氧化铈颗粒在磁流变抛光液中的聚集-分散行为研究  

Agglomeration- dispersion Behaviors of Ceria Particles in Magneto- rheological Finishing Fluid

作　　者：李晓媛[1] 魏齐龙[1] 高伟[1] 王超[1] 汤光平[1] 何建国[1] 

机构地区：[1]中国工程物理研究院机械制造工艺研究所,四川绵阳621900

出　　处：《稀土》2016年第5期41-46,共6页Chinese Rare Earths

基　　金：国家重大科技专项(2013ZX04006011);中物院超精密加工技术重点实验室基金项目(K859-13-JCZ)

摘　　要：磁流变抛光液中双相颗粒的聚集分散行为关系到其流变性能及微观去除过程,本文通过对磁流变抛光液流变性能和微观结构的研究,分析了不同粒径的氧化铈抛光粉在抛光液中的聚集分散行为。实验表明,在相同工艺条件下,加入了不同粒径氧化铈抛光粉的磁流变抛光液的剪切屈服应力和零场粘度最大差距可达12倍与8倍。分析认为,粒径越小的氧化铈颗粒对磁流变抛光液的影响越明显:氧化铈粒径小,颗粒易团聚而增大粘度,同时也减小了抛光液中颗粒平均粒径和间距,增大了剪切作用。The agglomeration- dispersion behaviors of binary particles in magneto- rheological finishing fluid（ MRFF）had influence on rheological properties and microcosmic finishing. In this study,we analyzed the rheological properties and microstructure of MRFF which was prepared with ceria particles of different diameters. It was found that shear yield stress and zero- field viscosity can be varied 12 times and 8 times respectively for different finishing fluids. The research showed that smaller ceria particles displayed greater influence on the properties of MRFF. The smaller the particles are,the more easily MRFF would be coagulated. In addition,the smaller particles would reduce the size of average diameter as well as interval in MRFF,and enhanced shear yield stress. The study would provide theoretical and practical methods to design MRFF.

关 键 词：磁流变抛光液 氧化铈 微观结构 流变性能 

分 类 号：TQ133.3[化学工程—无机化工] O648.22[理学—物理化学]