Please use this identifier to cite or link to this item: http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1212
Composites of Aluminum Alloy 7075 with Silver Nanoparticles Prepared by Mechanical Milling
RUBEN FLORES CAMPOS
ARTURO PONCE PEDRAZA
ROGELIO DEAQUINO LARA
IVANOVICH ESTRADA GUEL
MARIO MIKI YOSHIDA
JOSE MARTIN HERRERA RAMIREZ
ROBERTO MARTINEZ SANCHEZ
Acceso Abierto
Sin Derechos Reservados
Aluminum Alloy 7075
Aluminum alloy nanocomposites have been emerged due to their high mechanical properties and low densities, one of the routes of production is the mechanical milling due to its relatively easy way of processes it. During mechanical milling the different powder of the matrix are collisioning by milling media and are deforming, welding and fracturing repeatedly, during the process, the nanoparticles are tramped within the matrix powder. Conforms the powder is milled, its morphology change to an equiaxial form and the particle size is reduced conform the milling time increase. The nanoparticles within the matrix acts like second phase particles finely and homogeneously dispersed, which promote the reinforcement of the alloy breaking the dislocation motion. Nanocomposites base aluminum were prepared introducing carbon coated silver nanoparticles (Ag-C NP) into the matrix of the Al 7075 alloy (Al7075) by mechanical milling process in a high energy SPEX mill, the milling time was set at 5 and 10 h, hardened stell vials and balls were used as a milling media, the milling ball to powder ratio was set at 4:1, and methanol was added as a PCA. Silver nanoparticles modify the powder particle size as well as crystallite size acting as PCA, these avoid the dissolution of the MgZn2 compound and increases the Vickers Hardness Number. It has been found that exist a saturation point where microhardness values stars to decay. The present work is focused in the improvement of the Al 7075 alloy introducing second phase particles with nanometer size into the aluminum matrix, by a solid state method like mechanical milling (MM). Microstructural and mechanical properties are discussed
2009
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Appears in Collections:Artículos en Congresos

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