88 / 390
Figure 3.
Computed solidification path for three silicon alloys with 0.1%Al-1%Ca, 0.55%Al-
0.45%Ca and 0.6%Al-0.4%Ca
Figure 4.
Computed solidification path for a silicon alloy with 0.1%Ca-1%Fe and 1%Ca-
0.02%Fe
Additional work is planned to assess the predictive power of the model by comparison
with solidification experiments and DTA measurements.
Application
In order to illustrate the potential of this new tool, one case study is presented. The
study analyses the effect of alloy composition on the amount of the different
precipitated phases.
Sistruc is used to here to tailor the composition in order to obtain desired intermetallic
compounds for specific downstream process. The range of studied alloys is presented
in Table 1. The results show that the model is able to reproduce the well-known effect
of inverting the Al/Ca ratio between alloy 1 and 2 which leads to the disappearance of
CaSi
2
. Comparison of alloy 2 and 3 illustrates the effect of Fe content on the amount of
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