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Title: Subsurface mechanical damage correlations after grinding of various optical materials

Abstract

Loose abrasive grinding was performed on a wide range of optical workpiece materials [single crystals of Al 2O 3 (sapphire), SiC, Y 3Al 5O 12 (YAG), CaF 2, and LiB 3O 5 (LBO); a SiO 2-Al 2O 3-P 2O 5-Li 2O glass-ceramic (Zerodur); and glasses of SiO 2 : TiO 2 (ULE), SiO 2 (fused silica), and P 2O 5-Al 2O 3-K 2O-BaO (phosphate)]. Using the magneto rheological finishing (MRF) taper wedge technique (where a wedge was polished on each of the ground workpieces and the resulting samples were appropriately chemically etched), the subsurface mechanical damage (SSD) characteristics were measured. The SSD depth for most of the workpiece materials was found to scale as E1 1/2/ H 1, where E 1 is the elastic modulus and H 1 is the hardness of the workpiece. This material scaling is the same as that for the growth of lateral cracks, suggesting that lateral cracks are a dominant source for SSD rather than radial/median cracks, as previously proposed. Utilizing the SSD depth data from both this study and others, semiempirical relationships have been formulated, which allows for estimating the SSD depth as a function of workpiece material and important grinding parameters (such asmore » abrasive size and applied pressure).« less

Authors:
 [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1642493
Report Number(s):
LLNL-JRNL-765440
Journal ID: ISSN 0091-3286; 955208
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Optical Engineering
Additional Journal Information:
Journal Volume: 58; Journal Issue: 09; Journal ID: ISSN 0091-3286
Publisher:
SPIE
Country of Publication:
United States
Language:
English
Subject:
Abrasives; etching; crystals; glasses; magnetorheological finishing; aluminum; particles; polishing; silica; silicon carbide

Citation Formats

Suratwala, Tayyab I., Steele, William A., Wong, Lana A., and Tham, Gary C. Subsurface mechanical damage correlations after grinding of various optical materials. United States: N. p., 2019. Web. doi:10.1117/1.oe.58.9.092604.
Suratwala, Tayyab I., Steele, William A., Wong, Lana A., & Tham, Gary C. Subsurface mechanical damage correlations after grinding of various optical materials. United States. doi:10.1117/1.oe.58.9.092604.
Suratwala, Tayyab I., Steele, William A., Wong, Lana A., and Tham, Gary C. Thu . "Subsurface mechanical damage correlations after grinding of various optical materials". United States. doi:10.1117/1.oe.58.9.092604. https://www.osti.gov/servlets/purl/1642493.
@article{osti_1642493,
title = {Subsurface mechanical damage correlations after grinding of various optical materials},
author = {Suratwala, Tayyab I. and Steele, William A. and Wong, Lana A. and Tham, Gary C.},
abstractNote = {Loose abrasive grinding was performed on a wide range of optical workpiece materials [single crystals of Al2O3 (sapphire), SiC, Y3Al5O12 (YAG), CaF2, and LiB3O5 (LBO); a SiO2-Al2O3-P2O5-Li2O glass-ceramic (Zerodur); and glasses of SiO2 : TiO2 (ULE), SiO2 (fused silica), and P2O5-Al2O3-K2O-BaO (phosphate)]. Using the magneto rheological finishing (MRF) taper wedge technique (where a wedge was polished on each of the ground workpieces and the resulting samples were appropriately chemically etched), the subsurface mechanical damage (SSD) characteristics were measured. The SSD depth for most of the workpiece materials was found to scale as E11/2/H1, where E1 is the elastic modulus and H1 is the hardness of the workpiece. This material scaling is the same as that for the growth of lateral cracks, suggesting that lateral cracks are a dominant source for SSD rather than radial/median cracks, as previously proposed. Utilizing the SSD depth data from both this study and others, semiempirical relationships have been formulated, which allows for estimating the SSD depth as a function of workpiece material and important grinding parameters (such as abrasive size and applied pressure).},
doi = {10.1117/1.oe.58.9.092604},
journal = {Optical Engineering},
issn = {0091-3286},
number = 09,
volume = 58,
place = {United States},
year = {2019},
month = {4}
}

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    Works referencing / citing this record:

    Lateral cracks during sliding indentation on various optical materials
    journal, September 2019

    • Suratwala, Tayyab; Steele, Rusty; Shen, Nan
    • Journal of the American Ceramic Society, Vol. 103, Issue 2
    • DOI: 10.1111/jace.16787