TITLE:
Nucleation of Fe-Rich Intermetallic Phases on α-Al2O3 Oxide Films in Al-Si Alloys
AUTHORS:
Pilar Orozco-González, Manuel Castro-Román, Simitrio Maldonado-Ruíz, Sergio Haro-Rodríguez, Fabián Equihua-Guillén, Rodrigo Muñiz-Valdez, Salvador Luna-Álvarez, Miguel Montoya-Dávila, Alejandra Hernández-Rodríguez
KEYWORDS:
Aluminum Alloys, Intermetallics, Nucleation, Crystal Growth, Oxide Films
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.3 No.1,
January
6,
2015
ABSTRACT: Nucleation of Fe-rich intermetallic phases on α-Al2O3 oxide films was analyzed in five experimental Al-Fe-Mn-Si alloys. In an attempt to verify the role of α-Al2O3 films in nucleating Fe-rich intermetallics, experiments have been conducted under conditions where formed in situ oxide films were present. Some Fe-rich intermetallics are observed to be related with the oxide films in the microstructure, the present results are in accordance with some research that suggest that the Fe-rich intermetallic phases nucleate upon the oxide films. The intermetallic phases and α-Al2O3 films were unambiguously identified with the help of complementary techniques such as thermal analysis, SEM/EDS and X-ray diffraction.