Surface and Tribological Chemistry of Water and Carbon Dioxide on Copper Surfaces

摘要: The tribological chemistry of carbon dioxide and water vapor is studied on copper surfaces at high pressures, with a view to understand the gas-phase lubrication copper–copper sliding contacts. adsorption film formation properties are vapor-deposited films in an ultrahigh vacuum chamber using quartz crystal microbalance. nature reactively formed after reaction by ex situ X-ray photoelectron spectroscopy (XPS). Carbon adsorbs reversibly copper, while both irreversibly, where XPS reveals that irreversibly consists mixture cuprous oxide/hydroxide. Measuring thickness oxide/hydroxide as function pressure temperature its varies between about 6 14 A proportional total amount adsorbed surface. This results thinner higher temperatures. Measurements friction coefficient presence shows it correlates thickness, reaching limiting value ~0.35 for thicker films.