Strength-Structure-Chemistry Relationship for Metal/Ceramic, Metal/ Polymer and Ceramic/Ceramic Interfaces

摘要

This ARO-funded program was unusually successful as it accomplished much beyond the proposed goals of (1) uncovering of basic molecular and microstructural-level mechanisms that govern adhesion between dissimilar metal and ceramic components in film/substrate geometry; (2) development of an interface tensile strength data base; (3) development of two novel toughness- measuring tools, leading to hitherto unreported basic toughness data, the absence of which had blocked the further development of first principle calculations for understanding adhesion; (4) the latter measurements were also used to confirm the fundamental nature of the tensile strength data obtained by the laser spallation experiment, and its relation to the data obtained by other techniques. In addition, the program culminated into (a) technology development that led to the use of the laser spallation concept, and its transfer in few cases, to companies worldwide, belonging to different industries, such as semiconductor (Intel Corporation, Hitachi, Dow Corning Corporation), automobile (Delco), television (LG Gould in Korea), biomedical (Pacesetter Inc., Baxter Corporation), aircraft engines (Pratt and Whitney, Westinghouse Corporation), paint (Du Pont), and Dentistry, (c) use of technology for addressing new basic problems in different disciplines, such as biomedical (treatment of arrhythmia, and dissolution of body fat), earth sciences, ice mechanics (newer-types of hydrophobic coatings), and (d) recording of the highest interface crack speeds which now has questioned the well established dynamic fracture frameworks.