Tungsten is the prime candidate material for the plasma facing divertor system and first wall armor of future nuclear fusion reactors. However, the understanding of the microstructural and chemical evolution of pure tungsten under neutron irradiation is relatively unknown, in part due to a lack of experimental data on this topic. Here, single crystal tungsten has been irradiated in the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory at a nominal temperature of 700–800 °C to damage levels of 0.1 and 1.8 displacements per atom (dpa). Inventory calculations of the neutron irradiation experiments have been used to track isotope generation and decay to inform atom probe tomography (APT) results in the determination of the transmutation-induced precipitate compositions. Furthermore, APT crystallography has been used to show the relationship between precipitates and matrix. The composition of the precipitates is shown to progress towards that of the σ -phase at ...

中文翻译：

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中子辐照单晶钨中第二相沉淀物的原子探针层析成像和存量计算检查

钨是面向等离子体的偏滤器系统和未来核聚变反应堆的第一壁装甲的主要候选材料。但是，对中子辐照下纯钨的微观结构和化学演化的了解相对未知，部分原因是缺乏有关该主题的实验数据。在这里，橡树岭国家实验室的高通量同位素反应堆（HFIR）中以700-800°C的标称温度辐照了单晶钨，其破坏水平为每原子（dpa）0.1和1.8位移。中子辐照实验的库存计算已用于跟踪同位素的产生和衰变，以告知原子探针层析成像（APT）结果以确定determination变诱发的沉淀物成分。此外，APT晶体学已用于显示沉淀物与基质之间的关系。析出物的组成显示在...时向σ相发展。