Brazing procedure for ceramic surfaces consists of preparing surfaces by creating holes of at least two different sizes in it

摘要

The procedure consists of structuring at least one of the ceramic surfaces prior to brazing by creating a series of holes (9) in its surface, using a Nd/Yag laser beam or mechanical means. The holes have a mean diameter (a, b) of more than 550 mcm, and are in two classes (A, B) which differ in their geometrical shape, diameter or depth. A number of holes in each class make up a geometrical group, and the spacing (x) between the centres of the holes in one group is smaller than the spacing between the centres of the holes in the other. Where the ceramic surfaces are fibre-reinforced and laminated the holes are made to a depth at least equivalent to that of the laminated layer.