Theory 154/Ceramic sintering/Rate lens
Densification Follows Diffusion
The claim
Sintering rate is set by the rate of grain-boundary diffusion rather than by temperature alone.
01Mechanism
Porosity closes as atoms move along boundaries; the diffusion rate sets how fast necks grow.
02Prediction
Density should track diffusion rate.
03Refutation
Density tracking time would remove the mechanism.