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High-entropy ceramic material resistant to CMAS corrosion and preparation method and application thereof

A ceramic material and high-entropy technology, applied in the field of application, thermal barrier coating material and its preparation, can solve problems such as cracking and delamination, and achieve the effects of strong corrosion resistance to CMAS, simple and fast process, and strong practicability

Active Publication Date: 2021-02-09
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] In order to overcome the problems in the prior art, the present invention provides a high-entropy oxide ceramic material resistant to CMAS corrosion and its preparation method, through high-entropy technology, introducing no less than 5 kinds of rare earth metal elements into the oxide at the same time can effectively solve the problem of cracking and delamination of materials under CMAS corrosion, thereby completing the present invention

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  • High-entropy ceramic material resistant to CMAS corrosion and preparation method and application thereof
  • High-entropy ceramic material resistant to CMAS corrosion and preparation method and application thereof
  • High-entropy ceramic material resistant to CMAS corrosion and preparation method and application thereof

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preparation example Construction

[0024] According to a second aspect of the present invention, a method for preparing a high-entropy ceramic material resistant to CMAS corrosion is provided, which is used to prepare the high-entropy ceramic material resistant to CMAS corrosion described in the first aspect, comprising the following steps:

[0025] Step 1, choose at least three kinds of samarium oxide, europium oxide, erbium oxide, and lutetium oxide, and mix them with yttrium oxide and ytterbium oxide, such as mixing in a ball mill tank, to obtain a uniformly mixed slurry;

[0026] In step 2, the slurry obtained in step 1 is dried to obtain a mixture powder, and the dried powder is subjected to pressureless calcination, such as in a high-temperature electric furnace, to obtain a high-entropy ceramic powder.

[0027] In a preferred embodiment, in step 1, Y 2 o 3 、Nd 2 o 3 、Sm 2 o 3 、Eu 2 o 3 , Yb 2 o 3 , and Er 2 o 3 It is a powder material, preferably with a particle size not greater than 2 microns...

Embodiment 1

[0036] Will Y 2 o 3 、Eu 2 o 3 , Yb 2 o 3 、Er 2 o 3 and Lu 2 o 3 press Y 2 o 3 :Eu 2 o 3 :Yb 2 o 3 :Er 2 o 3 :Lu 2 o 3 =1:1:1:1:1 molar ratio weighs, mixes in ball mill tank, mixing time is 6 hours, and medium is dehydrated alcohol, obtains slurry; The slurry obtained is filtered and dried to obtain The mixture is powdered, and the dried powder is put into a high-temperature furnace for calcination, the calcination temperature is 1600° C., and the calcination time is 2 hours to obtain a high-entropy ceramic powder. The obtained anti-CMAS corrosion high-entropy ceramic powder material has a purity of 100wt%, and the composition of the obtained high-entropy ceramic powder material is as follows: figure 1 As shown in the X-ray diffraction pattern of the high-entropy ceramic powder, the morphology is as follows figure 2 The scanning electron micrograph is shown.

[0037] Put the high-entropy ceramic powder into a discharge plasma sintering furnace for high-tem...

Embodiment 2

[0039] Will Y 2 o 3 、Lu 2 o 3 , Yb 2 o 3 、Er 2 o 3 and Sm 2 o 3 press Y 2 o 3 :Lu 2 o 3 :Yb 2 o 3 :Er 2 o 3 :Sm 2 o 3 =1:1:1:1:1 molar ratio weighs, mixes in ball mill tank, mixing time is 6 hours, and medium is dehydrated alcohol, obtains slurry; The slurry obtained is filtered and dried to obtain The mixture is powdered, and the dried powder is put into a high-temperature furnace for calcination, the calcination temperature is 1550° C., and the calcination time is 2 hours to obtain a high-entropy ceramic powder. The purity of the obtained anti-CMAS corrosion high-entropy ceramic powder material is 100wt%, and the obtained high-entropy ceramic composition is as Figure 4 As shown in the X-ray diffraction pattern of the high-entropy ceramic powder, the morphology is as follows Figure 5 The scanning electron micrograph is shown.

[0040] Put the high-entropy ceramic powder into a discharge plasma sintering furnace for high-temperature sintering, the atmosp...

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Abstract

The invention provides a high-entropy ceramic material resistant to CMAS corrosion, a preparation method and an application thereof, the high-entropy ceramic material comprises the following raw materials: at least three of samarium oxide, europium oxide, erbium oxide and lutetium oxide, yttrium oxide and ytterbium oxide, and the amounts of substances of the raw materials are the same. The preparation method comprises the following steps: optionally selecting at least three of samarium oxide, europium oxide, erbium oxide and lutetium oxide, and conducting mixing with yttrium oxide and ytterbium oxide to obtain uniformly mixed slurry; and drying the slurry to obtain mixture powder, and carrying out pressureless calcination on the dried powder to obtain the high-entropy ceramic powder material. Analysis shows that the high-entropy ceramic powder material has the characteristics of high purity and strong CMAS corrosion resistance, the preparation method is simple and suitable for industrial production, and the high-entropy ceramic powder material has excellent application prospect in the field of thermal barrier coating materials.

Description

technical field [0001] The invention relates to a high-entropy oxide ceramic material resistant to CMAS corrosion and a preparation method thereof, in particular to a high-purity high-entropy oxide ceramic resistant to CMAS corrosion and a preparation method thereof, belonging to thermal barrier coating materials and their preparation , Application fields. Background technique [0002] Thermal barrier coatings (Thermal Barrier Coatings, TBCs) are one of the key technologies for advanced aero-engine hot-end components, mainly to insulate heat, reduce the thermal mismatch between the coating and the alloy matrix, and effectively resist particle impact to protect the aero-engine The role of components in high temperature areas requires that they have good thermodynamic properties. The widely used thermal barrier coating material is mainly yttria partially stabilized zirconia (YSZ). However, during service, the thermal barrier coating of aero-engine turbine blades not only has...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/626
CPCC04B35/50C04B35/62675C04B35/62615C04B2235/3225C04B2235/9669
Inventor 向会敏孙亚男周延春戴付志陈海坤
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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