Interfaces enhanced plasma irradiation resistance in CrMoTaWV/W multilayer films through blocking He diffusion

Chenyi Qu, Mengqing Hong, Guo Wei, Wentao Ge, Enkai Guo, Fen Zhong, Guangxu Cai, Yongqiang Wang, Feng Ren2024年8月Nuclear FusionIF 3 出版社

The performance of plasma-facing materials (PFMs) is one of the key factors that significantly impact the stability of operation in fusion reactors. Herein, a new CrMoTaWV/W (high entropy alloy (HEA)/W) multilayer structure is designed as PFM to investigate its resistance to He plasma irradiation. It was observed that the introduction of the interfaces effectively absorbed plenty of He atoms, preventing them from diffusing into the material and delaying the formation of fuzz incubation zone, therefore, enhancing the resistance to plasma irradiation. The thickness transformed to fuzz in the HEA/W multilayer films was observed to be about two-thirds of those in the CrMoTaWV (HEA) film. Additionally, the fuzz growth rates in HEA/W multilayer films are lower than the average growth rate of bulk W and HEA films combined. These findings highlight a promising new avenue for the exploration of high-performance PFMs.

AIによる論文要約

ENThis paper should be read by fusion researchers and materials scientists interested in developing high-performance PFMs for fusion reactors. The findings provide insights into the use of multilayer structures to improve the plasma irradiation resistance of PFMs.#FusionReactor #PlasmaMaterials #HighEntropyAlloy #MultilayerStructure #PlasmaIrradiationResistance

This paper investigates a new CrMoTaWV/W multilayer structure as a plasma-facing material (PFM) for fusion reactors. The interfaces in the multilayer effectively absorbed helium atoms, preventing them from diffusing into the material and delaying the formation of a fuzz incubation zone, thereby enhancing the resistance to plasma irradiation. The fuzz growth rates in the multilayer films were also lower than the average growth rate of bulk tungsten and high-entropy alloy films.

この論文では、核融合炉の炉壁材料としての新たな多層膜構造を提案しています。この多層膜は、界面でヘリウム原子を効果的に吸収し、材料内部への拡散を抑制することで、プラズマ照射に対する耐性を向上させることができます。これにより、従来の単層材料に比べ、ファズ(表面の繊維状構造)の発生を遅らせ、成長速度も抑えることができます。この新しい材料は、核融合炉の高性能化に貢献する可能性があります。