The Effect of Film Thickness on the Solid Lubrication by Molybdenum Disulphide -The Film Thickness on the Solid Lubrication-

Abstract

The lubricity of the transferred molybdenum disulphide layer has been studied in the ultra high vacuum friction tester. The dry molybdenum disulphide powder was burnished onto copper surfaces and molybdenum surfaces under controlled conditions of load at the room temperature. The following facts have been confirmed through the observations. 1) It was deduced that the life of the film was decided by the behaviour of the microscopic fracture near the surfaces, i. e., by the fracture behaviour of molybdenum disulphide cristallite when copper specimens were used, and contrary by the fracture behaviour of metal molybdenum near the surface when molybdenum specimens were used. 2) Though the transferred molybdenum disulphide film was the same, the wear resistance was variable in accordance with the base metals. 3) Even if the base metals were made of hard material, the molybdenum disulphide film had not a long life-time.