The Pyrolysis Processing of Polycarbosilane Studied by TG,XRF,IR,XRD,and XPS

摘要：

　　Polycarbosilane (PCS) is one of precursor systems applied in industry for the Polymer Infiltration Pyrolysis (PIP) processing of C or SiC fiber reinforced SiC matrix composites (Cf/SiC or SiCf/SiC CMC) materials.In this work,a series of PCS-derived SiC specimens treated at 300,550,800,and 1100 ℃ was studied by XRF,IR,XRD and XPS methods.The results show that a slight amount of PCS molecules with low softening point evaporates below 300 ℃; the cross-link between PCS chains takes place to form a 3D-Si-C-Si-network via the reaction between-Si-CH3,-Si-CH2-Si-and-Si-H groups in the temperature range of 300-550 ℃; an amorphous phase of SiC was observed when PCS was heated up to 800 ℃,which indicates the completion of transformation from organic to inorganic; above 800 ℃,β-SiC domain grows.Furthermore,a surface structure evolution of PCS-derived SiC specimens with temperature is proposed after the analyzing the XPS spectra.

关键词： Polycarbosilane Pyrolysis PCS-derived SiC Species

作者: Jian Jiao Haipeng Qiu Xiuqian Li Jinghua Luo Yu Wang

作者单位: Beijing Aeronautical Manufacturing Technology Research Institute,P.O.Box 863,Beijing 100024,P.R.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: 965-970

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）