Influence of SiC content on the oxidation of carbon fibre reinforced ZrB2/SiC composites at 1500 and 1650 °C in air |
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Authors: | Antonio Vinci Luca Zoli Diletta Sciti |
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Affiliation: | CNR-ISTEC, Institute of Science and Technology for Ceramics, Via Granarolo 64, I-48018 Faenza, Italy |
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Abstract: | The microstructure and the oxidation resistance in air of continuous carbon fibre reinforced ZrB2–SiC ceramic composites were investigated. SiC content was varied between 5–20?vol.%, while maintaining fibre content at ~40?vol.%. Short term oxidation tests in air were carried out at 1500 and 1650?°C in a bottom-up loading furnace. The thickness, composition and microstructure of the resulting oxide scale were analysed by SEM-EDS and X-Ray diffraction. The results show that contents above 15?vol.% SiC ensure the formation of a homogeneous protective borosilicate glass that covers the entire sample and minimizes fibre burnout. The scale thickness is ~90?μm for the sample containing 5?vol.% SiC and decreases with increasing SiC content. |
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Keywords: | Ceramic-matrix composites (CMCs) Ultra-High-Temperature-Ceramics (UHTCs) Oxidation resistance Microstructure Carbon fibre |
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