Biomimetic teakwood structured Yb2Si2O7 coating by alternating vapor/liquid-phase deposition in PS-PVD (IMAGE)
Caption
The multi-scale layered structure of teak wood endows it with exceptional mechanical properties and environmental stability, which has inspired the biomimetic design of environmental barrier coatings. In this study, a multi-scale nano Yb2Si2O7-Yb2SiO5 composite EBC with a teakwood-like lamellar structure has been realized by a novel alternating vapor/liquid phase deposition method in plasma spraying-physical vapor deposition (PS-PVD). In this process, the SiO2 that is volatilized from Yb2Si2O7 is recaptured and deposited, and then undergoes an in-situ reaction with Yb2SiO5 in the coating through heat treatment, leading to the formation of Yb2Si2O7 and the construction of a regularly arranged multi-layered nanostructure. The coating designed with this structure is expected to significantly enhance its mechanical performance and corrosion resistance, offering the potential for long-term protection of aircraft engines in high-temperature environments.
Credit
Journal of Advanced Ceramics, Tsinghua University Press
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Credit must be given to the creator.
License
CC BY