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The objective of this investigation was to gain some insight into the relation of friction to the adhesion or cohesion of metals in vacuum. This study was conducted with primarily metal single crystals in an attempt to attain a better understanding of the influence of basic metal properties such as orientation of planes, surface energy, work hardening and crystal structure on friction and adhesion. Thus, the variables of grain size and random crystallite orientation at the contacting interface are eliminated. It is the further purpose of this paper to supply quantitative data on the metals in vacuum. The following characteristics were examined; 1) atomic plane matching across an interface, 2) the effect of plane density and lattice spacing, 3) dissimilarity of coupled metals, 4) mutual solubility, and 5) the effect of crystal structure.
Buckley, Donald H.
NASA — Lewis Research Center,