Ductile-brittle features appear in the fracture. Intergranular and cleavage fracture take place in the grain of A12O3. Ductile fracture appears in the bonding phase, and slight tearing edge it formed.

• 该材料断口呈韧-脆特征；沿晶与解理为Al_2O_3颗粒的两种主要断裂机制；粘接相的断裂以解理与撕裂为主；有轻度撕裂棱产生.