info:eu-repo/semantics/article
Microstructural characterization in Al-C-Al2O3 Composites Produced by Mechanical Milling.
Autor
AUDEL SANTOS BELTRAN
VERONICA GALLEGOS OROZCO
IVANOVICH ESTRADA GUEL
MARIO MIKI YOSHIDA
Institución
Resumen
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.
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