Simultaneous three-dimensional elemental mapping of Hollandite and Pyrochlore material phases in ceramic waste form materials

Damian, Peter Joseph C.; Cocco, Alex P.; Wrubel, Jacob A.; Hong, Tao; Bordia, Rajendra K.; Liu, Yijin; Pianetta, Piero; Amoroso, Jake W.; Brinkman, Kyle S.; Chiu, Wilson K.  S.

doi:10.1111/jace.16371

Title: Simultaneous three-dimensional elemental mapping of Hollandite and Pyrochlore material phases in ceramic waste form materials

Journal Article · Fri Feb 08 00:00:00 EST 2019 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/jace.16371· OSTI ID:1560673

Damian, Peter Joseph C. ^[1]; Cocco, Alex P. ^[1]; Wrubel, Jacob A. ^[1]; Hong, Tao ^[2];

^[2];

^[3]; Pianetta, Piero ^[3]; Amoroso, Jake W. ^[4];

^[2];

^[1]

Univ. of Connecticut, Storrs, CT (United States)
Clemson Univ., SC (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

In this study, differential X-ray absorption contrast tomography was performed on model ceramic composite systems to image the 3D spatial distributions of Ga and Nd containing phases. The model material systems were fabricated such that they contained two constituent phases. Ga–doped Ba hollandite (Ba_1.33Ga_2.66Ti_5.34O₁₆), and pyrochlore (Nd₂Ti₂O₇) which are under consideration as nuclear waste immobilization matrices. Two complementary techniques have been used to characterize the 3D distribution of phases. The analysis suggests that the 3D spatial distributions of hollandite and pyrochlore can be readily identified through the distributions Ga and Nd, respectively. These results represent a critical development towards characterizing the complex microstructure inherent to practical materials such as multiphase ceramic composite waste forms. Furthermore, these methods can be applied to elucidate microstructural features that fundamentally determine the performance and properties of complex systems, which is central to the design of durable waste forms as well as many other real materials such fuel cells, batteries, ultra-high temperature ceramics.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-76SF00515; NE0008260; AC09-08SR22470

OSTI ID:: 1560673

Journal Information:: Journal of the American Ceramic Society, Vol. 102, Issue 9; ISSN 0002-7820

Publisher:: American Ceramic SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
hollandite
nuclear waste
pyrochlore
waste form
X-ray computed tomography
X-ray methods

Title: Simultaneous three-dimensional elemental mapping of Hollandite and Pyrochlore material phases in ceramic waste form materials

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