Gold-aluminum thin-film interactions and compound formation

Journal Article · Mon Jun 01 04:00:00 EDT 1981 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.329214· OSTI ID:6469413

Majni, G; Nobili, C; Ottaviani, G; Costato, M; Galli, E

Phase formation has been studied in Au-Al thin-film interactions by means of /sup 4/He/sup +/ MeV backscattering and x-ray diffraction techniques. The films were annealed at temperatures low enough for no liquid phase formation. Au/sub 4/Al, Au/sub 5/Al/sub 2/, Au/sub 2/Al, AuAl, and AuAl/sub 2/ were detected from samples prepared by depositing the exact stoichiometry quantities of Au and Al. The phase formation sequence was determined. The first phase formed is Au/sub 5/Al/sub 2/; the others are observed with the disappearance of one phase previously formed. For instance, Au/sub 4/Al grows only when all Al is reacted and, on the other hand, AuAl/sub 2/ when all Au is reacted. The sequence of the phases in the Au-Al interactions cannot be interpreted on the basis of pure thermodynamic or kinetic arguments and a composite mechanism is proposed.

• Research Organization: Istituto di Fisica, Universita di Modena, Via Campi 213/A
• OSTI ID: 6469413
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 52:6; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ALLOYS
ALUMINIUM
ALUMINIUM ALLOYS
ANNEALING
BACKSCATTERING
CHARGED PARTICLES
COHERENT SCATTERING
DATA
DIFFRACTION
ELEMENTS
ENERGY RANGE
EVEN-EVEN NUCLEI
FILMS
GOLD
GOLD ALLOYS
HEAT TREATMENTS
HELIUM 4
HELIUM IONS
HELIUM ISOTOPES
INFORMATION
INTERACTIONS
INTERMETALLIC COMPOUNDS
IONS
ISOTOPES
KINETICS
LIGHT NUCLEI
MATHEMATICAL MODELS
METALS
MEV RANGE
NUCLEI
PHASE TRANSFORMATIONS
SCATTERING
STABLE ISOTOPES
STOICHIOMETRY
SYNTHESIS
THERMODYNAMICS
TIME DEPENDENCE
TRANSITION ELEMENTS
X-RAY DIFFRACTION