Functionally graded composites with fibre gradients were prepared with three different ceramic matrices: ZrB2-SiC-Y2O3, ZrB2-MoSi2 and SiC-Y2O3, with short carbon fibres in amounts ranging from 0–50%. Short term oxidation tests at 1650 °C in air were carried out to study the influence of the graded architecture and fibre content on the structural stability and oxidation resistance. The composite layers were perfectly joined at the interface, with no visible defects. Even after oxidation testing, no spallation phenomena were observed. ZrB2-MoSi2 matrix proved to be the most effective in protecting the composite from oxidation thanks to the formation of a compact ZrO2-SiO2 scale.
Processing and oxidation resistance at 1650 °C of ZrB2-based UHTCMCs with short fibre gradients
Mor M.Primo
Writing – Original Draft Preparation
;Vinci A.
Secondo
Writing – Review & Editing
;Sciti D.Ultimo
Writing – Review & Editing
2024
Abstract
Functionally graded composites with fibre gradients were prepared with three different ceramic matrices: ZrB2-SiC-Y2O3, ZrB2-MoSi2 and SiC-Y2O3, with short carbon fibres in amounts ranging from 0–50%. Short term oxidation tests at 1650 °C in air were carried out to study the influence of the graded architecture and fibre content on the structural stability and oxidation resistance. The composite layers were perfectly joined at the interface, with no visible defects. Even after oxidation testing, no spallation phenomena were observed. ZrB2-MoSi2 matrix proved to be the most effective in protecting the composite from oxidation thanks to the formation of a compact ZrO2-SiO2 scale.| File | Dimensione | Formato | |
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