1. The characteristic of material removal rate
1.1. volume of material removed per minute
1.2. remove depth
1.2.1. increases [3]
1.2.1.1. higher viscosity can generate higher shear forces
1.2.1.1.1. higher magnetic field
1.2.2. decelerates [3]
1.2.2.1. after a certain level of speed
1.2.2.1.1. excessive yield stress
1.2.2.1.2. slipping
1.3. MR fluid ratio [4]
1.3.1. increase material removal rate
1.3.1.1. increase the abrasive particles
2. Stress concentration effect on asperities
2.1. concentrate
2.1.1. plastic deformation
2.2. Yield stress
2.2.1. shows a little or no deformation [5]
2.3. Jang et al. (2011)
2.3.1. burr
2.3.1.1. stiff burr
2.3.1.1.1. maximum stress produce
2.3.1.1.2. minimum stress produce
2.3.1.2. not stiff
2.3.1.2.1. burr start to bend
2.3.1.3. shorter burr
2.3.1.3.1. shorter
3. Micro mould geometrical precision
3.1. highly concern during polishing
3.2. micro features easily damaged [7]
3.3. biochips and optical devices are in micrometer sized features
3.4. high setting on the process parameters [8]
3.4.1. quality for geometric attributes of micro-features is important
4. The difference between MR polishing and conventional polishing
4.1. MR Polishing
4.1.1. Magnetic field
4.1.1.1. smart fluid
4.1.1.1.1. ratio of magnetically polarize particles
4.1.1.1.2. ratio of carrier liquid
4.1.1.1.3. align in chain-like structure
4.1.1.1.4. controllable finite yield stress [1]
4.1.2. Non magnetic field
4.1.2.1. MR fluid randomly dispersed
4.1.2.2. Newtonian fluid
4.1.3. Advantages
4.1.3.1. no subsurface damage [2]
4.1.3.2. remove residual stress
4.1.3.3. crack
4.2. Conventional
4.2.1. tiresome process
4.2.2. skill (precise finishing)
4.2.3. time consuming
4.2.4. unable to polish precisely
4.2.5. produce scratches
5. Magnetic Field Strength concentration and distribution
5.1. iron [7]
5.1.1. high purity of CIP
5.1.2. magnetically soft
5.1.3. high magnetic saturation (2.1T)
5.1.4. inexpansive
5.2. real magnetic fluid [8]
5.2.1. polydispersed
5.2.1.1. high
5.2.1.1.1. level of inter particles reduce
5.2.1.2. lower
5.2.1.2.1. fluid samples with a low level concentration of dipole interaction of particles