Rheological Properties and MR polishing Characteristics of Core Shell-Structured Silica-Coated CI particles
Recently,ultra-precision polishing processes using smart materials such as magnetorheological(MR)fluids have been used for optics parts such as aspheric lenses.The MR fluid applied in MR polishing is a phase controllable suspension comprising a mixture of CI particles and non-magnetic fluids such as mineral oil and water.The fluids are a kind of smart material that can be controlled according to their flow properties such as viscosity and stiffness.Water-based MR fluids are easily oxidized if the fluids are exposed and this oxidation can bring irregular polishing results.Also,this phenomenon is one of several factors that reduce the life time of MR fluids.In a previous work,CI particles were coated with a polymer or a composite for the improvement of dispersion stability and prevention of corrosion due to oxidation.From this study,the rheological properties such as viscosity and sedimentation of coated CI particles with silica were investigated with a rotational rheometer; MR polishing characteristics of BK7 glass were studied in order to investigate the surface roughness.The wheel speed and magnetic field intensity were chosen as variables.
Magnetorheological polishing Silica Viscosity Surface roughness Material removal
HONG Kwang-Pyo CHOI Seung-Bok KIM Gun-Hee CHOI Hyoung-Jin CHO Myeong-Woo
Department of Mechanical Engineering,Inha University,Incheon 402-751,Korea Korea Institute of Industrial Technology,Incheon 406-840,Korea Department of Polymer Science and Engineering,Inha University,Incheon 402-751,Korea
国际会议
The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)
北京
英文
1-5
2012-10-22（万方平台首次上网日期，不代表论文的发表时间）