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The tribological properties of FeCl 2 , measured using an ultrahigh vacuum tribometer, are compared with those of KCl. The friction coefficient of an FeCl 2 film evaporated onto iron in ultrahigh vacuum decreases to ~0.08 after the deposition of a film ~40A thick. This value is in good agreement with that measured for reactively formed FeCl 2 films in a pin and v-block apparatus...
The friction coefficients of thin KCl films deposited onto clean iron in ultrahigh vacuum are measured using a tungsten carbide tip. A rapid decrease is found in the friction coefficient from ∼ 2 for clean iron to 0.27 ± 0.03 after the deposition of ∼40 Å of KCl. Based on previous contact resistance measurements, this was proposed to be due to the completion of the first layer of KCl. The first-layer...
Friction coefficients are measured in ultrahigh vacuum using a tungsten carbide tribopin against thin films of sodium chloride and potassium iodide deposited onto clean iron. It is found, in accordance with previous measurements for potassium chloride on iron, that the friction coefficient falls from an initial value of ∼ 2 for the clean iron surface to a minimum value after a few tens of Ångstroms...
The frictional properties of thin KCl films deposited onto clean iron are measured in ultrahigh vacuum using a tungsten carbide tribotip, where the observed initial rapid decrease in friction coefficient with film thickness is proposed to be due to the formation of a complete KCl monolayer where the friction coefficient of this film is ~0.27. A 1800Å thick KCl film shows a hardness and friction coefficient...
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