Expedited spark plasma sintering of high‐density uranium mononitride pellet utilizing U<sub>2</sub>N<sub>3</sub> powder
Cited 0 times inCited 0 times in
- Expedited spark plasma sintering of high‐density uranium mononitride pellet utilizing U2</sub>N3</sub> powder
- Ahn, Jungsu; Kim, Geon; Nam, Changhyeon; Ha, Woong; Ahn, Sangjoon
- Issue Date
- American Ceramic Society
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY
- The feasibility of a non-stoichiometric synthesis strategy for uranium mononitride (UN) pellet fabrication is experimentally verified with spark plasma sintering of U2N3 powder in this study. The method removes the denitride process (reduction of U2N3 to UN powder) from the conventional UN pellet fabrication, and it still successfully provided near-perfect UN stoichiometry and high density (94 %TD). During the spark plasma sintering of U2N3 powder, vacuum pressure increase and powder height, decrease were concurrently measured above ∼1173 K, which indicates the nitrogen gas emission and higher density UN powder formation from the in-situ decomposition of lower-density U2N3 powder. The X-ray diffraction (XRD) analysis on the sintered pellets obtained directly from U2N3 powder showed an excellent match with the existing XRD reference data of UN. The measured density of U2N3-sintered UN pellets was higher (85 %TD) than that of UN-sintered UN pellets (79 %TD) at relatively low sintering temperature (1773 K). With a higher sintering temperature of 2073 K, high pellet densities (94 %TD) were obtained from both U2N3 and UN powders.
- Appears in Collections:
- NUE_Journal Papers
- Files in This Item:
- There are no files associated with this item.
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.