Formation of a crystalline-glass composite in a Cu-based bulk metallic glass by using the Cu-Pb monotectic system

摘要

To synthesize a crystalline-glass composite in a Cu-based bulk metallic glass, the monotectic reaction was used. The (Zr-Sn-Pb)-rich crystalline phase was found to coexist with the (Cu-Ti-Ni)-rich glassy phase during the process of quenching from the melt in the (Cu47Ti33Zr11Ni6Sn2Si1)100-x+Pbx=1.2 system. Microstructures consisting of uniformly dispersed crystalline particles in the amorphous matrix were observed by scanning electron microscope (SEM) antrtransmission electron microscope (TEM). Compressive tests demonslrated that the fracture strain of the sample with a Pb content of 1 at% was three times higher than that of the sample with no Pb.