赵菁,徐瀚川,茹红强,袁志刚.凝胶辅助发泡法制备三维互联多孔SiC陶瓷[J].稀有金属材料与工程,2020,49(2):618~622.[Zhao Jing,Xu Hanchuan,Ru Hongqiang,Yuan Zhigang.Fabrication of 3D interconnected porous SiC by gel-assisted foaming method[J].Rare Metal Materials and Engineering,2020,49(2):618~622.]
凝胶辅助发泡法制备三维互联多孔SiC陶瓷
投稿时间:2019-03-28  修订日期:2019-05-08
中文关键词:  三维互联多孔SiC  搅拌发泡  冷冻-凝胶  孔隙率
基金项目:国家自然科学基金资助(项目号51772048),沈阳理工大学引进高层次人才科研支持计划(项目号105000100032)
中文摘要:
      本文通过结合机械搅拌发泡法和冷冻-凝胶法制备了三维互联多孔SiC陶瓷材料,所获得的多孔陶瓷材料孔径分布均匀、孔结构可调并具有双级孔结构。研究了PVA含量与搅拌速度对多孔陶瓷孔结构及性能的影响。结果表明,随着PVA含量的增加,孔结构均匀程度和联通性提高、一级孔孔径尺寸逐渐减小且孔壁变薄。当ω(PVA)/ω(SiC)为1.5时,样品孔径分布最均匀;并且随着搅拌速度的增大,孔隙率增加、联通性增强、一级孔孔径尺寸减小,当转速为1600 r/min时,SiC多孔陶瓷的孔隙率和抗压强度分别为:88.42 %和4.36 MPa。
Fabrication of 3D interconnected porous SiC by gel-assisted foaming method
英文关键词:3D interconnected porous SiC  stirring-foaming  freeze-gelcasting  porosity
英文摘要:
      In this work, three dimensional interconnected porous SiC ceramics were prepared via combining stirring-foaming and freeze-gelcasting. The obtained porous ceramics with tunable porous structure, uniform pore size distribution and multiply porous structure were fabricated successfully. The effect of PVA and stirring speed on porous structure and properties of SiC porous ceramics were investigated.The results showed that porous structure uniformity could be tuned by varying ω(PVA)/ω(SiC) , and until optimum when the values was 1.5. The porosity increased, 1st mode pore size and pore wall thickness decreased with the increasing of PVA content. The porous structure could be improved by increasing stirring speed. When stirring speed was 1600 r/min, the porosity and compressive strength were 88.42 % and 4.36 MPa, respectively.
作者单位E-mail
赵菁 沈阳理工大学 材料科学与工程学院 zhaojing-84@163.com 
徐瀚川 沈阳理工大学 材料科学与工程学院  
茹红强 东北大学 材料各向异性与织构教育部重点实验室  
袁志刚 沈阳理工大学 材料科学与工程学院  
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