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High-fracture-toughness rare earth zirconate/rare earth aluminate eutectic thermal barrier coating material and preparation method thereof
The invention belongs to the technical field of high-fracture-toughness ceramics, and particularly relates to a high-fracture-toughness rare earth zirconate/rare earth aluminate eutectic thermal barrier coating material. The material only contains two components, namely RE2Zr2O7 and REAlO3, the molar ratio of RE2Zr2O7 to REAlO3 is 1/3-2/3, and RE is selected from La, Pr, Nd, Sm, Gd, Tb and Dy. TheRE2Zr2O7/REAlO3 material with a eutectic (including hypoeutectic and hypereutectic) structure has the excellent properties of high melting point, excellent sintering resistance, high strength, low thermal conductivity and the like, and the fracture toughness of the RE2Zr2O7/REAlO3 material is greatly improved and is improved by 40% compared with that of pure rare earth zirconate from 2Mpam<1/2> to 2.8 Mpam<1/2> or above.
本发明属于高断裂韧性陶瓷技术领域，尤其涉及一种具有高断裂韧性稀土锆酸盐/稀土铝酸盐共晶热障涂层材料，其包括：材料中只存在RE2Zr2O7和REAlO3两种成分，且摩尔比处于1/3～2/3之间，RE选自La、Pr、Nd、Sm、Gd、Tb和Dy。共晶(包括亚共晶和过共晶)结构的RE2Zr2O7/REAlO3材料不仅具备高熔点、优异的抗烧结能力、高强度以及低热导率等优异的性能，其断裂韧性得到了大幅度提高，相比纯稀土锆酸盐提高了40％，由2Mpam1/2提高到了2.8Mpam1/2以上。
High-fracture-toughness rare earth zirconate/rare earth aluminate eutectic thermal barrier coating material and preparation method thereof
The invention belongs to the technical field of high-fracture-toughness ceramics, and particularly relates to a high-fracture-toughness rare earth zirconate/rare earth aluminate eutectic thermal barrier coating material. The material only contains two components, namely RE2Zr2O7 and REAlO3, the molar ratio of RE2Zr2O7 to REAlO3 is 1/3-2/3, and RE is selected from La, Pr, Nd, Sm, Gd, Tb and Dy. TheRE2Zr2O7/REAlO3 material with a eutectic (including hypoeutectic and hypereutectic) structure has the excellent properties of high melting point, excellent sintering resistance, high strength, low thermal conductivity and the like, and the fracture toughness of the RE2Zr2O7/REAlO3 material is greatly improved and is improved by 40% compared with that of pure rare earth zirconate from 2Mpam<1/2> to 2.8 Mpam<1/2> or above.
本发明属于高断裂韧性陶瓷技术领域，尤其涉及一种具有高断裂韧性稀土锆酸盐/稀土铝酸盐共晶热障涂层材料，其包括：材料中只存在RE2Zr2O7和REAlO3两种成分，且摩尔比处于1/3～2/3之间，RE选自La、Pr、Nd、Sm、Gd、Tb和Dy。共晶(包括亚共晶和过共晶)结构的RE2Zr2O7/REAlO3材料不仅具备高熔点、优异的抗烧结能力、高强度以及低热导率等优异的性能，其断裂韧性得到了大幅度提高，相比纯稀土锆酸盐提高了40％，由2Mpam1/2提高到了2.8Mpam1/2以上。
High-fracture-toughness rare earth zirconate/rare earth aluminate eutectic thermal barrier coating material and preparation method thereof
一种具有高断裂韧性稀土锆酸盐/稀土铝酸盐共晶热障涂层材料及其制备方法
WAN CHUNLEI (author) / LIU XIANGYANG (author) / PAN WEI (author)
2021-01-15
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2024
| European Patent Office | 2021
| European Patent Office | 2024