Measurement of Thick Film Adhesion by an Impact Separation Technique
Two basic approaches have been followed in the measurement of adhesion values, (1) thermodynamic and (2) mechanical. Adhesion measurements by thermodynamic methods can usually provide accurate information on the chemical nature of the interfaces. However, an understanding of the response of the interfacial system to mechanical loading is often of greater practical importance, and of fundamental significance as well. Reliable adhesion data of this nature cannot easily be obtained. Although numerous mechanical techniques have been devised to measure adhesion forces, acceptable relations between an applied force and that required for adhesive failure at the interface cannot generally be established.1, 2 Only relative values for force of adhesion can be determined.
KeywordsImpact Velocity Tensile Wave Stress Wave Velocity Sessile Drop Experiment Lawrence Livermore Laboratory
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