Table 5 Composition ratios as obtained by EDS and EDS + EXAFS, site occupancies in the A3B structure taking into account antisite disorder (and exchange antisite for Ta + Ti) and long range order parameters.
Design Subs/Stack | Sample ID | A15 Nb/Sn | (Nb + Ti + (1−x)Ta) /(Sn + xTa) | x | c Nb (A) | c Ti (A) | c Ta (A) | c Sn (A) | c Sn (B) | c Ta (B) | c Nb (B) | η Nb | η Sn | η |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
54/61 | Ta#1 | 2.879 | 2.864 | 0.30 | 0.966 | 0.022 | 0.012 | 0.972 | 0.028 | 0.966 | 0.960 | 0.965 | ||
Ta + Ti | 2.898 | 2.926 | 0.32 | 0.942 [0.952] | 0.018 [0.018] | 0.024 [0.024] | 0.017 [0.006] | 0.936 [0.967] | 0.033 [0.033] | 0.031[0] | 0.911 [0.952] | 0.919 [0.960] | 0.913 | |
Ti#1 | 3.200 | 3.336 | 0.977 | 0.023 | 0.936 | 0.064 | 0.913 | 0.936 | 0.919 | |||||
108/127 | Ti#2 | 3.272 | 3.414 | 0.983 | 0.017 | 0.924 | 0.076 | 0.907 | 0.924 | 0.911 | ||||
Ta#2 | 3.125 | 3.144 | 0.21 | 0.963 | 0.037 | 0.936 | 0.030 | 0.035 | 0.928 | 0.936 | 0.930 |
