[T3] Modeling and Sintering

[15A-T3-03] Experimental Analysis of Compression Deformation at High-Temperatures and Numerical Simulation for BaTiO₃ Sintered Compacts

*H. Tanaka¹, H. Matsubara^2,4, H. Yokota¹, T. Iguchi³, Y. Takagi¹, H. Nomura⁴, S. Terasaka⁴, D. Igimi⁴ (1.Technology HQ, TDK Corporation, Japan, 2.Graduate School of Environmental Studies, Tohoku University, Japan, 3.Prior Art Development Dept., Ceramics condenser BG, TDK Corporation, Japan, 4.Materials R and D Lab, Japan Fine Ceramics Center, Japan)

Keywords:BaTiO3, sintering, yield formula, flow stress, FEM

Uni-axial compression tests were performed to derive yield stress equation, flow rules and coefficient of flow stress of BaTiO3 sintered compaction. These basic equations and their physical properties were introduced into the FEM. The drooping behavior of the thin-thickness specimen during the sintering was simulated and compared to the experimental drooping, where the specimens were composed of large or small average diameter BaTiO3, respectively. Resulting simulation drooping quantitatively reproduces that experiment. This result suggests that experimentally derived yield stress equation, non-Newtonian viscoplastic flow rule and coefficient of flow stress about several to 1000 GPa s of sintered BaTiO3 compaction were numerically validated.