Direct Experimental Determination of Grain Boundary Excess Volume in Metals
- Author(s)
- Eva-Maria Steyskal, Bernd Oberdorfer, Wolfgang Sprengel, Michael Zehetbauer, Reinhard Pippan, Roland Würschum
- Abstract
The grain boundary excess volume, i.e., the grain boundary expansion, e(GB), was experimentally determined for high-angle grain boundaries in nickel using the direct technique of high-precision difference dilatometry. Values of e(GB) = (0.35 +/- 0.04) x 10(-10) m and e(GB) (0.32 +/- 0.04) x 10(-10) m were obtained by measuring the removal of grain boundary volume upon grain growth for two different types of ultrafine-grained samples. The results are discussed in comparison to values obtained so far from indirect techniques and from computer simulations. It demonstrates the strength of the presented novel, direct approach for grain boundary expansion measurements.
- Organisation(s)
- Physics of Nanostructured Materials
- External organisation(s)
- Technische Universität Graz, Österreichische Akademie der Wissenschaften (ÖAW)
- Journal
- Physical Review Letters
- Volume
- 108
- No. of pages
- 5
- ISSN
- 0031-9007
- DOI
- https://doi.org/10.1103/PhysRevLett.108.055504
- Publication date
- 2012
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 210006 Nanotechnology, 103018 Materials physics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/direct-experimental-determination-of-grain-boundary-excess-volume-in-metals(e0f833ac-c994-43fa-b12e-9c4f63e01eec).html