Work of Adhesion Measurements by a Periodic Cracking Technique
In a recent study. Chow et al.1 introduced a technique* for determining the energy associated with interfacial separation of a two-layer composite which consisted of a polymeric substrate and a brittle film overcoat. The technique is based on a model which assumes a perfectly elastic composite. In the present study, it is shown that as long as only the film component of the composite is brittle, the technique is also applicable to the composites where the substrates may display plastic deformation prior to adhesive failure of the film. Strain measurements, instead of load, eliminate the difficulties introduced by the plastic behavior of the substrate. Experimental work was performed on systems containing brittle amorphous selenium films on aluminum and Mylar substrates. These systems with selenium films were of interest due to their usage in photoreceptor technology.
KeywordsCritical Strain Aluminum Film Strain Energy Release Adhesive Failure Elastic Composite
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- 1.T. S. Chow, C. A. Liu, and R. C. Penwell, Direct determination of interfacial energy between brittle and polymeric films. J. Polym. Sci. 14: 1305 (1976).Google Scholar
- 2.A. Davutoglğu, Determination of the work of adhesion by a periodic cracking technique, M. Sc. Thesis, Department of Metallurgical Engineering, Middle East Technical University, Ankara, Turkey (1980).Google Scholar
- 3.W. E. Snowden and t. A. Aksay, Measurement of thick film adhesion by an impact separation technique, in, “Surfaces and Interfaces in Ceramic and Ceramic-Metal Systems,” J. A. Pask and A. G. Evans, eds., Plenum, New York (1981).Google Scholar
- 4.G. E. Dieter, “Mechanical Metallurgy,” McGraw-Hill, Kogakusha, Ltd., Tokyo (1976).Google Scholar
- 5.İ. A. Aksay and K. S. Liang, unpublished work.Google Scholar