Abstract
We describe the anisotropy in the material removal rate (MRR) of the polycrystalline, chemical-vapor deposited zinc sulfide (ZnS). We define the polycrystalline anisotropy via microhardness and chemical erosion tests for four crystallographic orientations of ZnS: (100), (110), (111), and (311). Anisotropy in the MRR was studied under magnetorheological finishing (MRF) conditions. Three chemically and mechanically modified magnetorheological (MR) fluids at pH values of 4, 5, and 6 were used to test the MRR variations among the four single-crystal planes. When polishing the single-crystal planes and the polycrystalline with pH 5 and pH 6 MR fluids, variations were found in the MRR among the four single-crystal planes and surface artifacts were observed on the polycrystalline material. When polishing the single-crystal planes and the polycrystalline with the modified MR fluid at pH 4, however, minimal variation was observed in the MRR among the four orientations and a reduction in surface artifacts was achieved on the polycrystalline material.
© 2016 Optical Society of America
Full Article | PDF ArticleMore Like This
S. Salzman, H. J. Romanofsky, G. West, K. L. Marshall, S. D. Jacobs, and J. C. Lambropoulos
Appl. Opt. 55(30) 8448-8456 (2016)
Irina A. Kozhinova, Henry J. Romanofsky, Alexander Maltsev, Stephen D. Jacobs, William I. Kordonski, and Sergei R. Gorodkin
Appl. Opt. 44(22) 4671-4677 (2005)
Shai N. Shafrir, Henry J. Romanofsky, Michael Skarlinski, Mimi Wang, Chunlin Miao, Sivan Salzman, Taylor Chartier, Joni Mici, John C. Lambropoulos, Rui Shen, Hong Yang, and Stephen D. Jacobs
Appl. Opt. 48(35) 6797-6810 (2009)