mechanical and corrosion mechanisms of eutectic core-cell Zr-Ta-O/YSZ TBC (IMAGE)

Tsinghua University Press

mechanical and corrosion mechanisms of eutectic core-cell Zr-Ta-O/YSZ TBC

Caption

FIB-machined rectangular Zr-Ta-O nanopillars, compressed near-uniaxially via flat punch, achieved >30% engineering strain and 4.5 GPa yield strength without fracture—markedly surpassing traditional YSZ due to unique eutectic core-shell microstructure. During rapid cooling, progressively increasing compressive stress in the reaction layer drives sacrificial spallation that removes CMAS—thereby minimizing infiltration into underlying YSZ, preventing penetration near the bond coat, and preserving coating integrity.

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Journal of Advanced Ceramics, Tsinghua University Press

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