The formation of f.c.c. titanium in titanium-aluminum multilayers

Journal Article · Sun Dec 31 23:00:00 EST 1995 · Acta Materialia

DOI:https://doi.org/10.1016/1359-6454(95)00159-5· OSTI ID:271710

Van Heerden, D; Josell, D ^[1]; Shechtman, D ^[2]

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1. National Inst. of Standards and Technology, Gaithersburg, MD (United States)
2. Technion, Haifa (Israel). Dept. of Materials Engineering

The Ti layers in Al/Ti 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.

• OSTI ID: 271710
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 1 Vol. 44; ISSN XZ504Y; ISSN 1359-6454
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
COMPOSITE MATERIALS
CRYSTAL-PHASE TRANSFORMATIONS
FCC LATTICES
FREE ENERGY
HCP LATTICES
INTERFACES
ION BEAMS
LAYERS
MICROSTRUCTURE
MILLING
SURFACES
THIN FILMS
TITANIUM