SiC(W)/Si3N4复相陶瓷的注射成型

本文深入了研究了硅烷偶联剂和ＳｉＣ晶须对注射悬浮体流变性的影响，并通过对注射夺力，保压压力和保压时间三参数三水平正交实验优化工艺参数，认为保压时间对烧结体质量影响显著，从而在注射成型机口流道处设置了加热装置和水冷却装置，延长了浇口封凝时间，通过能机物气相裂解色谱分析及有机物降解差热分析，制定了例题的有机载体脱脂制度最后用无压烧结采用多步保温法，成功地制备出发动机陶瓷静叶片。

Injection Moulding of SiC(W)/Si3N4 Composite Ceramics

The effect of silane coupling agent and SiC whisker on the rheologic behavior of injectedsuspension was studied. The process parameters were optimized by the orthogonal experiment ofthe three parameter and three levels of the injection pressure, holding pressure and holding time.To delay the consolication time of the sprue, the heating and cooling apparatus in the injectionmoulded machine were developed. A suitable debindering rule was fomulated by the analysis ofPGC and TGA of organic vehicles decomposition. Finally, the stationary blades of ceramic enginewere developed successfully by pressureless sintering with multi-step heat preservation.