TEM identification of subsurface phases in ternary U-Pu-Zr fuel

JOURNAL OF NUCLEAR MATERIALS

卷:473

Article

Aitkaliyeva, Assel¹  Madden, James W.¹  Papesch, Cynthia A.¹  Cole, James I.¹ 

[1] Idaho Natl Lab, POB 1625,MS 6188, Idaho Falls, ID 83415 USA

关键词: Metallic fuel;    Transmission electron microscopy (TEM);    Electron diffraction;   

DOI  :  10.1016/j.jnucmat.2016.02.022

来源: Elsevier

【 摘 要 】

Phases and microstructure in as-cast, annealed at 850 degrees C, and subsequently cooled U-23Pu-9Zr fuel were characterized using scanning and transmission electron microscopy techniques. SEM examination shows formation of three phases in the alloy that were identified in TEM using selective area diffraction pattern analysis: alpha-Zr globular and elongated delta-UZr2 inclusions and a thick oxide layer formed on top of beta-Pu phase, which has been initially assumed to be zeta-(U, Pu). However, further examination of the cross-sectional TEM specimens identified the matrix phases as delta-UZr2, beta-Pu, and (U, Zr)ht. Two types of inclusions were observed in the immediate vicinity of the specimen surface and they were consistent with alpha-Zr and zeta-(U, Pu). Published by Elsevier B.V.

【 授权许可】

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