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首页> 外文期刊>Applied Surface Science >Electron Energy Loss Spectroscopy Study Of The Near Surface Region Of The Ternary Co-cr-mo Alloy
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Electron Energy Loss Spectroscopy Study Of The Near Surface Region Of The Ternary Co-cr-mo Alloy

机译：三元Co-cr-mo合金近表面区域的电子能量损失谱研究

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Nature of the characteristic electron energy losses in the second electron emission spectra from the ternary Co-Cr-Mo alloy surface are studied in the low energy range of the primary electron energy E_0. The main types of losses were found: surface and bulk plasmons and their hybrid modes, interband transitions and ionization losses. For Co, Cr, Mo and Co-Cr-Mo alloy the experimental values of the plasmon energy were established to be less than it was predicted by free-electron gas model. Excess of conductive electrons in the surface layers for Co, Cr and Mo was observed by dependence of the surface plasmon dispersion from E_0, while for Co-Cr-Mo alloy the situation is quit opposite. Such behavior is explained by the complex phase structure of the ternary alloy. The analysis of intensity lines of plasmons from E_0 showed deeply changed alloy profile. Ionization Spectroscopy was used for studying the alloy elements distributing on the depth. Mo atoms preferred segregation in the outermost layers of Co-Cr-Mo alloy and enrichment with Cr competitive atoms in underlayers is displayed.
机译：在低一级电子能量E_0的能量范围内，研究了三元Co-Cr-Mo合金表面第二电子发射光谱中特征电子能量损失的性质。发现了主要的损耗类型：表面和体等离子体激元及其混合模式，带间跃迁和电离损耗。对于Co，Cr，Mo和Co-Cr-Mo合金，建立的等离激元能量实验值小于自由电子气体模型所预测的值。 Co，Cr和Mo的表面层中存在过多的导电电子，这取决于E_0的表面等离激元弥散，而Co-Cr-Mo合金则完全相反。三元合金的复杂相结构解释了这种行为。对E_0的等离激元强度线的分析表明，合金轮廓发生了很大变化。电离光谱法用于研究合金元素在深度上的分布。显示出Mo原子优选在Co-Cr-Mo合金的最外层偏析并在下层中富集Cr竞争原子。

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