Microstructure and anti-oxidation properties of multi-composition ceramic coatings for carbon/carbon composites
Source abstract
Abstract
Abstract To protect carbon/carbon (C/C) composites from oxidation at elevated temperature, an effective WSi 2 –CrSi 2 –Si ceramic coating was deposited on the surface of SiC coated C/C composites by a simple and low-cost slurry method. The microstructures of the double-layer coatings were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy analyses. The coating exhibited excellent oxidation resistance and thermal shock resistance. It could protect C/C composites from oxidation in air at 1773 K for 300 h with only 0.1 wt.% mass gain and endure the thermal shock for 30 cycles between 1773 K and room temperature. The excellent anti-oxidation ability of the double-layer WSi 2 –CrSi 2 –Si/SiC coating is mainly attributed to the dense structure of the coating and the formation of stable vitreous composition including SiO 2 and Cr 2 O 3 produced during oxidation.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · High-Temperature Coating Behaviors
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