Crystallographic characterization of U2CrN3: a neutron diffraction and transmission electron microscopy approach

Simple item page
dc.contributor.authorPatnaik, Sen_AU
dc.contributor.authorMishchenko, Yen_AU
dc.contributor.authorStansby, JHen_AU
dc.contributor.authorFazi, Aen_AU
dc.contributor.authorPeterson, VKen_AU
dc.contributor.authorJädernäs, Den_AU
dc.contributor.authorThuvander, Men_AU
dc.contributor.authorJohnson, KDen_AU
dc.contributor.authorObbard, EGen_AU
dc.contributor.authorLopes, DAen_AU
dc.date.accessioned2024-10-04T00:19:06Zen_AU
dc.date.available2024-10-04T00:19:06Zen_AU
dc.date.issued2023-06en_AU
dc.date.statistics2024-09-11en_AU
dc.description.abstractIn this study, neutron diffraction and transmission electron microscopy (TEM) have been implemented to study the crystallographic structure of the ternary phase U2CrN3 from pellet to nano scale respectively. Recently microstructural evaluation of this ternary phase has been performed for the first time in pellet condition, overcoming the Cr evaporation issue during the conventional sintering process. In this work for the first time, the crystallographic structure of the ordered ternary U2CrN3 phase, stabilized in pellet condition, has been obtained by implementing neutron diffraction. For this study, pellets of the composite material UN with 20 vol% CrN were fabricated by powder metallurgy by mixing UN and CrN powders followed by Spark Plasma Sintering (SPS). TEM was used to investigate the nanoscale structure with a thin lamella of the order of 100–140 nm produced by focused ion beam (FIB). The neutron data revealed the phase composition of the pellet to be primarily 54(8) wt.% U2CrN3, in good agreement with the stoichiometry of starting reagents (UN and CrN powder) and metallographic analysis. Neutron data analysis confirms that all the crystallographic sites in U2CrN3 phase are fully occupied reinforcing the fully stoichiometric composition of this phase, however, the position of the N at the 4i site was found to be closer to the Cr than previously thought. TEM and selected area electron diffraction rendered nano-level information and revealed the presence of nano domains along grain boundaries of UN and U2CrN3, indicating a formation mechanism of the ternary phase, where the phase likely nucleates as nano domains in UN grains from migration of Cr. © 2023 The Author(s). Published by Elsevier Ltd. Open access article under the CC BY licence.en_AU
dc.description.sponsorshipFinancial support for carrying out this research from The Swedish Strategic Research Foundation (SSF) within the SAFETY-project is gratefully acknowledged by the authors. We are thankful to Mirva Eriksson from the National Spark Plasma Sintering (SPS) facility at Stockholm University, Gunilla Herting from the Division of Surface and Corrosion Science at KTH. The authors also wish to acknowledge that TEM analysis was conducted at Chalmers Materials Laboratory (CMAL) at Chalmers University of Technology.en_AU
dc.identifier.articlenumber101441en_AU
dc.identifier.citationPatnaik, S., Mishchenko, Y., Stansby, J. H., Fazi, A., Peterson, V. K., Jädernäs, D., Thuvander, M., Johnson, K. D., Obbard, E. G., & Lopes, D. A. (2023). Crystallographic characterization of U2CrN3: a neutron diffraction and transmission electron microscopy approach. Nuclear Materials and Energy, 35, 101441. doi:10.1016/j.nme.2023.101441en_AU
dc.identifier.issn2352-1791en_AU
dc.identifier.journaltitleNuclear Materials and Energyen_AU
dc.identifier.urihttps://doi.org/10.1016/j.nme.2023.101441en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15727en_AU
dc.identifier.volume35en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectElectron microscopesen_AU
dc.subjectNitrogenen_AU
dc.subjectChromiumen_AU
dc.subjectUraniumen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectCrystallographyen_AU
dc.subjectMetallurgyen_AU
dc.subjectMetallographyen_AU
dc.subjectNeutronsen_AU
dc.subjectStoichiometryen_AU
dc.titleCrystallographic characterization of U2CrN3: a neutron diffraction and transmission electron microscopy approachen_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.66 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles