High heating rate sintering and microstructural evolution assessment using the discrete element method
Mirele Horsth Paiva Teixeira,
Vasyl Skorych,
Rolf Janssen,
Sergio Yesid Gómez González,
Agenor De Noni Jr,
João Batista Rodrigues Neto,
Dachamir Hotza,
Maksym Dosta
Affiliations
Mirele Horsth Paiva Teixeira
Institute of Solids Process Engineering and Particle Technology (SPE), Hamburg University of Technology (TUHH), Hamburg, Germany; Graduate Program in Materials Science and Engineering (PGMAT), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Corresponding author. Institute of Solids Process Engineering and Particle Technology (SPE), Hamburg University of Technology (TUHH), Hamburg, Germany.
Vasyl Skorych
Institute of Solids Process Engineering and Particle Technology (SPE), Hamburg University of Technology (TUHH), Hamburg, Germany
Rolf Janssen
Institute of Advanced Ceramics, Hamburg University of Technology (TUHH), Hamburg, Germany
Sergio Yesid Gómez González
Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
Agenor De Noni Jr
Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
João Batista Rodrigues Neto
Graduate Program in Materials Science and Engineering (PGMAT), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
Dachamir Hotza
Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Graduate Program in Materials Science and Engineering (PGMAT), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
Maksym Dosta
Institute of Solids Process Engineering and Particle Technology (SPE), Hamburg University of Technology (TUHH), Hamburg, Germany
An original discrete element model for coupling thermo-mechanics with sintering is presented to disclose the thermo-micromechanical behavior of particulate systems and their densification process under rapid firing. This paper focuses on the numerical model formulation and application on the fast firing of Al2O3, including its verification with literature. Particular emphasis is given to the evolution of thermal and densification gradients over sintering conditions and sample length, zeroing in on the shrinkage evolution and the characteristic densification phenomena. Relationships between defects, microstructure, and sintering parameters are also explored. Finally, the time-dependent change of material microstructure concerning coordination number evolution, cohesive neck size distribution, gradients of temperature, and sample length are analyzed. The numerical results present good agreement with experimental data from the literature.
