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MM: Fachverband Metall- und Materialphysik

MM 34: Poster session II

MM 34.2: Poster

Dienstag, 21. März 2017, 18:30–20:30, P4

Synthesis and analysis of electrodeposited Ni-P nanoglass — Farnaz Abdollahzadeh Davani, Stefan Ostendorp, •Martin Peterlechner, Daniel Gaertner, Sergiy Divinskiy, and Gerhard Wilde — Institute of Materials Physics, Universität Münster, Münster, Germany

Nanoglasses, i.e. glassy materials characterized by two different nano-scaled glassy structures have recently been discovered. As yet, their structure, dynamics and stability are a matter of controversy. In the present work, electrodeposited amorphous Ni-P thin films with a granular sub-structure were chosen as a model system and layered granular structures were grown by applying pulsed voltages. Due to the relatively simple synthesis route and cheap costs the system is an excellent candidate for future studies on the nanoglasses. Using transmission electron microscopy and energy-dispersive X-ray spectroscopy it is shown that phosphorous-rich layers are fully amorphous. The glass transition was investigated by means of differential-and fast-scanning calorimetries. The bimodal structure and the broad glass transition signal are indications that the pulse-deposited Ni-P thin film is a nanoglass, according to the definition given in the literature. Thus, multilayerd nanocrystalline-nanoglassy systems can be prepared by pulsed electrodeposition and subsequent aging. The results are discussed with respect to the structure and stability of Ni-P nanoglass.