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- Title
Surface Roughness Tuning at Sub-Nanometer Level by Considering the Normal Stress Field in Magnetorheological Finishing.
- Authors
Li, Xiaoyuan; Li, Qikai; Ye, Zuoyan; Zhang, Yunfei; Ye, Minheng; Wang, Chao
- Abstract
Although magnetorheological finishing (MRF) is being widely utilized to achieve ultra-smooth optical surfaces, the mechanisms for obtaining such extremely low roughness after the MRF process are not fully understood, especially the impact of finishing stresses. Herein we carefully investigated the relationship between the stresses and surface roughness. Normal stress shows stronger impacts on the surface roughness of fused silica (FS) when compared with the shear stress. In addition, normal stress in the polishing zone was found to be sensitive to the immersion depth of the magnetorheological (MR) fluid. Based on the above, a fine tuning of surface roughness (RMS: 0.22 nm) was obtained. This work fills gaps in understanding about the stresses that influence surface roughness during MRF.
- Subjects
FINISHES &; finishing; SURFACE roughness; FUSED silica; SHEARING force
- Publication
Micromachines, 2021, Vol 12, Issue 8, p997
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi12080997