We discuss the rather scattered measurements of the lattice parameters for C49 TiSi2, which are reported in literature, along with new and accurate X-ray diffraction measurements and ab-initio calculations. Both agree in indicating that the density of the metastable C49 structure cannot be much smaller than the one for the polymorphic C54 phase, as it is commonly reported. We conclude by demonstrating that only in the case of such a smaller difference in density between the two phases, the elastic strain contribution to the nucleation energy of the C54 structure in the C49 matrix can be neglected. The estimation of the critical radius strongly depends on this issue

Migas, D., Iannuzzi, M., Miglio, L., La Via, F., Grimaldi, G. (2000). Estimation of the critical radius for the nucleation of the c54 phase in c49 tisi2 role of the difference in density. In NUCLEATION AND GROWTH PROCESSES IN MATERIALS (pp.129-134). Warrendale, PA : Materials Research Society [10.1557/PROC-580-129].

Estimation of the critical radius for the nucleation of the c54 phase in c49 tisi2 role of the difference in density

MIGLIO, LEONIDA;
2000

Abstract

We discuss the rather scattered measurements of the lattice parameters for C49 TiSi2, which are reported in literature, along with new and accurate X-ray diffraction measurements and ab-initio calculations. Both agree in indicating that the density of the metastable C49 structure cannot be much smaller than the one for the polymorphic C54 phase, as it is commonly reported. We conclude by demonstrating that only in the case of such a smaller difference in density between the two phases, the elastic strain contribution to the nucleation energy of the C54 structure in the C49 matrix can be neglected. The estimation of the critical radius strongly depends on this issue
paper
TiSi2
English
Symposium on Nucleation and Growth Processes in Materials held at the 1999 MRS Fall Meeting NOV 29-DEC 01
1999
Gonis, A; Turchi, PEA; Ardell, AJ
NUCLEATION AND GROWTH PROCESSES IN MATERIALS
1-55899-488-2
2000
580
129
134
none
Migas, D., Iannuzzi, M., Miglio, L., La Via, F., Grimaldi, G. (2000). Estimation of the critical radius for the nucleation of the c54 phase in c49 tisi2 role of the difference in density. In NUCLEATION AND GROWTH PROCESSES IN MATERIALS (pp.129-134). Warrendale, PA : Materials Research Society [10.1557/PROC-580-129].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/44148
Citazioni
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
Social impact