Preparation and properties of SiOC ceramic modified carbon fiber needled felt preform composites
Preparation and properties of SiOC ceramic modified carbon fiber needled felt preform composites
复制标题
SiOC陶瓷改性碳纤维针刺毡预制复合材料的制备及性能
DOI：
10.1016/j.ceramint.2019.09.148
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发表时间：
2020-02
影响因子：
5.2
通讯作者：
Qu Qiang
中科院分区：
文献类型：
--
作者：
Sun Yueqi;Hong Changqing;Zhang Xinghong;Han Jiecai;Qu Qiang
以甲基三甲氧基硅烷（MTMS）和二甲氧基二甲氧基硅烷（DMDMS）为前驱体，采用前驱体渗透热解（PIP）法制备了密度分别为0.4和0.7 g/cm3的SiOC陶瓷改性碳纤维针刺毡预成型复合材料（Cf/SiOC）。通过扫描电镜（SEM）分析不同PIP时间下Cf/SiOC复合材料微观结构的致密化行为。结果表明：随着PIP次数的增加，大量SiOC陶瓷被引入预成型中，完全覆盖在碳纤维上并占据了开放的孔隙；通过各种试验研究了复合材料的热性能、力学性能和抗氧化性能。结果表明，在RT-1500 °C时，经过两次PIP处理后，复合材料的导热系数分别为0.41-2.54和1.28-4.04 W/（m·K）。复合材料的抗压强度达到了2.1 MPa和7.8 MPa，分别是原始预制体的3.5倍和6.5倍。SiOC陶瓷的掺入可以显著提高复合材料在600 ℃时的抗氧化能力。在600 °C氧化60分钟后，氧化重量损失仅为2.1 wt%。
SiOC ceramic modified carbon fiber needled felt preform composites (Cf/SiOC) with densities of 0.4 and 0.7 g/cm3were prepared by precursor infiltration and pyrolysis (PIP) method using methyltrimethoxysilane (MTMS) and dimethyldimethoxysilane (DMDMS) as precursors. The densification behavior was investigated through scanning electron microscopy (SEM) analysis of microstructure of Cf/SiOC composites undergoing different PIP times. The results indicate that with increase of PIP times, a great amount of SiOC ceramic was introduced into the preform, completely covering on the carbon fibers and occupying the open pores. The thermal performance, mechanical properties, and oxidation resistance of the composites were studied via various tests. The results illustrate that after two-time PIP procedure, thermal conductivities of the composites are 0.41–2.54 and 1.28–4.04 W/(m·K) inzdirection andx/yplane, respectively, at RT-1500 °C. The compressive strengths of the composite arrive at 2.1 MPa inzdirection and 7.8 MPa inx/yplane, which are almost 3.5 times and 6.5 times, respectively, counterparts of the raw preform. The incorporation of SiOC ceramic can remarkably improve anti-oxidation ability of the composites at 600 °C. The oxidation weight loss is merely 2.1 wt% after 60-min oxidation at 600 °C.
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影响因子：
5.7
作者：
G. Sorarù;Yujun Zhang;M. Ferrari;L. Zampedri;R. Gonçalves
通讯作者：
G. Sorarù;Yujun Zhang;M. Ferrari;L. Zampedri;R. Gonçalves
影响因子：
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作者：
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作者：
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通讯作者：
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影响因子：
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作者：
DAVIES, IJ;RAWLINGS, RD
通讯作者：
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影响因子：
2.7
作者：
RENLUND, GM;PROCHAZKA, S;DOREMUS, RH
通讯作者：
DOREMUS, RH