Schematic of data scaling process for radial distribution analysis. Data in arbitrary units (a) are scaled to electron units by oscillation about coherent and incoherent scattering (b) to result in (c) (see Ref. 14).
Radial distribution function (RDF) for RAG4 sample. is also included for comparison. Note the presence of first four nearest neighbor shells.
Anomalous dispersion correction factors for (a) Ni edge at and (b) Nb edge at .
Monochromator scans across Ni absorption edge. The black arrow corresponds to the point of inflection of .
Individual synchrotron scattering patterns taken for an individual RAG3 sample.
Raw scattering data comparisons of a RAG3 sample near Ni edge. Note differences in uncorrected intensities at various scattering vector, , values.
DDF comparisons for RAG3 .
Differential RDF plot for a typical RAG3 sample extrapolated to .
(Color) bcc-like model for cluster arrangement of RAG3 alloy consisting of Ni-rich (blue spheres) and Nb-rich clusters. Beginning with distinct clusters of radii (a), this model is slightly perturbed to reveal variations from this distance (b). Finally, the abrupt transition from a Ni-rich region to a Nb-rich region is softened to reveal nondistinct edges to these clusters in (c).
In situ x-ray scans with heating of RAG3 at (scan time ).
[(a) and (b)] SEM images of polished surface. Note raised features of micron dimensions.
Article metrics loading...
Full text loading...