Please use this identifier to cite or link to this item: http://cimav.repositorioinstitucional.mx/jspui/handle/1004/2229
Microstructural characterization in Al-C-Al2O3 Composites Produced by Mechanical Milling.
AUDEL SANTOS BELTRAN
VERONICA GALLEGOS OROZCO
IVANOVICH ESTRADA GUEL
MARIO MIKI YOSHIDA
Acceso Abierto
Sin Derechos Reservados
ALUMINUM-BASED COMPOSITES
Aluminum-graphite-copper (Al-C-Cu) novel micro-composites have been produced using the Mechanical Alloying process (MA). The mechanical properties of the obtained composites have been evaluated. Yield strength (σy) values reached in the composites are considerably higher than those reported for pure aluminum. There is a direct relationship between σy and final graphite content in the composite. σy values increase as the nominal C content increases as well. We found that the most important hardening element was the graphite. We found that the optimal ratio Cu/C correspond to 0.33% for different volume fractions of graphite and cooper. There is an apparent synergy effect in σy between Cu and C. Results of TEM analysis have shown the presence of alumina particles in fiber shape from oxide surface of powder. Presence of alumina fibers in the composite improves the mechanical properties.
2005
Artículo
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