Abstract
Se presentan los resultados de composición química, microdureza y conductividad eléctrica obtenidos en materiales compuestos laminados Cu/Al, tratados térmicamente a temperaturas superiores a las del eutéctico Cu - Al. El bimetal Cu/Al fue obtenido por soldadura por explosión. La composición química del material tras los tratamientos térmicos se analizó por medio de análisis EDS (Espectroscopia de Energías Dispersiva de Rayos X). La conductividad eléctrica se midió mediante ensayos con corrientes Eddy. Las zonas endurecidas en el material soldado por explosión fueron identificadas. El valor experimental obtenido de la conductividad eléctrica está en concordancia con el calculado por la regla de las mezclas. Los tratamientos térmicos dan lugar a la formación de múltiples intercaras de alta dureza, compuestos de intermetálicos. La conductividad eléctrica de las intercaras identificadas es significativamente menor que las correspondientes al Cu y al Al.
Highlights
Clad metals are widely applied in a range of various industries
When such materials are subjected to heat, intermetallic compound interlayers can occur in the bond area of the composite
The effect can be represented by the following steps: when the material is heat treated above 548.2 °C, the solid state diffusion processes occur in thin adjacent to the bond areas of the composite
Summary
Clad metals are widely applied in a range of various industries. One of the main advantages of such materials is the ability to combine properties of their components. Al/Cu clad metals are usually used as conductors of electricity and heat (Veerkamp, 1995) When such materials are subjected to heat, intermetallic compound interlayers can occur in the bond area of the composite. The effect can be represented by the following steps: when the material is heat treated above 548.2 °C, the solid state diffusion processes occur in thin adjacent to the bond areas of the composite. In this case the solid state diffusion continues until the solubility limit (2.48 at.% Cu) is reached, which leads to the formation of liquid phase. The aim of this study is to investigate the properties of Al/Cu composites treated at temperature of contact melting
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