Method for generating A2B2O7 type thermal barrier coating material by laser-induced high-temperature solid-phase reaction

An A2B2O7, high-temperature solid-phase reaction technology, applied in heating inorganic powder coating and other directions, can solve the problems of high raw material requirements, high equipment energy consumption requirements, low safety performance, etc., to avoid high reaction temperature and high raw material requirements. , to avoid the effect of high equipment requirements

Active Publication Date: 2019-06-07
广东朗研科技有限公司 +2
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Solid phase synthesis of A 2 B 2 o 7 Type ceramic materials have high reaction temperature, long reaction time at high temperature, and great requirements on equipment energy consumption; the sol method has a cumbersome process, high raw material requirements and will produce organic pollution; hydrothermal method has high equipment requirements, high technical difficulty, and low safety performance, etc.
Due to the above problems, A 2 B 2 o 7 The preparation of type thermal barrier coating materials is greatly restricted, and it is still not solved in the prior art

Method used

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  • Method for generating A2B2O7 type thermal barrier coating material by laser-induced high-temperature solid-phase reaction
  • Method for generating A2B2O7 type thermal barrier coating material by laser-induced high-temperature solid-phase reaction
  • Method for generating A2B2O7 type thermal barrier coating material by laser-induced high-temperature solid-phase reaction

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as Figure 1-3 As shown, a laser-induced high-temperature solid-state reaction to generate Yb 2 Zr 2 o 7 A method for a type thermal barrier coating material, comprising the steps of:

[0041] (1), get the Yb that purity is 99.9% 2 o 3 and ZrO with a purity of 99.9% 2 , whose molar ratio Yb 2 o 3 : ZrO 2 1:2, ball milled for 2 hours under the condition of ball-to-material ratio of 5:1 and rotating speed of 300r / s to obtain mixed powder;

[0042] (II), the mixed powder of step (I) is evenly distributed on the surface of the substrate, the substrate is a copper metal plate, the mixed powder is evenly distributed, the surface is smooth, and the thickness of the mixed powder is 0.5mm;

[0043] (III), irradiating the laser light on the surface of the substrate in step (II), under the action of continuous laser light with a wavelength of 980nm, the optical power density of the control laser light is 500W / cm 2 , the duration of the laser action is 5s, and the hi...

Embodiment 2

[0045] Such as Figure 1-3 As shown, a laser-induced high-temperature solid-state reaction to generate Yb 2 Zr 2 o 7 -Y 2 Zr 2 o 7A method for a type composite thermal barrier coating material, comprising the steps of:

[0046] (1), get the Yb that purity is 99.9% 2 o 3 , Y with a purity of 99.9% 2 o 3 and ZrO with a purity of 99.9% 2 , whose molar ratio Yb 2 o 3 : Y 2 o 3 : ZrO 2 0.5:0.5:2, ball milling for 2 hours at a ball-to-material ratio of 5:1 and a rotational speed of 300r / s to obtain a mixed powder;

[0047] (II), the mixed powder of step (I) is evenly distributed on the surface of the substrate, the substrate is a copper metal plate, the mixed powder is evenly distributed, the surface is smooth, and the thickness of the mixed powder is 0.5mm;

[0048] (III), irradiating the laser light on the surface of the substrate in step (II), under the action of continuous laser light with a wavelength of 980nm, the optical power density of the control laser ligh...

Embodiment 3

[0050] Such as Figure 1-3 As shown, a laser-induced high-temperature solid-state reaction to generate Gd 2 Zr 2 o 7 A method for a type thermal barrier coating material, comprising the steps of:

[0051] (1), get the Gd that purity is 99.9% 2 o 3 and ZrO with a purity of 99.9% 2 , whose molar ratio Gd 2 o 3 : ZrO 2 1:2, ball milling for 2 hours at a ball-to-material ratio of 5:1 and a rotational speed of 300r / s to obtain a mixed powder;

[0052] (II), the mixed powder of step (I) is evenly distributed on the surface of the substrate, the substrate is a copper metal plate, the mixed powder is evenly distributed, the surface is smooth, and the thickness of the mixed powder is 0.5mm;

[0053] (III), laser irradiation on the surface of the substrate of step (II), under the action of continuous laser light with a wavelength of 980nm, the optical power density of the control laser is 400W / cm 2 , the laser scans the surface of the matrix in a "bow" shape at a scanning spee...

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Abstract

The invention relates to the technical field of thermal barrier coating materials, and particularly relates to a method for generating an A2B2O7 type thermal barrier coating material by a laser-induced high-temperature solid-phase reaction. The method comprises the following steps: (I) uniformly mixing an oxide AOx with an oxide BOy to obtain mixed powder; (II) uniformly distributing the mixed powder obtained in the step (I) to the surface of a substrate; and (III) irradiating the surface of the substrate obtained in the step (II) by laser, inducing the mixed powder to carry out a high-temperature solid-phase reaction under the action of the laser to obtain A2B2O7, and growing the A2B2O7 on the surface of the substrate to generate the A2B2O7 type thermal barrier coating material, wherein the element A is a rare earth element, the element B is at least one selected from Ti, Zr and Hf, x is greater than or equal to 0.5 and less than or equal to 2, and y is equal to 2. The preparation method is simple to operate and convenient to control, production efficiency is high, production cost is low, pollution is small, the production period is short, and the method can be used for large-scale production.

Description

technical field [0001] The invention relates to the technical field of thermal barrier coating materials, in particular to a laser-induced high-temperature solid-phase reaction to generate A 2 B 2 o 7 Type thermal barrier coating material method. Background technique [0002] Thermal barrier coatings have been widely used in the field of aero-engines because they can effectively protect key hot-end components such as aero-engine blades. Thermal barrier coating materials are required to have the characteristics of high melting point, low thermal conductivity, relatively high thermal expansion coefficient, high temperature phase stability, and low sintering shrinkage. The ceramic material used in active thermal barrier coatings is yttria partially stabilized zirconia (Y 2 o 3 stablized partiallyzirconia, referred to as YSZ), due to its own phase transition and serious high-temperature sintering, it is difficult to meet the needs of further development of thermal barrier c...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/50C04B35/48C23C24/08
Inventor 曾和平贺嘉杨
Owner 广东朗研科技有限公司
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