活性填料在先驱体转化陶瓷喷管中的应用  

Application of Active Filler in Preparation of Ceramic Nozzles by Preceramic Polymer Pyrolysis

作　　者：谢征芳[1] 陈朝辉[1] 肖加余[1] 

机构地区：[1]国防科技大学航天与材料工程学院,长沙410073

出　　处：《材料工程》2002年第10期29-32,共4页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目 ( 5 96 82 0 0 9)

摘　　要：以聚碳硅烷为先驱体 ,Al为活性填料 ,研究了活性填料 Al对 Si C陶瓷喷管的成型工艺、力学性能、抗氧炔焰烧蚀率、抗氧化和抗热震性能的影响。研究表明 ,喷管在裂解前后的体积基本不变。当喷管素坯中含有活性填料 Al时 ,材料的室温三点弯曲强度比不含活性填料材料的强度约提高 5 0 % ;抗氧炔焰烧蚀性能明显改善 ,抗氧炔焰烧蚀率为 0 .0 2 % ,比不含活性填料的喷管的抗氧炔焰烧蚀率降低了 3.0 7% ;The metallic aluminium (Al) powder as an active filler was applied in polycarbosilane (PCS) preceramic polymer derived SiC-base nozzles for the first time. The processing, flexural strength, ablation and oxidation-resistance properties of the resulting nozzles were investigated. The results show that, the volume of the nozzle will not change during pyrolysis, the flexural strength at room temperature of the slice in which Al filler is contained increases by 50% than that of the slice where active filler is not added. The ablation-resistance property of the resulting nozzle is greatly improved. After keeping in 2000℃ oxygen-acetylene flame for a minute, the weight loss of the nozzle with Al filler is only 0.02% which is 3.07% less than that without active fillers. Oxidation-resistance experiments show that the nozzle with Al filler have higher mass reservation than that without active fillers.

关 键 词：先驱体转化陶瓷喷管 活性填料 碳化硅 铝 成型工艺 导弹 聚碳硅烷 

分 类 号：TJ760.5[兵器科学与技术—武器系统与运用工程] TQ17[化学工程—硅酸盐工业]