Nanoscale microstructure and chemistry of transparent gahnite glass-ceramics revealed by atom probe tomography
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- Corning Research and Development Corporation, Painted Post, NY (United States)
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Energy and Environment Directorate
The nanoscale microstructure and chemistry of a transparent gahnite glass-ceramic and its precursor glass were investigated using atom probe tomography, transmission electron microscopy, and nuclear magnetic resonance spectroscopy. In the annealed precursor glass, statistically significant ZrO clustering was observed along with Si depletion within 2 nm of the ZrO clusters. This clustering is expected to be the first step in the nucleation and crystallization of the nucleating agent, ZrO2. In the glass-ceramic, gahnite (ZnAl2O4) crystallites were found to exist in proximal locations to ZrO2 and not in a core-shell arrangement. The residual glass composition was directly measured by atom probe, showing higher concentrations of Al, Zn, and Zr than previously expected. At the interfaces between the crystallites and residual glass, no enrichment or depletion zones were found. Our findings provide answers to outstanding questions surrounding the nucleation and elemental partitioning, microstructure, and the residual glass composition of transparent gahnite glass-ceramics.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); Corning Research & Development Corporation
- Grant/Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1995417
- Report Number(s):
- PNNL-SA-161776
- Journal Information:
- Scripta Materialia, Vol. 203; ISSN 1359-6462
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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