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Figure 7
(a) Calculated liquid composition ([\langle c^{\rm L}_{{\rm Co, Ni}}\rangle], in red) during the XRT experiment, superimposed on a portion of the pseudobinary Al1-2mComNim phase diagram (0.074 [\le m \le] 0.088) that shows the equi­librium liquidus curve (cL, equilCo, Ni, in black). Errors in the calculation of the former are due to slight differences in the sample thickness between independent measurements, which in turn may influence the intensity I of the forward attenuated beam (by the Beer–Lambert law, [U \propto \exp(-d)], where d is sample thickness). The horizontal spacing between the red and black curves represents the supersaturation driving force at a given time and temperature. (b) Average facet velocity of a freely growing X-phase crystal [in red, see also Fig. 6[link](b)] and supersaturation (in blue), during the growth process. (c) Average facet velocity versus driving force of the d-QC and X phase. The slopes give the kinetic coefficient [\beta_s] which is associated with the growth process [i.e. equation (4)[link] with n = 1].

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ISSN: 2053-2733
Volume 75| Part 2| March 2019| Pages 281-296
https://doi.org/10.1107/S2053273318017114
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