Devitrification behavior and mechanical property of Cu54Ni6Zr22Ti18 glass powders

Cu54Ni6Zr22Ti18 amorphous materials were prepared using gas atomization, followed by spark plasma sintering (SPS). The crystallization behavior and mechanical properties were studied using X-ray diffractometer (XRD), differential scanning calorimeter (DSC) and transmission electron microscope (TEM). With annealing the gas atomized powders to the temperatures of 837 K and 909 K, fine particles such as Cu10Zr7 and Cu51Zr14 were precipitated and embedded in the amorphous matrix, respectively. Each size of precipitates at 909 K is about 50 nm and 20 nm, respectively. Microstructural variation and mechanical properties were investigated as a function of the initial powder size and spark plasma sintering (SPS) pressure.