硅铝复合水解液对硅基陶瓷型芯高温性能的影响  

Effects of Impregnation by Hydrolysate with Different Si/Al Ratio on High Temperature Properties of Silica-based Ceramic Cores

作　　者：王丽丽 李嘉荣 唐定中 刘世忠 李鑫 牛书鑫 Wang Lili, Li Jiarong, Tang Dingzhong, Liu Shizhong, Yao Jiansheng, Gu Guohong, Li Xin, Niu Shuxin(Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Material)

机构地区：[1]中国航发北京航空材料研究院先进高温结构材料重点实验室

出　　处：《特种铸造及有色合金》2018年第5期521-524,共4页Special Casting & Nonferrous Alloys

摘　　要：以Si/Al质量比可调的硅铝复合水解液为研究对象,对硅基陶瓷型芯进行高温强化,并与硅酸乙酯水解液和硅溶胶强化的型芯进行性能对比。结果表明,采用Si/Al比为1∶3的硅铝复合水解液(SA13)强化后,型芯的密度、显气孔率、高温抗弯强度和抗变形能力介于硅酸乙酯水解液与硅溶胶之间;硅铝复合水解液(SA13)强化型芯的高温尺寸稳定性最佳,与单晶高温合金DD6接触的高温化学稳定性也有所提高。The properties of silica-based ceramic cores impregnated by the hydrolysate with different Si/Al ratio were analyzed comparatively for those of ethyl silicate hydrolysate（TOES）and Si-sol.The results reveal that the density,porosity,high temperature strength and the resistance of high temperature deformation of the ceramic cores impregnated by the composite hydrolysate with Si/Al ratio of 1∶3 are improved to some extent,and the values are between those of TOES and Si-sol.After impregnated by SA13,the cores present an optimal size stability and better high temperature chemical stability with DD6 superalloy.

关 键 词：硅基陶瓷型芯 高温强化 硅铝复合水解液 

分 类 号：TG249.5[机械工程—精密仪器及机械]