view article
Figure 10
(a) In situ detected structural changes during the N2 exposure (3 mbar) of a stack of Nb foils (2 × 6 µm thickness) at 900°C as a function of time. A clear reduction of all peaks in the magnitude of the Fourier-transformed k2-weighted EXAFS data FT|χ(k)k2| are detectable (k-range for the FT: 2.2 Å−1 < k < 10.8 Å−1, the data are not corrected for phase shifts). The intensity of the peak related to the nearest neighbour |FT(R1)| is plotted as a function of the process time in (b). After 60 min preheating under vacuum at 900°C, the sample was exposed to an atmosphere of dried N2 gas at 3 mbar. Black circles correspond to the pre-heating phase under high-vacuum conditions, while the coloured data points in (b) belong to the treatment in 3 mbar N2 according to the legend in (a). For t > 0, the fit line corresponds to an exponential decay with time.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 1| January 2021| Pages 266-277
https://doi.org/10.1107/S1600577520013557
Follow J. Synchrotron Rad.
Sign up for e-alerts
E-alerts
Follow J. Synchrotron Rad. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS