注射成形工艺结合先驱体转化法制备碳化硅陶瓷  

Preparation of Silicon Carbide Ceramic by Injection Molding and Precursor Pyrolysis

作　　者：张勇[1] 何新波[1] 曲选辉[1] 赵珍[1] 孔祥磊[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《航空材料学报》2007年第6期64-68,共5页Journal of Aeronautical Materials

摘　　要：选择一种石蜡基多聚物粘结剂体系,在固含量为52vol%及最佳注射参数下,注射出良好的碳化硅陶瓷复杂件坯体,以二步法溶剂脱脂和热脱脂为脱脂工艺,得到的热脱脂坯通过聚碳硅烷先驱体溶液在真空下浸渍,并在1200℃氮气氛下裂解,使生坯密度提高到1.75g/cm3以上,再将烧结坯体于2100℃,Ar气氛下,保温1h进行固相烧结,得到的碳化硅陶瓷复杂件密度为3.11g/cm3,致密度为97%。Package boxes of Kovar were fabricated by ceramic injection molding process starting with powders of SiC, BC4 , C and a kind of wax-based polymer was selected as binders. When the powder solid loading was 52vol%, the optimal injection temperature was at 160 - 170℃ and injection pressure was under 100 - 120MPa. Two steps of solvent debinding and thermal debinding was set up to decompose the binder. The density of debinded green was increased to 1.75g/cm^3 by polycarbosilan（PCS） precursor infiltration. After being sintered under argon atmosphere for lh at 2100℃ , the boxes with density of 3. 11g/cm^3 and relative density of 97% could be produced.

关 键 词：陶瓷注射成形 先驱体 脱脂 碳化硅 

分 类 号：TF124.39[冶金工程—粉末冶金]