Effects of sintering temperature on mechanical properties of 3D mullite fiber (ALF FB3) reinforced mullite composites
Effects of sintering temperature on mechanical properties of 3D mullite fiber (ALF FB3) reinforced mullite composites
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DOI：
10.1016/j.ceramint.2013.05.030
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发表时间：
2013-12
影响因子：
5.2
通讯作者：
Yi Wang;Haifeng Cheng;Haitao Liu;Jun Wang
中科院分区：
文献类型：
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作者：
Yi Wang;Haifeng Cheng;Haitao Liu;Jun Wang
提出了一种削弱三维莫来石纤维增强莫来石基复合材料界面结合、提高复合材料强度的新方法。首先，采用溶胶-凝胶法制备了Muf/Mu复合材料。研究了烧结温度对复合材料力学性能的影响。随着烧结温度从1000 °C升高到1300 °C，复合材料的三点弯曲强度先从66.17 MPa下降到41.83 MPa，然后又上升到63.17 MPa。为了解释复合材料的强度与烧结温度之间的关系，莫来石纤维和莫来石基体的形态和结构后，在相同的热处理的复合材料的制造条件进行了研究。最后，得出结论，这种强度变化的结果，在不同的烧结温度下的基体致密化，界面结合和纤维降解的综合影响。
A new method to weaken the interfacial bonding and increase the strength of 3D mullite fiber reinforced mullite matrix (Muf/Mu) composites is proposed and tested in this paper. Firstly, Muf/Mu composites were fabricated through sol–gel process with varied sintering temperature. Then, the effects of sintering temperature on mechanical properties of the composites were tested. As sintering temperature was raised from 1000 °C to 1300 °C, the three-point flexural strength of the composites firstly decreased from 66.17 MPa to 41.83 MPa, and then increased to 63.17 MPa. In order to explain the relationship between composite strength and sintering temperature, morphology and structure of the mullite fibers and mullite matrix after the same heat-treatment as in the fabrication conditions of the composites were also investigated. Finally, it is concluded that this strength variation results from the combined effects of matrix densification, interfacial bonding and fiber degradation under different sintering temperatures.