title: Zirconia-coated carbonyl-iron-particle-based magnetorheological fluid for polishing optical glasses and ceramics.
abstract: We report on magnetorheological finishing (MRF) spotting experiments performed on glasses and ceramics using a zirconia-coated carbonyl-iron (CI)-particle-based magnetorheological (MR) fluid. The zirconia-coated magnetic CI particles were prepared via sol-gel synthesis in kilogram quantities. The coating layer was approximately 50-100 nm thick, faceted in surface structure, and well adhered. Coated particles showed long-term stability against aqueous corrosion. "Free" nanocrystalline zirconia polishing abrasives were cogenerated in the coating process, resulting in an abrasive-charged powder for MRF. A viable MR fluid was prepared simply by adding water. Spot polishing tests were performed on a variety of optical glasses and ceramics over a period of nearly three weeks with no signs of MR fluid degradation or corrosion. Stable material removal rates and smooth surfaces inside spots were obtained.
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, 240 East River Road,Rochester, New York 14623, USA. shai.shafrir@rochester.edu
authors.forename: Shai N
authors.initials: SN
authors.lastname: Shafrir
authors.forename: Henry J
authors.initials: HJ
authors.lastname: Romanofsky
authors.forename: Michael
authors.initials: M
authors.lastname: Skarlinski
authors.forename: Mimi
authors.initials: M
authors.lastname: Wang
authors.forename: Chunlin
authors.initials: C
authors.lastname: Miao
authors.forename: Sivan
authors.initials: S
authors.lastname: Salzman
authors.forename: Taylor
authors.initials: T
authors.lastname: Chartier
authors.forename: Joni
authors.initials: J
authors.lastname: Mici
authors.forename: John C
authors.initials: JC
authors.lastname: Lambropoulos
authors.forename: Rui
authors.initials: R
authors.lastname: Shen
authors.forename: Hong
authors.initials: H
authors.lastname: Yang
authors.forename: Stephen D
authors.initials: SD
authors.lastname: Jacobs