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Affection of Cu content on the phase evolution during the dealloying of Ag-Cu alloys using electrochemical noise with Hilbert spectra analysis

机译:希尔伯特光谱分析中的电化学噪声对铜含量对银铜合金脱合金过程中相演变的影响

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摘要

The affection of Cu content on the phase evolution of Ag-Cu alloys was investigated by electrochemical noise (EN) with Hilbert spectra analysis. The results showed that the dealloying corrosion rate decreased and contribution of the transient shift from low-frequency parts (diffusion process) to the high-frequency parts (dissolution process) increased with the content of Cu increasing. Due to the increasement of Cu content, amounts of the Ag2Cu phases would be promoted. Ag2Cu phases had higher potential contrast with Cu phases and promoted the formation of different phase boundary, and different phase boundary would inhibit the diffusion of Ag atom. Thus, the hypoeutectic Ag15Cu85 alloys performed highest dealloying corrosion rate and the contribution of the transient at the highest-frequency parts followed by Ag20Cu80 and Ag25Cu75 alloys. (C) 2016 Elsevier B.V. All rights reserved.
机译:利用希尔伯特光谱分析,通过电化学噪声(EN)研究了Cu含量对Ag-Cu合金相变的影响。结果表明,随着Cu含量的增加,脱合金腐蚀速率降低,从低频部分(扩散过程)到高频部分(溶解过程)的瞬态转变的贡献增加。由于Cu含量的增加,将促进Ag 2 Cu相的量。 Ag2Cu相与Cu相具有较高的电势对比,并促进了不同相界的形成,而不同相界会抑制Ag原子的扩散。因此,亚共晶的Ag15Cu85合金表现出最高的脱合金腐蚀速率,并且在最高频率的部位产生瞬态的贡献,其次是Ag20Cu80和Ag25Cu75合金。 (C)2016 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Materials Letters》 |2016年第15期|165-169|共5页
  • 作者单位

    Liaoning Shihua Univ, Sch Mech Engn, Fushun 113001, Peoples R China|Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Corros & Protect Lab, Minist Educ, Nantong ST 145, Harbin 150001, Peoples R China;

    Liaoning Shihua Univ, Sch Mech Engn, Fushun 113001, Peoples R China;

    Natl Sun Yat Sen Univ, Dept Mat & Optoelect Sci, Kaohsiung 804, Taiwan;

    Liaoning Shihua Univ, Sch Mech Engn, Fushun 113001, Peoples R China;

    Liaoning Shihua Univ, Sch Mech Engn, Fushun 113001, Peoples R China;

    Liaoning Shihua Univ, Sch Mech Engn, Fushun 113001, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Silver; Copper; Corrosion; Diffusion; Electrochemical noise; Hilbert spectra;

    机译:银;铜;腐蚀;扩散;电化学噪声;希尔伯特光谱;

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