Study on the Highe-Temperature Mechanical of Al₂O_3f/SiO₂ and SiO_2f/SiO₂ Ceramic Matrix Composites

Abstract:

Al₂O_3f/SiO₂ and SiO_2f/SiO₂ ceramic matrix composites were manufactured by silica sol-infiltration-sintering method. The mechanical properties of composites under room temperature to 1200 °C were tested on-line with universal testing machine. It is found that Al₂O_3f/SiO₂ composites present a higher strength than SiO_2f/SiO₂ at room temperature and 1000 °C. The strength of two composites dramatic decrease with temperature increased to 1200 °C. Also, SEM and XRD methods were adopted to investigate the micro-structure of cross-fraction and crystal phase of composites, indicating a strong interaction between fibers and matrix under high temperature. Finally, the dielectric properties of two composites under room temperature to 1200 °C were discussed.

• Periodical: Solid State Phenomena (Volume 330)
• Pages: 91-98
• DOI: https://doi.org/10.4028/p-6kd5u0
• Online since: April 2022
• Authors: Ji Liang Ci, Feng Dan Cui, Li Li Zhang, Jian Zhang, Yi Lv, Ying Min Zhao*, Hao Zhang
• Keywords: Al₂O₃ Fibers, Failure Mechanisms, Fiber-Reinforced Ceramic Composites, Mechanical Properties, SiO₂ Matrix

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