Nano-structure tetragonal phase gadolinium-ytterbium co-doped YSZ spherical powder and preparation method thereof

The nanostructured tetragonal phase gadobite-ytterbium co-doped YSZ spherical powder was prepared by chemical co-precipitation method and multiple sintering processes, which solved the problem of phase change and sintering of YSZ thermal barrier coating at high temperatures, and achieved high density and high temperature phase stability powder, which was suitable for the preparation of high-performance thermal barrier coatings.

CN119638410APending Publication Date: 2025-03-18LIAONING SILICATE RES INST
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Patent Information

Application Number
CN202411902943.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

The existing YSZ thermal barrier coating materials will undergo phase transition and sintering at high temperatures, resulting in deterioration of thermal physical and mechanical properties and cannot meet the requirements of higher operating temperatures.

Method used

Nanostructured tetragonal phase gadobite co-doped YSZ spherical powder was prepared by chemical co-precipitation method. Planetary ball mills and ultrasonic dispersion technology were used, combined with spray granulation and multiple sintering processes to optimize the particle size, morphology and density of the powder.

Benefits of technology

The obtained nanostructured tetragonal phase gadobite-ytterbium co-doped YSZ spherical powder has high density, good high-temperature phase stability and excellent fluidity. It is suitable for plasma spraying, significantly improving the performance of thermal barrier coating.

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Abstract

The invention discloses a nano-structure tetragonal phase gadolinium-ytterbium co-doped YSZ spherical powder and a preparation method thereof. The method comprises the following steps: preparing hydroxide colloid by using rare earth chlorides, zirconium oxychloride and ammonia water as raw materials through a chemical coprecipitation method; the preparation method comprises the following steps: preparing a hydroxide colloid, cleaning the hydroxide colloid for multiple times, filtering to meet the requirement, directly adding proper dispersing agent, deionized water and binder to prepare slurry, forming an aggregate with a micron size and a reserved nano structure through spray granulation, and finally performing primary and secondary sintering to obtain the tetragonal phase compact spherical powder. The nanostructure tetragonal phase gadolinium-ytterbium co-doped YSZ spherical powder obtained by the invention is high-performance powder, and can be used as a thermal barrier coating of a hot end component of an aero-engine or a gas turbine. The process is shortened, the probability of introducing impurities is reduced, the purity of the powder is improved, and the process is convenient to operate, suitable for batch production, moderate in cost and good in market popularization prospect.
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