Regensburg 2025 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 6: Phase Transformations

MM 6.8: Vortrag

Montag, 17. März 2025, 17:45–18:00, H10

Investigation of glass formation in Pd40Ni40P20 metallic glass via fast scanning calorimetry — •Hongshuai Li, Sher Bahadur Raut, and Gerhard Wilde — Institute of Materials Physics, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany

Pd-Ni-P metallic glasses (MGs) exhibit exceptional glass-forming ability; in fact, Pd40Ni40P20 was the first bulk metallic glass-forming alloy discovered. Understanding glass formation in these materials requires exploring factors that impede correlated atomic motions in glass-forming liquids. This study investigates the atomic relaxation and thermal history of Pd40Ni40P20 MG, utilizing data from multiple cycles of heating around the glass transition temperature, activation energy determined by flash differential scanning calorimetry (DSC), and critical cooling rates. Additionally, we examine the effects of annealing time on the DSC signals at high heating rates of up to 1000 K/s. Our results demonstrate that adjustments in cooling rates and annealing duration significantly influence glass transition behavior and thermal stability. These findings enhance our understanding of the mechanisms underlying glass formation in Pd-Ni-P MGs and their potential applications in advanced materials.

Keywords: Metallic Glass; Relaxation dynamics; Crystallization; Flash DSC; Critical cooling rate