Controlled Failure Structure for Ceramic/Metal Assemblies
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
When a metal pin is brazed or soldered to the surface of a ceramic body, excessive force on the pin can cause a rupture of the ceramic body or the metal to ceramic interface. Either type of failure cannot be repaired, destroying the assembly. A solution is herein described whereby a reduction in the thickness of the shank of the pin causes failure of the pin shank, permitting the assembly to be repaired by standard pin replacement methods. The figure shows a sectional view of the ceramic/pin assembly. It consists of the ceramic body 1, a metallized pad 2 fired onto the ceramic, braze alloy or solder 3, headed pin 4 with a reduced shank section 5.