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Hexagonal magnetoplumbite structure high-entropy thermal barrier coating material with high fracture toughness and preparation method of hexagonal magnetoplumbite structure high-entropy thermal barrier coating material
The invention discloses a hexagonal magnetoplumbite structure high-entropy thermal barrier coating material with high fracture toughness and a preparation method of the hexagonal magnetoplumbite structure high-entropy thermal barrier coating material. The chemical composition formula is LnMAl11O19, the Ln site is (La < 0.2 > Nd < 0.2 > Sm < 0.2 > Eu < 0.2 > Gd < 0.2 >), and the M site is Zn or Mg. The preparation method comprises the following steps: S1, weighing metal element oxides according to a chemical composition formula, mixing, and carrying out wet ball milling; s2, filtering, cleaning and drying the ball-milled material; and S3, pre-burning the dried powder, and then calcining. According to calculation of atomic size difference and mass difference, under the condition that a single-phase solid solution is formed, LnMAl11O19 with the Ln position being (La0. 2Nd0. 2Sm0. 2Eu0. 2Gd0. 2) is screened out, the fracture toughness of the hexagonal magnetoplumbite structure is remarkably improved, a phase generated after doping is very stable at high temperature, impure phases are not generated, and the comprehensive performance of the hexagonal magnetoplumbite structure is remarkably improved.
本发明的一种高断裂韧性的六方磁铅石结构高熵热障涂层材料及其制备方法。化学组成式为LnMAl11O19，Ln位是(La0.2Nd0.2Sm0.2Eu0.2Gd0.2)，M位为Zn或Mg。制备方法：S1，按照化学组成式称取金属元素氧化物后混合湿法球磨；S2，将球磨后的物料过滤清洗后干燥；S3，将干燥后的粉末预烧后再煅烧。本发明根据原子尺寸差和质量差计算，在满足形成单相固溶体的条件下，筛选出Ln位是(La0.2Nd0.2Sm0.2Eu0.2Gd0.2)的LnMAl11O19，显著提高六方磁铅石结构的断裂韧性，且掺杂后生成的物相在高温下也十分稳定，不会产生杂相，对六方磁铅石结构的综合性能提升明显。
Hexagonal magnetoplumbite structure high-entropy thermal barrier coating material with high fracture toughness and preparation method of hexagonal magnetoplumbite structure high-entropy thermal barrier coating material
The invention discloses a hexagonal magnetoplumbite structure high-entropy thermal barrier coating material with high fracture toughness and a preparation method of the hexagonal magnetoplumbite structure high-entropy thermal barrier coating material. The chemical composition formula is LnMAl11O19, the Ln site is (La < 0.2 > Nd < 0.2 > Sm < 0.2 > Eu < 0.2 > Gd < 0.2 >), and the M site is Zn or Mg. The preparation method comprises the following steps: S1, weighing metal element oxides according to a chemical composition formula, mixing, and carrying out wet ball milling; s2, filtering, cleaning and drying the ball-milled material; and S3, pre-burning the dried powder, and then calcining. According to calculation of atomic size difference and mass difference, under the condition that a single-phase solid solution is formed, LnMAl11O19 with the Ln position being (La0. 2Nd0. 2Sm0. 2Eu0. 2Gd0. 2) is screened out, the fracture toughness of the hexagonal magnetoplumbite structure is remarkably improved, a phase generated after doping is very stable at high temperature, impure phases are not generated, and the comprehensive performance of the hexagonal magnetoplumbite structure is remarkably improved.
本发明的一种高断裂韧性的六方磁铅石结构高熵热障涂层材料及其制备方法。化学组成式为LnMAl11O19，Ln位是(La0.2Nd0.2Sm0.2Eu0.2Gd0.2)，M位为Zn或Mg。制备方法：S1，按照化学组成式称取金属元素氧化物后混合湿法球磨；S2，将球磨后的物料过滤清洗后干燥；S3，将干燥后的粉末预烧后再煅烧。本发明根据原子尺寸差和质量差计算，在满足形成单相固溶体的条件下，筛选出Ln位是(La0.2Nd0.2Sm0.2Eu0.2Gd0.2)的LnMAl11O19，显著提高六方磁铅石结构的断裂韧性，且掺杂后生成的物相在高温下也十分稳定，不会产生杂相，对六方磁铅石结构的综合性能提升明显。
Hexagonal magnetoplumbite structure high-entropy thermal barrier coating material with high fracture toughness and preparation method of hexagonal magnetoplumbite structure high-entropy thermal barrier coating material
一种高断裂韧性的六方磁铅石结构高熵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)
2023-05-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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