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Spatial Lithium Quantification by Backscattered Electron Microscopy Coupled with Energy-Dispersive X-Ray Spectroscopy

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Document pages: 12 pages

Abstract: The quantification of lithium in electron microscopes by energy-dispersive X-ray spectroscopy (EDS) is highly challenging due to the low energy of the characteristic X-rays. Only special windowless detectors can detect Li, yet the sensitivity is suboptimal (i.e., ~20 wt. ). We introduce the use of quantitative backscattered electron microscopy in combination with measurements using a standard EDS sensor to achieve spatially resolved quantification of Li. The method is demonstrated using two Mg-Li alloys with 4 and 20 wt. Li and good accuracy with a deviation of only ~1.2 wt. and ~2.5 wt. , respectively, is achieved.

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