There are no reported Al-rich alloys that are both easy glass formers upon melt-spinning processing without RE additions and have a crystallization temperature sufficiently high to ensure long metastable life times at room temperature. A representative of a new family of ternary Al-based glasses is described here that contains Ni and Ta with total additive element concentration as low as 15 at % and its devitrification characteristics are reported. Using the melt-spinning technique under protective atmosphere, the alloy Al 85Ni9Ta6 easily forms a ductile glass, with the crystallization onset temperature Tx 370°C, enthalpy of transformation ΔH 68 J/g and an activation energy of crystallization Ea 266.83 kJ/mole, i.e., 2.76 eV.
ASJC Scopus subject areas
- Physics and Astronomy(all)