Abstract
The focus of this study is to clarify effects of interface edge condition in Metal side on the bonding strength of ceramic to metal joint. Geometrical interface shape at the edge of the interface is characterized by edge angle in both sides of the ceramic and metal defined as a configuration angle between the free surface and the interface. As the edge angle of Si3N4 is right angle, the edge angle of Ni is set over 30°≤φ2≤180°. Experimental results showed that maximum tensile bonding strength was observed at the edge angles of φ2=135°. It seems that this geometrical condition is critical conditions of the bonding strength and fracture patterns. Setting nearφ2=135° improves the bonding strength since it decreases the residual stress near the edge of the interface on ceramic side. This paper provides a useful geometrical interface shape to improve tensile bonding strength of ceramic to metal joint.
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