The effect of an interfacial layer containing nanosized Pb particles on the damping behavior in Al18B4O33/Al composite

The damping behavior of Al18B4O33 whisker-reinforced aluminum composites with and without an in situ reaction layer including nanosized Pb particles at the Al18B4O33–Al interface was studied. Experimental results indicate that Pb particles at the interface between Al18B4O33 and Al alter the dislocation status of the Al matrix adjacent to the interface, resulting in a change in damping properties of the Al18B4O33/Al composites. The damping peak at medium temperature (about 150 °C) in the Al18B4O33/Al composite was ascribed to a dislocation mechanism.