Frame No Frame | # Hyperscript # Defects in Crystals © H. Föll # Winter Term 2012 | Hyperscripts of AMAT: General Information Index

All Information concerning the Seminar will - in time - be found here
Contacts: Iris Hölken: ih@tf.uni-kiel.de Sandra Nöhren: sn@tf.uni-kiel.de
The Seminar / Mini Conference | Group | Date
First Part Friday, Jan 25th 2013, "Aquarium"
1 | Thermodynamics of Point Defects in Ionic Crystals described by Mass Action Law | Muhammad Omer Farooq Muhammad Taha Sultan | 25. 01.13 1.00 p.m.
| Explain the extension of the mass actio law to defects. Discuss shortly the problems with notation (Schottky, Kröger-Vink) |  |
| Give a simple example for the application to ionic crystals |  |
| All necessary information can be found in the hyperscript. |  |
2 | Ionic Sensors | Patrick Hayes Egle Vasiliauskaite | 25.01.13 1.30 p.m.
| Describe the basic principle using the oxygen sensor as example |  |
| Give a more complex example involving Brouwer diagrams |  |
| Information can be found in the hyperscript + plenty of easy to find literature |  |
3 | Positron Annihilation Techniques | Alexander Denissenko Avula Venkata Sridhar Reddy | 25.01.13 2.00 p.m.
| How it is done? |  |
| Derivation of basic equations· |  |
| Extension of the techniques (angle correlation, application to non-crystals, …) |  |
| Prof. Rätzke is an expert and might be approached Link 1 |  |
4 | Point defects in iron and steel | Stefanie Schlüter Grit Köppel | 25.01.13 2.30 p.m.
| Present and discuss the available data for vacancies and self interstitial in bcc and fcc iron (ferrite and austenite). |  |
| Discuss the influence of phase changes including magnetization on diffusion. |  |
| Discuss diffusion limited processes during phase change. |  |
| (Present and discuss the available data for carbon interstitials in bcc and fcc iron (ferrite and austenite). Consequences for the processing of steel.) |  |
| Information will be provided |  |
5 | Dislocations and Plastic Deformation in Hexagonal Crystals | Jan Jakobeit Chima Obobi Kalu | 25.01.13 3.00 p.m.
| Describe the specialities of plastic deformation in hex. crystals as a function of the crystal and defect symmetry |  |
| Give examples, discuss the technical importance. |  |
Second Part Friday, Feb. 1st 2013, "Aquarium"
6 | Dislocations and Plastic Deformation in bcc Crystals | Chen Rui Qaisar Latif Mozammal Manzoor | 01.02.13 1.00 p.m.
| Describe the specialities of plastic deformation in bcc crystals. Consider glide systems, the role of screw dislocations |  |
| Consider low temperature deformation; twinning as a deformation mode |  |
| Applications, state of the art, outlook |  |
7 | Defects in Quasicrystals (Nobel Prize 2011) | Jannis Lemke Tahsin Raman | 01.02.13 1.30 p.m.
| History, general background for periodic tilings in 2 Dimensions |  |
| Quasicrystal as projections from 6-dim. crystals |  |
| Point defects and diffusion, Phasons and quasi-dislocations, State of the art and problems |  |
8 | Intrinsic gettering in silicon | Alexander Hinz Alexander Omelcenko | 01.02.13 2.00 p.m.
| The problem and the solution |  |
| How it is done· Examples |  |
| Limits, use in, e.g., solar cells. |  |
9 | Critical thickness for epitaxial layers· | Sebastian Mangelsen Michael Poschmann | 01.02.13 2.30 p.m.
| Derive and discuss basic equations· |  |
| Discuss ways to overcome problem, give examples |  |
10 | GaN epitaxy | Till Jurgeleit Arne Kudropp | 01.02.13 3.00 p.m.
| Describe necessity, problems and existing solutions |  |
| Discuss modern development (GaN on Si) |  |
| Link 1 |  |