He irradiation resistance performance in CrNiCo, CrFeNiCo, and CrFeMnNiCo multi-principal element alloys

IF 2.8 2区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Nuclear Materials Pub Date : 2024-09-30 DOI:10.1016/j.jnucmat.2024.155432

Q. Xu , H.Q. Guan , S.S. Huang , Z.H. Zhong , M. Miyamoto , K. Yasunaga , A. Yabuuch

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Abstract

In this study, the He irradiation resistance of CrFeMnNiCo high-entropy alloy (HEA) and CrNiCo and CrFeNiCo medium-entropy alloys (MEAs), which have better mechanical properties than HEAs, was investigated. Thin-film samples of CrFeMnNiCo, CrNiCo, and CrFeNiCo were irradiated with up to 2 × 10²⁰ He/m² of 5 keV ions at 673, 773, and 873 K, respectively. In all samples, He bubble formation was observed when irradiated at 1–3 × 10¹⁹ He/m², which depended on the irradiation temperature. At low temperatures of 673 and 773 K, even when as the irradiation dose increased to 2 × 10²⁰ He/m², the differences in cavity swelling due to He bubble formation among the three alloys were not large. The relative resistance (degree) to cavity swelling for the three investigated alloys was as follows: CrNiCo MEA, CrFeMnNiCo HEA, and CrFeNiCo MEA. First-principles calculation results revealed that the formation of He-di-vacancy clusters was not possible in the CrFeNiCo MEA. This is believed to be the cause of the cavity swelling decrease in the CrFeNiCo MEA. In contrast, after 2 × 10²⁰ He/m² at 873 K, the cavity swelling of the CrNiCo and CrFeNiCo MEAs, especially CrNiCo, was approximately four times higher than that of the CrFeMnNiCo HEA. It is believed that the He irradiation resistance of the MEAs deteriorated because of element segregation owing to high–temperature irradiation.

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铬镍钴、铬铁镍钴和铬铁镍钴多主元合金的耐氦辐照性能

本研究调查了铬铁镍钴高熵合金 (HEA) 以及比 HEA 具有更好机械性能的铬镍钴和铬铁镍钴中熵合金 (MEA) 的抗 He 辐照性能。分别在 673、773 和 873 K 下用高达 2 × 1020 He/m2 的 5 keV 离子辐照了铬铁镍钴、铬镍钴和铬铁镍钴薄膜样品。所有样品在 1-3 × 1019 He/m2 的辐照条件下都观察到 He 气泡的形成，这取决于辐照温度。在 673 和 773 K 的低温下，即使辐照剂量增加到 2 × 1020 He/m2，三种合金因 He 气泡形成而导致的空穴膨胀差异也不大。所研究的三种合金对空腔膨胀的相对抵抗力（程度）如下：铬镍钴 MEA、铬铁镍钴 HEA 和铬铁镍钴 MEA。第一性原理计算的结果表明，在铬镍钴 MEA 中不可能形成氦-二空位簇。这被认为是 CrFeNiCo MEA 中空穴膨胀减小的原因。相比之下，在 873 K 下 2 × 1020 He/m2 的辐照下，CrNiCo 和 CrFeNiCo MEA（尤其是 CrNiCo）的空穴膨胀率比 CrFeMnNiCo HEA 高出约四倍。据认为，由于高温辐照导致元素偏析，MEA 的耐 He 辐照性能变差。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Nuclear Materials 工程技术-材料科学：综合

CiteScore

5.70

自引率

25.80%

发文量

601

审稿时长

63 days

期刊介绍： The Journal of Nuclear Materials publishes high quality papers in materials research for nuclear applications, primarily fission reactors, fusion reactors, and similar environments including radiation areas of charged particle accelerators. Both original research and critical review papers covering experimental, theoretical, and computational aspects of either fundamental or applied nature are welcome. The breadth of the field is such that a wide range of processes and properties in the field of materials science and engineering is of interest to the readership, spanning atom-scale processes, microstructures, thermodynamics, mechanical properties, physical properties, and corrosion, for example. Topics covered by JNM Fission reactor materials, including fuels, cladding, core structures, pressure vessels, coolant interactions with materials, moderator and control components, fission product behavior. Materials aspects of the entire fuel cycle. Materials aspects of the actinides and their compounds. Performance of nuclear waste materials; materials aspects of the immobilization of wastes. Fusion reactor materials, including first walls, blankets, insulators and magnets. Neutron and charged particle radiation effects in materials, including defects, transmutations, microstructures, phase changes and macroscopic properties. Interaction of plasmas, ion beams, electron beams and electromagnetic radiation with materials relevant to nuclear systems.