Hello, everyone! I would like to know whether there is a method to calculate the fraction of bcc, fcc and L12 phases in high-entropy alloys by XRD results, thank you very much!
A technique called Rietveld refinement allows to determine the quantitative phase fraction of all phases that are present in a sample. Available software is for example Fullprof, GSAS-II, Maud, Jana, Topas.
These program typically come with a broad set of tutorial examples and manuals.
There are several good reviews to read.
For you materials the Bragg reflections will likely overlap considerable, thus the refinement must be done carefully likely with constraints on parameters to avoid exceesive parameter correlations.
Now Rietveld refinement can give those phase fraction.
Another old method is fractional area under the curve corresponds to the phase fraction i.e.Find area under individual phase peaks ( Can be done using curve fitting in origin software). And find total area under all phase peaks. Then take their fraction to indicate phase fraction.
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