Dresden 2026 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 18: Liquid and Amorphous Materials II

MM 18.1: Talk

Tuesday, March 10, 2026, 14:00–14:15, SCH/A315

Influence of Phosphorus Content on the Symmetry and Correlation Length of the Medium-Range Order in Pd-Ni-P Bulk Metallic Glasses — •Hongshuai Li, Harald Rösner, and Gerhard Wilde — Institute of Materials Physics, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany

Pd-Ni-P metallic glass is known as an excellent glass former, which enables systematic investigation of how variations in phosphorus (P) content affect its structural characteristics. In this study, we investigate the influence of P concentration on the dominant correlation length and the local symmetries of motifs within Pd-Ni-P metallic glass using fluctuation electron microscopy (FEM) and angular correlation microscopy. In FEM, the relationship between normalized variance and probe size can be used to examine the medium-range order (MRO) in amorphous materials. Our experimental results reveal that, as the composition deviates from the eutectoid composition Pd40Ni40P20, the correlation lengths associated with the dominating motifs undergo significant changes. Moreover, the volume fraction of the medium-range order increases as the P content diverges from the eutectoid composition. Regarding the symmetry analysis, the P content exerts a strong impact on the four-, five-, and six-fold symmetries. Specifically, as the P content moves away from the eutectoid composition, five-fold symmetry becomes prominent relative to the four- and six-fold symmetries.

Keywords: Bulk Metallic Glass; Angular correlation microscopy; Fluctuation electron microscopy (FEM); Nanobeam diffraction; Medium-range order