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Title: Three-dimensional mapping of crystalline ceramic waste form materials

Abstract

Here, we demonstrate the use of synchrotron-based, transmission X-ray microscopy (TXM) and scanning electron microscopy to image the 3-D morphologies and spatial distributions of Ga-doped phases within model, single- and two-phase waste form material systems. Gallium doping levels consistent with those commonly used for nuclear waste immobilization (e.g., Ba1.04Cs0.24Ga2.32Ti5.68O16) could be readily imaged. This analysis suggests that a minority phase with different stoichiometry/composition from the primary hollandite phase can be formed by the solid-state ceramic processing route with varying morphology (globular vs. cylindrical) as a function of Cs content. Our results represent a crucial step in developing the tools necessary to gain an improved understanding of the microstructural and chemical properties of waste form materials that influence their resistance to aqueous corrosion. This understanding will aid in the future design of higher durability waste form materials.

Authors:
 [1];  [1];  [1];  [1];  [2];  [2];  [3];  [3];  [4];  [2]; ORCiD logo [1]
  1. Univ. of Connecticut, Storrs, CT (United States). Dept. of Mechanical Engineering
  2. Clemson Univ., SC (United States). Dept. of Materials Science and Engineering
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource
  4. Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1394065
Alternate Identifier(s):
OSTI ID: 1373824
Grant/Contract Number:  
AC02-76SF00515; NE0008260, CFA-14-6357; NE0008260; CFA-14-6357; DE‐NE0008260, CFA‐14‐6357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Volume: 100; Journal Issue: 8; Journal ID: ISSN 0002-7820
Publisher:
American Ceramic Society
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; nuclear waste; processing; scanning electron microscopy; synchrotron; transmission x-ray microscopy; x-ray computed tomography

Citation Formats

Cocco, Alex P., DeGostin, Matthew B., Wrubel, Jacob A., Damian, Peter J., Hong, Tao, Xu, Yun, Liu, Yijin, Pianetta, Piero, Amoroso, Jake W., Brinkman, Kyle S., and Chiu, Wilson K. S. Three-dimensional mapping of crystalline ceramic waste form materials. United States: N. p., 2017. Web. doi:10.1111/jace.14885.
Cocco, Alex P., DeGostin, Matthew B., Wrubel, Jacob A., Damian, Peter J., Hong, Tao, Xu, Yun, Liu, Yijin, Pianetta, Piero, Amoroso, Jake W., Brinkman, Kyle S., & Chiu, Wilson K. S. Three-dimensional mapping of crystalline ceramic waste form materials. United States. doi:10.1111/jace.14885.
Cocco, Alex P., DeGostin, Matthew B., Wrubel, Jacob A., Damian, Peter J., Hong, Tao, Xu, Yun, Liu, Yijin, Pianetta, Piero, Amoroso, Jake W., Brinkman, Kyle S., and Chiu, Wilson K. S. Fri . "Three-dimensional mapping of crystalline ceramic waste form materials". United States. doi:10.1111/jace.14885. https://www.osti.gov/servlets/purl/1394065.
@article{osti_1394065,
title = {Three-dimensional mapping of crystalline ceramic waste form materials},
author = {Cocco, Alex P. and DeGostin, Matthew B. and Wrubel, Jacob A. and Damian, Peter J. and Hong, Tao and Xu, Yun and Liu, Yijin and Pianetta, Piero and Amoroso, Jake W. and Brinkman, Kyle S. and Chiu, Wilson K. S.},
abstractNote = {Here, we demonstrate the use of synchrotron-based, transmission X-ray microscopy (TXM) and scanning electron microscopy to image the 3-D morphologies and spatial distributions of Ga-doped phases within model, single- and two-phase waste form material systems. Gallium doping levels consistent with those commonly used for nuclear waste immobilization (e.g., Ba1.04Cs0.24Ga2.32Ti5.68O16) could be readily imaged. This analysis suggests that a minority phase with different stoichiometry/composition from the primary hollandite phase can be formed by the solid-state ceramic processing route with varying morphology (globular vs. cylindrical) as a function of Cs content. Our results represent a crucial step in developing the tools necessary to gain an improved understanding of the microstructural and chemical properties of waste form materials that influence their resistance to aqueous corrosion. This understanding will aid in the future design of higher durability waste form materials.},
doi = {10.1111/jace.14885},
journal = {Journal of the American Ceramic Society},
number = 8,
volume = 100,
place = {United States},
year = {2017},
month = {4}
}

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