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Three‐dimensional mapping of crystalline ceramic waste form materials
Author(s) -
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.
Publication year - 2017
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14885
Subject(s) - ceramic , materials science , phase (matter) , scanning electron microscope , transmission electron microscopy , radioactive waste , microstructure , hollandite , doping , characterization (materials science) , synchrotron , durability , chemical engineering , mineralogy , metallurgy , composite material , nanotechnology , nuclear chemistry , optics , chemistry , organic chemistry , optoelectronics , physics , engineering
This work demonstrates 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., Ba 1.04 Cs 0.24 Ga 2.32 Ti 5.68 O 16 ) could be readily imaged. The 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. The results presented in this work 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.