09:40 〜 10:00
[15A-T3-03] Experimental Analysis of Compression Deformation at High-Temperatures and Numerical Simulation for BaTiO3 Sintered Compacts
キーワード:Barium titanate, sintering, yield stress, coefficient of flow stress, simulation
In this study, basic equations (yield stress equation, flow rules) and physical properties of barium titanate (BaTiO3) are experimentally obtained. These equations and physical properties are introduced to finite element method and sintering behavior of BaTiO3 bulk is simulated. From the uni-axis compression test, yield stress equation of BaTiO3 is expressed by Shima’s equation and flow rule is written by plastic equation. The coefficient of flow stress of BaTiO3 is significantly smaller than literature Alumina and the value depends on grain size. By using these, the experimental sintering deformation is quantitatively reproduced by numerical simulation. In addition, the coefficient of flow stress could be determined by sensitivity analysis, where the flow stress is analyzed as simulation parameter. Through this study, experimentally obtained basic equations and physical properties are numerically validated.