Size-dependent microstructures in rapidly solidified uranium-niobium powder particles
Abstract
The microstructures of rapidly solidified U-6wt%Nb powder particles synthesized by centrifugal atomization were characterized using scanning electron microscopy and transmission electron microscopy. Observed variations in microstructure are related to particle sizes. All of the powder particles exhibited a two-zone microstructure. The formation of this two-zone microstructure is described by a transition from solidification controlled by internal heat flow and high solidification rate during recalescence (micro-segregation-free or partitionless growth) to solidification controlled by external heat flow with slower solidification rates (dendritic growth with solute redistribution). The extent of partitionless solidification increased with decreasing particle size due to larger undercoolings in smaller particles prior to solidification. The metastable phases that formed are related to variations in Nb concentration across the particles. Lastly, the microstructures of the powders were heavily twinned.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Korea Atomic Energy Research Institute, Daejeon (Republic of Korea)
- Korea Advanced Institute of Science and Technology, Daejeon (Republic of Korea)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1297650
- Alternate Identifier(s):
- OSTI ID: 1326700
- Report Number(s):
- LLNL-JRNL-679130
Journal ID: ISSN 0022-3115
- Grant/Contract Number:
- AC52-07NA27344; 13-SI-002
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 479; Journal Issue: C; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 11 NUCLEAR FUEL CYCLE AND RUEL MATERIALS; powder processing; alloys; rapid solidification; solidification microstructure
Citation Formats
McKeown, Joseph T., Hsiung, Luke L., Park, Jong M., Ryu, Ho J., Turchi, Patrice E. A., and King, Wayne E. Size-dependent microstructures in rapidly solidified uranium-niobium powder particles. United States: N. p., 2016.
Web. doi:10.1016/j.jnucmat.2016.06.023.
McKeown, Joseph T., Hsiung, Luke L., Park, Jong M., Ryu, Ho J., Turchi, Patrice E. A., & King, Wayne E. Size-dependent microstructures in rapidly solidified uranium-niobium powder particles. United States. https://doi.org/10.1016/j.jnucmat.2016.06.023
McKeown, Joseph T., Hsiung, Luke L., Park, Jong M., Ryu, Ho J., Turchi, Patrice E. A., and King, Wayne E. 2016.
"Size-dependent microstructures in rapidly solidified uranium-niobium powder particles". United States. https://doi.org/10.1016/j.jnucmat.2016.06.023. https://www.osti.gov/servlets/purl/1297650.
@article{osti_1297650,
title = {Size-dependent microstructures in rapidly solidified uranium-niobium powder particles},
author = {McKeown, Joseph T. and Hsiung, Luke L. and Park, Jong M. and Ryu, Ho J. and Turchi, Patrice E. A. and King, Wayne E.},
abstractNote = {The microstructures of rapidly solidified U-6wt%Nb powder particles synthesized by centrifugal atomization were characterized using scanning electron microscopy and transmission electron microscopy. Observed variations in microstructure are related to particle sizes. All of the powder particles exhibited a two-zone microstructure. The formation of this two-zone microstructure is described by a transition from solidification controlled by internal heat flow and high solidification rate during recalescence (micro-segregation-free or partitionless growth) to solidification controlled by external heat flow with slower solidification rates (dendritic growth with solute redistribution). The extent of partitionless solidification increased with decreasing particle size due to larger undercoolings in smaller particles prior to solidification. The metastable phases that formed are related to variations in Nb concentration across the particles. Lastly, the microstructures of the powders were heavily twinned.},
doi = {10.1016/j.jnucmat.2016.06.023},
url = {https://www.osti.gov/biblio/1297650},
journal = {Journal of Nuclear Materials},
issn = {0022-3115},
number = C,
volume = 479,
place = {United States},
year = {Tue Jun 14 00:00:00 EDT 2016},
month = {Tue Jun 14 00:00:00 EDT 2016}
}
Web of Science
Works referenced in this record:
Pressure build-up at the metal delivery tube orifice in ultrasonic gas atomization
journal, July 1988
- Baram, J. C.; Veistinen, M. K.; Lavernia, E. J.
- Journal of Materials Science, Vol. 23, Issue 7
Phases metastables dans les alliages uranium-niobium
journal, January 1964
- Anagnostidis, M.; Colombié, M.; Monti, H.
- Journal of Nuclear Materials, Vol. 11, Issue 1
Metastable phases in uranium alloys with high solute solubility in the BCC gamma phase. Part I — the system U-Nb
journal, January 1965
- Tangri, K.; Chaudhuri, D. K.
- Journal of Nuclear Materials, Vol. 15, Issue 4
Phase transformations in a uranium + 14 at.% niobium alloy
journal, March 1980
- Vandermeer, R. A.
- Acta Metallurgica, Vol. 28, Issue 3
The effect of quench rate on the microstructure, mechanical properties, and corrosion behavior of U-6 wt pct Nb
journal, July 1984
- Eckelmeyer, K. H.; Romig, A. D.; Weirick, L. J.
- Metallurgical Transactions A, Vol. 15, Issue 7
Martensitic structures and deformation twinning in the U–Nb shape-memory alloys
journal, July 2001
- Field, R. D.; Thoma, D. J.; Dunn, P. S.
- Philosophical Magazine A, Vol. 81, Issue 7
Crystallographic and kinetic origins of acicular and banded microstructures in U–Nb alloys
journal, May 2013
- Field, R. D.; Thoma, D. J.
- Journal of Nuclear Materials, Vol. 436, Issue 1-3
Rapidly solidified U–6wt%Nb powders for dispersion-type nuclear fuels
journal, May 2014
- McKeown, Joseph T.; Hsiung, Luke L.; Ryu, Ho Jin
- Journal of Nuclear Materials, Vol. 448, Issue 1-3
Crystal structures of transition phases formed in U/16.60 at% Nb/5.64 at% Zr alloys
journal, December 1969
- Yakel, Harry L.
- Journal of Nuclear Materials, Vol. 33, Issue 3
Metastable phases in the uranium molybdenum system and their origin
journal, July 1961
- Tangri, K.; Williams, G. I.
- Journal of Nuclear Materials, Vol. 4, Issue 2
The orientation relationship between the gamma and alpha structures in uranium-zirconium alloys
journal, May 1966
- Hatt, B. A.
- Journal of Nuclear Materials, Vol. 19, Issue 2
Characterization of U-2 wt% Mo and U-10 wt% Mo alloy powders prepared by centrifugal atomization
journal, June 1997
- Kim, Ki Hwan; Lee, Don Bac; Kim, Chang Kyu
- Journal of Nuclear Materials, Vol. 245, Issue 2-3
Use of a Centrifugal Atomization Process in the Development of Research Reactor fuel
journal, October 2007
- Kim, Chang-Kyu; Park, Jong-Man; Ryu, Ho-Jin
- Nuclear Engineering and Technology, Vol. 39, Issue 5
Microstructural variations in rapidly solidified alloys
journal, February 1988
- Boettinger, William J.
- Materials Science and Engineering, Vol. 98
Solidification reactions in undercooled alloys
journal, May 1994
- Perepezko, J. H.
- Materials Science and Engineering: A, Vol. 179-180
Atomic number and crystallographic contrast images with the SEM: a review of backscattered electron techniques
journal, March 1987
- Lloyd, Geoffrey E.
- Mineralogical Magazine, Vol. 51, Issue 359
Z-contrast stem for materials science
journal, June 1989
- Pennycook, S. J.
- Ultramicroscopy, Vol. 30, Issue 1-2
Quantitative X-ray microanalysis of uranium alloys with the analytical electron microscope
journal, August 1984
- Romig, A. D.
- Journal of Microscopy, Vol. 135, Issue 2
Heat exchange between metal particles and gas in the atomization process
journal, July 1968
- Nichiporenko, O. S.; Naida, Yu. I.
- Soviet Powder Metallurgy and Metal Ceramics, Vol. 7, Issue 7
The Nb-U (Niobium-Uranium) system
journal, June 1998
- Koike, J.; Kassner, M. E.; Tate, R. E.
- Journal of Phase Equilibria, Vol. 19, Issue 3
An analysis of the microstructure of rapidly solidified Al-8 wt pct Fe powder
journal, May 1986
- Boettinger, W. J.; Bendersky, L.; Early, J. G.
- Metallurgical Transactions A, Vol. 17, Issue 5
The correlation between superheating and supercooling in CdTe melts during unseeded bridgman growth
journal, March 1993
- Mühlberg, M.; Rudolph, P.; Laasch, M.
- Journal of Crystal Growth, Vol. 128, Issue 1-4
The effect of various thermal treatments on supercooling of PbTe melts
journal, November 1995
- Koh, H. J.; Rudolph, P.; Schäfer, N.
- Materials Science and Engineering: B, Vol. 34, Issue 2-3
The crystal perfection depends on the superheating of the mother phase too — experimental facts and speculations on the “melt structure” of semiconductor compounds
journal, September 1996
- Rudolph, P.; Koh, H. J.; Schäfer, N.
- Journal of Crystal Growth, Vol. 166, Issue 1-4
Undercooling and metastable phase formation in a Bi95Sb5 melt
journal, September 2000
- Zhou, Z.; Wang, W.; Sun, L.
- Applied Physics A Materials Science & Processing, Vol. 71, Issue 3
Dependence of crystal nucleation on prior liquid overheating by differential fast scanning calorimeter
journal, March 2014
- Yang, Bin; Perepezko, John H.; Schmelzer, Jürn W. P.
- The Journal of Chemical Physics, Vol. 140, Issue 10
The rapid solidification processing of materials: science, principles, technology, advances, and applications
journal, December 2009
- Lavernia, Enrique J.; Srivatsan, T. S.
- Journal of Materials Science, Vol. 45, Issue 2, p. 287-325
Containerless solidification of alloys in a drop-tube
journal, February 1988
- Cochrane, R. F.; Evans, P. V.; Greer, A. L.
- Materials Science and Engineering, Vol. 98
The thermodynamics of the surfaces of solutions
journal, March 1932
- Butler, John Alfred Valentine
- Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, Vol. 135, Issue 827, p. 348-375
The thermodynamics of interfaces in systems of several components
journal, January 1940
- Guggenheim, E. A.
- Transactions of the Faraday Society, Vol. 35
Size effect on surface tension of liquid binary alloy droplets
journal, April 2012
- Liu, L.; Wang, T. H.; Li, J. C.
- Solid State Communications, Vol. 152, Issue 7
Kinetics of Solidification of Supercooled Liquid Mercury Droplets
journal, March 1952
- Turnbull, David
- The Journal of Chemical Physics, Vol. 20, Issue 3
Heat flow in atomized metal droplets
journal, March 1980
- Levi, C. G.; Mehrbian, R.
- Metallurgical Transactions B, Vol. 11, Issue 1
Microstructures of rapidly solidified aluminum alloy submicron powders
journal, January 1982
- Levi, C. G.; Mehrabian, R.
- Metallurgical Transactions A, Vol. 13, Issue 1
Heat Flow during Rapid Solidification of Undercooled Metal Droplets
journal, February 1982
- Levi, C. G.; Mehrabian, R.
- Metallurgical Transactions A, Vol. 13, Issue 2
Stability of a Planar Interface During Solidification of a Dilute Binary Alloy
journal, February 1964
- Mullins, W. W.; Sekerka, R. F.
- Journal of Applied Physics, Vol. 35, Issue 2
Solute trapping by rapid solidification
journal, May 1969
- Baker, J. C.; Gahn, J. W.
- Acta Metallurgica, Vol. 17, Issue 5
Continuous growth model for interface motion during alloy solidification
journal, August 1988
- Aziz, Michael J.; Kaplan, Theodore
- Acta Metallurgica, Vol. 36, Issue 8
Metallographic preparation techniques for U–6wt.%Nb
journal, October 2012
- Kelly, A. M.; Field, R. D.; Thoma, D. J.
- Journal of Nuclear Materials, Vol. 429, Issue 1-3
Phase transformations and equilibrium structures in uranium-rich niobium alloys
journal, January 1964
- D'Amato, C.; Saraceno, F. S.; Wilson, T. B.
- Journal of Nuclear Materials, Vol. 12, Issue 3