ANTI-SINTERING HIGH-ENTROPY CERAMIC THERMAL BARRIER COATING POWDER MATERIAL FOR PLASMA SPRAYING PHYSICAL VAPOR DEPOSITION, AND PREPARATION METHOD THEREFOR - INSTITUTE OF NEW MAT GUANGDONG ACADEMY OF SCIENCES

Title:

ANTI-SINTERING HIGH-ENTROPY CERAMIC THERMAL BARRIER COATING POWDER MATERIAL FOR PLASMA SPRAYING PHYSICAL VAPOR DEPOSITION, AND PREPARATION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2024/032829

Kind Code:

A1

Abstract:

An anti-sintering high-entropy ceramic thermal barrier coating powder material for plasma spraying physical vapor deposition, and a preparation method therefor. The powder material is formed by the agglomeration of submicron/micron-sized rare earth oxide original powders and has a high degree of sphericity, a particle size distribution concentrated in the range of 5-50 μm, a low grain growth rate under ultrahigh-temperature conditions of 1500ºC, and an anti-sintering coefficient Rs of more than 0.5; and the powder material is composed of five rare earth elements of Y, La, Nd, Sm and Eu in an equal molar ratio, and presents uniform element distribution on both the micron and nano scales. The preparation method therefor comprises two steps of solid-phase sintering and spray granulation. The powder material is applicable to plasma spraying physical vapor deposition, has a good sintering resistance under the ultrahigh-temperature conditions of 1500ºC, has a simple preparation process, and is beneficial for batch preparation and engineering applications.

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Inventors:

LV BOWEN (CN)
MAO XIYE (CN)
WANG CHAO (CN)
TAN XI (CN)
ZHANG XIAOFENG (CN)
MAO JIE (CN)
DENG CHUNMING (CN)
DENG CHANGGUANG (CN)
LIU MIN (CN)

Application Number:

PCT/CN2023/128311

Publication Date:

February 15, 2024

Filing Date:

October 31, 2023

Export Citation:

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Assignee:

INSTITUTE OF NEW MAT GUANGDONG ACADEMY OF SCIENCES (CN)

International Classes:

C04B35/482; C04B35/48; C04B35/488; C23C4/134

Foreign References:

CN104496470A	2015-04-08
CN112839915A	2021-05-25
CN110272278A	2019-09-24
CN116377372A	2023-07-04
CN114149260A	2022-03-08

Other References:

LI, FEI, ET AL.: "High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials", JOURNAL OF ADVANCED CERAMICS, vol. 8, no. 4, 31 December 2019 (2019-12-31), XP093133150, ISSN: 2226-4108, DOI: 10.1007/s40145-019-0342-4

Attorney, Agent or Firm:

GUANGZHOU KEYUE I.P. LAW OFFICE (CN)

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