Theory 029/Materials Processing
Shrinkage Follows Dihedral Angle
The claim
Sintering shrinkage is set by the distribution of dihedral angles rather than by mean particle size.
01The mechanism
The dihedral angle sets the capillary driving force; a distribution with more low-angle necks densifies faster at the same size.
02Predictions
- P1Shrinkage should track the angle distribution.
- P2Particle size should matter less.
03Refutation
Shrinkage tracking particle size would remove the angle control.