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Title: Non-destructive characterization of corroded glass surfaces by spectroscopic ellipsometry

Abstract

Characterization of the alteration layers that form on glass surfaces during corrosion processes provides valuable information on both the mechanisms and rate of glass alteration. In recent years, state-of-the-art materials and surface characterization techniques have been employed to study various aspects of the alteration layers that result from corrosion. In most cases, these techniques are destructive and thus can only be employed at the end of the corrosion experiment. We show that the alteration layers can be investigated by non-destructive spectroscopic ellipsometry (SE), which provides pertinent information on alteration layer thickness, morphology, and, through correlation of the index of refraction, porosity. SE measurements of silicate glass coupons altered in aqueous solutions of pH 3, 5, 7, 9, and 11 at 90 °C for 7 days are compared to cross-sectional secondary electron microscopy images. In most cases, quantitative agreement of the alteration layer thickness is obtained. The fractional porosity calculated from the index of refraction is lower than the porosity calculated from elemental analysis of the aqueous solutions, indicating that the alteration layer has compacted during corrosion or the subsequent supercritical CO 2 drying process. Our results confirm the utility of performing non-destructive SE measurements on corroded glass surfaces.

Authors:
 [1];  [2];  [1];  [3]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Washington State Univ., Pullman, WA (United States). Dept. of Chemistry; Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Washington State Univ., Pullman, WA (United States). Dept. of Chemistry
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1413461
Report Number(s):
PNNL-SA-126511
Journal ID: ISSN 0022-3093; PII: S002230931730580X; TRN: US1800433
Grant/Contract Number:  
AC0576RL01830
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Non-Crystalline Solids
Additional Journal Information:
Journal Volume: 481; Journal Issue: C; Journal ID: ISSN 0022-3093
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; corrosion; vitrification; silicate glass; spectroscopic ellipsometry; porosity

Citation Formats

Kaspar, Tiffany C., Reiser, Joelle T., Ryan, Joseph V., and Wall, Nathalie A. Non-destructive characterization of corroded glass surfaces by spectroscopic ellipsometry. United States: N. p., 2017. Web. doi:10.1016/J.JNONCRYSOL.2017.10.054.
Kaspar, Tiffany C., Reiser, Joelle T., Ryan, Joseph V., & Wall, Nathalie A. Non-destructive characterization of corroded glass surfaces by spectroscopic ellipsometry. United States. doi:10.1016/J.JNONCRYSOL.2017.10.054.
Kaspar, Tiffany C., Reiser, Joelle T., Ryan, Joseph V., and Wall, Nathalie A. Fri . "Non-destructive characterization of corroded glass surfaces by spectroscopic ellipsometry". United States. doi:10.1016/J.JNONCRYSOL.2017.10.054.
@article{osti_1413461,
title = {Non-destructive characterization of corroded glass surfaces by spectroscopic ellipsometry},
author = {Kaspar, Tiffany C. and Reiser, Joelle T. and Ryan, Joseph V. and Wall, Nathalie A.},
abstractNote = {Characterization of the alteration layers that form on glass surfaces during corrosion processes provides valuable information on both the mechanisms and rate of glass alteration. In recent years, state-of-the-art materials and surface characterization techniques have been employed to study various aspects of the alteration layers that result from corrosion. In most cases, these techniques are destructive and thus can only be employed at the end of the corrosion experiment. We show that the alteration layers can be investigated by non-destructive spectroscopic ellipsometry (SE), which provides pertinent information on alteration layer thickness, morphology, and, through correlation of the index of refraction, porosity. SE measurements of silicate glass coupons altered in aqueous solutions of pH 3, 5, 7, 9, and 11 at 90 °C for 7 days are compared to cross-sectional secondary electron microscopy images. In most cases, quantitative agreement of the alteration layer thickness is obtained. The fractional porosity calculated from the index of refraction is lower than the porosity calculated from elemental analysis of the aqueous solutions, indicating that the alteration layer has compacted during corrosion or the subsequent supercritical CO2 drying process. Our results confirm the utility of performing non-destructive SE measurements on corroded glass surfaces.},
doi = {10.1016/J.JNONCRYSOL.2017.10.054},
journal = {Journal of Non-Crystalline Solids},
number = C,
volume = 481,
place = {United States},
year = {Fri Nov 03 00:00:00 EDT 2017},
month = {Fri Nov 03 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 3, 2018
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Cited by: 1 work
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