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Deuterium penetration into the bulk of a steel ball of a ball bearing due to its rotation in vacuum

Applied Surface Science
Publication Date
DOI: 10.1016/s0169-4332(98)00811-3
  • Friction
  • Contacts
  • Adatoms
  • Deuterium
  • Diffusion
  • Secondary Ion Mass Spectroscopy


Abstract The experiments were performed to study a phenomenon of mechanically stimulated solution of adatoms into the bulk under friction. A ball bearing with carbon chromium steel balls of 3.97 mm diameter was used for testing. An axial load of L=34 N was applied per ball. After degassing the ball bearing performed a total of 23.8×10 3 revolutions at n=196 rpm at deuterium pressure p=5×10 −2 Torr. The same ball bearing was kept in the chamber without motion as a reference. The SIMS depth profiling of the contact surface areas of the ball shows that deuterium concentration has the highest value of C 0=1.3×10 18 atoms cm −3 at a depth of 0.1 μm from the surface. Then, it decreases to a background value of C 1=6.5×10 16 atoms cm −3 at a depth less than 0.55 μm. For the reference ball, a considerable deuterium concentration was observed only on the surface. These results are in a good agreement with recent computer simulation of the phenomenon.

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