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MM: Fachverband Metall- und Materialphysik

MM 10: Poster Session 1

MM 10.5: Poster

Monday, September 5, 2022, 18:00–20:00, P2

Effect of temperature pre-treatments on atomic dynamics in PdNiP studied with ECM — •Olivia Vaerst, Martin Peterlechner, and Gerhard Wilde — Institute of Material Physics, University of Münster, Germany

Pre-treatments on amorphous PdNiP, such as annealing and treatments of thermo-mechanical kind, significantly influence the local structure, kinetic stability, and mechanical properties of this bulk metallic glass (BMG).

In the present work, Pd₄₀Ni₄₀P₂₀ samples are pre-treated thermally by annealing them at different temperatures below the glass transition temperature. The resulting well-defined states are investigated via transmission electron microscopy (TEM) with electron correlation microscopy (ECM) at room temperature. ECM is used to study atomic rearrangements and dynamics in the material at nanometer spatial resolution [1,2]. The effect of thermal pre-treatments on ECM evaluation parameters is discussed. Such investigations of the atomic mobility in pre-treated PdNiP give further insight into underlying mechanisms and properties of the amorphous phase as well as on the local relaxation dynamics of a bulk metallic glass.

[1] L. He at al., Microsc. and Microanal. 21 (2015) 1026-1033.

[2] K. Spangenberg et al., Adv. Funct. Mater. 31 (2021) 2103742.