Effect of melting state on the thermal shock resistance and thermal conductivity of APS ZrO2-7.5 wt.% Y2O3 coatings

Xuemei Song, Ziwei Liu, Tomi Suhonen, Tommi Varis, Liping Huang, Xuebin Zheng, Yi Zeng

    Research output: Contribution to journalArticleScientificpeer-review

    16 Citations (Scopus)

    Abstract

    The microstructures of two types of ZrO2-7.5 wt.% Y2O3 (YSZ) coatings fabricated by air plasma spraying (APS) but containing different amounts of columnar grains were investigated through scanning electron microscopy and electron backscatter diffraction analysis. Differences in the formation mechanisms of columnar and equiaxed grains were characterized using particles collected in a water container, from which it was found that these mechanisms are closely related to the melted state of the in-flight particles. Furthermore, it was found that the higher the columnar grain concentration of an as-sprayed coating, the higher its thermal shock resistance. This means that it is possible to improve the thermal shock resistance of APS YSZ coatings simply by introducing more columnar grains, as this increases their thermal conductivity. Using this knowledge, YSZ coatings with good thermal shock resistance and a thermal conductivity of 0.81 W·(m·K)- 1 at 1100 °C were successfully prepared.
    Original languageEnglish
    Pages (from-to)132-138
    JournalSurface and Coatings Technology
    Volume270
    DOIs
    Publication statusPublished - 2015
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    shock resistance
    thermal shock
    plasma spraying
    Plasma spraying
    Thermal shock
    Thermal conductivity
    Melting
    thermal conductivity
    yttria-stabilized zirconia
    melting
    coatings
    Coatings
    conductivity
    air
    Air
    Sprayed coatings
    Electron diffraction
    sprayed coatings
    Containers
    containers

    Keywords

    • air plasma spraying
    • YSZ coatings
    • columnar grains
    • thermal shock resistance
    • thermal conductivity
    • ProperPart
    • ProperTune

    Cite this

    Song, Xuemei ; Liu, Ziwei ; Suhonen, Tomi ; Varis, Tommi ; Huang, Liping ; Zheng, Xuebin ; Zeng, Yi. / Effect of melting state on the thermal shock resistance and thermal conductivity of APS ZrO2-7.5 wt.% Y2O3 coatings. In: Surface and Coatings Technology. 2015 ; Vol. 270. pp. 132-138.
    @article{0a769f9cdd454327bc1c89045500c5db,
    title = "Effect of melting state on the thermal shock resistance and thermal conductivity of APS ZrO2-7.5 wt.{\%} Y2O3 coatings",
    abstract = "The microstructures of two types of ZrO2-7.5 wt.{\%} Y2O3 (YSZ) coatings fabricated by air plasma spraying (APS) but containing different amounts of columnar grains were investigated through scanning electron microscopy and electron backscatter diffraction analysis. Differences in the formation mechanisms of columnar and equiaxed grains were characterized using particles collected in a water container, from which it was found that these mechanisms are closely related to the melted state of the in-flight particles. Furthermore, it was found that the higher the columnar grain concentration of an as-sprayed coating, the higher its thermal shock resistance. This means that it is possible to improve the thermal shock resistance of APS YSZ coatings simply by introducing more columnar grains, as this increases their thermal conductivity. Using this knowledge, YSZ coatings with good thermal shock resistance and a thermal conductivity of 0.81 W·(m·K)- 1 at 1100 °C were successfully prepared.",
    keywords = "air plasma spraying, YSZ coatings, columnar grains, thermal shock resistance, thermal conductivity, ProperPart, ProperTune",
    author = "Xuemei Song and Ziwei Liu and Tomi Suhonen and Tommi Varis and Liping Huang and Xuebin Zheng and Yi Zeng",
    year = "2015",
    doi = "10.1016/j.surfcoat.2015.03.011",
    language = "English",
    volume = "270",
    pages = "132--138",
    journal = "Surface and Coatings Technology",
    issn = "0257-8972",
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    Effect of melting state on the thermal shock resistance and thermal conductivity of APS ZrO2-7.5 wt.% Y2O3 coatings. / Song, Xuemei; Liu, Ziwei; Suhonen, Tomi; Varis, Tommi; Huang, Liping; Zheng, Xuebin; Zeng, Yi.

    In: Surface and Coatings Technology, Vol. 270, 2015, p. 132-138.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Effect of melting state on the thermal shock resistance and thermal conductivity of APS ZrO2-7.5 wt.% Y2O3 coatings

    AU - Song, Xuemei

    AU - Liu, Ziwei

    AU - Suhonen, Tomi

    AU - Varis, Tommi

    AU - Huang, Liping

    AU - Zheng, Xuebin

    AU - Zeng, Yi

    PY - 2015

    Y1 - 2015

    N2 - The microstructures of two types of ZrO2-7.5 wt.% Y2O3 (YSZ) coatings fabricated by air plasma spraying (APS) but containing different amounts of columnar grains were investigated through scanning electron microscopy and electron backscatter diffraction analysis. Differences in the formation mechanisms of columnar and equiaxed grains were characterized using particles collected in a water container, from which it was found that these mechanisms are closely related to the melted state of the in-flight particles. Furthermore, it was found that the higher the columnar grain concentration of an as-sprayed coating, the higher its thermal shock resistance. This means that it is possible to improve the thermal shock resistance of APS YSZ coatings simply by introducing more columnar grains, as this increases their thermal conductivity. Using this knowledge, YSZ coatings with good thermal shock resistance and a thermal conductivity of 0.81 W·(m·K)- 1 at 1100 °C were successfully prepared.

    AB - The microstructures of two types of ZrO2-7.5 wt.% Y2O3 (YSZ) coatings fabricated by air plasma spraying (APS) but containing different amounts of columnar grains were investigated through scanning electron microscopy and electron backscatter diffraction analysis. Differences in the formation mechanisms of columnar and equiaxed grains were characterized using particles collected in a water container, from which it was found that these mechanisms are closely related to the melted state of the in-flight particles. Furthermore, it was found that the higher the columnar grain concentration of an as-sprayed coating, the higher its thermal shock resistance. This means that it is possible to improve the thermal shock resistance of APS YSZ coatings simply by introducing more columnar grains, as this increases their thermal conductivity. Using this knowledge, YSZ coatings with good thermal shock resistance and a thermal conductivity of 0.81 W·(m·K)- 1 at 1100 °C were successfully prepared.

    KW - air plasma spraying

    KW - YSZ coatings

    KW - columnar grains

    KW - thermal shock resistance

    KW - thermal conductivity

    KW - ProperPart

    KW - ProperTune

    U2 - 10.1016/j.surfcoat.2015.03.011

    DO - 10.1016/j.surfcoat.2015.03.011

    M3 - Article

    VL - 270

    SP - 132

    EP - 138

    JO - Surface and Coatings Technology

    JF - Surface and Coatings Technology

    SN - 0257-8972

    ER -