超音波法によるセラミックス/金属接合材の界面破壊過程の実測および評価

概要

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Fracture processes in the bending of Si_3N_4-steel joints were investigated. The initiation stresses of interface fracture and cracked areas were measured by the ultrasonic method. The results obtained are as follows. (1) The increase of the ultrasonic echo height corresponds to the increase of the specimen compliance. Using the ultrasonic method, the interface fracture process can be detected. (2) The interface crack grew on the interface in a stable manner with increasing stress intensity factor, K_1. (3) At the maximum stress, the interface crack deflected to the ceramic side in an unstable manner. The criterion for the deflection is that the stress intensity factor K_1 for the interface crack taking into consideration the joining residual stress component must reach the K_<IC> for Si_3N_4.
一般社団法人日本機械学会の論文
1995-07-25