Publikation: Rheology of colloidal and metallic glass formers
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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.
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VOIGTMANN, Thomas, Miriam SIEBENBÜRGER, Christian P. AMANN, Stefan U. EGELHAAF, Sebastian FRITSCHI, Matthias KRÜGER, Marco LAURATI, Kevin J. MUTCH, Konrad H. SAMWER, 2020. Rheology of colloidal and metallic glass formers. In: Colloid and Polymer Science. Springer. 2020, 298(7), pp. 681-696. ISSN 0303-402X. eISSN 1435-1536. Available under: doi: 10.1007/s00396-020-04654-zBibTex
@article{Voigtmann2020-07Rheol-49958, year={2020}, doi={10.1007/s00396-020-04654-z}, title={Rheology of colloidal and metallic glass formers}, number={7}, volume={298}, issn={0303-402X}, journal={Colloid and Polymer Science}, pages={681--696}, author={Voigtmann, Thomas and Siebenbürger, Miriam and Amann, Christian P. and Egelhaaf, Stefan U. and Fritschi, Sebastian and Krüger, Matthias and Laurati, Marco and Mutch, Kevin J. and Samwer, Konrad H.} }
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