2,808
edits
Changes
→Destructive Testing
*Saw-Cutting <br />A crossing pattern is cut with a fine saw into the contact tip. Areas that are not bonded fall off in pieces.<br />
*Metallographic Micro-section <br />In a metallographic micro-section perpendicular to the contact surface wetting defects can also be made visible ''<xr id="fig:CdO tip on Cu carrier"/> (Fig. 3.14)'' which however are only indicative of the brazing temperature and brazing time.<br /><figure id="fig:CdO tip on Cu carrier">
[[File:CdO tip on Cu carrier.jpg|right|thumb|Mechanical Braze joint with voids. Ag/CdO tip on Cu carrier.]]
*Shear test <br />The contact tip is sheared off from the carrier with the required shear force being a measure for the bond quality. This method is especially suitable for hard and brittle contact tip materials such as for example tungsten.<br />
