M
M.J. Welland
Researcher at Chalk River Laboratories
Publications - 33
Citations - 651
M.J. Welland is an academic researcher from Chalk River Laboratories. The author has contributed to research in topics: Phase (matter) & Fission. The author has an hindex of 12, co-authored 28 publications receiving 499 citations. Previous affiliations of M.J. Welland include Royal Military College of Canada & Institute for Transuranium Elements.
Papers
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Journal ArticleDOI
Recent advances in the study of the UO2–PuO2 phase diagram at high temperatures
R. Böhler,M.J. Welland,Damien Prieur,P. Cakir,Tonya Vitova,Tim Pruessmann,I. Pidchenko,Christoph Hennig,Christine Guéneau,R.J.M. Konings,Dario Manara +10 more
TL;DR: In this paper, it is shown that uncertainty bands related to oxygen behavior in the equilibria between condensed phases and gas should not significantly affect the qualitative trend of the current solid-liquid phase boundaries.
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Avalanching strain dynamics during the hydriding phase transformation in individual palladium nanoparticles.
Andrew Ulvestad,Andrew Ulvestad,M.J. Welland,Sean S. E. Collins,Ross Harder,Evan Maxey,James Wingert,Andrej Singer,Sunny Hy,Paul Mulvaney,Peter Zapol,Oleg Shpyrko +11 more
TL;DR: This work studies the hydriding phase transformation in individual palladium nanocubes in situ using coherent X-ray diffractive imaging and provides a general framework for designing and optimizing phase transformations for single nanocrystals in reactive environments.
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Three-dimensional imaging of dislocation dynamics during the hydriding phase transformation
Andrew Ulvestad,M.J. Welland,Wonsuk Cha,Yaohua Liu,Jong Woo Kim,Ross Harder,Evan Maxey,Jesse N. Clark,Matthew J. Highland,Hoydoo You,Peter Zapol,Stephan O. Hruszkewycz,G. B. Stephenson +12 more
TL;DR: This work uses Bragg coherent diffractive imaging to image defects during the hydriding phase transformation of palladium nanocrystals and reveals how particle size and phase morphology affects transformations in the PdH system.
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Unit mechanisms of fission gas release: Current understanding and future needs
Michael R. Tonks,Michael R. Tonks,David A. Andersson,Ram Devanathan,R. Dubourg,Anter El-Azab,Michel Freyss,Fernando Iglesias,Katalin Kulacsy,Giovanni Pastore,Simon R. Phillpot,M.J. Welland +11 more
TL;DR: In this article, the basic mechanisms of fission gas release during normal reactor operation are summarized and critical areas where work is needed are identified, which can serve as a model on how a coupled experimental and modeling approach can be applied to understand the unit mechanisms behind other critical behaviors in reactor materials.
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Miscibility Gap Closure, Interface Morphology, and Phase Microstructure of 3D LixFePO4 Nanoparticles from Surface Wetting and Coherency Strain
TL;DR: It is found that the miscibility gap vanishes for particles of radius ∼5 nm, and the solubility limits change with overall particle lithiation, as well as the equilibrium microstructure and voltage profiles as they depend on size and overall lithiation.