Phase transformations in Pu–Ga and Pu–Al alloys

Pressure effected evolution of equilibrium and metastable binary Pu–Ga (Al)-phase diagrams is discussed. With an increase in pressure δ-solid solution region decreases and disappears, which leads to a change of phase diagram type. In experiments and via thermodynamic calculations boundaries of δ-pha...

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Bibliographic Details
Published in:Journal of alloys and compounds 2007-10, Vol.444, p.124-128
Main Author: Timofeeva, L.F.
Format: Article
Language:English
Subjects:
Alloy
Aluminium
Eutectoid
Gallium
Kinetics
Phase diagram
Plutonium
Pressure
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Summary:Pressure effected evolution of equilibrium and metastable binary Pu–Ga (Al)-phase diagrams is discussed. With an increase in pressure δ-solid solution region decreases and disappears, which leads to a change of phase diagram type. In experiments and via thermodynamic calculations boundaries of δ-phase region were established at pressure varying from the atmospheric one to ∼1 GPa. Temperature of δ-phase eutectoid transformation versus pressure was determined; a fragment pressure–temperature–composition ( PTC) diagram was constructed, parameters of four-phase equilibrium were found. Influence of static pressure on δ-phase decomposition kinetics is demonstrated, feasibility of decomposing effected by loading with high intensity waves is assessed.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2006.10.053