Methods for predicting probability of current transmission through two Alodine(TM)-coated aluminum alloy plates in contact.

摘要

Electronic band structure properties were studied to understand electrical charge transport probability of two Alodine(TM) coated aluminum alloys in contact. Quantum mechanics is used to give the probability of transmission of the charge through the heterostructure under an applied bias.; Additionally, surface roughness and hardness data were studied. A statistical analysis of the roughness and hardness data yields parameters from which the occurrence of cold welding of the asperities can be measured.; Electrical conductance through these materials is influenced by alloy constituents, the natural oxide barrier width and height, the final cover layer cross-section, ductility of the basis metal and cover layer, applied load, and applied bias. This research presents history, use, and importance of these parameters, as materials alone and as they contribute to contact problems. Understanding these measured parameters assists in the selection of materials to be used for electrical contacts prior to the initiation of an expensive experimental phase. Also, this work serves as an historical overview of those involved in predicting conductivity through a macroscopic assembly.