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Temperature-induced transformation in a Pu-2at. % Al alloy

Conference ·
OSTI ID:6257064

The delta phase stabilized with 2 at.% aluminum transforms to a monoclinic ..cap alpha..' phase at low temperatures by a thermally activated nucleation and displacive/diffusionless mechanism. The ..cap alpha..' phase is an expanded monoclinic lattice suggesting a valence change in the ..cap alpha..-Pu atoms as a result of trapping smaller, trivalent aluminum atoms. The transformation sequence appears to be directly delta ..-->.. ..cap alpha..'. The ..cap alpha..' product is plate-like, resembling a lenticular martensite.

Research Organization:
Los Alamos National Lab., NM (USA)
DOE Contract Number:
W-7405-ENG-36
OSTI ID:
6257064
Report Number(s):
LA-UR-81-2455; CONF-810860-4; ON: DE81030109
Country of Publication:
United States
Language:
English