Damping behavior of Bi2O3-coated Al18B4O33 whisker-reinforced pure Al composite

摘要: Abstract A pure aluminum matrix composite reinforced by Al 18 B 4 O 33 whisker with Bi 2 3 coatings was fabricated squeeze casting method. The damping behaviors of the coated composites are investigated. introduction at interface between and in during process plays an important role improvement capacity. results characterization indicate that capacity strongly depends on coating contents vibration frequencies. mechanisms have changed when frequency changed. presence a critical temperature damping-temperature curves has been found first frequencies decreased increasing contents. dominant transferred from dislocation (below temperature) into interfacial (beyond temperature).