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In tribology, it is of importance to properly characterize the topography ofrough surfaces. In this work, the three-dimensional topographies of plaingrinding surfaces are measured through a white light interferometer, and theirgeometrical statistical features are analyzed. It is noticed that only when thetotal measured area is larger than a threshold value, is the statisticalcharacterization reasonable and stable, which should be kept in mind in actualmeasurements. For various plain grinding surfaces, the height ofasperity-summit obeys a Gaussian distribution, and the equivalent curvatureradius follows a modified F-distribution. These statistical characteristics arehelpful to analyze the contact and friction behaviors of rough surfaces.

The three-dimensional statistical characterization of plain grinding surfaces