Hugo Rojas Cháveza y David Jaramillo Vigueras
Centro de Investigación e Innovación Tecnológica - IPN Cerrada CECATI s/n, C.P. 02250 México D.F. ahrojasc@ipn.mx.
Recibido: 28 de septiembre de 2007;
Aceptado: 14 de enero de 2008
]]> Resumen
La resistividad eléctrica (ρT) de los solderings depende de su composición química, los obtenidos por proceso convencional (fusión-extrusión) requieren de tratamientos térmicos de envejecido o variar la composición química para incrementar la ρT. Con la técnica de Aleado Mecánico por Compactación Múltiple Cerrada (AM-CMC) sólo es necesario variar los ciclos de compactación (cc) para incrementar la resistividad eléctrica del soldering de composición química constante.
Palabras clave: Resistividad eléctrica, Composición química constante, Soldering.
Abstract
Mechanical alloys of 40Pb-60Sn (eutectic) and 34Pb-65Sn-1Zn (ternary) were produced through multiple closed die compaction. Differential thermal analysis (DTA) revealed melting temperatures of studied materials. A eutectic like behavior, during melting, was observed in the mechanical alloys formed, even for the first compaction cycle (cc). Electrical resistivity measurements (ρT) were carried out on eutectic, ternary and commercial soldering. For the eutectic MA, an increase in the electrical resistivity of 54% was observed, when compared to commercial soldering. For the ternary alloy such increase was 69%.
Keywords: Electrical resistivity, Multiple closed die compaction, Soldering.
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