Journal
NANOMATERIALS
Volume 11, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/nano11102541
Keywords
nanocrystalline; ultrafine; thermal stability; in-situ TEM; stagnation
Categories
Funding
- Laboratory Directed Research and Development program of Los Alamos National Laboratory
- DOE Integrated University Program Graduate Fellowship
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This study highlights the limitations of thermal stability analysis using in-situ transmission electron microscopy (TEM)-annealing experiments on ultrafine and nanocrystalline materials. By comparing in-situ TEM experiments with bulk material annealing experiments on nanocrystalline pure copper and HT-9 steel, they found different outcomes for pure copper but similar results for HT-9 steel. The discussion focuses on the necessity of comparing in-situ TEM annealing experimental results to bulk annealing for material thermal stability assessment.
This work highlights some limitations of thermal stability analysis via in-situ transmission electron microscopy (TEM)-annealing experiments on ultrafine and nanocrystalline materials. We provide two examples, one on nanocrystalline pure copper and one on nanocrystalline HT-9 steel, where in-situ TEM-annealing experiments are compared to bulk material annealing experiments. The in-situ TEM and bulk annealing experiments demonstrated different results on pure copper but similar output in the HT-9 steel. The work entails discussion of the results based on literature theoretical concepts, and expound on the inevitability of comparing in-situ TEM annealing experimental results to bulk annealing when used for material thermal stability assessment.
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