Critical size effect for chemically doped β-cristobalite transformation

摘要

The behavior of cubic (β)-to-tetragonal (α) phase transformation in polycrystalline β-cristobalite was observed. Like other materials exhibiting transformation toughening, a critical grain size effect controlled the β-cristobalite was observed. Like most extensive shear-induced transformation was observed on grinding the densified β-cristobalite with an average grain size of 4-5 μm.