Ceramic Sintering: Densification & Grain Growth

Ceramics are fired, not melted, into their final dense form: a pressed bed of powder particles densifies through solid-state diffusion as necks grow between touching grains, closing the pore network and shrinking the part. This simulator models that firing process with real sintering kinetics — an Arrhenius temperature dependence, a two-sphere neck-growth model, a cubic grain-growth law, and a combined Ryshkewitch/Hall-Petch strength prediction. Push the sintering temperature up and the bed densifies faster, but the same diffusion also coarsens the grains, which can quietly erode the strength gained from eliminating porosity — the central trade-off every industrial firing schedule is designed around.