Abstract
Load controlled nanoindentation in conjunction with a potential step method were utilized for the investigation of precipitated iron sulfate film stresses and growth. Two types of experiments have been undertaken on thin sheet samples of Fe 3% Si single crystal in 1 M H2SO4. Samples were either allowed to deflect in the indentation direction or constrained. A distinctive difference between the indentation curves for the above two types of tests allowed separation of the effects of film stresses and local electrochemical processes. A proposed theoretical model accounting for both electrochemical and mechanical effects allowed modeling of the indenter tip motion following a potential step. Within the scope of the model, the time dependent film thickness (3.5 μm at maximum), electrostrictive film stress (330 MPa at maximum) have been determined.
Original language | English (US) |
---|---|
Pages (from-to) | 251-256 |
Number of pages | 6 |
Journal | Materials Research Society Symposium - Proceedings |
Volume | 522 |
State | Published - 1998 |
Event | Proceedings of the 1998 MRS Spring Symposium - San Francisco, CA, USA Duration: Apr 13 1998 → Apr 15 1998 |