Investigating the stability of second phase particles in Zr-Nb alloys under irradiation

JOURNAL OF NUCLEAR MATERIALS

卷:526

Article

He, Guanze¹  Liu, Junliang¹  Li, Kexue¹  Hu, Jing²  Mir, Anamul Haq³  Lozano-Perez, Sergio¹  Grovenor, Chris¹ 

[1] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

[2] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA

[3] Univ Huddersfield, Sch Comp & Engn, Huddersfield HD1 3DH, W Yorkshire, England

关键词: Second phase particles;    Zirconium;    beta-Nb;    In-situ heavy ion irradiation;    Zr-Nb alloy;    STEM EDX;   

DOI  :  10.1016/j.jnucmat.2019.151738

来源: Elsevier

【 摘 要 】

The stability of the beta-Nb Second Phase Particles (SPPs) in two types of ZreNb alloys (recrystallised Zr-1.0Nb and Zr-2.5Nb) was studied by in-situ heavy ion irradiation in a transmission electron microscope (TEM), combined with ex-situ analysis by energy dispersive x-ray spectroscopy (EDX). TEM thin foils were irradiated by 1MeV Kr+ ions at four different temperatures from 50 K to 873 K, and by 350 keV Kr+ ions at different doses up to 39dpa. The change in size of individual beta-Nb SPPs has been measured quantitatively, and the degradation mechanisms under irradiation at different temperatures discussed. It has been shown that the Nb redistribution between the SPPs and the Zr matrix is governed both by radiation induced mixing and local diffusion in the surrounding Zr matrix. Under the radiation conditions reported in this study, the beta-Nb SPPs have shown remarkably stability against irradiation, and the extent of Nb redistribution between the SPPs and Zr matrix is very limited under all experimental conditions. (C) 2019 Elsevier B.V. All rights reserved.

【 授权许可】

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