Effects of ZrO2 coating on the strength improvement of 2.5D SiCf/SiO2 composites
Source abstract
Abstract
Abstract In this study, 2.5 dimensional KD-II silicon carbide fiber-reinforced silicon dioxide (2.5D (SiC f /SiO 2 )) ceramic matrix composites with zirconium dioxide (ZrO 2 ) coating were successfully fabricated by sol–gel process. Effects of ZrO 2 coating on the flexural strength of the composites were comprehensively investigated. Results showed that the flexural strength of the ZrO 2 -coated SiC f /SiO 2 composites was approximately twice that of composites without coating. Moreover, the strength of the composites tested at 1200 °C increased approximately by 12% than that of the samples tested at room temperature. Further, the oxidation behavior of the composites was also investigated at high temperatures corresponding to 1300 and 1500 °C, which showed an increase in the bonding strength between SiC fibers and SiO 2 matrix. The evolution of microstructure revealed that ZrO 2 coating led to an increase in the surface roughness of fibers owing to the effective bonding between fibers and matrix.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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