Investigating the stability of second phase particles in Zr-Nb alloys under irradiation
Investigating the stability of second phase particles in Zr-Nb alloys under irradiation
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DOI：
10.1016/j.jnucmat.2019.151738
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发表时间：
2019-12
影响因子：
3.1
通讯作者：
G. He;Junliang Liu;Kexue Li;Jing Hu;A. H. Mir;S. Lozano-Perez;C. Grovenor
中科院分区：
文献类型：
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作者：
G. He;Junliang Liu;Kexue Li;Jing Hu;A. H. Mir;S. Lozano-Perez;C. Grovenor
通过透射电子显微镜 (TEM) 中的原位重离子辐照，结合能量色散 X 射线光谱 (EDX) 的异位分析，研究了两种 Zr-Nb 合金（再结晶 Zr-1.0Nb 和 Zr-2.5Nb）中 β-Nb 第二相颗粒（SPP）的稳定性。 TEM 薄箔在 50K 至 873K 的四种不同温度下用 1MeV Kr+ 离子照射，并在高达 39dpa 的不同剂量下用 350keV Kr+ 离子照射。定量测量了单个 β-Nb SPP 的尺寸变化，并讨论了不同温度辐照下的降解机制。研究表明，SPP 和 Zr 基体之间的 Nb 重新分布受辐射引起的混合和周围 Zr 基体中的局部扩散的控制。在本研究报道的辐射条件下，β-Nb SPPs 表现出显着的抗辐射稳定性，并且在所有实验条件下，SPPs 和 Zr 基体之间 Nb 重新分布的程度非常有限。
The stability of the β-Nb Second Phase Particles (SPPs) in two types of Zr–Nb 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 1 MeV 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 β-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 β-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.