▎ 摘　　要

The in fl uence of the various content of the multilayered graphene (MLG) on the structural and me- chanical properties of the fi nal bulk porous silicon nitride-zirconia (Si 3 N 4 -ZrO 2 ) based ceramics was investigated. The ceramic composites were prepared in the form of the laminated structure with different (5-30-5 wt% and 30-5-30 wt%) MLG content by hot isostatic pressing. Homogeneous distri- bution of the MLGs, a completed phase transition from a to 13-Si 3 N 4 in case of 5 wt% MLG have been observed. The structural examinations revealed that the multilayered graphene and zirconia particles owing to their different sizes and shapes in fl uenced the porous microstructure evolution and the related mechanical properties of the composites. The sandwich structures enhanced the mechanical properties compared to reference ceramic with 30 wt% MLG. The position of the layer with higher graphene con- tent, high ratio of a/13 phase of Si 3 N 4 and higher porosity had crucial effect on the fi nal mechanical properties.