热解含铁聚硅氧烷原位生长硅氧碳纤维制备硅氧碳复合材料.pdf

1046 2012 40 7 Vol. 40No. 7 2 0 1 2 7 JOURNAL OF THE CHINESE CERAMIC SOCIETY J u l y 2 0 1 2 ( 300072) TB332 A 0454–5648(2012)07–1046–04 2012–07–03 14:54:47 /kcms/detail/11.2310.TQ1454.201207.1046_022.html In-situ Growth of SiOC Fibers in SiOC Ceramic to Prepare SiOC/SiOC Composites f with Polysiloxane via Pre-mixing of Iron Chloride YIN ZhengeDU Hebao ZHOU FuqiangZONG WenxiLI Yali (Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China) Abstract: A nanocomposite of silicon oxycarbide (SiOC) ceramic and silicon oxycarbide fiber was fabricated with a polysiloxane precursor by pre-mixing of iron chloride in the precursor and subsequent crosslinking, molding and pyrolysis processes. The SiOC fibers are formed in the SiOC matrix via the in-situ growth, and the pores are developed in the ceramic body in an intermediate stage of pyrolysis process. The microstructure observation reveals that the SiOC fibers are distributed in the SiOC matrix and the orienta- tion of some fibers occurs. The interface of SiOC fibers and the ceramic matrix is formed. The energy spectral analysis indicates that the fibers have