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作者:

Yu, Yali (Yu, Yali.) | Zhang, Peng (Zhang, Peng.) | Zhang, Xuefei (Zhang, Xuefei.) | Wang, Dan (Wang, Dan.) | Liu, Xiangyang (Liu, Xiangyang.) | Pan, Wei (Pan, Wei.) | Wan, Chunlei (Wan, Chunlei.)

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EI Scopus SCIE

摘要:

The hierarchical porous microsphere is a promising feedstock for thermal barrier coatings (TBCs), due to its excellent flowability, high compression strength, and high temperature structure stability. This study aims to determine the formation mechanism of the coating deposited using hierarchical porous microspheres. For the (Sm0.2Gd0.2Dy0.2Er0.2Yb0.2)(2 )Zr2O7 hierarchical microsphere sintered at 1000 degrees C to 1550 degrees C, the thermal conductivity increased from 0.21 to 0.64 W/m & sdot;K, the compression strength increased from 13 MPa to 80 MPa. The hierarchical porous structure can inhibit the heat flow from the surface to interior, resulting in the low melting degree in the plasma jet. Additionally, the coatings exhibit the characteristics of nanostructured coatings and hierarchical porous zones inherited from the microspheres, as evidenced by a comparison of compression strength and impact strength during deposition. The as-sprayed nanostructured coating shows a significantly lower initial thermal conductivity of 0.33 W/m & sdot;K at 1000 degrees C compared to the conventional coating.

关键词:

Thermal barrier coatings Hierarchical porous microsphere Thermal conductivity Compression strength

作者机构:

  • [ 1 ] [Yu, Yali]Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing, Peoples R China
  • [ 2 ] [Zhang, Xuefei]Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing, Peoples R China
  • [ 3 ] [Wang, Dan]Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing, Peoples R China
  • [ 4 ] [Liu, Xiangyang]Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing, Peoples R China
  • [ 5 ] [Pan, Wei]Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing, Peoples R China
  • [ 6 ] [Wan, Chunlei]Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing, Peoples R China
  • [ 7 ] [Zhang, Peng]Beijing Univ Technol, Inst Welding & Surface Engn Technol, Fac Mat & Mfg, Beijing, Peoples R China

通讯作者信息:

  • [Liu, Xiangyang]Tsinghua Univ, Sch Mat Sci & Engn, 30 Shuangqing Rd, Beijing 100084, Peoples R China;;[Wan, Chunlei]Tsinghua Univ, Sch Mat Sci & Engn, 30 Shuangqing Rd, Beijing 100084, Peoples R China;;

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来源 :

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

ISSN: 0955-2219

年份: 2024

期: 2

卷: 45

5 . 7 0 0

JCR@2022

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SCOPUS被引频次: 2

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