Measurement of interfacial energy from extraction replicas of particles on grain boundaries

Abstract

Cumulative frequency distribution curves of apparent dihedral angles expected on extraction replicas are derived from distributions of true dihedral angles by analysis of the projected image shapes of lenses situated on boundaries of random orientation in the solid. The predictions are compared with observations on cementite particles in α-iron and silica particles in copper. It is shown that mean true dihedral angles can be reliably obtained from the mean apparent dihedral angles measured on extraction replicas.