材料科学
复合材料
抗弯强度
泥浆
立方氧化锆
陶瓷基复合材料
陶瓷
烧结
热解
多孔性
聚合物
化学工程
工程类
作者
Hao Li,Munan Lu,Yufeng Xue,Wenfeng Qiu
标识
DOI:10.1016/j.ceramint.2022.05.261
摘要
The continuous Nextel™ 720 fiber-reinforced zirconia/alumina ceramic matrix composites (CMCs) were prepared by slurry infiltration process and precursor infiltration pyrolysis (PIP) process. The introduction of submicron zirconia powders into the aqueous slurry was optimized to offer comprehensively good sintering activity, high thermal resistance and good mechanical properties for the CMCs. Meanwhile, the zirconia and alumina preceramic polymers were used to strengthen the porous ceramic matrix through the PIP process. The final CMC sample achieved a high flexural strength of 200 MPa after one infiltration cycle of alumina preceramic polymer and thermal treatment at 1150 °C for 2 h. The flexural strength retention of the improved CMC sample was 104% and 89% respectively after thermal exposure at 1100 °C and 1200 °C for 24 h.
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