1. 4/24/2002, Wednesday Surface 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.
When two surfaces come into sliding contact, the friction heat produced at their contacting interface can lead to rapid temperature rises termed flash temperature. The determination of these temperatures, in general, is a subject of long standing interest and has received considerable consideration in the literature. Of specific interest here is the estimation of flash temperature in computer hard-disk drivers. These systems feature a slider carrying a head which reads/writes to a disk it flied above. Occasionally, the head makes contacts with the disk because of the extremely low flying heights at which it operates in present day drivers. The temperatures such incidences caused are of some concern to the data storage industry.

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