Figure 1

Behaviours of the CCDs. (a) Trend of the CCDs of the 304 ring-discs in different H₂O₂ solutions, (b) the average oxygen contents of the wear surfaces subjected different oxidation times with 70% and 30% H₂O₂ solutions, CCDs in the 70% H₂O₂ solution at (c) 60 s and (d) 3300 s, CCDs in the 10% H₂O₂ solution at (e) 60 s and (f) 3300 s, and (g) increasing amplitudes of the CCDs for one cycle in different H₂O₂ solutions at 60 s and 3300 s.