engleski

Boson Peak and Glass Forming Abillity in CuHfTi Metallic Glasses

Unlike many metallic glasses, CuHfTi system for some concentrations can form bulk metallic glass. In order to establish possible correlation between glass forming ability (GFA) and thermodynamic parameters we have measured heat capacity (Cp) for Cu55Hf45-xTix (x=0, 5, 10, ..., 45) system ranging from 1.8 K up to room temperature for as-cast and annealed samples. Cp of metallic glasses in general does not obey known phonon T3 law which predicts Debye model and one of the anomalies is a wide peak around 10 K which is known as boson peak (BP). Here, we present low-temperature Cp parameters and the intensity of the BP given as subtraction of the measured heat capacity and sum of the Debye phonon and electronic contribution as a function of x. The intensity of BP correlates well with GFA of studied CuHfTi alloys.

Metalna stakla; Sposobnost ostakljivanja; Bozonski vršak

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