吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (04): 964-969.doi: 10.7964/jdxbgxb201304020

• 论文 • 上一篇    下一篇

强流脉冲电子束作用下纯铜的微观结构与腐蚀性能

关庆丰1, 邹阳1, 张在强1, 关锦彤2, 苏景新3, 王志平3   

  1. 1. 江苏大学 材料科学与工程学院,江苏 镇江 212013;
    2. 江苏大学 理学院,江苏 镇江 212013;
    3. 中国民航大学 理学院,天津 300300
  • 收稿日期:2012-06-27 出版日期:2013-07-01 发布日期:2013-07-01
  • 作者简介:关庆丰(1963-),男,教授,博士生导师.研究方向:表面改性及微结构.E-mail:guanqf@ujs.edu.cn
  • 基金资助:

    国家自然科学基金项目(U1233111,50671042);江苏大学科技创新团队及高级人才基金项目(07JDG032).

Microstructures and corrosion property of pure copper under high-current pulsed electron beam irradiation

GUAN Qing-feng1, ZOU Yang1, ZHANG Zai-qiang1, GUAN Jin-tong2, SU Jing-xin3, WANG Zhi-ping3   

  1. 1. College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
    2. Faculty of Science, Jiangsu University, Zhenjiang 212013, China;
    3. College of Science, Civil Aviation University of China, Tianjin 300300, China
  • Received:2012-06-27 Online:2013-07-01 Published:2013-07-01

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摘要：

为考察辐照对纯铜材料的影响,利用强流脉冲电子束(HCPEB)技术对多晶纯铜进行表面辐照处理,详细考察了辐照前后材料表面的微观结构状态和腐蚀性能。海水腐蚀极化曲线及电极化阻抗谱实验结果表明:十次强流脉冲电子束辐照后,纯铜的抗腐蚀性能显著提高。透射电子显微镜观察表明,HCPEB辐照在材料表层诱发了大量的过饱和空位缺陷,空位缺陷的凝聚可形成空位型位错圈和堆垛层错四面体(SFT)等空位簇缺陷。空位簇缺陷有助于形成厚而致密的表面钝化膜,钝化膜具有阻挡腐蚀性阴离子的能力,从而提高材料的抗腐蚀性能。

关键词: 金属材料, 强流脉冲电子束, 纯铜, 微观结构, 抗腐蚀性能

Abstract:

Polycrystalline pure copper was irradiated by High Current Pulsed Electron Beam (HCPEB) to investigate the effect of irradiation on pure copper. Both the surface microstructures and corrosion properties of pure copper before and after HCPEB treatment were studied in detail. Experimental results indicate that the corrosion resistance of pure copper irradiated by 10 pulses was remarkably improved according to the analysis of polarization curves of copper in seawater and electrode impedance spectroscope. Transmission Electron Microscopy (TEM) observations show that large amount of supersaturated vacancy defects were produced when the material surface was subjected to HCPEB irradiation. The agglomeration of vacancies can cause the formation of vacancy clusters, such as vacancy dislocation loops and Stacking Fault Tetrahedrons (SFTs). The vacancy clusters on the irradiated surface promotes the formation of a thick and dense passive surface layer, whose ability to bock the corrosive anions is enhanced, thus improving the corrosion resistance of the material.

Key words: metallic material, high current pulsed electron beam(HCPEB), pure copper, microstructure, anti-corrosion property

中图分类号: 

  • TG171

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