Microstructural evolution of rapid solidified Al-Ni alloys
Por:
Alejandro Martinez-Villalobos, Manuel, Alejandro Figueroa, Ignacio, Angel Suarez, Miguel, Lara Rodriguez, Gabriel Angel, Novelo Peralta, Omar, Gonzalez Reyes, Gonzalo, Alfonso Lopez, Ismeli, Verduzco Martinez, Jorge, Diaz Trujillo, Cesar
Publicada:
1 abr 2016
Categoría:
Chemistry (miscellaneous)
Resumen:
In this study, Al-Ni alloy ribbons in hypoeutectic, euctectic and hypereutectic compositions were obtained by melt spinning. The microstructural changes of the samples, from the as-cast to rapid solidification processes at different Cu wheel tangential velocities were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The rapid solidification caused morphological transformation of the Al-Al3Ni microstructure from acicular in the as-cast condition to globular in the melt spun ribbons and the growth of the metastable Al9Ni2 intermetallic compound, which acted as reinforcing particles. Due to the increment of the Ni content and the presence of these intermetallic compounds, with size of ~5nm, distributed in the aluminum matrix, the hardness of the alloys significantly increased from the hypoeutectic (90 VHN) to the hypereutectic (205VHN) composition. © 2016, Sociedad Química de México.
Filiaciones:
Alejandro Martinez-Villalobos, Manuel:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ, Mexico City 045410, DF, Mexico
Alejandro Figueroa, Ignacio:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ, Mexico City 045410, DF, Mexico
Angel Suarez, Miguel:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ, Mexico City 045410, DF, Mexico
Lara Rodriguez, Gabriel Angel:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ, Mexico City 045410, DF, Mexico
Novelo Peralta, Omar:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ, Mexico City 045410, DF, Mexico
Gonzalez Reyes, Gonzalo:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ, Mexico City 045410, DF, Mexico
Alfonso Lopez, Ismeli:
Univ Nacl Autonoma Mexico, Unidad Morelia, Inst Invest Mat, Campus Morelia UNAM, Morelia, Michoacan, Mexico
Verduzco Martinez, Jorge:
UMSNH, Inst Invest Met & Mat, Fco J Mujica S-N, Morelia 58030, Michoacan, Mexico
Diaz Trujillo, Cesar:
Univ Autonoma Baja California, Fac Ciencias Quim & Ingn, Tijuana, Baja California, Mexico
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