|About this Abstract
||Materials Science & Technology 2019
||Late News Poster Session
||P2-11: Beware if you are Using Cobalt! Effect of Fluorescence and Microabsorption on XRD Patterns
||Anuj Rathi, William S.L. Boyer
|On-Site Speaker (Planned)
The emerging market of multi principle element alloys have motivated many XRD studies of their structures. The presence of multiple elements with substantially different mass absorption coefficients can cause very large systematic and statistical errors in quantitative and qualitative analysis. Two of the important phenomena exacerbating these errors are fluorescence, which increases the background, and microabsorption which reduces the apparent fraction of elements with greater mass absorption coefficients. Some remedies for these issues are available but require changes in sample preparation and data collection strategies; sometimes unacceptable sample modification may be required; therefore, results will remain inexact. XRD users must be aware of when to expect fluorescence and microabsorption and how errors can be reduced and remaining errors understood. The principles are well illustrated in the Fe-Co-Ni system, for which we show the effects of fluorescence and microabsorption along with how to reduce their impact and explain XRD pattern features.