 | Acta Crystallographica Section A Acta Crystallographica Section A FOUNDATIONS AND ADVANCES |
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![[Figure 3]](gv5001fig3mag.jpg)
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Figure 3
(a) Number of nucleated X-phase crystals as a function of time t following the first nucleation event at time t = t0. Only those nucleation and growth events that occurred within the tomographic FOV are recorded. Nucleation is heterogeneous and takes place on either existing crystal surfaces or the protective Al2O3 oxide skin of the sample, with nearly equal probability. (b) Length of the `long axis' (parallel to the crystallographic b direction) of X-phase crystals versus time (red curves). Shown for comparison is the growth trajectory of the d-QC along its long axis 〈00001〉 (green curve). All lengths were measured when the crystals were fully contained within the tomographic FOV except crystal #10; the cross mark at t - t0 = 380 s for crystal #10 indicates that it grew out of the tomographic FOV during the in situ experiment. Measurement errors for crystal (a) numbers and (b) lengths are minimal and arise from counting statistics. Superimposed 3D reconstructions of X-phase crystals that nucleated heterogeneously from (c) the existing crystal surface and (d) the protective Al2O3 oxide skin of the sample. Both (c) and (d) contain four different time-steps with a temporal discretization of 20 s, rendered with decreasing opacity (from opaque red to translucent yellow). The thick arrows in (c), (d) indicate where the nucleation first occurred and the dashed line in (d) indicates where the reconstructed data were cropped for ease of visualization. The grey region represents the Al2O3 oxide skin. |
![[Figure 3]](gv5001fig3.jpg)
| FOUNDATIONS ADVANCES |
ISSN: 2053-2733
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