| 引用本文: | 张润伟,王旭,黄志青,梁晓东,张智超,吴明.合金成分对Ag-Cu二元合金制备纳米多孔银的影响[J].材料科学与工艺,2020,28(2):25-29.DOI:10.11951/j.issn.1005-0299.20180413. |
| ZHANG Runwei,WANG Xu,HUANG Zhiqing,LIANG Xiaodong,ZHANG Zhichao,WU Ming.The influence of alloy composition on nano-porous silver de-alloyed from Ag-Cu binary alloy[J].Materials Science and Technology,2020,28(2):25-29.DOI:10.11951/j.issn.1005-0299.20180413. |
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| 摘要: |
| 本文研究了纳米多孔银的制备及合金成分对纳米多孔银微观结构的影响。选用Ag含量(原子百分数)为15%,20%和25% (分别对应亚共晶,共晶与过共晶成分)的Ag-Cu合金薄带,通过化学去合金法制得具有三维的,韧带-孔洞双连续结构的纳米多孔银。利用X射线衍射仪(XRD)与扫描电子显微镜(SEM)对试样进行物相组成和微观结构的观察与分析。研究了Cu含量的变化对纳米多孔银微观结构及性能的影响。得出结论:去合金介质及温度等腐蚀条件一定的情况下,去合金时间越长,纳米多孔银的韧带尺寸越大。在腐蚀介质和温度等条件相同的情况下,纳米多孔结构特征尺寸受合金成分影响,Cu含量越高,去合金过程中产生的孔洞/通道尺寸越大。由于Cu含量不同,Ag15Cu85,Ag20Cu80和Ag25Cu80三种成分的合金中,Ag20Cu80去合金化得到的纳米多孔Ag的韧带孔洞微观结构最均匀。 |
| 关键词: Ag-Cu二元合金 去合金 纳米多孔银 扩散 腐蚀 |
| DOI：10.11951/j.issn.1005-0299.20180413 |
| 分类号:TG113 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51574147); 辽宁省自然科学基金(201602474). |
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| The influence of alloy composition on nano-porous silver de-alloyed from Ag-Cu binary alloy |
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ZHANG Runwei1, WANG Xu1, HUANG Zhiqing2, LIANG Xiaodong1, ZHANG Zhichao1, WU Ming1
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(1.School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001,China; 2. Institute of Advanced Study, City University of Hong Kong, Hong Kong 999077,China) [HJ1.3mm]
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| Abstract: |
| This study investigated the preparation of nano-porous silver and the effect of alloy composition of precursor Ag-Cu alloy on microstructure. Ag-Cu alloy ribbons with the alloy composition (atom percent) of 15%, 20%, and 25% (corresponding to hypoeutectic, eutectic, and hypereutectic composition) were selected to prepare nano-porous silver. The alloy ribbons were corroded by a chemical de-alloying method and the microstructure with 3-dimentional bi-continuous ligament-pore structure was obtained. The phase composition and microstructure of the samples were observed and analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The effects of alloy composition on the microstructure and properties of the nano-porous silver materials were investigated. It is concluded that when the corrosion conditions such as de-alloying medium and de-alloying temperature are certain, the longer the de-alloying time is, the larger the ligament size of nano-porous silver is. Under the same conditions of corrosive medium and temperature, the characteristic size of the nano-porous structure is affected by the composition of the alloy. The higher the Cu content, the larger the producedpore/channel size during the dealloying process. Due to the variation of Cu content, the microstructure of nano-porous Ag obtained by de-alloying Ag20Cu80 is finer than that of Ag15Cu85and Ag25Cu85. |
| Key words: Ag-Cu binary alloy de-alloying nano-porous metal diffusion corrosion |
