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Crystallographic ch...
Crystallographic characterization of U 2 CrN 3 : A neutron diffraction and transmission electron microscopy approach
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- Patnaik, Sobhan (author)
- KTH,Kärnenergiteknik,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH)
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- Mishchenko, Yulia (author)
- KTH,Kärnenergiteknik,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH)
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- Stansby, Jennifer (author)
- University of New South Wales (UNSW),University of New South Wales, Sydney, Australia
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- Fazi, Andrea, 1992 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Göteborg, Sweden
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- Peterson, Vanessa (author)
- Australian Nuclear Science and Technology Organisation,Australian Nuclear Science and Technology Organization, Lucas Heights, Australia
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- Jädernäs, Daniel (author)
- Studsvik,Studsvik Nuclear AB, Nyköping, Sweden
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- Thuvander, Mattias, 1968 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Göteborg, Sweden
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- Johnson, Kyle D. (author)
- Studsvik,Studsvik Nuclear AB, Nyköping, Sweden
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- Obbard, E. (author)
- University of New South Wales (UNSW),University of New South Wales, Sydney, Australia
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- Lopes, Denise Adorno (author)
- KTH,Kärnenergiteknik,Westinghouse Electric Sweden AB, Västerås, Sweden,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH)
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(creator_code:org_t)
- Elsevier BV, 2023
- 2023
- English.
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In: Nuclear Materials and Energy. - : Elsevier BV. - 2352-1791. ; 35
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Abstract
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- In 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.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
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Patnaik, Sobhan
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Mishchenko, Yuli ...
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Stansby, Jennife ...
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Fazi, Andrea, 19 ...
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Peterson, Vaness ...
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Jädernäs, Daniel
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Thuvander, Matti ...
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Johnson, Kyle D.
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Obbard, E.
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Lopes, Denise Ad ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Inorganic Chemis ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
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and Metallurgy and M ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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Nuclear Material ...
- By the university
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Chalmers University of Technology
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Royal Institute of Technology