Frame No Frame |
HyperscriptDefects 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 |