Damping capacity and tensile property of alumina borate hisker-reinforced aluminum composite in interface at room temperature

To improve the capacity of Al ₁₈B ₄O ₃₃w/Al at room temperature, bismuth with a low melting point was introduced into the interface of the composite by in situ reaction. The influence of the coating contents on the tensile properties and damping capacities of the coated composites at room temperature were investigated. The results indicated that the tensile properties of the coated composites decrease and the damping capacity increased with the increasing of coating contents, while the damping value of the coated composites strongly depend on not only the coating contents, but the strain amplitude. A damping peak in the coating composites at low strain amplitude (about 4×10 ^-4) was observed, which attributed to dislocation mechanism. When the strain amplitude exceeded 6×10 ^-4, the damping was caused by the interfacial micro-slip.