一锅法合成SiC-ZrC复相陶瓷前驱体及其性能  

One-pot Synthesis Precursor of SiC-ZrC Composite Ceramic Precursor and Its Properties

作　　者：田跃龙 冯志海[1] 胡继东[1] 吴永智[1] 李杨柱 TIAN Yuelong;FENG Zhihai;HU Jidong;WU Yongzhi;LI Yangzhu(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076;No.1 Military Representative Section of Rocket Army Armament Department,Beijing 100190)

机构地区：[1]航天材料及工艺研究所,北京100076 [2]火箭军装备部驻北京地区第一军事代表室,北京100190

出　　处：《宇航材料工艺》2020年第4期35-38,共4页Aerospace Materials & Technology

摘　　要：以甲基三氯硅烷、二氯二甲基硅烷、二氯二茂锆以及金属钠为原料,通过一锅反应合成出一种全新的SiC-ZrC复相陶瓷前驱体(HBZS)。利用TG、FTIR、XRD及SEM等对HBZS的热解行为、分子结构以及热解产物的微观形貌与结构进行了全面分析。结果表明:HBZS在900℃时可以完全裂解转化成SiC-ZrC复相陶瓷,陶瓷收率可达60%以上;裂解产物中ZrC相晶粒尺寸极小(10~45 nm)且均匀分散于连续的SiC相中。该前驱体可用于制备SiC-ZrC陶瓷纤维及陶瓷基复合材料。A novel polymeric precursor for SiC-ZrC composite ceramics was synthesized by methyl trichlorosilane,dimethyl dichlorosilane,zirconocene dichloride and sodium in one-pot synthesis. The pyrolysis behavior and structural evolution of the precursor,the microstructure and composition of the synthesized ceramics were fully investigated by TG,FTIR,XRD and SEM. The results show that the precursor can completely be transformed into SiC-ZrC composite ceramic after heat treatment in argon at temperatures above 900 ℃ with ceramic yields above 60%. The obtained ceramic consists mainly of amorphous matrix phase SiC, in which ZrC nanocrystallites are distributed uniformly with 10 to 45 nm in size. This new precursor is suitable for production of ultra-high temperature ceramic fiber and ceramic matrix composite.

关 键 词：陶瓷前驱体 碳化硅 碳化锆 复相陶瓷 

分 类 号：V45[一般工业技术—材料科学与工程]