Abstract
The stability of Al-rich glasses in the Al–La–Ni ternary system has been measured. Glasses with critical thicknesses ranging from 270 to 780 μm have been achieved. An in-situ two-phase amorphous region containing as much as ∼10 vol.% of nanocrystals was also observed with critical thicknesses ranging from 420 to 950 μm. Measurements of T g, T x and T ℓ, as well as other empirical measures of thermal stability based on these quantities, confirm the unusual thermal stability of these glasses. These results suggest that bulk Al-based glasses with a maximum critical thickness exceeding 1 mm may be possible in alloys based on this system.
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