The fracture toughness of the h-BN/Si3N4 ceramic composite decreases with increasing h-BN content; however,the reduction extent is not pronounced due to the effect of the h-BN particles on the cracks propagation.

• 随着h-BN含量增加；h-BN/Si3N4陶瓷复合材料的断裂韧性下降；但由于h-BN颗粒对裂纹扩展的影响；因而其下降程度不大.