Corrosion of Yb2SiO5/Yb2Si2O7/Si EBCs against Na2SO4 + 25 wt%NaCl molten salt at 1350 ℃
Source abstract
Abstract
The reaction behaviors and corrosion mechanisms of tri-layer Yb 2SiO 5/Yb 2Si 2O 7 /Si EBCs were explored in Na 2SO 4 + 25 wt%NaCl molten salt environment at 1350 °C. Results showed that the molten salt rapidly penetrated the Yb 2SiO 5 layer and then reacted with the Yb 2Si 2O 7 layer to form SiO 2 -riched Na-Yb-Si-O glass phase. The reaction product of glass phase diffused to the EBCs surface through the cracks and reacted with Yb 2SiO 5 to form Yb 2Si 2O 7. The reaction of Yb 2Si 2O 7 caused the development of transverse cracks, which eventually led to the failure of the EBCs. Moreover, the Yb 2SiO 5 layer exhibited better corrosion resistance than the Yb 2Si 2O 7 layer.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Nuclear materials and radiation effects · Glass properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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