C49C54 phase transition in nanometric titanium disilicide nanograins
The first order C49C54 phase transition was studied in single TiSi2 grains embedded in a Si matrix by transmission electron microscopy and X-ray diffraction. The fraction of material transformed into C54 was determined at different times during the annealing in the 7001100C temperature range. The fraction of C54 increases with temperature and the steady state value is reached in times of ?60 s. The data are interpreted in terms of heterogeneous nucleation at the silicidesilicon interface.
tisi2 x-ray nucleation phase transformation clusters