LBE erosion-corrosion behaviors of gelcasted high-speed rotating Ti3AlC2 impeller

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

Journal of Nuclear Materials Pub Date : 2025-02-21 DOI:10.1016/j.jnucmat.2025.155708

Zhanchong Zhao , Shibo Shi , Xinxin Gao , Qingsheng Wang , Youyuan Zhang , Yuying Wen , Yang Ling , Xian Zeng , Mei Ma

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引用次数: 0

Abstract

The MAX phase stands out as one of the highly prospective candidate materials for the impeller of the lead-bismuth fast reactor nuclear main pump. In order to determine the compatibility between the high-speed rotating Ti₃AlC₂ ceramic impeller and the liquid lead-bismuth eutectic (LBE) alloy, the corrosion behavior was comprehensively investigated within the LBE environment. In this study, the erosion-corrosion behavior of a high-speed rotating Ti₃AlC₂ ceramic impeller in LBE at 550 °C for 600 h was systematically investigated. The research results indicate that the Ti₃AlC₂ impeller maintained its structural integrity without macroscopic fractures after dynamic corrosion. Weight evaluation shows that during the corrosion test, the degradation of its physical or chemical properties was negligible. Surface analysis revealed the formation of a corrosion layer primarily composed of TiC and amorphous carbon, with PbO adhering to the surface as a protective barrier, effectively mitigating Ti and Al losses. Comparative analysis confirmed the superior adhesiveness of PbO over TiO₂ and Al₂O₃. The impeller maintained its mechanical performance, experiencing only a minor weight gain of 0.02 wt.% during the test. Vibration analysis confirmed operational stability, with a maximum stress of 10.76 MPa and a rotational frequency of 16.7 Hz, well below the first-order resonance frequency of 4997.7 Hz. This study furnishes crucial insights into the corrosion characteristics of the MAX phase and presents significant data. It is anticipated to provide a valuable reference for the initial application of MAX-phase ceramic impellers in advanced nuclear systems.

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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.