Effects of functional alkali in magnetorheological finishing fluid

Zhang, Yunfei; Wang, Lili; Li, Xiaoyuan; Liu, Jia‐Bao; Ye, Zuoyan; Tian, Dong; Huang, Wen; Yu, Miao; Ye, Minheng; Wang, Chao

doi:10.1088/1361-665x/abc837

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…In fact, as the potassium dihydrogen phosphate crystals are extremely soluble in water, the magnetorheological fluid carrier liquid must be nonaqueous [ 216 ]. For polishing fused silica, alkaline additives in the magnetorheological fluid can achieve a higher material removal rate and finishing quality simultaneously, due to the zeta potential adjustment generated by the pH enhancement of magnetorheological fluid [ 217 ]. When polishing BK7 optical glass, the soft magnetic carbonyl iron (CI) particles were coated with polymethyl methacrylate (PMMA).…”

Section: Non-modification Polishing Approachesmentioning

confidence: 99%

Polishing Approaches at Atomic and Close-to-Atomic Scale

2023

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Roughness down to atomic and close-to-atomic scale is receiving an increasing attention in recent studies of manufacturing development, which can be realized by high-precision polishing processes. This review presents polishing approaches at atomic and close-to-atomic scale on planar and curved surfaces, including chemical mechanical polishing, plasma-assisted polishing, catalyst-referred etching, bonnet polishing, elastic emission machining, ion beam figuring, magnetorheological finishing, and fluid jet polishing. These polishing approaches are discussed in detail in terms of removal mechanisms, polishing systems, and industrial applications. The authors also offer perspectives for future studies to address existing and potential challenges and promote technological progress.

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Section: Non-modification Polishing Approachesmentioning

confidence: 99%

Polishing Approaches at Atomic and Close-to-Atomic Scale

2023

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“…Ultrasonic vibration 5 – 7 , Non-resonant vibration 8 and chemical action 9 – 12 are introduced into the MR polishing process, which can significantly improve the material removal rate and polished surface quality. However, there are few studies on improving the material removal rate by changing the MR fluid temperature.…”

Section: Introductionmentioning

confidence: 99%

Study on mechanism of improving efficiency of permanent-magnet small ball-end magnetorheological polishing by increasing magnetorheological fluid temperature

Tian

Chen

Liu

et al. 2022

Sci Rep

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Permanent-magnet small ball-end magnetorheological polishing method can be used to polish the small part with complex structure. However, the material removal rate of this method is low, which is difficult to improve the output and reduce the cost. In this research, the effect of magnetorheological fluid temperature on the material removal rate is theoretically analyzed by measuring the effect of temperature on the flow properties of magnetorheological fluid, establishing the hydrodynamic model of polishing zone and solving the material removal parameters. It is found that with the increase of the magnetorheological fluid temperature, the polishing relative velocity increases accordingly, which can promote the improvement of material removal rate. But the shear stress decreases accordingly, which inhibits the improvement of material removal rate. The verification experiment results show that the promoting effect can exceeds the inhibitory effect, so that the material removal rate increases with the increase of magnetorheological fluid temperature. When the magnetorheological fluid temperature increases to 60 °C, the material removal rate is improved by 108.4% and the polished surface roughness Sa can reach 14.9 nm. Therefore, increasing the magnetorheological fluid temperature can significantly improve the efficiency of permanent-magnet small ball-end magnetorheological polishing and obtain high quality polished surface.

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“…In our previous work, the ceria abrasives in MRF fluid were found to agglomerate to nearly four times of their original size. 20 Up to date, to the best of our knowledge, the influence of abrasive agglomeration on MRR in MRF is rarely discussed.…”

Section: Introductionmentioning

confidence: 99%

Effects of nanoscale abrasive agglomeration on material removal in magnetorheological finishing

et al. 2021

J Am Ceram Soc.

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Magnetorheological finishing (MRF) is a main technology to achieve super smooth surfaces of ultra-precision optics. Although the nanoscale abrasives in MRF fluid are agglomerated to various extents, such effects on material removal in MRF are seldom discussed. Herein, the agglomeration of the nanodiamond (ND) abrasive on material removal rate (MRR) of MRF is studied by both experimental and molecular dynamic simulation (MDS) pathways. The agglomeration degrees of ND abrasives are being characterized by the hydrodynamic scattering method. The number of removed atoms by a single agglomerated ND abrasive is calculated by the MDS. Then by using a novel active abrasive contact sites model, the simulated MRR of fused silica (FS) can be obtained. Theoretical calculated MRRs compare well with the experimental MRF results. This work provides an insight into controlled nanoscale material removal and atomic adhesion friction mechanism in MRF.

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Effects of functional alkali in magnetorheological finishing fluid

Cited by 8 publications

References 14 publications

Polishing Approaches at Atomic and Close-to-Atomic Scale

Polishing Approaches at Atomic and Close-to-Atomic Scale

Study on mechanism of improving efficiency of permanent-magnet small ball-end magnetorheological polishing by increasing magnetorheological fluid temperature

Effects of nanoscale abrasive agglomeration on material removal in magnetorheological finishing

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