Atomistic simulation of self-diffusion and interfacial diffusion of liquid lead

Atomistic simulation of self-diffusion and interfacial diffusion of liquid lead
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液铅自扩散和界面扩散的原子模拟

DOI:
10.1016/j.jnoncrysol.2012.07.026
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发表时间:
2012-10
影响因子:
3.5
通讯作者:
L Y Zhang
L Y Zhang
中科院分区:
材料科学2区
文献类型:
--
作者:
Z H Wang;H Chen;L Y Zhang

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液态金属冷却核反应堆(英语:Liquid Metal cooled nuclear reactor)是一种先进的核反应堆,其主冷却剂是液态金属。液态金属具有安全优势,并且它允许比传统冷却剂高得多的功率密度。缺点包括与检查和腐蚀问题相关的困难。为了更清楚地了解与扩散有关的现象,研究液态金属中的自扩散和互扩散是至关重要的。采用分子动力学(MD)计算机模拟技术研究了液态铅的自扩散和互扩散过程。计算了液态铅自扩散的扩散系数和激活能,其值与实验结果一致。液态铅和固态铁的激活能之间的相互扩散关系与以前的结果相似。
A liquid metal cooled nuclear reactor, liquid metal fast reactor is an advanced type of nuclear reactor where the primary coolant is a liquid metal. Liquid metal has safety advantages and it allows a much higher power density than traditional coolants. Disadvantages include difficulties associated with inspection and corrosion problems. For a clear understanding of those phenomena related to diffusion, a study of self-diffusion and mutual diffusion in liquid metals is of critical importance. The molecular dynamics (MD) computer simulation technique has been used to study the self-diffusion and mutual diffusion processes of liquid lead. The diffusion coefficients and activation energy of liquid lead self-diffusion are calculated and the values are consistent with those in experimental results. The mutual diffusion relationship between the activation energy for liquid lead and solid iron is similar to previous results.
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