The effect of a molybdenum net interlayer in the interface between Al 2O 3 and Nb on the shear strength of the brazed joint is investigated. The existence of the net in Al 2O 3/Nb brazed interface could greatly increase the shear strength of the brazed joint. As compared with the fracture of stripped off large pieces of ceramics from the interface of those brazed joints without the molybdenum net interlayer, the fracture of brazed joints with the molybdenum net interlayer changes into a mixed type of fracture occured along the interface. A dividing effect of the net during solidification contraction of the interface greatly decreases the residual stress in the brazed joint. The improvement in the fracture behavior of the brazed joint with molybdenum net interlayer is caused by the dividing effect.