ON THE VISCOSITY NEAR THE MELTING-POINT OF SOME LIQUID GLASS-FORMING TRANSITION-METAL ALLOYS

The kinematic viscosity near the melting point was measured for some t ransition metal-metalloid glass-forming alloys using an oscillating cr ucible viscosimeter. These alloys exhibit higher viscosity in the liqu id state, near the melting point, compared to that of liquid pure iron . As the viscosity of liquids is a structure-sensitive property, the e xperimental results reflect the strong interaction between transition metal atoms and glass-forming atoms in the investigated liquid alloys. They support the assumption of the existence of a chemical short-rang e ordering even in the liquid state of these alloys. The viscosity min imum and the high glass-forming abilities for alloys with 20% metalloi d can be explained by a cluster structure developing in the melt.