Direct Multi‐Scale Modeling of Sintering

Maximenko, A.; Kuz’mov, A. V.; Grigoryev, E. G.; Olevsky, Eugene A.

doi:10.1111/j.1551-2916.2012.05083.x

Cited by 14 publications

(13 citation statements)

References 28 publications

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“…This approach has been implemented by Olevsky et al . In the second approach, the computational finite‐element framework at the macroscopic level includes mesoscopic simulators . An example, using the first approach, is illustrated in Figure , which is a simulation of the sintering of a cylindrical powder body with a cylindrical inclusion.…”

Section: Challenges and Outlookmentioning

confidence: 99%

Current understanding and future research directions at the onset of the next century of sintering science and technology

2017

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Sintering and accompanying microstructural evolution is inarguably the most important step in the processing of ceramics and hard metals. In this process, an ensemble of particles is converted into a coherent object of controlled density and microstructure at an elevated temperature (but below the melting point) due to the thermodynamic tendency of the particle system to decrease its total surface and interfacial energy. Building on a long development history as a major technological process, sintering remains among the most viable methods of fabricating novel ceramics, including high surface area structures, nanopowder-based systems, and tailored structural and functional materials. Developing new and perfecting existing sintering techniques is crucial to meet ever-growing demand for a broad range of technologically significant systems including, for example, fuel and solar cell components, electronic packages and elements for computers and wireless devices, ceramic and metal-based bioimplants, thermoelectric materials, materials for thermal management, and materials for extreme environments.In this study, the current state of the science and technology of sintering is presented. This study is, however, not a comprehensive review of this extremely broad field. Furthermore, it only focuses on the sintering of ceramics. The fundamentals of sintering, including the thermodynamics and kinetics for solid-stateand liquid-phase-sintered systems are described. This study summarizes that the sintering of amorphous ceramics (glasses) is well understood and there is excellent agreement between theory and experiments. For crystalline materials, attention is drawn to the effect of the grain boundary and interface structure on sintering and microstructural evolution, areas that are expected to be significant for future studies. Considerable emphasis is placed on the topics of current research, including the sintering of composites, multilayered systems, microstructure-based models, multiscale models, sintering under external stresses, and innovative and novel sintering approaches, such as field-assisted sintering. This study includes the status of these subfields, the outstanding challenges and opportunities, and the outlook of progress in sintering research. Throughout the manuscript, we highlight the important lessons learned from sintering fundamentals and their implementation in practice.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Section: Challenges and Outlookmentioning

confidence: 99%

Current understanding and future research directions at the onset of the next century of sintering science and technology

2017

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“…Therefore the model of Coble creep can be utilized for the modeling of sintering and pressing of this kind of powder materials. Modeling of the mass transfer in materials by grain‐boundary diffusion is one of the well‐developed domains of the sintering and pressing theory . The numerical approach used in this article is the extension of the algorithm proposed by Pan and Cocks .…”

Section: Statement Of the Problemmentioning

confidence: 99%

“…The value of

{\bar{- 2 M}}_{normalgb} = 10000

approximately corresponds to the mobility of grain boundaries of alumina as it was utilized in calculations . Because grain boundaries were assumed to be straight line segments, the modeling of the grain growth in unit cells was based on the prediction of the migration of the grain‐boundary junctions under the influence of the grain‐boundary tension imbalance in the junctions.…”

Section: Statement Of the Problemmentioning

confidence: 99%

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Homogenization of Biporous Agglomerated Powder Structures During High‐Temperature Consolidation

2015

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Specifics of agglomerate densification-important for hot pressing, conventional, and spark plasma sintering of powders-are analyzed based on the biporous material modeling framework. Numerical simulations are utilized to determine what technological parameters can be used to improve the postprocessing homogeneity of agglomerated powder-based materials. The modeling results indicate that the homogenization during sintering and hot pressing of agglomerated nano-and micrometer-size powders is significantly impacted by the viscosity of grain-boundary sliding and by the possible existence of high-intensity diffusion paths along the agglomerate boundaries.

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“…While early work was often restricted to computing individual stages of sintering in 2D models, [1][2][3] a broad range of approaches has been published in the meantime, covering 3D [4,5] and multiscale [6,7] simulations for all types of sinter processes. While early work was often restricted to computing individual stages of sintering in 2D models, [1][2][3] a broad range of approaches has been published in the meantime, covering 3D [4,5] and multiscale [6,7] simulations for all types of sinter processes.…”

Section: Introductionmentioning

confidence: 99%

Modeling Inherently Homogeneous Sintering Processes

Raether¹,

Seifert²

2018

Advcd Theory and Sims

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A novel Monte Carlo model for the simulation of sintering processes is introduced. Different from previous models, local interface curvature is considered in the acceptance of diffusion steps. This enables the investigation of the effects of interface energies on the sintering process. Sintering paths are calculated for various microstructures and interface energies. Results are interpreted in the framework of thermodynamic criteria for homogeneous sintering processes which were presented recently.Using Eq. (3), the grain boundary to surface energy ratio can be determined from the dihedral angle alone. [15] The surface energy

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Direct Multi‐Scale Modeling of Sintering

Cited by 14 publications

References 28 publications

Current understanding and future research directions at the onset of the next century of sintering science and technology

Current understanding and future research directions at the onset of the next century of sintering science and technology

Homogenization of Biporous Agglomerated Powder Structures During High‐Temperature Consolidation

Modeling Inherently Homogeneous Sintering Processes

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