Preparation of New Corrosive Resistive Magnesium Coating Films
Preparation of New Corrosive Resistive Magnesium Coating Films
复制标题
新型耐蚀镁镀膜的制备
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
Myeong H Lee
中科院分区：
文献类型：
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作者：
Myeong H Lee
沉积膜的性质取决于沉积条件，而这些又关键地取决于膜的形态和晶体取向。因此，重要的是要澄清的形核发生和生长阶段的形貌和取向的薄膜的沉积参数的影响，例如，气体压力和偏压等。在这项工作中，镁薄膜制备冷轧钢基板上的热电子激活离子镀技术。通过扫描电子显微镜（SEM）和X射线衍射（XRD）研究了氮气压力和衬底偏压对薄膜晶体取向和形貌的影响。随着氮气压力的增加，镁膜的衍射峰变得不那么尖锐，并且变宽。随着氮气压力的增加，薄膜形貌由柱状结构向粒状结构转变，表面晶粒尺寸减小。薄膜的形貌不仅取决于气压，还取决于偏压，即，增加偏压的效果类似于降低气压的效果。通过测定镁膜在脱气的3%NaCl溶液中的阳极极化曲线，研究了镁膜的晶向和形貌对腐蚀行为的影响。一般来说，镁在所有环境中都不具有良好的耐腐蚀性。然而，这些镁薄膜制备通过改变氮气压力显示出良好的耐腐蚀性。在这些膜中，具有颗粒状结构的镁膜具有最高的耐腐蚀性。上述现象可以用氮气的吸附、吸留和离子溅射效应来解释。
The properties of the deposited film depend on the deposition condition and these, in turn depend critically on the morphology and crystal orientation of the films. Therefore, it is important to clarify the nucleation occurrence and growth stage of the morphology and orientation of the film affected by deposition parameters, e.g. the gas pressure and bias voltage etc. In this work, magnesium thin flims were prepared on cold-rolled steel substrates by a thermo-eletron activation ion plating technique. The influence of nitrogen gas pressure and substrate bias voltage on their crystal orientation and morphology of the coated films were investigated by scanning electron microscopy (SEM) and X-ray diffraction, respectively. The diffraction peaks of magnesium film became less sharp and broadened with the increase of nitrogen gas pressure. With an increase in nitrogen gas pressure, flim morphology changed from colum nar to granular structure, and surface crystal grain-size decreased. The morphology of films depended not only on gas pressure but also on bias voltage, i.e., the effect of increasing bias voltage was similar to that of decreasing gas pressure. The effect of crystal orientation and morphology of magnesium films on corrosion behaviors was estimated by measuring anodic polarization curves in deaerated 3%NaCl solution. Magnesium, in general, has not a good corrosion resistance in all environments. However, these magnesium films prepared by changing nitrogen gas pressure showed good corrosion resistance. Among the films, magnesium films which exhibited granular structure had the highest corrosion resistance. The above phenomena can be explained by applying the effects of adsorption, occlusion and ion sputter of nitrogen gas.
用于高速等离子体发射的纳秒激光-目标相互作用
DOI：
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发表时间：
2015
期刊：
影响因子：
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作者：
Ryosuke Koyama;Nao Akashi;Shigeru Yamaguchi;Ikkoh Funaki;Hideyuki Horisawa
通讯作者：
Hideyuki Horisawa