Method for measuring an adhesive strength of a multi-layer material

A method for measuring adhesive strength of a multi-layer material, said method comprising:

• placing a mold on one surface of said multi-layer material to be tested;
• casting a brazing metal into said mold to form and secure a resulting cast structure to said one surface of the multi-layer material, said structure including a first column portion connected to and extending substantially upright from said one surface, an intermediate portion extending upright from the upper end of said first column portion and diverging upward in diameter, and a second column portion extending from the upper end of said intermediate portion;
• selecting said first column portion to have a length sufficiently small to prevent breakage thereof while measuring the adhesive strength of said multi-layer material
• causing one of a pair of chucks of a tension tester to grasp said second column portion of the cast structure and the other of said chucks to grasp said multi-layer material or a holder adapted for mounting therein said multi-layer material;
• and
• applying a tensile force to the respective layers of said multi-layer material in a direction transverse to said layers.