Abstract: Through the testing of K_IC value of 14mol%Ce-TZP and Ce-TZP/Al₂O₃ layered microcomposites with different fabric parameters, the influence of
Al₂O₃ layer thickness and Ce-TZP content in Al₂O₃ layer on the mechanical property of the materials was analysed in material and mechanics
perspective. In order to obtain the qulitatively explanation of the influence of Al₂O₃ layer on the transformation zone shape and transformation quantity, the Laser-Ramman
Micro Zone analysis on the section and side of K_IC sample fractured was adopted, thus the toughening mechanism of materials such as Ce-TZP/Al₂O₃ layered
microcomposites can be expected.

Key words: Ce-TZP, Ce-TZP/Al₂O₃ layered microcomposites, transformation toughening, Laser-Ramman Micro Zone analysis