Figure 3
From: The nature of Pu-bearing particles from the Maralinga nuclear testing site, Australia
Imaging (BSE mode) of fresh FIB cut surfaces within the hot particles Potatohead, Bruce and CeresIII. Domains and phases are labelled based on EDS spot analyses and maps. (a) Popcorn-like texture of (Pu,U)O2±x phase(s) and pores due to gas entrapment. (b) Nano-sized (Pu,U)O2±x particles in an Al-oxide-rich matrix on the edge of the particle. (c) Detail showing absence of weathering product within a pore. (d) Textures suggestive of coexistence of Al-oxide-rich and Pu–U-Fe(Al)-rich melts. (e) Detail of Pu–U-Fe(Al)-rich aggregate. (f) Small aggregate of (Pu,U)O2±x nano-crystals. (g) Rim of the particle, showing oxidation of the metallic lead. (h) Detail of the weathering rim. Arrows in (g,h) indicate Pu-rich micro- to nano-particles. (i) Fracturing around Pu-carbide inclusions (white) resulting from radiation damage.
