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4/24/2002, Wednesday Surface Roughness

4/24/2002, Wednesday Surface Roughness. Fatigue Fracture. Temperature distribution at Head-Disk Interface. G.B. Sinclair Dept. of Mechanical Engineering, LSU. Two half spaces represent a slider and moving disk, make contact through a

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4/24/2002, Wednesday Surface Roughness

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  1. 4/24/2002, WednesdaySurface Roughness

  2. Fatigue Fracture

  3. Temperature distribution at Head-Disk Interface G.B. Sinclair Dept. of Mechanical Engineering, LSU Two half spaces represent a slider and moving disk, make contact through a rectangular patch. The model is used to generate representative statistics for the heat partition and temperature distribution at the interface.

  4. Thermal instability introduced by surface roughness M.M. Khonsari Dept. of Mechanical Engineering, LSU High speed sliding contact between nominally flat surfaces is generally associated with a significant frictional heat at the interface giving rise to a form of thermally induced damage where macroscopic areas of high temperature concentrations appear on the surface.

  5. Tribology

  6. Scale Dependent Hardness

  7. Self-Similarity

  8. Etching Micro-machining Etching on the silicon wafer

  9. Chemical Potential

  10. Creep by Barriers on Dislocation Sliding

  11. Creep Barrier

  12. Model

  13. Chemical Potential for Etching in Strained Solid g is the surface energy density Curvature Strain energy difference w0 is the strain energy of flat surface

  14. Finger-print of surface residual stress

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