Fabricación y caracterización de materiales compuestos de matriz metálica Al-Cu y Al-Mg reforzados con partículas de TiC

A. Contreras, E. Bedolla

Abstract


The pressureless melt infiltration of Al-Cu and Al-Mg alloys into particulate 56 vol.% TiC preforms was studied. The infiltration of aluminum alloys varying the Mg and Cu content was compared with the infiltration rate of pure aluminum and were carried out in a thermogravimetric analyzer. It was found that the infiltration rate of Al-Mg$_{x}$ increases as the magnesium content increases. On the contrary, infiltration rate of Al-Cu$_{x}$ increases with decreasing copper content. For both systems the higher the temperature the faster the infiltration rate. Comparing the results at the infiltration temperature of 900$^\circ$C, the infiltration rate was greater with the Al-Cu$_{x}$ alloys than Al-Mg$_{x}$ alloys, but never was greater than pure Al. Moreover, the infiltration of pure magnesium into the preforms was faster than the Al-Mg$_{x }$alloys. XRD studies of composites containing copper confirmed the formation of CuAl$_{2}$ phase, the amount increasing with the Cu content in the composites. For the AlMg$_{x}$ matrix composites, no reaction phase was detected.

Keywords


Composites; TiC; Al-Mg alloys; Al-Cu alloys; infiltration

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Revista Mexicana de Física

ISSN: 2683-2224 (on line), 0035-001X (print)

Bimonthly publication of Sociedad Mexicana de Física, A.C.
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