摘要
基于高马赫数导弹天线罩为应用背景,以Si粉、BN粉、SiO2粉为主要原料,采用反应烧结法制备Si3N4基复相陶瓷材料,探讨了原料组成、成型工艺及坯体密度对材料性能的影响。试验结果表明:当原料中Si、BN和SiO2分别为55%、30%和10%时,材料强度可达96.7MPa,断裂韧性可达1.80MPa.m1/2。同时材料具有良好的介电性能及热物理性能。
Si3N4 matrix ceramics which would be applied to super-high Math number missile radome was prepared via the reaction sintefing process. Si, BN and SiO2 powder were the main raw materials. The effects of the raw materials and the model processing parameters and the compact density on properties of the material were investigated. The experimental results showed that the material has the best mechanical properties （σb, KIC is 96.7MPa, 1.80MPa. m^1/2 , respectively） and better dielectric and thermal physic properties when the content （in raw mixture powder） of Si, BN, SiO2, is 55%, 30% and 10%, respectively.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2006年第2期44-47,共4页
Journal of National University of Defense Technology
基金
国家部委资助项目
国防科技重点实验室基金资助项目
关键词
天线罩
反应烧结
氮化硅
氮化硼
石英
陶瓷
radome
reaction binding sinterlng
silicon nitride
boron nitride
quartz
ceramics
