单源聚合物先驱体法制备SiC-TiC复相陶瓷  

Preparation of SiC-TiC composite ceramics with a single-source-polymer precursor method

作　　者：裴亚星 周聪[2,3] 余兆菊 PEI Yaxing;ZHOU Cong;YU Zhaoju(Zhengzhou Research Institute for Abrasives&Grinding Co.,Ltd.,Zhengzhou 450002,China;College of Materials,Xiamen University,Xiamen 361005,China;School of Materials Science and Engineering,Anhui University of Technology,Wuhu 243002,China)

机构地区：[1]郑州磨料磨具磨削研究所有限公司,河南郑州450002 [2]厦门大学材料学院,福建厦门361005 [3]安徽工程大学材料科学与工程学院,安徽芜湖243002

出　　处：《厦门大学学报（自然科学版）》2022年第5期808-814,共7页Journal of Xiamen University：Natural Science

基　　金：国家自然科学基金(50802079);福建省自然科学基金(2011J01330);安徽省自然科学基金(1908085QE220)。

摘　　要：以四氯化钛(TiCl_(4))与烯丙基聚碳硅烷(AHPCS)为原料,通过化学改性成功制备聚钛碳硅烷单源先驱体,通过高温裂解先驱体进而制得SiC-TiC复相陶瓷.通过傅里叶变换红外光谱、X射线衍射、热重分析及扫描电子显微镜研究反应合成的聚钛碳硅烷先驱体的交联、陶瓷化转变过程、微观结构演变和结晶行为.研究结果证实TiCl_(4)和AHPCS发生缩合反应,制得了Ti掺杂的聚合物先驱体,TiCl_(4)的加入还能够促进AHPCS的热交联,进而提高最终的陶瓷产率.制备的SiC-TiC复相陶瓷的相组成和微观结构可通过对先驱体的成分和结构设计进行调节,该方法操作简便易行,结果可靠性高,具有一定的普遍适用性.Polytitaniumcarbosilane single source precursor was successfully prepared via chemical modification with titanium tetrachloride(TiCl_(4))and allylpolycarbosilane(AHPCS)as raw materials.SiC-TiC composite ceramics were prepared from pyrolysis of the precursor at high temperatures.The cross-linking,ceramic transformation,microstructure evolution,and crystallization behavior of the precursor of the synthesized polytitaniumcarbosilane were studied with Fourier transform-infrared spectroscopy,X-ray diffraction,thermogravimetric analysis and scanning electron microscope.The results showed that the condensation reaction of TiCl_(4)and AHPCS not only successfully prepared Ti-doped polymer precursor,but also promoted the hot cross-linking of AHPCS,and subsequently improved the final ceramic yield.The phase composition and microstructure of SiC-TiC composite ceramics are controllable through adjusting the composition and structure design of the precursor.The method is easy to operate,and the result is reliable and has certain universal applicability.

关 键 词：聚合物先驱体陶瓷 单源先驱体 复相陶瓷 四氯化钛 碳化钛 

分 类 号：TQ174[化学工程—陶瓷工业]