-“Structural and thermal properties on Cu-Hf-Ti ternary metallic glasses”

L. C. DAMONTE; A.F.PASQUEVICH; L. A.MENDOZA-ZÉLIS; I.FIGUEROA VARGAS; H.DAVIES; I.TODD

Bs.As., Argentina

Congreso; At the Frontiers of Condensed Matter III, New Trends in Structural, Electronic and Magnetic Properties of Matter; 2006

TANDAR,

Cu-based ternary metallic glasses are promising for practical applications since they joint together interesting mechanical properties like strong glass-forming ability, high strength, ductility and low cost. It was observed that composition and variety of constituents improve some of the above properties against others. In particular, for the Cu-Hf-Ti system, Ti addition increases the thermal stability of the alloy.   In this work we study the thermal stability on melt-spunn Cu-Hf-Ti ribbons at different Ti content by differential scanning calorimetry (DSC).  The short range order evolution with annealing treatments was also investigated by means of perturbed angular correlation (PAC). The results for the starting alloys indicate that the short range order can be described by a dense packing of atoms (DRP) The electric field gradient (EFG) behavior with alloy composition is comparable to that previously observed in binary and multicomponet Zr and Hf-based amorphous alloys.