Secondary fluorescence near phase boundaries _ Typical cases in steel

15th European Workshop on Modern Developments and Applications in Microbeam Analysis; 7th Meeting of the International union of Microbeam Analysis Societies

材料科学;物理学

Rijnders, M.R.^1 ; Van Hoek, C.J.G.^1

TATA Steel Research and Development, Postbus 1000, IJmuiden

NL-1970 CA, Netherlands^1

关键词: Alumina particles;    Analytical results;    Coated steel;    Energy dispersive x-ray spectrometries (EDS);    Secondary fluorescence;    Steel matrix;    Wavelength-dispersive X-ray spectrometries;    Zn-coated steels;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/304/1/012012/pdf
DOI  :  10.1088/1757-899X/304/1/012012

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Secondary fluorescence (SF) from across a phase boundary can cause spurious analytical results. Two cases of SF in steel research are presented: Zn in Zn-coated steel across the interface, and Fe in alumina particles embedded in a steel matrix. Wavelength-dispersive X-ray spectrometry (WDS) and energy-dispersive X-ray spectrometry (EDS) measurements were performed both on couples of juxtaposed Fe/Zn as well as equivalent samples that were production-derived (i.e., high-T exposed). Subsequently the SF effect was modelled using CalcZAF to compare the measured profiles with the theoretical ones. For Zn in Fe it is shown that the calculations are in close agreement with the measurements, although some discrepancies need a more detailed research. This work shows the importance of the use of models to support the interpretation of experimental WDS and EDS results on coated steel samples where phase boundaries are involved.