• Journal of Inorganic Materials
  • Vol. 39, Issue 1, 61 (2024)
Lingxiang GUO, Ying TANG, Shiwei HUANG, Bolan XIAO, Donghao XIA, and Jia SUN*
Author Affiliations
  • State Key Laboratory of Ultra High Temperature Composite Materials, Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials, Northwestern Polytechnical University, Xi’an 710072, China
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    DOI: 10.15541/jim20230370 Cite this Article
    Lingxiang GUO, Ying TANG, Shiwei HUANG, Bolan XIAO, Donghao XIA, Jia SUN. Ablation Resistance of High-entropy Oxide Coatings on C/C Composites[J]. Journal of Inorganic Materials, 2024, 39(1): 61 Copy Citation Text show less
    Phase characterizations of high-entropy oxide powders
    1. Phase characterizations of high-entropy oxide powders
    TEM analyses of M2R3O powders
    2. TEM analyses of M2R3O powders
    Surface and cross-section morphologies of high-entropy oxide coatings
    3. Surface and cross-section morphologies of high-entropy oxide coatings
    XRD patterns of high-entropy oxide coatings
    4. XRD patterns of high-entropy oxide coatings
    Binary phase diagrams of HfO2-RE2O3 and ZrO2-RE2O3 (RE=Sm, Er and Y)[30]
    5. Binary phase diagrams of HfO2-RE2O3 and ZrO2-RE2O3 (RE=Sm, Er and Y)[30]
    Surface temperature curves of high-entropy oxide coatings during ablation
    6. Surface temperature curves of high-entropy oxide coatings during ablation
    Macro morphologies of high-entropy oxide coatings after ablation
    7. Macro morphologies of high-entropy oxide coatings after ablation
    Mass ablation ratios and line ablation ratios of high- entropy oxide coatings
    8. Mass ablation ratios and line ablation ratios of high- entropy oxide coatings
    XRD patterns of high-entropy oxide coatings after ablation
    9. XRD patterns of high-entropy oxide coatings after ablation
    Cross-section morphologies and EDS analyses of high-entropy oxide coatings after cyclic ablation for 180 s(a-c) M1R3O; (d-f) M2R3O; (g-i) M3R3O
    10. Cross-section morphologies and EDS analyses of high-entropy oxide coatings after cyclic ablation for 180 s(a-c) M1R3O; (d-f) M2R3O; (g-i) M3R3O
    Comparison of ablation resistances between high-entropy oxide coatings and other coatings in the same ablation environment
    11. Comparison of ablation resistances between high-entropy oxide coatings and other coatings in the same ablation environment
    TEM analysis of M1R3O powders
    S1. TEM analysis of M1R3O powders
    TEM analysis of M3R3O powders
    S2. TEM analysis of M3R3O powders
    XRD refinement patterns of high-entropy oxide powders
    S3. XRD refinement patterns of high-entropy oxide powders
    Thermal conductivities of high-entropy oxides
    S4. Thermal conductivities of high-entropy oxides
    Surface microstructures of high-entropy oxide coatings after ablation (a-c) M2R3O coatings; (d-f) M3R3O coatings
    S5. Surface microstructures of high-entropy oxide coatings after ablation (a-c) M2R3O coatings; (d-f) M3R3O coatings
    HfZrSmErYSiO
    Spot A/(%, in atom)10.55.69.38.58.457.7
    Spot B/(%, in atom)5.64.75.18.710.43.861.7
    Table 1. EDS element point scanning analysis
    LabelConstituent$\frac{n(\text{Hf}+\text{Zr})}{n(\text{Sm}+\text{Er}+\text{Y})}$
    M1R3O(Hf0.125Zr0.125Sm0.25Er0.25Y0.25)O2-δ1/3
    M2R3O(Hf0.2Zr0.2Sm0.2Er0.2Y0.2)O2-δ2/3
    M3R3O(Hf0.25Zr0.25Sm0.167Er0.167Y0.167)O2-δ3/3
    Table 1. Compositions and component molar ratios of high-entropy oxides in this study
    ParameterValue
    Current/A410-430
    Voltage/V100-120
    Primary gas Ar/(L·min-1)65-70
    Second gas H2/(L·min-1)3.5-5.0
    Powder flow Ar/(L·min-1)5-7
    Spray distance/mm100
    Powder feed rate/(g·min-1)5-6
    Table 2. Parameters of SAPS for high-entropy oxide coatings
    Lingxiang GUO, Ying TANG, Shiwei HUANG, Bolan XIAO, Donghao XIA, Jia SUN. Ablation Resistance of High-entropy Oxide Coatings on C/C Composites[J]. Journal of Inorganic Materials, 2024, 39(1): 61
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