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TiSi2 doped Gd2Zr2O7 ceramic material, preparation method and thermal barrier coating

A ceramic material and thermal barrier coating technology, which is applied in the coating process and coating of metal materials, can solve the problems of low thermal expansion coefficient, poor chemical stability, and poor thermal shock resistance, and achieve low thermal conductivity and high temperature phase Good stability, good high temperature anti-sintering effect

Inactive Publication Date: 2022-04-19
江苏航运职业技术学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still several defects in this system, such as low thermal expansion coefficient and poor fracture toughness, and the TGO layer material Al 2 o 3 The chemical stability is poor, and its thermal shock resistance is relatively poor

Method used

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  • TiSi2 doped Gd2Zr2O7 ceramic material, preparation method and thermal barrier coating
  • TiSi2 doped Gd2Zr2O7 ceramic material, preparation method and thermal barrier coating
  • TiSi2 doped Gd2Zr2O7 ceramic material, preparation method and thermal barrier coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A TiSi 2 Doped with Gd 2 Zr 2 o 7 Ceramic material.

[0040] TiSi 2 Doped with Gd 2 Zr 2 o 7 The preparation method of ceramic material (TiSi 2 The content is 2.5wt%) as follows:

[0041] (1) Add 1mol of Gd 2 o 3 and 2mol of ZrO 2 Heating to 500°C and holding for 5 hours for drying;

[0042] (2) Mix and dry 1molGd after wet high-energy ball milling 2 o 3 , 2molZrO 2 , 0.16mol of TiSi 2 , ball milling 10h;

[0043] (3) Take out the mixed powder, heat it in a drying oven at 120°C for 10 hours, and dry it, and pass through a 300-mesh standard sampling sieve;

[0044] (4) Put the sieved powder into a crucible, place it in a high-temperature furnace, keep it warm at 1600° C. for 12 hours, and then cool it with the furnace to prepare the above thermal barrier coating ceramic material.

[0045] Put the ceramic material prepared above into a mold, put the mold into a press and press it into a tablet under a pressure of 250MPa, which is convenient for subsequen...

Embodiment 2

[0048] A TiSi 2 Doped with Gd 2 Zr 2 o 7 Ceramic material.

[0049] TiSi 2 Doped with Gd 2 Zr 2 o 7 Preparation method of thermal barrier coating ceramic material (TiSi 2 The content is 5wt%):

[0050] (1) Add 1mol of Gd 2 o 3 and 2mol of ZrO 2 Heating to 500°C and holding for 5 hours for drying;

[0051] (2) Mix and dry 1molGd after wet high-energy ball milling 2 o 3 , 2molZrO 2 , 0.31mol of TiSi 2 , ball milling 10h;

[0052] (3) Take out the mixed powder, heat it in a drying oven at 120°C for 10 hours, and dry it, and pass through a 300-mesh standard sampling sieve;

[0053] (4) Put the sieved powder into a crucible, place it in a high-temperature furnace, keep it warm at 1600° C. for 12 hours, and then cool it with the furnace to prepare the above thermal barrier coating ceramic material.

[0054] Put the ceramic material prepared above into a mold, put the mold into a press and press it into a tablet under a pressure of 250MPa, which is convenient for su...

Embodiment 3

[0057] A TiSi 2 Doped with Gd 2 Zr 2 o 7 Ceramic materials for thermal barrier coatings.

[0058] TiSi 2 Doped with Gd 2 Zr 2 o 7 The preparation method of ceramic material (TiSi 2 The content is 7.5wt%) as follows:

[0059] (1) Add 1mol of Gd 2 o 3 and 2mol of ZrO 2 Heat to 500°C, keep warm for 5h for drying;

[0060] (2) Mix and dry 1molGd after wet high-energy ball milling 2 o 3 , 2molZrO 2 , 0.47mol of TiSi 2 , ball milling 10h;

[0061] (3) Take out the mixed powder, heat it in a drying oven at 120°C for 10 hours, and dry it, and pass through a 300-mesh standard sampling sieve;

[0062] (4) Put the sieved powder into a crucible, place it in a high-temperature furnace, keep it warm at 1600°C for 12 hours, and then cool down with the furnace to prepare the above ceramic material.

[0063] Put the ceramic material prepared above into a mold, put the mold into a press and press it into a tablet under a pressure of 250MPa, which is convenient for subsequent t...

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Abstract

The invention discloses a TiSi2-doped Gd2Zr2O7 ceramic material, a preparation method and a thermal barrier coating, and the design idea is that the Gd2Zr2O7 thermal barrier coating ceramic material is doped by using the TiSi2 material with excellent fracture toughness, and the order degree of the original internal crystal structure is changed, so that the toughening effect is achieved; and meanwhile, related thermal physical properties such as thermal expansion coefficient and thermal conductivity can be improved, so that related problems existing in the original Gd2Zr2O7 material are solved. Compared with the prior art, the Gd2Zr2O7 thermal barrier coating ceramic material and the preparation method thereof have the following remarkable advantages that the Gd2Zr2O7 thermal barrier coating ceramic material doped with different contents of TiSi2 can still keep good high-temperature phase stability and relatively good sintering resistance at 1500 DEG C; the high-temperature-resistant thermal barrier coating ceramic layer material has higher thermal expansion coefficient, lower thermal conductivity and better fracture toughness at high temperature, and is suitable for being used as a high-temperature-resistant thermal barrier coating ceramic layer material.

Description

technical field [0001] The present invention relates to high-temperature heat-insulating protective materials, in particular to a kind of TiSi 2 Doped with Gd 2 Zr 2 o 7 Ceramic materials, preparation methods and thermal barrier coatings. Background technique [0002] Today, the development trend of aerospace engines and gas turbines is mainly to increase the flow ratio and thrust-to-weight ratio of the engine, improve the thermal efficiency of engine components in harsh environments, reduce fuel consumption, and increase the working life of hot-end components. In order to meet the requirements of improving efficiency and saving energy, the operating temperature of the hot-end parts of the engine, especially the combustion chamber, is constantly increasing, and its operating temperature is almost rising at a rate of 15°C per year, and the gas pressure ratio has increased by nearly 3 times. , the gas temperature has exceeded 1650°C, and the existing high-temperature alloy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/626C23C24/00
CPCC04B35/50C04B35/62675C23C24/00C04B2235/3244C04B2235/3891C04B2235/602C04B2235/96C04B2235/9607
Inventor 姜伯晨王建涛曹将栋代云龙洪晓辰韩天天张彤李秋仪
Owner 江苏航运职业技术学院
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