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Rheology of colloidal and metallic glass formers

Voigtmann, Thomas and Siebenbürger, M. and Amann, Christian P. and Egelhaaf, S. U. and Fritschi, S. and Krüger, Matthias and Laurati, Marco and Mutch, K. and Samwer, Konrad (2020) Rheology of colloidal and metallic glass formers. Colloid and Polymer Science. Springer. doi: 10.1007/s00396-020-04654-z. ISSN 0303-402X.

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Colloidal hard-sphere suspensions are convenient experimental models to understand soft matter, and also by analogy the structural-relaxation behavior of atomic or small-molecular fluids. We discuss this analogy for the flow and deformation behavior close to the glass transition. Based on a mapping of temperature to effective hard-sphere packing, the stress-strain curves of typical bulk metallic glass formers can be quantitatively compared with those of hard-sphere suspensions. Experiments on colloids give access to the microscopic structure under deformation on a single-particle level, providing insight into the yielding mechanisms that are likely also relevant for metallic glasses. We discuss the influence of higher-order angular signals in connection with non-affine particle rearrangements close to yielding. The results are qualitatively explained on the basis of the mode-coupling theory. We further illustrate the analogy of pre-strain dependence of the linear-elastic moduli using data on PS-PNiPAM suspensions.

Item URL in elib:https://elib.dlr.de/135037/
Document Type:Article
Title:Rheology of colloidal and metallic glass formers
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Voigtmann, ThomasThomas.Voigtmann (at) dlr.deUNSPECIFIED
Siebenbürger, M.Luisiana State UniversityUNSPECIFIED
Amann, Christian P.Universität KonstanzUNSPECIFIED
Egelhaaf, S. U.Universität Düsseldorf, GermanyUNSPECIFIED
Fritschi, S.Universität KonstanzUNSPECIFIED
Krüger, MatthiasUniversität GöttingenUNSPECIFIED
Laurati, MarcoUniversita di MilanoUNSPECIFIED
Mutch, K.Universität Düsseldorf, GermanyUNSPECIFIED
Samwer, KonradUniversität GöttingenUNSPECIFIED
Journal or Publication Title:Colloid and Polymer Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:rheology; colloidal suspensions; metallic alloys
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Material Design and New Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Voigtmann, Dr.rer.nat. Thomas
Deposited On:25 May 2020 07:13
Last Modified:25 May 2020 07:13

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