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An in-situ generation of sic-doped gd 2 zr 2 o 7 Thermal barrier coating ceramic material and preparation method thereof

A thermal barrier coating, ceramic material technology, applied in sustainable transportation, climate sustainability, air transportation, etc., to achieve high thermal expansion coefficient, good high temperature phase stability, good fracture toughness effect

Active Publication Date: 2022-07-12
江苏航运职业技术学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But domestic and foreign related to A 2 B 2 o 7 , especially Gd 2 Zr 2 o 7 There is still a gap in the research of two-phase, three-phase or even more phase element doping of this structural material

Method used

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  • An in-situ generation of sic-doped gd <sub>2</sub> zr <sub>2</sub> o <sub>7</sub> Thermal barrier coating ceramic material and preparation method thereof
  • An in-situ generation of sic-doped gd <sub>2</sub> zr <sub>2</sub> o <sub>7</sub> Thermal barrier coating ceramic material and preparation method thereof
  • An in-situ generation of sic-doped gd <sub>2</sub> zr <sub>2</sub> o <sub>7</sub> Thermal barrier coating ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a pure Gd 2 Zr 2 O 7 Thermal barrier coating ceramic material.

[0039] The pure Gd 2 Zr 2 O 7 The preparation method of the thermal barrier coating ceramic material is as follows:

[0040] (1) 0.039 moles of Gd 2 O 3 and 0.078 mol of ZrO 2 Heated to 500°C and kept for 5 hours for drying;

[0041] (2) 0.039 mol of Gd after mixing and drying by wet high-energy ball milling 2 O 3 , 0.078 moles of ZrO 2 , ball milling for 10 hours;

[0042] (3) Take out the mixed powder, keep it in a drying oven at 120°C for 10 hours and dry it, and pass it through a 300-mesh standard sieve;

[0043] (4) put the above-mentioned dry powder into the mould, put the mould into the press (tablet diameter 1.5cm) and press down, the pressure is 250MPa, put the sample into the crucible after the pressing, and place it in a high-temperature furnace at 1500 Heat preservation in ℃ for 12 hours, and then cooling with the furnace to prepare the above-mentioned thermal barrier coating cera...

Embodiment 2

[0046] An in-situ generation of SiC-doped Gd 2 Zr 2 O 7 Thermal barrier coating ceramic material.

[0047] The in-situ generated SiC-doped Gd 2 Zr 2 O 7 Preparation method of thermal barrier coating ceramic material (TiSi 2 and graphite content of 1wt% and 0.34%, respectively):

[0048] (1) 0.024 moles of Gd 2 O 3 and 0.048 mol of ZrO2 heated to 500 ℃, and kept for 5 hours for drying;

[0049] (2) 0.024 mol of Gd after mixing and drying by wet high-energy ball milling 2 O 3 , 0.048 moles of ZrO 2 , and 0.0015 moles of TiSi 2 and 0.004 moles of graphite, ball milled for 10 hours;

[0050] (3) Take out the mixed powder, keep it in a drying oven at 120°C for 10 hours and dry it, and pass it through a 300-mesh standard sieve;

[0051] (4) put the above-mentioned dry powder into the mould, put the mould into the press (tablet diameter 1.5cm) and press down, the pressure is 250MPa, put the sample into the crucible after the pressing, and place it in a high-temperature ...

Embodiment 3

[0054] An in-situ generation of SiC-doped Gd 2 Zr 2 O 7 Thermal barrier coating ceramic material.

[0055] The in-situ generated SiC-doped Gd 2 Zr 2 O 7 Preparation method of thermal barrier coating ceramic material (TiSi 2 and graphite content of 2.5wt% and 0.85wt%, respectively):

[0056] (1) 0.024 moles of Gd 2 O 3 and 0.048 moles of ZrO 2 Heated to 500°C and kept for 5 hours for drying;

[0057] (2) 0.024 mol of Gd after mixing and drying by wet high-energy ball milling 2 O 3 , 0.048 moles of ZrO 2 , and 0.0036 mol of TiSi 2 and 0.01 mol of graphite, ball milled for 10 hours;

[0058] (3) Take out the mixed powder, keep it in a drying oven at 120°C for 10 hours and dry it, and pass it through a 300-mesh standard sieve;

[0059] (4) put the above-mentioned dry powder into the mould, put the mould into the press (tablet diameter 1.5cm) and press down, the pressure is 250MPa, put the sample into the crucible after the pressing, and place it in a high-temperatur...

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Abstract

The invention discloses a SiC-doped Gd2Zr2O7 thermal barrier coating ceramic layer material and a preparation method thereof. The chemical formula of the SiC-doped Gd2Zr2O7 thermal barrier coating ceramic layer material is Gd2Zr2O7-XTiSi2-YC (X=0-5wt%, Y =0-1.7wt%), Gd2Zr2O7-XTiSi2-YC (X=0-5wt%, Y=0-1.7wt%) series thermal barrier coating ceramic layer materials, have the following significant advantages: doping different contents of in-situ After the second phase substance SiC is formed, it can still maintain good high temperature phase stability and good sintering resistance at 1500°C. The thermal expansion coefficient can reach 11W / m.K, the thermal conductivity at 1000°C can reach 0.6‑0.7W m‑1 k‑1, and the fracture toughness can be increased to 1.5‑1.6MPa m1 / 2. Barrier coating ceramic layer material.

Description

technical field [0001] The invention belongs to the field of high temperature heat insulation protection materials, and particularly relates to a thermal barrier coating ceramic material with high temperature resistance, low thermal conductivity, high thermal expansion coefficient and high fracture toughness and a preparation method thereof. Background technique [0002] With the continuous development of modern aviation technology, aero-engines represented by gas turbine engines are developing in the direction of high thrust-to-weight ratio, high thermal efficiency, and high flow ratio. Therefore, the temperature and pressure experienced by the hot-end components inside the engine are also continuously improving. However, the existing superalloy and cooling technology cannot meet the current situation. It is one of the effective ways to use difficult problems, and it has gradually become a research hotspot. [0003] The structure of a typical thermal barrier coating is di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/622C04B35/63
CPCC04B35/50C04B35/622C04B35/6303C04B2235/3244C04B2235/3891C04B2235/425C04B2235/5436C04B2235/602C04B2235/656C04B2235/6567C04B2235/96C04B2235/9607Y02T50/60
Inventor 姜伯晨曹将栋王建涛陈涵麟姚达孙萍黄健王金龙
Owner 江苏航运职业技术学院
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