Crystallization behavior of Ni-Nb-Sb system bulk metallic glass

Abstract

The crystallization of (Ni8Nb5)99.5Sb0.5 bulk metallic glass at the temperature of 700°C in the synthetic air was investigated. Crystallization occurred to form the columbite NiNb2O6 and oxides Nb2O5 and NiO. The surface presented the compact and continuous structure. The cross section shows that the oxide scale is about 40 µm depth. The upper scale forms the compact structure, however, loose one with the lamellar structure was observed with the depth. In the internal, a compact transition layer was also seen.