%0 Conference Paper
%A Pereira da Silva, Joao Gustavo
%A Cao, Chen
%A Mishra, Tarini Prasad
%A Mücke, Robert
%A Guillon, Olivier
%T THERMAL RUNAWAY, DYNAMIC STABILITY AND PROCESS CONTROL IN FLASH SINTERING
%M FZJ-2019-03014
%D 2019
%X Flash sintering is an innovative sintering method in which a critical combination of electrical field and temperature triggers a sudden densification in seconds. Due to the nature of the process, the flash sintering conditions lead to a non-linear conductivity surge followed by current control. This work tries to answer some questions related to process control during flash sintering by using a dynamic system model-based approach. An explicit solution for the folding points in the voltage control mode is presented (Figure 1). The analytical model uses a dynamic bifurcation approach which explains why the current control mode always leads to a steady state, due to the unicity of the solution to the equations, and why different modes of flash sintering such as current-controlled or power-controlled lead to a more uniform process. The model is validated with experiments in Cerium Oxide doped with Gadolinium and Yttrium.
%B Electric Field Enhanced Processing of Advanced Materials II: Complexities and Opportunities
%C 10 Mar 2019 - 15 Mar 2019, Tomar (Portugal)
Y2 10 Mar 2019 - 15 Mar 2019
M2 Tomar, Portugal
%F PUB:(DE-HGF)6
%9 Conference Presentation
%U https://juser.fz-juelich.de/record/862794