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在尿素-乙酰胺-NaBr熔盐中采用电沉积方法制备了Co-Gd合金薄膜。运用循环伏安技术研究了Gd、Co的共沉积行为。通过扫描电子显微镜、X射线能谱仪和X射线衍射仪研究了电流密度对镀层表面形貌、元素组成及镀层结构的影响。研究发现,Gd含量随着电流密度的增加呈先增加后减少的趋势,在电流密度为12.5mA/cm2时达到最大含量54.97%(质量分数)。镀层的表面形貌随着Gd含量的增加而变得粗糙。镀态时镀层结构为非晶态,300°C热处理后转化为Co(Fm3m)相,在600°C热处理后又出现GdCo5(P6/mmm)相。采用振动样品磁强计测试了镀层的磁性能。结果表明,镀层中Gd的含量对镀层的磁性能有重要影响。在热处理过程中,镀层的饱和强度在600℃热处理时达到最大值550.43kA/m,而矫顽力则在400℃热处理时达到最大值34.97kA/m。
Co-Gd alloy thin films were prepared by electrodeposition in urea-acetamide-NaBr molten salt. Cyclic voltammetry was used to study the co-deposition behavior of Gd and Co. The effects of current density on the surface morphology, elemental composition and coating structure of the coating were investigated by scanning electron microscopy, X-ray energy dispersive spectroscopy and X-ray diffraction. The results showed that the Gd content increased first and then decreased with the increase of current density, reaching the maximum content of 54.97% (mass fraction) at the current density of 12.5mA / cm2. The surface morphology of the coating becomes coarse with increasing Gd content. Plating structure when the coating is amorphous, 300 ° C heat treatment into Co (Fm3m) phase, after the heat treatment at 600 ° C GdCo5 (P6 / mmm) phase. The magnetic properties of the coating were tested using a vibrating sample magnetometer. The results show that the content of Gd coating has a significant impact on the magnetic properties of the coating. During the heat treatment, the saturation strength of the coating reached the maximum value of 550.43kA / m at 600 ℃, while the coercive force reached the maximum value of 34.97kA / m at 400 ℃.