摘要
采用光固化3D打印技术,以硅酸锆为添加剂经过脱脂和烧结后制备了硅基陶瓷型芯。研究了硅酸锆加入量对增材制造硅基陶瓷型芯性能的影响。研究发现,随着硅酸锆加入量的增加,型芯Z方向的收缩率和开口气孔率逐渐下降,主要由于硅酸锆填充在氧化硅颗粒之间,阻碍了型芯的烧结;少量硅酸锆起到基体骨架作用,但过多的加入导致型芯的烧结程度降低,因此型芯的室温强度先提高后下降;加入15wt.%硅酸锆后,型芯高温抗蠕变性能提升,原因是硅酸锆熔点较高且分布在基体中阻碍石英玻璃的粘性流动。
The silica based ceramic core was prepared by light-curing 3D printing technology with zircon as additive after degreasing and sintering.The effect of zircon addition on the performance of 3D printed silicon-based ceramic core was studied.The study showed that with the increase of the amount of zircon addition,the shrinkage rate and open porosity in the Z direction of the core gradually decreased,mainly due to the filling of the zircon between the silica particles,which hindered the sintering of the core.A small amount of the zircon played the role of the matrix skeleton,but too much addition will reduce the sintering degree of the core,so the room temperature flexural strength of the core first increased and then decreased.After 15wt.%zircon was added,the high temperature creep resistance of the core was improved.The reason is that zircon had a high melting point and was distributed in the matrix to hinder the viscous flow of quartz glass.
作者
马月婷
尹绍奎
于瑞龙
周英伟
张勇
MA Yue-ting;YIN Shao-kui;YU Rui-long;ZHOU Ying-wei;ZHANG Yong(Shenyang Foundry Research Institute Co.,Ltd.,State Key Laboratory of Light Alloy Casting Technology for High-End Equipment,Shenyang 110022,Liaoning,China;Gree Electric Appliance,Inc.of Zhuhai,Zhuhai 519070,Guangdong,China)
出处
《铸造》
CAS
北大核心
2022年第6期735-738,739,740,共6页
Foundry
关键词
增材制造
光固化
陶瓷型芯
氧化硅
硅酸锆
additive manufacturing
light curing
ceramic core
silica
zircon
