Surface Microanalysis Investigations of Friction and Lubrication
Final rept. 1 Mar 98-28 Feb 99
CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF CHEMICAL ENGINEERING
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An apparatus has been designed, constructed, and tested that will allow microanalysis of surfaces used in tribological investigations. This is the second generation improvement on a unique apparatus at Carnegie Mellon University that allows measurement of frictional forces between single crystalline metal surface prepared and characterized under ultra-high vacuum conditions. This is based upon a vacuum tribometer that allows simultaneous measurement of normal and shear forces between single crystalline surfaces. Prior work with this apparatus had relied upon preparation and analysis of surfaces prior to their being brought into contact for friction measurements. It has been limited by the inability to identify and analyze microscopic contact points on the surface following friction measurements. The modifications to the apparatus include the addition of a Scanning Electron Microscope and an Scanning Auger Microprobe which allow both imaging and elemental analysis of the surfaces.