3

[0056] On the basis of the foregoing embodiments, a method for preparing a graphene-modified visible wear-resistant coating provided in this embodiment comprises the following steps:

[0057] Step (1) Weigh 60g of strontium carbonate (SrCO 3 ), 40g of alumina (Al 2 o 3 ), weigh 600ml of alcohol, and place the mixed powder and alcohol in a planetary ball mill for ball milling and mixing for 80 minutes until the alcohol is completely volatilized. Then it was transferred to a corundum boat and treated in a high-temperature furnace at a temperature of 1000 °C for 6 h.

[0058] Step (2) Weigh 1 g of graphene oxide and disperse it in 100 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.

[0059] Step (3) weigh 3g europium oxide (Eu 2 o 3 ) and 2g dysprosium oxide (Dy 2 o 3 ), add 300ml of dilute hydrochloric acid to dissolve, and add 300ml of distilled water...

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Abstract

The invention provides preparation method for a graphene-modified visible abrasion-resistant coating. The method comprises the steps that firstly, a certain amount of strontium carbonate (SrCO3), aluminum oxide (Al2O3) and a certain amount of ethyl alcohol are weighed and mixed; secondly, a certain amount of graphene oxide is weighed and dispersed in absolute ethyl alcohol to be subjected to ultrasonic concussion; thirdly, europium oxide (Eu2O3) and dysprosium oxide (Dy2O3) are dissolved with diluted hydrochloric acid; fourthly, modification and composition regulation of Dy3+ / Eu3+ are achieved through graphene; fifthly, graphene-modified SrAl2O4:Eu3+, Dy3+ powder with the powder particle size being 1-3 microns is obtained through screening; and sixthly, a graphene codoped Dy3+ / Eu3+ WC-Co powder material with a certain grain is obtained, and the graphene-modified SrAl2O4:Eu3+, Dy3+ codoped WC-Co visible abrasion-resistant coating is prepared through a thermal spraying technology. By adopting the technical scheme, the spray material is even in grain and high in purity, the graphene content in powder is high, and the visual abrasion-resistant coating can be prepared through the thermal spraying technology.

Description

technical field [0001] The invention belongs to the preparation of graphene-modified SrAl by thermal spraying technology 2 o 4 :Eu 3+ , Dy 3+ The technical field of co-doped WC-Co visible wear-resistant coating, especially relates to a preparation method of graphene-modified visible wear-resistant coating. Background technique [0002] The preparation of wear-resistant coatings by thermal spraying is one of the main technologies applied in remanufacturing engineering. It can be used not only to improve the surface wear resistance of new parts, but also to repair the geometric dimensions of failed parts, giving waste parts a new life cycle, It saves energy and material waste caused by manufacturing new products, and has wide application potential in high-tech engineering fields such as aerospace, petrochemical, and nuclear power plants. [0003] So far, the surface coating of remanufactured parts generally has obvious failures only when the coating has large-scale pitting...

Claims

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Application Information

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IPC IPC(8): C23C4/06
CPCC23C4/06
Inventor 田浩亮周子民汤智慧王长亮郭孟秋崔永静高俊国张欢欢
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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