Author:
Voigtmann Thomas,Siebenbürger Miriam,Amann Christian P.,Egelhaaf Stefan U.,Fritschi Sebastian,Krüger Matthias,Laurati Marco,Mutch Kevin J.,Samwer Konrad H.
Abstract
AbstractColloidal 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.
Publisher
Springer Science and Business Media LLC
Subject
Materials Chemistry,Colloid and Surface Chemistry,Polymers and Plastics,Physical and Theoretical Chemistry
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