Sintering—Pressure- and Temperature-Dependent Contact Models

T. Weinhart*, R. Fuchs, T. Staedler, M. Kappl, S. Luding

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

    Abstract

    Sintering granular materials involves the application of pressure and temperature to make the particulate material a permanent solid. In order to better understand this complex process, the pressure-, temperature-, and time-dependent contact behaviour of micron-sized particles has been studied in close collaboration by the groups of Luding, Staedler and Kappl within the DFG SPP PiKo. This chapter summarises the modelling advances made during the project, with direct links given to the experimental results. Two aspects have been studied: (a) the dependence of the elastic as well as frictional contact forces and torques on an applied normal pressure; and (b) the formation and evolution of adhesive bonds between particles during heat-sintering. Both contact models have been experimentally calibrated and validated, using advanced techniques such as nanoindentation and AFM. As materials, borosilicate particles were used to study the pressure-dependency, while polystyrene particles were chosen due to their low glass transition temperature to study the temperature-dependency near the transition. Combining both aspects provides a multi-purpose contact model that allows the simulations of a wide range of sinter and agglomeration processes for a variety of practically relevant materials.
    Original languageEnglish
    Title of host publicationParticles in Contact
    Subtitle of host publicationMicro Mechanics, Micro Process Dynamics and Particle Collective
    EditorsSergiy Antonyuk
    Place of PublicationCham
    PublisherSpringer International Publishing AG
    Pages311-338
    Number of pages28
    ISBN (Electronic)978-3-030-15899-6
    ISBN (Print)978-3-030-15898-9
    DOIs
    Publication statusE-pub ahead of print/First online - 1 Aug 2019

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