Preparation of Mullite Whiskers and Their Enhancement Effect on Ceramic Matrix Composites  

作　　者：张锦化 WU Hongdan ZHANG Suxin Yu Jishun 侯书恩 

机构地区：[1]Engineering Research Center of Nano-Materials of Mineral of Education, Faculty of Material Science and Chemical Engineering, China University of Geosciences [2]State Key Laboratory of Geological Processes and Mineral Resources

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第3期471-475,共5页武汉理工大学学报（材料科学英文版）

摘　　要：Mullite whiskers were facilely prepared by sintering kyanite at high temperature, with the addition of AlF3·3H20. The as-prepared whiskers have been characterized systematically in terms of phase composition, morphology, and structure. Results showed that the morphology and size of mullite whiskers were strongly depended on the content of AlF3·3H20 and sintering temperature. At temperatures in the range of 1 100 to 1 500 ℃ with 4 wt% addition of AlF3·3H20, the well-shaped mullite whiskers were obtained. For an instance, the mullite whiskers with 5-10 μm in length and 0.1-0.2 μm in cross-section could be formed at 1 400 ℃, with 4 wt% addition of A1F3·3H20. Moreover, results showed that the addition of mullite whiskers into ceramic matrix enhanced its fracture toughness significantly.Mullite whiskers were facilely prepared by sintering kyanite at high temperature, with the addition of AlF3·3H20. The as-prepared whiskers have been characterized systematically in terms of phase composition, morphology, and structure. Results showed that the morphology and size of mullite whiskers were strongly depended on the content of AlF3·3H20 and sintering temperature. At temperatures in the range of 1 100 to 1 500 ℃ with 4 wt% addition of AlF3·3H20, the well-shaped mullite whiskers were obtained. For an instance, the mullite whiskers with 5-10 μm in length and 0.1-0.2 μm in cross-section could be formed at 1 400 ℃, with 4 wt% addition of A1F3·3H20. Moreover, results showed that the addition of mullite whiskers into ceramic matrix enhanced its fracture toughness significantly.

关 键 词：mullite whiskers KYANITE CERAMICS SEM nanocrystalline materials 

分 类 号：TQ174.1[化学工程—陶瓷工业]