Loading...
Please wait, while we are loading the content...
Similar Documents
Nanomechanical properties of rough surfaces
| Content Provider | Scilit |
|---|---|
| Author | de Souza, Gelson Biscaia Foerster, Carlos Eugênio Silva, Silvio Luiz Rutz da Lepienski, Carlos Maurício |
| Copyright Year | 2006 |
| Description | The nanoindentation technique allows the determination of mechanical properties at nanometric scale. Hardness (H) and elastic modulus (E) profiles are usually determined by using the Oliver-Pharr method from the load/unload curves. This approach is valid only for flat surfaces, or at least, when a very low degree of asperity is present (lower than 30 nm). The basic statement is the determination of the zero tip-surface contact point. If a rough surface is present, errors can occur in determining this contact point and, as a consequence, the surface hardness and elastic modulus profiles are drastically altered resulting in under evaluated values. Surfaces with different roughness were produced by controlled nitrogen glow discharge process on titanium. The changed nitriding parameters were different N2/H2 atmospheres and temperatures (600 °C-900 °C). The most correct H and E profiles were obtained by using the contact stiffness analysis method, proposed here, that overcomes the surface roughness. The obtained results were compared with available literature data |
| Related Links | http://www.scielo.br/pdf/mr/v9n2/29611.pdf http://www.scielo.br/scielo.php?script=sci_pdf&pid=S1516-14392006000200009&lng=en&nrm=iso&tlng=en |
| Ending Page | 163 |
| Page Count | 5 |
| Starting Page | 159 |
| ISSN | 15161439 |
| e-ISSN | 19805373 |
| DOI | 10.1590/s1516-14392006000200009 |
| Journal | Materials Research |
| Issue Number | 2 |
| Volume Number | 9 |
| Language | English |
| Publisher | FapUNIFESP (SciELO) |
| Publisher Date | 2006-06-01 |
| Access Restriction | Open |
| Subject Keyword | Materials Research Coatings and Films Nanomechanical Properties of Rough Surfaces |
| Content Type | Text |
| Resource Type | Article |
| Subject | Mechanics of Materials Condensed Matter Physics Materials Science Mechanical Engineering |
