The formation of f.c.c. titanium in titanium-aluminum multilayers
1996; Elsevier BV; Volume: 44; Issue: 1 Linguagem: Inglês
10.1016/1359-6454(95)00159-5
ISSN1873-2453
AutoresD. Van Heerden, D. Josell, D. Shechtman,
Tópico(s)Aluminum Alloys Composites Properties
ResumoThe Ti layers in AlTi multilayers are shown to transform from hexagonal close packed in the as-deposited multilayers to face centered cubic on ion milling in cross-section. By examining the change in free energy of the system on transformation it is demonstrated that interfacial, surface and strain free energies cannot overcome the theoretically predicted 0.08 eV/atom difference in bulk free energy between f.c.c. and h.c.p. Ti. Based on experimental observations of f.c.c. Ti in multilayers, it is argued that this value is too large.
Referência(s)