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The microstructures and corrosion properties of polycrystalline copper induced by high-current pulsed electron beam

机译：大电流脉冲电子束诱导的多晶铜的显微组织和腐蚀性能

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摘要

In order to investigate the corrosion mechanism of pure metal materials containing little impurities, polycrystalline commercial pure (cp) copper was irradiated by high-current pulsed electron beam (HCPEB). The surface microstructures of irradiated samples are characterized by using optical microscopy and transmission electron microscopy (TEM). The corrosion resistance is also investigated by using polarization curves of seawater corrosion and electrode impedance spectroscopy (EIS). The experimental results indicate that the corrosion resistance of cp copper irradiated by 10 pulses is remarkably improved comparing with the original sample. TEM observations suggest that large amount of supersaturated vacancy defects are produced when the material surface is subjected to the HCPEB irradiation. Furthermore, the agglomerations of the vacancy defects cause the formation of the vacancy cluster defects, such as vacancy dislocation loops, the stacking fault tetrahedra (SFTs) and voids. It is suggested that the structural defects on the irradiated surface have some relationships with the corrosion resistance's improvement of the material.
机译：为了研究含杂质少的纯金属材料的腐蚀机理，用大电流脉冲电子束（HCPEB）辐照多晶商业纯（cp）铜。通过光学显微镜和透射电子显微镜（TEM）表征被辐照样品的表面微观结构。还通过使用海水腐蚀的极化曲线和电极阻抗谱（EIS）研究了耐腐蚀性。实验结果表明，与原始样品相比，经10个脉冲辐照的cp铜的耐蚀性显着提高。 TEM观察表明，当材料表面受到HCPEB辐照时会产生大量的过饱和空位缺陷。此外，空位缺陷的聚集导致空位簇缺陷的形成，例如空位错环，堆垛层错四面体（SFT）和空隙。建议在被辐照表面上的结构缺陷与材料的耐腐蚀性的提高有一定关系。

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  • 来源
    《Applied Surface Science》 |2014年第1期|9-14|共6页
  • 作者

    Zaiqiang Zhang; Shengzhi Yang; Peng Lv; Yan Li; Xiaotong Wang; Xiuli Hou; Qingfeng Guan;

  • 作者单位

    College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;

    College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;

    College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;

    College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;

    College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;

    College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;

    College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China Key Laboratory of Materials Modification by Laser, Ion and Electron Beams of Ministry of Education, Dalian University of Technology, Dalian 116024, China;

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  • 正文语种 eng
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  • 关键词

    High current pulsed electron beam (HCPEB); cp Copper; Craters; Microstructure; Corrosion resistance;

    机译：大电流脉冲电子束（HCPEB）;cp铜;火山口;微观结构耐腐蚀性能;

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