Effect of Decomposition Kinetics and Failure Criteria on Binder-Removal Cycles From Three-Dimensional Porous Green Bodies

A previously developed algorithm can be used to predict the minimum time for the thermal removal of binder from porous green ceramic bodies. The algorithm combines a variational statement on internal pressure, which is generated by binder decomposition, with a transport model that treats the convective flow of binder decomposition products in a porous medium. The minimum time heating cycles depend on a number of coupled transport, kinetic, and dimensional parameters. The predicted minimum time heating cycles depend on the decomposition kinetics (activation energy, preexponential factor, and decomposition mechanism) and on the temperature and pressure at which failure occurs in the green body.