多硫化钠法表征纯铜带表面清洁度

发布时间：2018-06-08 10:20

本文选题：多硫化钠 + 纯铜带　；参考：《中南大学学报(自然科学版)》2017年07期

【摘要】：利用多硫化钠(Na_2S_x)溶液与纯铜带反应,采用光学显微镜(OM)、扫描电镜(SEM)、X线衍射仪(XRD)和X线光电子能谱仪(XPS)对反应后表面层的形貌、物相和元素进行分析,考察硫指数x和反应时间对表面层形貌的影响,并对多硫化钠法表征纯铜带表面清洁度的可行性进行探讨。研究结果表明:与多硫化钠反应后,纯铜带的表面层主要由黑色或灰黑色Cu_2S组成的析出层,Cu_2S的形貌不随时间而变化,保持均匀、光滑的颗粒状。随硫指数的增加和反应时间的延长,纯铜带的表面层形貌变化规律一致,均为Cu_2S析出层逐渐加厚,Cu_2S小颗粒聚集形成短棒或大颗粒,然后析出层出现开裂,最后是裂纹的扩展和脱落。多硫化钠法可以用于定量表征纯铜带的表面清洁度,反应后纯铜带表面黑色区域面积占整个纯铜带表面面积的百分比即为纯铜带的表面清洁度。
[Abstract]:The morphology, phase and element of the surface layer of the reaction were analyzed by means of the reaction of Na2SSTX) solution with pure copper tape, optical microscope, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPSS). The effects of sulfur index x and reaction time on the surface morphology of copper strip were investigated and the feasibility of surface cleanliness characterization of pure copper strip by sodium polysulfide method was discussed. The results show that, after reaction with sodium polysulfide, the surface layer of pure copper belt is mainly composed of black or gray black Cu2S precipitates. The morphology of Cu2S does not change with time, and the surface layer of pure copper belt remains uniform and smooth granular. With the increase of sulfur index and the prolongation of reaction time, the morphology of the surface layer of pure copper strip is the same. The surface layer of pure copper strip is gradually thickened to form a short rod or large particle, and then the precipitated layer cracks, and the surface layer of the pure copper strip changes with the increase of sulfur index and the prolongation of reaction time. Finally, the crack propagation and shedding. The method of sodium polysulfide can be used to quantitatively characterize the surface cleanliness of pure copper strip. The percentage of the area of black area of pure copper strip to the whole surface area of pure copper strip is the surface cleanliness of pure copper strip.
【作者单位】：北京科技大学材料科学与工程学院;北京科技大学现代交通金属材料与加工技术北京实验室;
【基金】：国家重点基础研究发展计划(973计划)项目(2016YFB0301301) 新金属材料国家重点实验室自主研究项目(2014Z-05)~~
【分类号】：TG146.11

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