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High-entropy rare earth zirconate thermal barrier coating material with high thermal expansion coefficient and preparation method of high-entropy rare earth zirconate thermal barrier coating material
The invention discloses a high-entropy rare earth zirconate thermal barrier coating material with a high thermal expansion coefficient and a preparation method of the high-entropy rare earth zirconate thermal barrier coating material. The chemical composition of the thermal barrier coating material is (Ce < 0.2 > Nd < 0.2 > Sm < 0.2 > Eu < 0.2 > Yb < 0.2 >) < 2 > Zr < 2 > O < 7 >. The preparation method comprises the following steps: proportioning and mixing a rare earth source and a zirconium source according to a molar ratio in a molecular formula, then dropwise adding the mixture into ammonia water, continuously stirring to generate a flocculated precipitate, and then washing and drying the flocculated precipitate; and sintering the powder obtained by heat treatment to obtain the high-entropy rare earth zirconate thermal barrier coating material. According to the high-entropy rare earth zirconate coating material and the preparation method thereof, five-element high-entropy elements with equal molar ratio are designed at the rare earth site of rare earth zirconate to form the high-entropy rare earth zirconate coating material, the thermal expansion performance of the high-entropy rare earth zirconate coating material is tested to reach 11.69 * 10 <-6 > K <-1 >, the thermal expansion coefficient difference between the high-entropy rare earth zirconate coating material and an alloy matrix is smaller, internal stress caused by mismatching of the thermal expansion coefficients is reduced, and the thermal expansion performance of the the service life of the thermal barrier coating is prolonged.
本发明公开了一种高热膨胀系数的高熵稀土锆酸盐热障涂层材料及其制备方法。热障涂层材料的化学组成为(Ce0.2Nd0.2Sm0.2Eu0.2Yb0.2)2Zr2O7。制备方法包括如下步骤：将稀土源和锆源按分子式中的摩尔比进行配料混合，然后逐滴加入至氨水中，不断搅拌，生成絮凝沉淀物，然后洗涤并干燥；预热处理，再热处理得到的粉末烧结得到高熵稀土锆酸盐热障涂层材料。本发明通过在稀土锆酸盐的稀土位设计五元等摩尔比的高熵元素组合成高熵稀土锆酸盐涂层材料，测试其热膨胀性能达到11.69×10‑6K‑1，与合金基体的热膨胀系数差异更小，有利于降低由于热膨胀系数不匹配所导致的内应力，延长热障涂层的使用寿命。
High-entropy rare earth zirconate thermal barrier coating material with high thermal expansion coefficient and preparation method of high-entropy rare earth zirconate thermal barrier coating material
The invention discloses a high-entropy rare earth zirconate thermal barrier coating material with a high thermal expansion coefficient and a preparation method of the high-entropy rare earth zirconate thermal barrier coating material. The chemical composition of the thermal barrier coating material is (Ce < 0.2 > Nd < 0.2 > Sm < 0.2 > Eu < 0.2 > Yb < 0.2 >) < 2 > Zr < 2 > O < 7 >. The preparation method comprises the following steps: proportioning and mixing a rare earth source and a zirconium source according to a molar ratio in a molecular formula, then dropwise adding the mixture into ammonia water, continuously stirring to generate a flocculated precipitate, and then washing and drying the flocculated precipitate; and sintering the powder obtained by heat treatment to obtain the high-entropy rare earth zirconate thermal barrier coating material. According to the high-entropy rare earth zirconate coating material and the preparation method thereof, five-element high-entropy elements with equal molar ratio are designed at the rare earth site of rare earth zirconate to form the high-entropy rare earth zirconate coating material, the thermal expansion performance of the high-entropy rare earth zirconate coating material is tested to reach 11.69 * 10 <-6 > K <-1 >, the thermal expansion coefficient difference between the high-entropy rare earth zirconate coating material and an alloy matrix is smaller, internal stress caused by mismatching of the thermal expansion coefficients is reduced, and the thermal expansion performance of the the service life of the thermal barrier coating is prolonged.
本发明公开了一种高热膨胀系数的高熵稀土锆酸盐热障涂层材料及其制备方法。热障涂层材料的化学组成为(Ce0.2Nd0.2Sm0.2Eu0.2Yb0.2)2Zr2O7。制备方法包括如下步骤：将稀土源和锆源按分子式中的摩尔比进行配料混合，然后逐滴加入至氨水中，不断搅拌，生成絮凝沉淀物，然后洗涤并干燥；预热处理，再热处理得到的粉末烧结得到高熵稀土锆酸盐热障涂层材料。本发明通过在稀土锆酸盐的稀土位设计五元等摩尔比的高熵元素组合成高熵稀土锆酸盐涂层材料，测试其热膨胀性能达到11.69×10‑6K‑1，与合金基体的热膨胀系数差异更小，有利于降低由于热膨胀系数不匹配所导致的内应力，延长热障涂层的使用寿命。
High-entropy rare earth zirconate thermal barrier coating material with high thermal expansion coefficient and preparation method of high-entropy rare earth zirconate thermal barrier coating material
一种高热膨胀系数的高熵稀土锆酸盐热障涂层材料及其制备方法
JIN HONGYUN (author) / LI KAIYUN (author) / LUO XUEWEI (author) / HUANG SHUO (author) / HOU SHU'EN (author) / HONG JIANHE (author) / YUAN SHUOGUO (author)
2023-09-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2024
| European Patent Office | 2021
| European Patent Office | 2021