Li, Y. J.; Choi, P.; Goto, S.; Borchers, C.; Raabe, D.; Kirchheim, R.: Evolution of strength and microstructure during annealing of heavily cold-drawn 6.3 GPa hypereutectoid pearlitic steel wire. 53rd International Field Emission Symposium (IFES), Tascaloosa, AL, USA (2012)
Choi, P.: Characterization of advanced functional and structural materials using Atom Probe Tomography. Inauguration symposium for the Atom Probe facilities ETH Zürich, Zürich, Switzerland (2011)
Cojocaru-Mirédin, O.; Choi, P.; Würz, R.; Abou-Ras, D.; Raabe, D.: Explorer les interfaces à l’échelle atomique dans les cellules photovoltaïques CIGSe. Commissariat à l’Energie Atomique et aux Energies Alternatives, Grenoble, France (2011)
Herbig, M.; Li, Y.; Choi, P.: Atomic Analysis of Concentration Changes at Interfaces by Atom Probe Tomography. SFB 761 Doktorandenseminar, RWTH Aachen, Germany (2011)
Cojocaru-Mirédin, O.; Choi, P.; Abou-Ras, D.; Wuerz, R.; Liu, T.; Schmidt, S. S.; Caballero, R.; Raabe, D.: Characterization of internal interfaces in Cu(In,Ga)Se2 thin-film solar cells using Atom Probe Tomography. Euromat 2011, Montpellier, France (2011)
Choi, P.: Study of local chemical gradients in advanced precipitation hardened steel using atom probe tomography. THERMEC 2011, Québec City, QC, Canada (2011)
Choi, P.: Characterization of CuInSe2 and CuInGaSe2 thin-film solar cells using Atom Probe Tomography. International Conference on Electronic Materials and Nanotechnology for Green Environemnt, Jeju Island, South Korea (2010)
Cojocaru-Mirédin, O.; Choi, P.; Wuerz, R.; Raabe, D.: Atomic-scale distribution of impurities in CuInSe2-based thin-film solar cells. 52nd International Field Emission Symposium IFES 2010, Sydney, Australia (2010)
Dmitrieva, O.; Choi, P.; Ponge, D.; Raabe, D.; Gerstl, S. S. A.: Laser-pulsed atom probe studies of a complex maraging steel: Laser pulse energy variation and precipitate analysis. 52nd International Field Emission Symposium IFES 2010, Sydney, Australia (2010)
International researcher team presents a novel microstructure design strategy for lean medium-manganese steels with optimized properties in the journal Science
In collaboration with Dr. Edgar Rauch, SIMAP laboratory, Grenoble, and Dr. Wolfgang Ludwig, MATEIS, INSA Lyon, we are developing a correlative scanning precession electron diffraction and atom probe tomography method to access the three-dimensional (3D) crystallographic character and compositional information of nanomaterials with unprecedented…
Conventional alloy development methodologies which specify a single base element and several alloying elements have been unable to introduce new alloys at an acceptable rate for the increasingly specialised application requirements of modern technologies. An alternative alloy development strategy searches the previously unexplored central regions…
Adding 30 to 50 at.% aluminum to iron results in single-phase alloys with an ordered bcc-based crystal structure, so-called B2-ordered FeAl. Within the extended composition range of this intermetallic phase, the mechanical behavior varies in a very particular way.
This project aims to correlate the localised electrical properties of ceramic materials and the defects present within their microstructure. A systematic approach has been developed to create crack-free deformation in oxides through nanoindentation, while the localised defects are probed in-situ SEM to study the electronic properties. A coupling…
By using the DAMASK simulation package we developed a new approach to predict the evolution of anisotropic yield functions by coupling large scale forming simulations directly with crystal plasticity-spectral based virtual experiments, realizing a multi-scale model for metal forming.
The aim of this project is to correlate the point defect structure of Fe1-xO to its mechanical, electrical and catalytic properties. Systematic stoichiometric variation of magnetron-sputtered Fe1-xO thin films are investigated regarding structural analysis by transition electron microscopy (TEM) and spectroscopy methods, which can reveal the defect…