Real-time imaging, spectroscopy, and structural investigation of cathodic plasma electrolytic oxidation of molybdenum
Real-time imaging, spectroscopy, and structural investigation of cathodic plasma electrolytic oxidation of molybdenum
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DOI：
10.1063/1.4922870
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发表时间：
2015-06
影响因子：
3.2
通讯作者：
S. Stojadinović;N. Tadic;N. Šišović;R. Vasilić
中科院分区：
文献类型：
--
作者：
S. Stojadinović;N. Tadic;N. Šišović;R. Vasilić
本文介绍了在硼砂、水和乙二醇的混合溶液中在 160 V 电压下对钼进行阴极等离子体电解氧化 (CPEO) 的研究结果。实时成像和光学发射光谱用于 CPEO 的表征。在此过程中，阴极周围形成蒸汽包层，蒸汽包层内的强电场导致等离子体放电的产生。氢巴尔默线Hβ（486.13 nm）的谱线形状分析表明，等离子体放电的特征是电子数密度约为1.4 × 1021 m−3。通过测量钼原子线强度估算出 15 000 K 的电子温度。通过扫描电子显微镜、能量色散 X 射线光谱和 X 射线衍射对 CPEO 形成的涂层的表面形貌、化学成分和相组成进行了表征。 CPEO涂层的元素成分是Mo和O，主要晶型是MoO3。
In this paper, the results of the investigation of cathodic plasma electrolytic oxidation (CPEO) of molybdenum at 160 V in a mixed solution of borax, water, and ethylene glycol are presented. Real-time imaging and optical emission spectroscopy were used for the characterization of the CPEO. During the process, vapor envelope is formed around the cathode and strong electric field within the envelope caused the generation of plasma discharges. The spectral line shape analysis of hydrogen Balmer line Hβ (486.13 nm) shows that plasma discharges are characterized by the electron number density of about 1.4 × 1021 m−3. The electron temperature of 15 000 K was estimated by measuring molybdenum atomic lines intensity. Surface morphology, chemical, and phase composition of coatings formed by CPEO were characterized by scanning electron microscopy with energy dispersive x-ray spectroscopy and x-ray diffraction. The elemental components of CPEO coatings are Mo and O and the predominant crystalline form is MoO3.