Figure 2
X-ray fluorescence spectroscopy of the H2S-treated Ni-YSZ sample.
An absorption-based image (a) from the XNT experiments is compared with XRF maps of Ni (b), Zr (c), S (d). A composite map of the three elements overlaid on the corresponding region of the absorption image is also shown (e). The S signal is strongest near the edges of the Ni signal. The yellow dotted line shows the location of a cross section, extracted from the high-resolution XNT tomography, shown in (f). The pink circles in (b) – (e) and the pink arrow in (f) denote the XRF beam location and path at one particular scanning spot on the sample. The high Ni and S signals seen in (b) and (d) are correlated to a significant thickness of the scale, shown by the pink arrow in (f). The correlation of these images provides strong confidence in the identification of the scale as a nickel-sulfur compound, denoted generally by Ni-S.
