Berlin 2018 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 41: Liquid and Amorphous Metals
MM 41.2: Vortrag
Mittwoch, 14. März 2018, 15:30–15:45, TC 010
Effect of Co microalloying on thermodynamic properties of a Pd40Ni40P20 bulk metallic glass — •Rene Hubek1, Mikhail Seleznev2, Isabelle Binkowski1, Martin Peterlechner1, Sergiy Divinski1, and Gerhard Wilde1 — 1Institute of Materials Physics, University of Münster, Germany — 2Togliatty State University, Togliatty, Russia
The physical properties of bulk metallic glasses are subject of intensive research especially with respect to their mechanical behavior. Recently, it was shown that the mechanical properties of a Pd40Ni40P20 bulk metallic glass could significantly be enhanced through cobalt microalloying [1]. In this report we are focusing on the low-temperature hear capacity and DSC measurements. The results are discussed in comparison to the reference Pd40Ni40P20 glass [2, 3]. The effect of plastic deformation and post-deformation annealing on the excess heat capacity at low temperatures, known as the *boson peak*, is thoroughly examined. For DSC measurements the relaxation behavior of the fictive temperature and the overshoot enthalpy is investigated.
These data are discussed with respect to the excess free volume distribution in the PdNiP glass and the impact of Co microalloying.
[1] N. Nollmann et al., Scripta Marerialia 111 (2016), 119-122
[2] Y.P. Mitrofanov et al, Acta Materialia 90 (2015) 318-329.
[3] I. Binkowski et al, Acta Materialia 109 (2016) 330-340.