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Rare earth oxide doped gadolinium zirconate powder for plasma physical vapor deposition and preparation method thereof

A technology of physical vapor deposition and rare earth oxides, which is applied in the fields of coating, molten spraying, metal material coating process, etc., can solve the influence of coating thermal cycle performance, low fracture toughness, and cannot solve the problem of strong gasification ability and flow Good properties and other problems, to achieve the effect of increased lattice distortion, strong phonon scattering ability, and improved fracture toughness

Active Publication Date: 2020-04-17
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned traditional plasma spraying powder making process is not applicable, especially the contradiction between strong gasification ability and good fluidity cannot be solved, so it is urgent to adjust the preparation and screening process
At the same time, it is necessary to overcome the shortcomings of the gadolinium zirconate material itself, especially the impact of low fracture toughness on the thermal cycle performance of the coating

Method used

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  • Rare earth oxide doped gadolinium zirconate powder for plasma physical vapor deposition and preparation method thereof
  • Rare earth oxide doped gadolinium zirconate powder for plasma physical vapor deposition and preparation method thereof
  • Rare earth oxide doped gadolinium zirconate powder for plasma physical vapor deposition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method of rare earth oxide doped gadolinium zirconate powder for plasma physical vapor deposition in this embodiment includes the following steps:

[0042] Step 1. Mix gadolinium salt, zirconium salt and ytterbium salt according to the molar ratio of Gd:Zr:Yb=0.9:1:0.1, then add deionized water and stir until the gadolinium salt, zirconium salt and ytterbium salt are completely dissolved to obtain mixture;

[0043] The total concentration of the gadolinium salt, zirconium salt and ytterbium salt in the mixed solution is 0.3 mol / L; the gadolinium salt is a water-soluble trivalent gadolinium salt, and the gadolinium salt used in this embodiment is gadolinium nitrate; The zirconium salt is a water-soluble tetravalent zirconium salt, the zirconium salt used in this embodiment is zirconium nitrate; the ytterbium salt is a water-soluble trivalent ytterbium salt, and the ytterbium salt used in this embodiment is ytterbium nitrate;

[0044] Step 2. Use ammonia water w...

Embodiment 2

[0055] The preparation method of rare earth oxide doped gadolinium zirconate powder for plasma physical vapor deposition in this embodiment includes the following steps:

[0056] Step 1. Mix the gadolinium salt, zirconium salt and scandium salt according to the molar ratio of Gd:Zr:Sc=0.9:1:0.1, then add deionized water and stir until the gadolinium salt, zirconium salt and scandium salt are completely dissolved to obtain mixture;

[0057] The sum of the concentration of gadolinium salt, zirconium salt and scandium salt in the mixed solution is 0.8 mol / L; the gadolinium salt is a water-soluble trivalent gadolinium salt, and the gadolinium salt used in this embodiment is gadolinium nitrate; The zirconium salt is a water-soluble tetravalent zirconium salt, the zirconium salt used in this embodiment is zirconium nitrate; the scandium salt is a water-soluble trivalent scandium salt, and the scandium salt used in this embodiment is scandium nitrate;

[0058] Step 2. Use ammonia water wit...

Embodiment 3

[0068] The preparation method of rare earth oxide doped gadolinium zirconate powder for plasma physical vapor deposition in this embodiment includes the following steps:

[0069] Step 1. Mix the gadolinium salt, zirconium salt and ytterbium salt according to the molar ratio of Gd:Zr:Yb=0.7:1:0.3, then add deionized water and stir until the gadolinium salt, zirconium salt and ytterbium salt are completely dissolved to obtain mixture;

[0070] The sum of the concentration of gadolinium salt, zirconium salt and ytterbium salt in the mixed solution is 0.6 mol / L; the gadolinium salt is a water-soluble trivalent gadolinium salt, and the gadolinium salt used in this embodiment is gadolinium nitrate; The zirconium salt is a water-soluble tetravalent zirconium salt, the zirconium salt used in this embodiment is zirconium nitrate; the ytterbium salt is a water-soluble trivalent ytterbium salt, and the ytterbium salt used in this embodiment is ytterbium nitrate;

[0071] Step 2. Use ammonia wa...

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Abstract

The invention discloses REO (rare earth oxide)-doped GZ (gadolinium zirconate) powder for PS-PVD (plasma spray physical vapor deposition) and a preparation method of the REO-doped GZ powder, and relates to the technical field of processing of GZ ceramic materials. The method comprises the following steps: gadolinium salt, zirconium salt and one of ytterbium salt or scandium salt are mixed uniformly in the mole ratio of (0.3-0.9):1:(0.1-0.7), deionized water is added, a mixed solution is obtained and subjected to single-phase sedimentation treatment, filtering and drying are performed, and a solid product is obtained; wet ball milling and dry ball milling are performed on the solid product sequentially, a ball milling product is filtered, a product is dried and then subjected to ball milling and uniform mixing with deionized water, a binder and a dispersant, and slurry is obtained; pH of the slurry is regulated, spray drying is performed, and granules are obtained; the granules are sintered in a sintering furnace, powder with diameter smaller than 18 mu m and larger than 50 mu m is screened out, fine powder and coarse powder are mixed uniformly, and the REO-doped GZ powder for PS-PVD is obtained. Flowability of the fine powder is improved while the gasification effect of the powder is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of processing gadolinium zirconate ceramic materials, in particular to a rare earth oxide doped gadolinium zirconate powder for plasma physical vapor deposition and a preparation method thereof. Background technique [0002] Thermal Barrier Coatings (TBCs) use the superior high temperature resistance, corrosion resistance and high thermal insulation properties of ceramic materials to combine ceramic and metal substrates in the form of coatings to increase the working temperature of metal hot end parts. A surface protection technology that enhances the resistance to high temperature oxidation of hot end components, prolongs the service life of hot end components, and improves engine efficiency. [0003] Gadolinium Zirconate (Gd 2 Zr 2 O 7 , Referred to as GZ) material has the advantages of good high-temperature phase stability (no phase change to 1500℃) and sintering resistance, and is regarded by scholars as a prom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/626C04B35/50C04B35/63C23C4/134C23C4/11
CPCC04B35/50C04B35/62605C04B35/62675C04B35/6303C04B2235/5436C23C4/11C23C4/134
Inventor 郭洪波赵聪李珊魏亮亮
Owner BEIHANG UNIV
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