+point defects were investigated by both methods.
+the interstitial carbon mmigration path was identified.
+it turned out that the diffusion barrier is drastically overestimated
+within the ea description.
+
+combinations of defects were investigated by first principles methods.
+the agglomeration of point defects is energetically favorable.
+however, substitutional carbon arises in all probability.
+even transitions from the ground state are very likely to occur.
+
+concerning the precipitation simulations, the problem of
+potential enhanced slow phase space propagation was discussed.
+high temperatures are assumed necessary to simulate ibs conditions.
+at low temperatures a dumbbell dominated structure is obatined
+whereas
+it is expected that
+Stretched structures of SiC were observed at elevated temperatures.
+it is thus concluded that
+substitutional carbon is heavily involved in the precipitation process.
+the role of the Si_i was outlined.
+
+in total, these results suggest,
+that cubic SiC precipitation occurs by successive agglomeration of Cs.
+
+slide 24