Ca-Sr (Calcium-Strontium)
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Supplemental Literature Review: Section III
Ca-Sr (Calcium-Strontium) H. Okamoto
The Ca-Sr phase diagram in [Masslski2] was redrawn from [1986Alc], who accepted the liquidus and solidus from [1958Sch]. [1986Alc] speculated the boundaries between (bCa, bSr) and (aCa, aSr) because [1958Sch] reported three allotropic forms in both Ca and Sr instead of the currently accepted two forms. Figure 1 shows the Ca-Sr phase diagram calculated by [2003Zho]. This phase diagram based on thermodynamics is expected to be a better presentation of the Ca-Sr system than [1986Alc]. The two-phase field between (bCa, bSr) and (aCa, aSr) is so narrow that it is invisible in Fig. 1. [2008Alj] also calculated the Ca-Sr phase diagram based on the same [1958Sch] data. However, the phase diagram expressed in weight percent in [1958Sch] was reproduced in terms of atomic percent, judged from the location of data points. Nevertheless, [2008Alj] is in agreement with
[2003Zho] with regard to the very narrow (bCa, bSr) + (aCa, aSr) two-phase field. References 1958Sch: J.C. Schottmiller, A.J. King, and F.A. Kanda, The Calcium-Strontium Metal Phase System, J. Phys. Chem., 1958, 62, p 1446-1449 1986Alc: C.B. Alcock and V.P. Itkin, The Ca-Sr (Calcium-Strontium) System, Bull. Alloy Phase Diag., 1986, 7(5), p 455-457 2003Zho: Y. Zhong, K. Ozturk, and Z.K. Liu, Thermodynamic Modeling of the Ca-Sr-Zn System, J. Phase Equilib., 2003, 24(4), p 340-346 2008Alj: M. Aljarrah and M. Medraj, Thermodynamic Modelling of the Mg-Ca, Mg-Sr, Ca-Sr, and Mg-Ca-Sr Systems Using the Modified Quasichemical Model, Calphad, 2008, 32, p 240-251
Fig. 1 Ca-Sr phase diagram
Journal of Phase Equilibria and Diffusion Vol. 31 No. 5 2010
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