Synthesis of Si-N-C Ceramic Composites by Pyrolysis of Polysilazane and Polycarbosilane

摘要：

　　Non-oxide ceramics derived from organo-elemental precursors in the system Si-N-C has attracted much attention for its excellent properties.Typically,Si-N-C ceramic shows homogeneous elemental distribution,better high-temperature stability and oxidation resistance which making them attractive for applying in various branches of technology.A novel amorphous ceramic is fabricated from precursors mixed by polysilazane (PSZ) and polycarbosilane (PCS).The Si-N-C ceramics (PSZ/PCS=2(w/w)) are heat-treated between 1200℃ and 1500℃ in nitrogen to crystallization of microcrystalline α-Si3N4 and nanocrystalline SiC.The obtained Si-N-C ceramics are characterized by density,ceramic yield,porosity,X-ray diffraction and scanning electron microscope to analyze the crystallization and microstructure.The experimental results indicate that the ratio of PSZ/PCS and the annealing temperature have a big influence on the crystallization behavior.

关键词： Si-N-C ceramic Polysilazane Polycarbosilane Crystallization

作者: BAO Xingyi LI Song TANG Xiaoxia ZHANG Yue

作者单位: Key Laboratory of Aerospace Materials and Performance,Ministry of Education,School of Materials Science and Engineering,Beihang University,Beijing 100191,China

会议类型: 国际会议

会议名称: The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))

会议地点: 厦门

会议语种:英文

页码: 306-309

在线出版日期: 2011-11-04（万方平台首次上网日期，不代表论文的发表时间）