Hanfeng Song , Chao Qi , Jiaguan Peng , Pengcheng Guo , Junyun Lai , Long Cheng , Yue Yuan , Bo Wang , Guang-Hong Lu
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引用次数: 0
摘要
钨(W)是核聚变反应堆等离子体面材料的理想候选材料,但其应用却受到起泡等难题的阻碍。本研究提出了一种层状微结构钨设计,它是通过堆叠厚度为 0.05 毫米和 0.1 毫米的热轧钨箔而开发的。等离子体暴露的表面表现出强烈的优先[110]取向、纳米级晶粒和垂直于表面的晶界,此外,箔片之间还存在层间间隙。层叠样品由层叠微结构 W 和 2.5 mm 厚的热轧再结晶 W 块体组成,样品制作完成后暴露在通量为 3 × 1020 离子 m-2s-1 的氘等离子体中,通量分别为 1 × 1025 离子 m-2 和 5 × 1025 离子 m-2。结果表明,层压微结构 W 具有优异的抗起泡能力。此外,层叠 W 箔还成功地钎焊到了铜基板上,验证了制造层叠 W 等离子体面组件 (PFC) 的可行性。这些研究结果表明,层压 W 基 PFC 是一种很有前途的设计策略,可提高 PFC 在聚变反应堆条件下的辐照耐受性。
Resistance to deuterium-induced blistering in laminated microstructure tungsten
Tungsten (W) is a promising candidate for plasma-facing materials in fusion reactors; however, its application is hindered by challenges such as blistering. This study proposes a laminated microstructure W design, developed by stacking warm-rolled W foils with thicknesses of 0.05 mm and 0.1 mm. The plasma-exposed surface exhibited a strong preferential [110] orientation, nanoscale grains, and grain boundaries oriented perpendicular to the surface, in addition to interlayer gaps between the foils. Laminated samples, composed of laminated microstructure W and 2.5 mm thick warm-rolled and recrystallized W bulks, were fabricated and exposed to deuterium plasma at a flux of 3 × 1020 ions m-2s−1, with fluences of 1 × 1025 ions m−2 and 5 × 1025 ions m−2. The results demonstrated that the laminated microstructure W exhibits superior resistance to blistering. Furthermore, laminated W foils were successfully brazed onto a Cu substrate, validating the feasibility of manufacturing laminated W plasma-facing component (PFC). These findings indicate that laminated W-based PFC represent a promising design strategy for improving the irradiation tolerance of PFC under fusion reactor conditions.
期刊介绍:
The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.