Effect of Annealing on the Microstructure and Properties of In-situ Cu-Nb Microcomposite Wires

摘要

The effects of annealing on microstructure,magnetoresistance,and hardness of an in situ Cu-Nb microcomposite wire have been investigated.Neither changes in microstructure nor hardness were found until 500 ℃.Particularly,microstructural change within the Nb films was observed in the annealed samples.The room-temperature magnetoresistivity was almost negligible,while magnetoresistivity at-196 ℃ increased with magnetic field.At temperature above500℃,recovery and recrystallization occurred,and both the resistance and hardness decreased.