Abstract：TiB2 particle reinforced /Cu matrix composites were prepared by hot pressing sintering. The effects of different TiB2 particle additions on the microstructure and properties were studied by XRD, OM, SEM and other test methods.The results show that the composite material produces a high intensity Cu diffraction peak, and a hybrid reinforcing phase composed of TiB2 and TiB has been formed in the Cu matrix. All the reinforced phases in the composite samples distribute uniformly, and the samples with 6% TiB2 particle addition contain two kinds of reinforced phases: particle and whisker.When the proportion of TiB2 particle content increases, the hardness of all Cu matrix composite samples increases, while the density decreases and the conductivity increases.TiB2(6%)/Cu composite samples form four characteristic peaks during DSC heating.When the temperature reaches 800 ℃, Cu3Ti intermetallic compound is formed. As the temperature rises to 1 100 ℃, TiB2 particles and TiB whiskers are generated simultaneously in the matrix.
2020, Vol. 30 
