ADHESION TESTING OF GLASS-CERAMIC THICK-FILMS ON METAL SUBSTRATES

The adhesion of thick glass-ceramic films bonded to metal substrates was measured using five different tests: tensile delamination using a bonded stud, scratch testing, an interfacial shear test, indentation and a bend test. All the tests proved to have limitations, and no test gave a fully quantitative measure of adhesion. However, the different tests did rank the samples in the same order of adhesion strength. This indicates that although a fully quantitative method of testing the adhesion of thick films has not yet been developed, many of the published tests can be used to obtain qualitative data.