Mechanical and oxidation properties of C/SiC corrugated lattice core composite sandwich panels
Mechanical and oxidation properties of C/SiC corrugated lattice core composite sandwich panels
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DOI：
10.1016/j.compstruct.2016.09.034
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发表时间：
2016-12
影响因子：
6.3
通讯作者：
Fan Yang;S. Cheng;T. Zeng;Zhi-hai Wang;Guo-dong Xu;J. Zhai;D. Fang
中科院分区：
文献类型：
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作者：
Fan Yang;S. Cheng;T. Zeng;Zhi-hai Wang;Guo-dong Xu;J. Zhai;D. Fang
以聚碳硅烷为基体先驱体，采用先驱体浸渗热解法（PIP）制备了碳纤维增强碳化硅（C/SiC）波纹点阵芯复合材料夹层结构，研究了高温氧化对C/SiC复合材料夹层结构微观结构和力学性能的影响。结果表明，高温氧化对C/SiC复合材料夹层结构的力学性能有很大影响。当氧化时间为30 min时，C/SiC复合材料三明治结构的抗压强度随氧化温度的升高先降低后升高，受两种竞争机制控制。压缩模量略有变化。在1200 °C和1600 °C下氧化后，显示出不同的断裂行为。C/SiC复合材料三明治结构在1600 °C氧化后的压缩强度和模量随氧化时间的延长而降低。氧化60 min后出现脆性断裂。
Carbon fiber reinforced silicon carbide (C/SiC) corrugated lattice core composite sandwich structures were fabricated by precursor infiltration and pyrolysis (PIP) with polycarbosilane as the matrix precursor, and effects of high-temperature oxidation on the microstructures and mechanical properties of C/SiC composite sandwich structures were investigated. It was found that the high-temperature oxidation had a great effect on the mechanical properties of C/SiC composite sandwich structures. When the oxidation time was 30 min, the compression strength of C/SiC composite sandwich structures first decreased and then increased with the elevation of oxidation temperature controlled by two competition mechanisms. The compression modulus changed slightly. Different fracture behaviors were shown after oxidation at 1200 °C and 1600 °C. The compression strength and modulus of C/SiC composite sandwich structures after oxidation at 1600 °C decreased with oxidation time. The brittle fracture behavior appeared after 60 min oxidation.