Correlation of Process Conditions, Porosity Levels and Crystallinity in Atmospherically Plasma Sprayed Yb2Si2O7 Environmental Barrier Coatings
نویسندگان
چکیده
Environmental barrier coatings are necessary to protect fibre reinforced ceramics from high recession rates in fast and hot water vapor-containing gases as they typically found the gas sections of turbines. A standard material SiC/SiC composites is atmospherically plasma sprayed (APS) Yb2Si2O7. For this material, it difficult obtain at reasonable substrate temperatures both low porosity crystallinity levels during APS. In paper results prepared by a so-called velocity APS process also more conventional processes presented. All have been single layer deposition method which avoids inter passage bands. Furthermore, samples were heat-treated air 1300 °C for 100 h influence topcoat density on growth silica scale used silicon bond coat was studied.
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ژورنال
عنوان ژورنال: Journal of composites science
سال: 2021
ISSN: ['2504-477X']
DOI: https://doi.org/10.3390/jcs5080198