Pronounced enhancement of thermal expansion coefficients of rare-earth zirconate by cerium doping

Jun Yang, Meng Zhao, Lei Zhang, Ziyuan Wang, Wei Pan*

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    13 Citations (Scopus)

    Abstract

    Rare-earth zirconates (RE2Zr2O7, RE = rare earth elements) are considered as promising thermal barrier coating (TBCs) materials. However, their thermal expansion coefficient (TEC) is relatively low comparing with that of either the state-of-the-art TBCs material Yttria-stabilized Zirconia (YSZ), or the metallic bond-coat. In present research, Cerium was introduced as the substitution of Zirconium to improve the TEC of rare-earth zirconates. A series of Yb2(Zr1−xCex)2O7 solid solutions were synthesized and investigated. Experimental results revealed that their TEC is remarkably increased with the Cerium substitution content. Meanwhile, their thermal conductivity shows no obvious increase compared with that of Yb2Zr2O7due to the phonon scattering effect.

    Original languageEnglish
    Pages (from-to)1-5
    JournalScripta Materialia
    Volume153
    DOIs
    Publication statusPublished - 2018

    Keywords

    • Phonon scattering
    • Thermal barrier coating
    • Thermal conductivity
    • Thermal expansion coefficient

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