Ceramic/Metal Interface Toughness and Its Experimental Measurement
陶瓷／金属连接界面韧性及其实验测定

Based on the principle of energy superposition and by using the equivalent transformation for beam sections, an expression for calculating the energy releasing rate of interface crack growth in a sandwich beam specimen is developed, and the toughness for the interface of Si 3N 4/Al formed by vacuum diffusion method is measured by a particularly designed four point bending test system. The technique provided by this research could be used for improving the bonding design and evaluating the fracture resistance of ceramic/metal interfaces.