Acidic magnetorheological finishing of infrared polycrystalline materials

Salzman, S.; Romanofsky, H. J.; West, G.; Marshall, K. L.; Jacobs, S. D.; Lambropoulos, J. C.

doi:10.1364/AO.55.008448

Title: Acidic magnetorheological finishing of infrared polycrystalline materials

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Abstract

Here, chemical-vapor–deposited (CVD) ZnS is an example of a polycrystalline material that is difficult to polish smoothly via the magnetorheological–finishing (MRF) technique. When MRF-polished, the internal infrastructure of the material tends to manifest on the surface as millimeter-sized “pebbles,” and the surface roughness observed is considerably high. The fluid’s parameters important to developing a magnetorheological (MR) fluid that is capable of polishing CVD ZnS smoothly were previously discussed and presented. These parameters were acidic pH (~4.5) and low viscosity (~47 cP). MRF with such a unique MR fluid was shown to reduce surface artifacts in the form of pebbles; however, surface microroughness was still relatively high because of the absence of a polishing abrasive in the formulation. In this study, we examine the effect of two polishing abrasives—alumina and nanodiamond—on the surface finish of several CVD ZnS substrates, and on other important IR polycrystalline materials that were finished with acidic MR fluids containing these two polishing abrasives. Surface microroughness results obtained were as low as ~28 nm peak-to-valley and ~6-nm root mean square.

Authors:

Salzman, S. ^[1]; Romanofsky, H. J. ^[1]; West, G. ^[1]; Marshall, K. L. ^[1]; Jacobs, S. D. ^[1]; Lambropoulos, J. C. ^[1]

Univ. of Rochester, Rochester, NY (United States)

Publication Date:: Wed Oct 12 00:00:00 EDT 2016

Research Org.:: Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1328775

Alternate Identifier(s):: OSTI ID: 1328810

Grant/Contract Number:: NA0001944

Resource Type:: Accepted Manuscript

Journal Name:: Applied Optics

Additional Journal Information:: Journal Volume: 55; Journal Issue: 30; Journal ID: ISSN 0003-6935

Publisher:: Optical Society of America (OSA)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; polishing; optics at surfaces; roughness; optical fabrication

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                    Salzman, S., Romanofsky, H. J., West, G., Marshall, K. L., Jacobs, S. D., and Lambropoulos, J. C. Acidic magnetorheological finishing of infrared polycrystalline materials.  United States: N. p., 2016. 
Web.  doi:10.1364/AO.55.008448.

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                    Salzman, S., Romanofsky, H. J., West, G., Marshall, K. L., Jacobs, S. D., & Lambropoulos, J. C. Acidic magnetorheological finishing of infrared polycrystalline materials.  United States.  https://doi.org/10.1364/AO.55.008448

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                    Salzman, S., Romanofsky, H. J., West, G., Marshall, K. L., Jacobs, S. D., and Lambropoulos, J. C. Wed .  
"Acidic magnetorheological finishing of infrared polycrystalline materials".  United States.  https://doi.org/10.1364/AO.55.008448.  https://www.osti.gov/servlets/purl/1328775.

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@article{osti_1328775,

  title        = {Acidic magnetorheological finishing of infrared polycrystalline materials},

  author       = {Salzman, S. and Romanofsky, H. J. and West, G. and Marshall, K. L. and Jacobs, S. D. and Lambropoulos, J. C.},

  abstractNote = {Here, chemical-vapor–deposited (CVD) ZnS is an example of a polycrystalline material that is difficult to polish smoothly via the magnetorheological–finishing (MRF) technique. When MRF-polished, the internal infrastructure of the material tends to manifest on the surface as millimeter-sized “pebbles,” and the surface roughness observed is considerably high. The fluid’s parameters important to developing a magnetorheological (MR) fluid that is capable of polishing CVD ZnS smoothly were previously discussed and presented. These parameters were acidic pH (~4.5) and low viscosity (~47 cP). MRF with such a unique MR fluid was shown to reduce surface artifacts in the form of pebbles; however, surface microroughness was still relatively high because of the absence of a polishing abrasive in the formulation. In this study, we examine the effect of two polishing abrasives—alumina and nanodiamond—on the surface finish of several CVD ZnS substrates, and on other important IR polycrystalline materials that were finished with acidic MR fluids containing these two polishing abrasives. Surface microroughness results obtained were as low as ~28 nm peak-to-valley and ~6-nm root mean square.},

  doi          = {10.1364/AO.55.008448},

  journal      = {Applied Optics},

  number       = 30,

  volume       = 55,

  place        = {United States},

  year         = {Wed Oct 12 00:00:00 EDT 2016},

  month        = {Wed Oct 12 00:00:00 EDT 2016}

}

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