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High-entropy rare earth strontium aluminate thermal barrier coating material with high fracture toughness and preparation method thereof
The invention discloses a high-entropy rare earth strontium aluminate thermal barrier coating material with high fracture toughness and a preparation method thereof, and belongs to the technical field of thermal barrier coatings. The chemical composition formula of the thermal barrier coating material provided by the invention is (La < 0.2 > Nd < 0.2 > Sm < 0.2 > Eu < 0.2 > Gd < 0 >) < 2 > Sr < Al < 2 > O < 7 >. The high-entropy rare earth strontium aluminate thermal barrier coating material is synthesized through a solid phase method. Through the high-entropy design of rare earth strontium aluminate, five different rare earth elements are doped in the rare earth site, the dislocation resistance of the ceramic is increased by utilizing a serious lattice distortion effect, and the mechanical property is improved. Through a nanoindentation test, the fracture toughness of the high-entropy rare earth strontium aluminate thermal barrier coating reaches 2.15 MPa.m < 0.5 >, so that the high-entropy rare earth strontium aluminate thermal barrier coating can better prevent growth and extension of cracks.
本发明公开了一种高断裂韧性的高熵稀土铝酸锶热障涂层材料及其制备方法，属于热障涂层技术领域。本发明提热障涂层材料的化学组成式为(La0.2Nd0.2Sm0.2Eu0.2Gd0.)2SrAl2O7。通过固相法合成高熵稀土铝酸锶热障涂层材料。本发明通过对稀土铝酸锶的高熵设计，在稀土位掺杂五种不同的稀土元素，利用严重晶格畸变效应增加了陶瓷的位错阻力，提升力学性能。通过纳米压痕测试，其断裂韧性达到了2.15MPa·m0.5，使得高熵稀土铝酸锶热障涂层更够更好的阻止裂纹的生长和延伸。
High-entropy rare earth strontium aluminate thermal barrier coating material with high fracture toughness and preparation method thereof
The invention discloses a high-entropy rare earth strontium aluminate thermal barrier coating material with high fracture toughness and a preparation method thereof, and belongs to the technical field of thermal barrier coatings. The chemical composition formula of the thermal barrier coating material provided by the invention is (La < 0.2 > Nd < 0.2 > Sm < 0.2 > Eu < 0.2 > Gd < 0 >) < 2 > Sr < Al < 2 > O < 7 >. The high-entropy rare earth strontium aluminate thermal barrier coating material is synthesized through a solid phase method. Through the high-entropy design of rare earth strontium aluminate, five different rare earth elements are doped in the rare earth site, the dislocation resistance of the ceramic is increased by utilizing a serious lattice distortion effect, and the mechanical property is improved. Through a nanoindentation test, the fracture toughness of the high-entropy rare earth strontium aluminate thermal barrier coating reaches 2.15 MPa.m < 0.5 >, so that the high-entropy rare earth strontium aluminate thermal barrier coating can better prevent growth and extension of cracks.
本发明公开了一种高断裂韧性的高熵稀土铝酸锶热障涂层材料及其制备方法，属于热障涂层技术领域。本发明提热障涂层材料的化学组成式为(La0.2Nd0.2Sm0.2Eu0.2Gd0.)2SrAl2O7。通过固相法合成高熵稀土铝酸锶热障涂层材料。本发明通过对稀土铝酸锶的高熵设计，在稀土位掺杂五种不同的稀土元素，利用严重晶格畸变效应增加了陶瓷的位错阻力，提升力学性能。通过纳米压痕测试，其断裂韧性达到了2.15MPa·m0.5，使得高熵稀土铝酸锶热障涂层更够更好的阻止裂纹的生长和延伸。
High-entropy rare earth strontium aluminate thermal barrier coating material with high fracture toughness and preparation method thereof
一种高断裂韧性的高熵稀土铝酸锶热障涂层材料及其制备方法
ZHANG SHENG (author) / JIN HONGYUN (author) / HONG JIANHE (author) / LI KAIYUN (author) / YANG JING (author) / WEI BENBEN (author) / WANG XUAN (author) / YANG BO (author)
2024-06-21
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2021
| European Patent Office | 2021
| European Patent Office | 2024