Study on the rheological and polishing properties of electromagnetic two-phase composite particles with abrasive characteristics

Journal of Intelligent Material Systems and Structures

Yin

2023

Electrorheological polishing (ERP) is an important field-assisted polishing method, which can reduce abrasive loss and improve machining efficiency by using the electric field-induced electrorheological (ER) effect to help the abrasive to overcome the centrifugal force caused by high rotating speed during polishing. ERP has many advantages, including high efficiency, high precision, facile polishing for a small object, and a good application prospect in polishing optical devices and hard molds. This review describes the research progress in ERP in the past two decades. The mechanism of electrorheological polishing is analyzed from two aspects of electrorheological effect and dielectrophoresis. According to the time sequence of electrorheological polishing development, two kinds of ERP materials including the simple mixing system and composite particle system are introduced. ERP electrodes including off-axis bipolar electrode, needle-ring electrode, needle-like single electrode, one-sided patterned electrode, and one-sided simple composite electrode are described. From the two characterization quantities of removal rate and surface quality, the industrial factors affecting the ERP effect are discussed. The advantages and disadvantages of ERP and other polishing processes are compared. Finally, the remaining challenges and possible development trends in ERP technology for the future outlook are proposed.

Section: Polishing Electrodementioning

confidence: 99%

Progress in the study of electrorheological polishing: A review

Journal of Intelligent Material Systems and Structures

Yin

2023

“…Chen et al combined ER polishing with magnetorheological polishing and prepared a particle that could respond to both electric and magnetic fields. The efficiency of electromagnetic rheological composite polishing was higher than that of single magnetic field polishing [ 21 ]. Although the ER polishing technique exhibits many advantages, it is difficult to apply ER polishing to actual machining.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrorheological Polishing Efficiency of Alumina-Doped Titanium Dioxide Particles

et al. 2023

Materials

Electrorheological (ER) polishing is a novel polishing technology having flexible and tunable characteristics. At present, ER polishing uses ER particles to drive abrasive particles to polish the material surface. Under the action of high-speed centrifugation, the abrasive particles are easily separated from ER particles due to their significantly different ER effect, and this can easily cause the degradation of polishing ability. In this work, alumina-doped titanium dioxide ER polishing particles were developed via a sol-gel method. As a classical abrasive, alumina has higher hardness and can improve the ER effect of titanium dioxide by doping. Thus, alumina-doped titanium dioxide particles simultaneously possess high ER effect and high hardness. No phase separation appears in the polishing process and the result shows that alumina-doped titanium dioxide has a good polishing efficiency for materials with Mohs hardness of 3 and below.

“…Electrorheological polishing (ERP) is an electric field-assisted polishing technique, which can use electrorheological (ER) effect to overcome the centrifugal force of abrasive rotation at high speed . ERP has advantages of high polishing efficiency, small amorphous surface polishing, and easy to combine with other machining methods to improve the machining effect. − …”

Section: Introductionmentioning

confidence: 99%

Hollow Poly(ionic liquid)/α-Al₂O₃ Composite Particles Prepared by Microwave-Assisted Pickering Emulsion Polymerization and Their Electrorheological Polishing Property

ACS Appl. Polym. Mater.

et al. 2023

In this study, we reported a kind of hollow poly(ionic liquid)/α-Al2O3 composite particles prepared by rapid microwave-assisted Pickering emulsion polymerization using the commercial high hardness α-Al2O3 abrasive (Mohs hardness = 9) as a particulate surfactant. The structure and morphology were characterized by different techniques. The as-prepared composite particles were then used as the dispersed phase of the electrorheological polishing fluid. Our results demonstrated that the hollow poly(ionic liquid) core provided dispersion stability and electrorheological effect, while the α-Al2O3 shell provided high hardness and polishing capability. Under an electric voltage of 3 kV, the polishing fluid of the hollow poly(ionic liquid)/α-Al2O3 composite particles could improve the surface quality of the stainless-steel workpiece with Mohs hardness of 5 from Ra ∼270 to ∼90 nm. This polishing performance was extraordinary and far better when compared to that of the polishing fluid consisting of a simple mixture of poly(ionic liquid) particles and α-Al2O3 particles. During polishing, the voltage, rotation speed, working gap, and polishing time were demonstrated to have an effect on polishing efficiency. This study paves the way to develop electrorheological polishing fluids with dispersion stability and high polishing efficiency by combining hollow polymer particles and high hardness of abrasives.