EFFECT OF INTERFACIAL WEIGHT LOSS BY SILVER MIGRATION ON THE PULLOUT STRENGTH OF SILVER WIRE EMBEDDED IN AN ADHESIVE MATRIX

摘要

In this study an effort is made to correlate interfacial weight loss, by migration, from the surface of silver wire embedded in adhesive matrix, to bond strength between the silver wire and the adhesive matrix. Comparative studies are also performed using aluminum wire in place of silver to accurately assess the effect of interfacial weight loss by silver migration. The results of the pullout tests on silver migrated specimens are compared with pullout tests on silver-wire specimens, which were immersed in water for 2 hours but without silver migration. Pullout tests are performed in both wet, and dry condition of the bonded specimens. It is determined that the pull-out strength of bonded silver-wire specimens in wet condition decrease by as much as 86%, subsequent to silver migration. The loss of bond strength for silver-migrated specimens tested in dry condition varies between 23% and 4%, depending on the embedded lengths used.