Abstract
The standard tensile adhesion test (TAT), ASTM C633, has been modified to perform multiple tests on flat and wide substrates. The TAT geometry, which specifies a 1-in. (25.4-mm)-diameter cylindrical substrate, has been used as the pull-off bar. Two renditions of this test were implemented and the Weibull moduli and characteristic stresses for both test methods obtained. The modified TAT, termed as the single-bar (SB) method, yields a higher Weibull modulus and characteristic strength than the other method, which is termed the double-bar (DB) method. It is believed that the different test results between the two methods arise from different stress distributions near the interface of the coating and substrate.
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Leigh, S.H., Berndt, C.C. A test for coating adhesion on flat substrates—a technical note. JTST 3, 184–190 (1994). https://doi.org/10.1007/BF02648276
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DOI: https://doi.org/10.1007/BF02648276