Abstract
A recently developed model of adhesive wear for liquid lubricants has been modified to include the effect of vapor pressure on the wear rate for vapor lubricants at low pressures or high vacuum. Two distinctly different tests of the model were made with published data on the wear of graphite in varying atmospheres. In addition to correlating the experimental wear data as a function of pressure and heat of adsorption, the calculated value of the wear coefficient km for graphite-graphite contact from both correlations is internally consistent.