Optasanu Virgil, Bourillot Eric, Vitry Pauline, Plassard Cédric, Beaurenaut Laure, Jacquinot Pierre, Herbst Frédéric, Berger Pascal, Lesniewska Eric, Montessin Tony
ICB, UMR 6303 CNRS - Université de Bourgogne, Dijon, F-21078, France.
Nanoscale. 2014 Dec 21;6(24):14932-8. doi: 10.1039/c4nr04017a. Epub 2014 Nov 3.
An original sub-surface, high spatial resolution tomographic technique based on scanning microwave microscopy (SMM) is used to visualize in-depth materials with different chemical compositions. A significant phase difference in SMM between aluminum and chromium buried patterns has been observed. Moreover this technique was used to characterize a solid solution of a light chemical element (oxygen) in a metal lattice (zirconium). The large solubility of the oxygen in zirconium leads to modifications of the properties of the solid solution that can be measured by the phase shift signal in the SMM technique. The signal obtained in cross-section of an oxidized Zr sample shows the excellent agreement between phase shift profiles measured at different depths. Such a profile can reveal the length of diffusion of the oxygen in zirconium under the surface. The comparison with the oxygen concentration measured by nuclear reaction analysis shows excellent agreement in terms of length of diffusion and spatial distribution of the oxygen. A rapid calibration shows a linear dependence between the phase shift and the oxygen concentration. The SMM method opens up new possibilities for indirect measurements of the oxygen concentration dissolved in the metal lattice.
一种基于扫描微波显微镜（SMM）的原始地下高空间分辨率断层扫描技术被用于可视化具有不同化学成分的深层材料。已观察到铝和铬掩埋图案在SMM中存在显著的相位差。此外，该技术被用于表征轻化学元素（氧）在金属晶格（锆）中的固溶体。氧在锆中的大溶解度导致固溶体性质的改变，这可以通过SMM技术中的相移信号来测量。在氧化锆样品的横截面中获得的信号显示了在不同深度测量的相移剖面之间的良好一致性。这样的剖面可以揭示氧在锆表面下的扩散长度。与通过核反应分析测量的氧浓度的比较在氧的扩散长度和空间分布方面显示出良好的一致性。快速校准表明相移与氧浓度之间存在线性关系。SMM方法为间接测量溶解在金属晶格中的氧浓度开辟了新的可能性。
