In this study we combined nanoindentation techniques with mechanics-based models to determine interfacial fracture energies in a 16 μm thick styrene-acrylate film on T-6061 aluminum sheet and a 1.6 μm thick Epon 828/T403 epoxy film on sputtered aluminum. For the styrene-acrylate film, interfacial fracture occurred at a fracture energy of 8.9 J/m2. The epoxy film failed much more readily with a fracture energy of 0.2 J/m2. However, the addition of an adhesion-promoting interlayer improved the epoxy film performance to the point where the films did not fail even when the indentations exceeded the film thickness.
|Materials Research Society Symposium - Proceedings
|Published - 2000
|Interfaces, Adhesion and Processing in Polymer Systems - San Francisco, CA, United States
Duration: Apr 24 2000 → Apr 27 2000
Bibliographical noteFunding Information:
The authors gratefully acknowledge the support of U.S. DOE Contract DE-AC04-94AL85000. A. Strojny and W. W. Gerberich also acknowledge the support of the Center for Interfacial Engineering at the University of Minnesota under grant NSF/CDR-8721551.