Size-dependent microstructures in rapidly solidified uranium-niobium powder particles

McKeown, Joseph T.; Hsiung, Luke L.; Park, Jong M.; Ryu, Ho J.; Turchi, Patrice E. A.; King, Wayne E.

doi:10.1016/j.jnucmat.2016.06.023

Size-dependent microstructures in rapidly solidified uranium-niobium powder particles

Journal Article · Tue Jun 14 04:00:00 EDT 2016 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2016.06.023· OSTI ID:1297650

McKeown, Joseph T. ^[1]; Hsiung, Luke L. ^[1]; Park, Jong M. ^[2]; Ryu, Ho J. ^[3]; Turchi, Patrice E. A. ^[1]; King, Wayne E. ^[1]

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)

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.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1297650

Alternate ID(s):: OSTI ID: 1326700
OSTI ID: 22644328

Report Number(s):: LLNL-JRNL--679130

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: C Vol. 479; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (40)

Heat exchange between metal particles and gas in the atomization process Nichiporenko, O. S.; Naida, Yu. I. Soviet Powder Metallurgy and Metal Ceramics, Vol. 7, Issue 7 https://doi.org/10.1007/BF00774694	journal	July 1968
Pressure build-up at the metal delivery tube orifice in ultrasonic gas atomization Baram, J. C.; Veistinen, M. K.; Lavernia, E. J. Journal of Materials Science, Vol. 23, Issue 7 https://doi.org/10.1007/BF01111903	journal	July 1988
Microstructures of rapidly solidified aluminum alloy submicron powders Levi, C. G.; Mehrabian, R. Metallurgical Transactions A, Vol. 13, Issue 1 https://doi.org/10.1007/BF02642411	journal	January 1982
Heat Flow during Rapid Solidification of Undercooled Metal Droplets Levi, C. G.; Mehrabian, R. Metallurgical Transactions A, Vol. 13, Issue 2 https://doi.org/10.1007/BF02643312	journal	February 1982
An analysis of the microstructure of rapidly solidified Al-8 wt pct Fe powder Boettinger, W. J.; Bendersky, L.; Early, J. G. Metallurgical Transactions A, Vol. 17, Issue 5 https://doi.org/10.1007/BF02643853	journal	May 1986
The effect of quench rate on the microstructure, mechanical properties, and corrosion behavior of U-6 wt pct Nb Eckelmeyer, K. H.; Romig, A. D.; Weirick, L. J. Metallurgical Transactions A, Vol. 15, Issue 7 https://doi.org/10.1007/BF02648560	journal	July 1984
Heat flow in atomized metal droplets Levi, C. G.; Mehrbian, R. Metallurgical Transactions B, Vol. 11, Issue 1 https://doi.org/10.1007/BF02657167	journal	March 1980
Undercooling and metastable phase formation in a Bi95Sb5 melt Zhou, Z.; Wang, W.; Sun, L. Applied Physics A Materials Science & Processing, Vol. 71, Issue 3 https://doi.org/10.1007/s003390000489	journal	September 2000
The rapid solidification processing of materials: science, principles, technology, advances, and applications Lavernia, Enrique J.; Srivatsan, T. S. Journal of Materials Science, Vol. 45, Issue 2, p. 287-325 https://doi.org/10.1007/s10853-009-3995-5	journal	December 2009
Solute trapping by rapid solidification Baker, J. C.; Gahn, J. W. Acta Metallurgica, Vol. 17, Issue 5 https://doi.org/10.1016/0001-6160(69)90116-3	journal	May 1969
Phase transformations in a uranium + 14 at.% niobium alloy Vandermeer, R. A. Acta Metallurgica, Vol. 28, Issue 3 https://doi.org/10.1016/0001-6160(80)90173-X	journal	March 1980
Continuous growth model for interface motion during alloy solidification Aziz, Michael J.; Kaplan, Theodore Acta Metallurgica, Vol. 36, Issue 8 https://doi.org/10.1016/0001-6160(88)90333-1	journal	August 1988
The crystal perfection depends on the superheating of the mother phase too — experimental facts and speculations on the “melt structure” of semiconductor compounds Rudolph, P.; Koh, H. J.; Schäfer, N. Journal of Crystal Growth, Vol. 166, Issue 1-4 https://doi.org/10.1016/0022-0248(96)00119-4	journal	September 1996
Metastable phases in the uranium molybdenum system and their origin Tangri, K.; Williams, G. I. Journal of Nuclear Materials, Vol. 4, Issue 2 https://doi.org/10.1016/0022-3115(61)90129-5	journal	July 1961
Phase transformations and equilibrium structures in uranium-rich niobium alloys D'Amato, C.; Saraceno, F. S.; Wilson, T. B. Journal of Nuclear Materials, Vol. 12, Issue 3 https://doi.org/10.1016/0022-3115(64)90083-2	journal	January 1964
Phases metastables dans les alliages uranium-niobium Anagnostidis, M.; Colombié, M.; Monti, H. Journal of Nuclear Materials, Vol. 11, Issue 1 https://doi.org/10.1016/0022-3115(64)90122-9	journal	January 1964
Metastable phases in uranium alloys with high solute solubility in the BCC gamma phase. Part I — the system U-Nb Tangri, K.; Chaudhuri, D. K. Journal of Nuclear Materials, Vol. 15, Issue 4 https://doi.org/10.1016/0022-3115(65)90076-0	journal	January 1965
The orientation relationship between the gamma and alpha structures in uranium-zirconium alloys Hatt, B. A. Journal of Nuclear Materials, Vol. 19, Issue 2 https://doi.org/10.1016/0022-3115(66)90102-4	journal	May 1966
Crystal structures of transition phases formed in U/16.60 at% Nb/5.64 at% Zr alloys Yakel, Harry L. Journal of Nuclear Materials, Vol. 33, Issue 3 https://doi.org/10.1016/0022-3115(69)90022-1	journal	December 1969
Containerless solidification of alloys in a drop-tube Cochrane, R. F.; Evans, P. V.; Greer, A. L. Materials Science and Engineering, Vol. 98 https://doi.org/10.1016/0025-5416(88)90135-8	journal	February 1988
Microstructural variations in rapidly solidified alloys Boettinger, William J. Materials Science and Engineering, Vol. 98 https://doi.org/10.1016/0025-5416(88)90140-1	journal	February 1988
Z-contrast stem for materials science Pennycook, S. J. Ultramicroscopy, Vol. 30, Issue 1-2 https://doi.org/10.1016/0304-3991(89)90173-3	journal	June 1989
Solidification reactions in undercooled alloys Perepezko, J. H. Materials Science and Engineering: A, Vol. 179-180 https://doi.org/10.1016/0921-5093(94)90163-5	journal	May 1994
The effect of various thermal treatments on supercooling of PbTe melts Koh, H. J.; Rudolph, P.; Schäfer, N. Materials Science and Engineering: B, Vol. 34, Issue 2-3 https://doi.org/10.1016/0921-5107(95)01319-9	journal	November 1995
The correlation between superheating and supercooling in CdTe melts during unseeded bridgman growth Mühlberg, M.; Rudolph, P.; Laasch, M. Journal of Crystal Growth, Vol. 128, Issue 1-4 https://doi.org/10.1016/S0022-0248(07)80002-9	journal	March 1993
Characterization of U-2 wt% Mo and U-10 wt% Mo alloy powders prepared by centrifugal atomization Kim, Ki Hwan; Lee, Don Bac; Kim, Chang Kyu Journal of Nuclear Materials, Vol. 245, Issue 2-3 https://doi.org/10.1016/S0022-3115(97)00011-1	journal	June 1997
Metallographic preparation techniques for U–6wt.%Nb Kelly, A. M.; Field, R. D.; Thoma, D. J. Journal of Nuclear Materials, Vol. 429, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2012.05.013	journal	October 2012
Crystallographic and kinetic origins of acicular and banded microstructures in U–Nb alloys Field, R. D.; Thoma, D. J. Journal of Nuclear Materials, Vol. 436, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2013.01.309	journal	May 2013
Rapidly solidified U–6wt%Nb powders for dispersion-type nuclear fuels McKeown, Joseph T.; Hsiung, Luke L.; Ryu, Ho Jin Journal of Nuclear Materials, Vol. 448, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2014.01.033	journal	May 2014
Size effect on surface tension of liquid binary alloy droplets Liu, L.; Wang, T. H.; Li, J. C. Solid State Communications, Vol. 152, Issue 7 https://doi.org/10.1016/j.ssc.2012.01.028	journal	April 2012
The thermodynamics of interfaces in systems of several components Guggenheim, E. A. Transactions of the Faraday Society, Vol. 35 https://doi.org/10.1039/tf9403500397	journal	January 1940
Kinetics of Solidification of Supercooled Liquid Mercury Droplets Turnbull, David The Journal of Chemical Physics, Vol. 20, Issue 3 https://doi.org/10.1063/1.1700435	journal	March 1952
Stability of a Planar Interface During Solidification of a Dilute Binary Alloy Mullins, W. W.; Sekerka, R. F. Journal of Applied Physics, Vol. 35, Issue 2 https://doi.org/10.1063/1.1713333	journal	February 1964
Dependence of crystal nucleation on prior liquid overheating by differential fast scanning calorimeter Yang, Bin; Perepezko, John H.; Schmelzer, Jürn W. P. The Journal of Chemical Physics, Vol. 140, Issue 10 https://doi.org/10.1063/1.4868002	journal	March 2014
Martensitic structures and deformation twinning in the U–Nb shape-memory alloys Field, R. D.; Thoma, D. J.; Dunn, P. S. Philosophical Magazine A, Vol. 81, Issue 7 https://doi.org/10.1080/01418610010010971	journal	July 2001
The thermodynamics of the surfaces of solutions 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 https://doi.org/10.1098/rspa.1932.0040	journal	March 1932
Quantitative X-ray microanalysis of uranium alloys with the analytical electron microscope Romig, A. D. Journal of Microscopy, Vol. 135, Issue 2 https://doi.org/10.1111/j.1365-2818.1984.tb00519.x	journal	August 1984
Atomic number and crystallographic contrast images with the SEM: a review of backscattered electron techniques Lloyd, Geoffrey E. Mineralogical Magazine, Vol. 51, Issue 359 https://doi.org/10.1180/minmag.1987.051.359.02	journal	March 1987
The Nb-U (Niobium-Uranium) system Koike, J.; Kassner, M. E.; Tate, R. E. Journal of Phase Equilibria, Vol. 19, Issue 3 https://doi.org/10.1361/105497198770342265	journal	June 1998
Use of a Centrifugal Atomization Process in the Development of Research Reactor fuel Kim, Chang-Kyu; Park, Jong-Man; Ryu, Ho-Jin Nuclear Engineering and Technology, Vol. 39, Issue 5 https://doi.org/10.5516/NET.2007.39.5.617	journal	October 2007

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