Nano-scale chemical evolution in a proton-and neutron-irradiated Zr alloy
Nano-scale chemical evolution in a proton-and neutron-irradiated Zr alloy
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质子和中子辐照锆合金的纳米级化学演化
DOI：
10.1016/j.jnucmat.2017.01.049
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发表时间：
2017
影响因子：
3.1
通讯作者：
M. Preuss
中科院分区：
文献类型：
--
作者：
A. Harte;M. Topping;P. Frankel;D. Jädernäs;J. Romero;L. Hallstadius;E. C. Darby;M. Preuss
比较了质子和中子辐照Zr-2合金后第二相粒子Zr（Fe，Cr）2和Zr 2（Fe，Ni）的纳米尺度化学演化。这是通过超高空间分辨率扫描透射电子显微镜和能量色散X射线光谱法的使用来实现的。Fe耗尽观察到从两个SPP类型的照射后，与两种辐射物种，但在Zr（Fe，Cr）2的情况下，主要是从边缘区域，和均匀的Zr 2（Fe，Ni）的情况下是异质的。此外，有证据表明Zr 2（Fe，Ni）SPP相对于Zr（Fe，Cr）2的溶解延迟。因此，SPP溶解导致基质过饱和，在两种辐照物质和质子辐照下的溶质被认为非常适合于在这种情况下模拟中子辐照的效果。溶质再分配过程的机制和辐照诱导生长现象的后果进行了讨论。
Proton-and neutron-irradiated Zircaloy-2 are compared in terms of the nano-scale chemical evolution within second phase particles (SPPs) Zr(Fe,Cr)2and Zr2(Fe,Ni). This is accomplished through ultra-high spatial resolution scanning transmission electron microscopy and the use of energy-dispersive X-ray spectroscopic methods. Fe-depletion is observed from both SPP types after irradiation with both irradiative species, but is heterogeneous in the case of Zr(Fe,Cr)2, predominantly from the edge region, and homogeneously in the case of Zr2(Fe,Ni). Further, there is evidence of a delay in the dissolution of the Zr2(Fe,Ni) SPP with respect to the Zr(Fe,Cr)2. As such, SPP dissolution results in matrix supersaturation with solute under both irradiative species and proton irradiation is considered well suited to emulate the effects of neutron irradiation in this context. The mechanisms of solute redistribution processes from SPPs and the consequences for irradiation-induced growth phenomena are discussed.
使用像差校正（扫描）透射电子显微镜通过能量色散 X 射线光谱 (EDX) 研究中子和质子辐照后锆合金中铁的重新分布
影响因子：
3.1
作者：
Francis E
通讯作者：
Francis E